./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix020.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/mix020.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version bcb38a6f 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/mix020.opt.i ./goblint.2024-05-21_14-57-05.files/protection/mix020.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-bcb38a6-m [2024-06-04 14:53:29,085 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-04 14:53:29,157 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-04 14:53:29,169 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-04 14:53:29,170 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-04 14:53:29,192 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-04 14:53:29,193 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-04 14:53:29,193 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-04 14:53:29,194 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-04 14:53:29,198 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-04 14:53:29,198 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-04 14:53:29,199 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-04 14:53:29,199 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-04 14:53:29,200 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-04 14:53:29,200 INFO L153 SettingsManager]: * Use SBE=true [2024-06-04 14:53:29,201 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-04 14:53:29,201 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-04 14:53:29,201 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-04 14:53:29,201 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-04 14:53:29,201 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-04 14:53:29,202 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-04 14:53:29,202 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-04 14:53:29,202 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-04 14:53:29,202 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-04 14:53:29,202 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-04 14:53:29,203 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-04 14:53:29,203 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-04 14:53:29,203 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-04 14:53:29,204 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-04 14:53:29,204 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-04 14:53:29,205 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-04 14:53:29,205 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-04 14:53:29,206 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-04 14:53:29,206 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-04 14:53:29,206 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-04 14:53:29,206 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-04 14:53:29,206 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-04 14:53:29,206 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-04 14:53:29,207 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-04 14:53:29,207 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-04 14:53:29,207 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-04 14:53:29,207 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-04 14:53:29,207 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-04 14:53:29,208 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-04 14:53:29,407 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-04 14:53:29,423 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-04 14:53:29,425 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-04 14:53:29,425 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-04 14:53:29,426 INFO L274 PluginConnector]: CDTParser initialized [2024-06-04 14:53:29,427 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix020.opt.i [2024-06-04 14:53:30,456 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-04 14:53:30,637 INFO L384 CDTParser]: Found 1 translation units. [2024-06-04 14:53:30,638 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix020.opt.i [2024-06-04 14:53:30,651 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0afd923ba/251c7210d68c43689bf37b444f778731/FLAGb642b4e91 [2024-06-04 14:53:30,661 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0afd923ba/251c7210d68c43689bf37b444f778731 [2024-06-04 14:53:30,663 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-04 14:53:30,664 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-04 14:53:30,664 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix020.opt.yml/witness.yml [2024-06-04 14:53:30,807 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-04 14:53:30,808 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-04 14:53:30,809 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-04 14:53:30,809 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-04 14:53:30,813 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-04 14:53:30,813 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.06 02:53:30" (1/2) ... [2024-06-04 14:53:30,814 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@255fe77a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:53:30, skipping insertion in model container [2024-06-04 14:53:30,814 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.06 02:53:30" (1/2) ... [2024-06-04 14:53:30,815 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@65c219fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:53:30, skipping insertion in model container [2024-06-04 14:53:30,816 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 02:53:30" (2/2) ... [2024-06-04 14:53:30,816 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@255fe77a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:53:30, skipping insertion in model container [2024-06-04 14:53:30,816 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 02:53:30" (2/2) ... [2024-06-04 14:53:30,816 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-04 14:53:30,913 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-04 14:53:30,914 INFO L97 edCorrectnessWitness]: Location invariant before [L867-L867] ((((((((((((((((((((((! multithreaded || z$r_buff1_thd1 == (_Bool)0) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1)))) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) [2024-06-04 14:53:30,914 INFO L97 edCorrectnessWitness]: Location invariant before [L869-L869] ((((((((((((((((((((((! multithreaded || z$r_buff1_thd1 == (_Bool)0) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1)))) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) [2024-06-04 14:53:30,914 INFO L97 edCorrectnessWitness]: Location invariant before [L871-L871] ((((((((((((((((((((((! multithreaded || z$r_buff1_thd1 == (_Bool)0) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1)))) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) [2024-06-04 14:53:30,914 INFO L97 edCorrectnessWitness]: Location invariant before [L872-L872] ((((((((((((((((((((((! multithreaded || z$r_buff1_thd1 == (_Bool)0) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1)))) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) [2024-06-04 14:53:30,915 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-04 14:53:30,915 INFO L106 edCorrectnessWitness]: ghost_update [L865-L865] multithreaded = 1; [2024-06-04 14:53:30,953 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-04 14:53:31,239 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-04 14:53:31,248 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-04 14:53:31,421 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-04 14:53:31,461 INFO L206 MainTranslator]: Completed translation [2024-06-04 14:53:31,462 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:53:31 WrapperNode [2024-06-04 14:53:31,462 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-04 14:53:31,463 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-04 14:53:31,463 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-04 14:53:31,463 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-04 14:53:31,469 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:53:31" (1/1) ... [2024-06-04 14:53:31,498 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:53:31" (1/1) ... [2024-06-04 14:53:31,528 INFO L138 Inliner]: procedures = 176, calls = 54, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 161 [2024-06-04 14:53:31,530 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-04 14:53:31,531 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-04 14:53:31,531 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-04 14:53:31,532 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-04 14:53:31,548 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:53:31" (1/1) ... [2024-06-04 14:53:31,548 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:53:31" (1/1) ... [2024-06-04 14:53:31,563 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:53:31" (1/1) ... [2024-06-04 14:53:31,581 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]. [2024-06-04 14:53:31,582 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:53:31" (1/1) ... [2024-06-04 14:53:31,582 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:53:31" (1/1) ... [2024-06-04 14:53:31,605 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:53:31" (1/1) ... [2024-06-04 14:53:31,625 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:53:31" (1/1) ... [2024-06-04 14:53:31,627 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:53:31" (1/1) ... [2024-06-04 14:53:31,629 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:53:31" (1/1) ... [2024-06-04 14:53:31,631 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-04 14:53:31,634 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-04 14:53:31,634 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-04 14:53:31,634 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-04 14:53:31,635 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:53:31" (1/1) ... [2024-06-04 14:53:31,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-04 14:53:31,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-04 14:53:31,672 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) [2024-06-04 14:53:31,674 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 [2024-06-04 14:53:31,706 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-04 14:53:31,706 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-04 14:53:31,706 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-04 14:53:31,707 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-04 14:53:31,707 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-04 14:53:31,707 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-04 14:53:31,707 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-04 14:53:31,707 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-04 14:53:31,707 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-04 14:53:31,707 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-04 14:53:31,707 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-04 14:53:31,708 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-04 14:53:31,708 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-04 14:53:31,708 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-04 14:53:31,709 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-04 14:53:31,836 INFO L244 CfgBuilder]: Building ICFG [2024-06-04 14:53:31,837 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-04 14:53:32,261 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-04 14:53:32,261 INFO L293 CfgBuilder]: Performing block encoding [2024-06-04 14:53:32,400 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-04 14:53:32,401 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-04 14:53:32,401 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.06 02:53:32 BoogieIcfgContainer [2024-06-04 14:53:32,401 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-04 14:53:32,404 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-04 14:53:32,404 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-04 14:53:32,406 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-04 14:53:32,407 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.06 02:53:30" (1/4) ... [2024-06-04 14:53:32,407 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28088d17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.06 02:53:32, skipping insertion in model container [2024-06-04 14:53:32,407 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 02:53:30" (2/4) ... [2024-06-04 14:53:32,407 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28088d17 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 04.06 02:53:32, skipping insertion in model container [2024-06-04 14:53:32,408 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:53:31" (3/4) ... [2024-06-04 14:53:32,408 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28088d17 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 04.06 02:53:32, skipping insertion in model container [2024-06-04 14:53:32,408 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.06 02:53:32" (4/4) ... [2024-06-04 14:53:32,409 INFO L112 eAbstractionObserver]: Analyzing ICFG mix020.opt.i [2024-06-04 14:53:32,422 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-04 14:53:32,422 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-04 14:53:32,422 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-04 14:53:32,466 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-04 14:53:32,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 66 places, 53 transitions, 122 flow [2024-06-04 14:53:32,533 INFO L124 PetriNetUnfolderBase]: 0/49 cut-off events. [2024-06-04 14:53:32,533 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-04 14:53:32,536 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 80 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. [2024-06-04 14:53:32,536 INFO L82 GeneralOperation]: Start removeDead. Operand has 66 places, 53 transitions, 122 flow [2024-06-04 14:53:32,539 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 56 places, 43 transitions, 98 flow [2024-06-04 14:53:32,550 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-04 14:53:32,587 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;@15f6ca7f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-04 14:53:32,587 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-04 14:53:32,593 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-04 14:53:32,593 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-04 14:53:32,593 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-04 14:53:32,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:53:32,594 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-04 14:53:32,594 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)] === [2024-06-04 14:53:32,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:53:32,598 INFO L85 PathProgramCache]: Analyzing trace with hash -13335953, now seen corresponding path program 1 times [2024-06-04 14:53:32,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:53:32,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263392588] [2024-06-04 14:53:32,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:53:32,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:53:32,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:53:33,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:53:33,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:53:33,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263392588] [2024-06-04 14:53:33,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263392588] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:53:33,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:53:33,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-04 14:53:33,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606838705] [2024-06-04 14:53:33,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:53:33,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-04 14:53:33,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:53:33,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-04 14:53:33,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-04 14:53:33,855 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 53 [2024-06-04 14:53:33,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 43 transitions, 98 flow. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:33,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:53:33,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 53 [2024-06-04 14:53:33,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:53:34,922 INFO L124 PetriNetUnfolderBase]: 6197/8802 cut-off events. [2024-06-04 14:53:34,922 INFO L125 PetriNetUnfolderBase]: For 121/121 co-relation queries the response was YES. [2024-06-04 14:53:34,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17550 conditions, 8802 events. 6197/8802 cut-off events. For 121/121 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 49888 event pairs, 4558 based on Foata normal form. 1/8524 useless extension candidates. Maximal degree in co-relation 17534. Up to 8479 conditions per place. [2024-06-04 14:53:34,976 INFO L140 encePairwiseOnDemand]: 44/53 looper letters, 43 selfloop transitions, 5 changer transitions 0/57 dead transitions. [2024-06-04 14:53:34,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 57 transitions, 231 flow [2024-06-04 14:53:34,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-04 14:53:34,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-04 14:53:34,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 100 transitions. [2024-06-04 14:53:34,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6289308176100629 [2024-06-04 14:53:34,988 INFO L175 Difference]: Start difference. First operand has 56 places, 43 transitions, 98 flow. Second operand 3 states and 100 transitions. [2024-06-04 14:53:34,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 57 transitions, 231 flow [2024-06-04 14:53:34,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 57 transitions, 224 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-04 14:53:34,995 INFO L231 Difference]: Finished difference. Result has 55 places, 47 transitions, 133 flow [2024-06-04 14:53:34,997 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} [2024-06-04 14:53:34,999 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -1 predicate places. [2024-06-04 14:53:35,000 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 47 transitions, 133 flow [2024-06-04 14:53:35,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:35,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:53:35,001 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:53:35,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-04 14:53:35,001 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)] === [2024-06-04 14:53:35,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:53:35,002 INFO L85 PathProgramCache]: Analyzing trace with hash 69080206, now seen corresponding path program 1 times [2024-06-04 14:53:35,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:53:35,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613729990] [2024-06-04 14:53:35,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:53:35,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:53:35,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:53:35,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:53:35,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:53:35,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613729990] [2024-06-04 14:53:35,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613729990] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:53:35,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:53:35,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-04 14:53:35,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562219965] [2024-06-04 14:53:35,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:53:35,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-04 14:53:35,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:53:35,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-04 14:53:35,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-04 14:53:35,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-04 14:53:35,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 47 transitions, 133 flow. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:35,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:53:35,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-04 14:53:35,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:53:37,266 INFO L124 PetriNetUnfolderBase]: 7092/9843 cut-off events. [2024-06-04 14:53:37,267 INFO L125 PetriNetUnfolderBase]: For 2062/2062 co-relation queries the response was YES. [2024-06-04 14:53:37,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22572 conditions, 9843 events. 7092/9843 cut-off events. For 2062/2062 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 54305 event pairs, 4490 based on Foata normal form. 4/9822 useless extension candidates. Maximal degree in co-relation 22557. Up to 9649 conditions per place. [2024-06-04 14:53:37,337 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 54 selfloop transitions, 9 changer transitions 0/71 dead transitions. [2024-06-04 14:53:37,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 71 transitions, 325 flow [2024-06-04 14:53:37,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-04 14:53:37,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-04 14:53:37,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 127 transitions. [2024-06-04 14:53:37,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5990566037735849 [2024-06-04 14:53:37,340 INFO L175 Difference]: Start difference. First operand has 55 places, 47 transitions, 133 flow. Second operand 4 states and 127 transitions. [2024-06-04 14:53:37,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 71 transitions, 325 flow [2024-06-04 14:53:37,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 71 transitions, 320 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-04 14:53:37,342 INFO L231 Difference]: Finished difference. Result has 58 places, 51 transitions, 181 flow [2024-06-04 14:53:37,342 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} [2024-06-04 14:53:37,343 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 2 predicate places. [2024-06-04 14:53:37,343 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 51 transitions, 181 flow [2024-06-04 14:53:37,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:37,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:53:37,344 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:53:37,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-04 14:53:37,344 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)] === [2024-06-04 14:53:37,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:53:37,345 INFO L85 PathProgramCache]: Analyzing trace with hash 680048381, now seen corresponding path program 1 times [2024-06-04 14:53:37,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:53:37,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954435135] [2024-06-04 14:53:37,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:53:37,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:53:37,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:53:38,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:53:38,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:53:38,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954435135] [2024-06-04 14:53:38,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954435135] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:53:38,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:53:38,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:53:38,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463684568] [2024-06-04 14:53:38,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:53:38,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:53:38,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:53:38,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:53:38,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:53:38,288 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-04 14:53:38,288 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 51 transitions, 181 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:38,289 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:53:38,289 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-04 14:53:38,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:53:39,614 INFO L124 PetriNetUnfolderBase]: 9006/12420 cut-off events. [2024-06-04 14:53:39,615 INFO L125 PetriNetUnfolderBase]: For 6995/6995 co-relation queries the response was YES. [2024-06-04 14:53:39,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31565 conditions, 12420 events. 9006/12420 cut-off events. For 6995/6995 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 66855 event pairs, 4478 based on Foata normal form. 8/12395 useless extension candidates. Maximal degree in co-relation 31548. Up to 12137 conditions per place. [2024-06-04 14:53:39,679 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 72 selfloop transitions, 16 changer transitions 0/95 dead transitions. [2024-06-04 14:53:39,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 95 transitions, 490 flow [2024-06-04 14:53:39,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:53:39,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:53:39,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 176 transitions. [2024-06-04 14:53:39,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5534591194968553 [2024-06-04 14:53:39,685 INFO L175 Difference]: Start difference. First operand has 58 places, 51 transitions, 181 flow. Second operand 6 states and 176 transitions. [2024-06-04 14:53:39,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 95 transitions, 490 flow [2024-06-04 14:53:39,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 95 transitions, 462 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-04 14:53:39,689 INFO L231 Difference]: Finished difference. Result has 62 places, 57 transitions, 243 flow [2024-06-04 14:53:39,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=243, PETRI_PLACES=62, PETRI_TRANSITIONS=57} [2024-06-04 14:53:39,691 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 6 predicate places. [2024-06-04 14:53:39,691 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 57 transitions, 243 flow [2024-06-04 14:53:39,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:39,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:53:39,691 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:53:39,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-04 14:53:39,692 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:53:39,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:53:39,692 INFO L85 PathProgramCache]: Analyzing trace with hash 278349518, now seen corresponding path program 1 times [2024-06-04 14:53:39,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:53:39,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612461997] [2024-06-04 14:53:39,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:53:39,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:53:39,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:53:40,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:53:40,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:53:40,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612461997] [2024-06-04 14:53:40,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612461997] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:53:40,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:53:40,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:53:40,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494390704] [2024-06-04 14:53:40,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:53:40,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:53:40,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:53:40,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:53:40,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:53:40,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-04 14:53:40,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 57 transitions, 243 flow. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:40,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:53:40,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-04 14:53:40,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:53:42,083 INFO L124 PetriNetUnfolderBase]: 7847/11081 cut-off events. [2024-06-04 14:53:42,083 INFO L125 PetriNetUnfolderBase]: For 11293/11293 co-relation queries the response was YES. [2024-06-04 14:53:42,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30882 conditions, 11081 events. 7847/11081 cut-off events. For 11293/11293 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 61333 event pairs, 4266 based on Foata normal form. 3/10906 useless extension candidates. Maximal degree in co-relation 30863. Up to 10669 conditions per place. [2024-06-04 14:53:42,146 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 60 selfloop transitions, 10 changer transitions 0/78 dead transitions. [2024-06-04 14:53:42,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 78 transitions, 449 flow [2024-06-04 14:53:42,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 14:53:42,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 14:53:42,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 132 transitions. [2024-06-04 14:53:42,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4981132075471698 [2024-06-04 14:53:42,147 INFO L175 Difference]: Start difference. First operand has 62 places, 57 transitions, 243 flow. Second operand 5 states and 132 transitions. [2024-06-04 14:53:42,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 78 transitions, 449 flow [2024-06-04 14:53:42,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 78 transitions, 411 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-04 14:53:42,155 INFO L231 Difference]: Finished difference. Result has 64 places, 61 transitions, 266 flow [2024-06-04 14:53:42,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=205, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=266, PETRI_PLACES=64, PETRI_TRANSITIONS=61} [2024-06-04 14:53:42,156 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 8 predicate places. [2024-06-04 14:53:42,156 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 61 transitions, 266 flow [2024-06-04 14:53:42,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:42,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:53:42,157 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:53:42,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-04 14:53:42,157 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)] === [2024-06-04 14:53:42,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:53:42,157 INFO L85 PathProgramCache]: Analyzing trace with hash 69288294, now seen corresponding path program 1 times [2024-06-04 14:53:42,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:53:42,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305618075] [2024-06-04 14:53:42,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:53:42,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:53:42,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:53:43,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:53:43,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:53:43,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305618075] [2024-06-04 14:53:43,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305618075] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:53:43,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:53:43,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:53:43,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413997542] [2024-06-04 14:53:43,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:53:43,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:53:43,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:53:43,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:53:43,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:53:43,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-04 14:53:43,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 61 transitions, 266 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 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) [2024-06-04 14:53:43,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:53:43,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-04 14:53:43,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:53:44,353 INFO L124 PetriNetUnfolderBase]: 7880/11287 cut-off events. [2024-06-04 14:53:44,354 INFO L125 PetriNetUnfolderBase]: For 17923/17923 co-relation queries the response was YES. [2024-06-04 14:53:44,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33940 conditions, 11287 events. 7880/11287 cut-off events. For 17923/17923 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 63984 event pairs, 4072 based on Foata normal form. 7/11260 useless extension candidates. Maximal degree in co-relation 33919. Up to 10583 conditions per place. [2024-06-04 14:53:44,413 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 76 selfloop transitions, 22 changer transitions 0/106 dead transitions. [2024-06-04 14:53:44,413 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 106 transitions, 650 flow [2024-06-04 14:53:44,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:53:44,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:53:44,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 168 transitions. [2024-06-04 14:53:44,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5283018867924528 [2024-06-04 14:53:44,414 INFO L175 Difference]: Start difference. First operand has 64 places, 61 transitions, 266 flow. Second operand 6 states and 168 transitions. [2024-06-04 14:53:44,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 106 transitions, 650 flow [2024-06-04 14:53:44,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 106 transitions, 621 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-04 14:53:44,418 INFO L231 Difference]: Finished difference. Result has 69 places, 75 transitions, 407 flow [2024-06-04 14:53:44,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=237, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=407, PETRI_PLACES=69, PETRI_TRANSITIONS=75} [2024-06-04 14:53:44,419 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 13 predicate places. [2024-06-04 14:53:44,419 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 75 transitions, 407 flow [2024-06-04 14:53:44,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 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) [2024-06-04 14:53:44,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:53:44,420 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:53:44,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-04 14:53:44,420 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)] === [2024-06-04 14:53:44,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:53:44,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1109658049, now seen corresponding path program 1 times [2024-06-04 14:53:44,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:53:44,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129850791] [2024-06-04 14:53:44,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:53:44,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:53:44,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:53:45,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:53:45,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:53:45,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129850791] [2024-06-04 14:53:45,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129850791] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:53:45,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:53:45,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:53:45,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473122198] [2024-06-04 14:53:45,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:53:45,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:53:45,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:53:45,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:53:45,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:53:45,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-04 14:53:45,324 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 75 transitions, 407 flow. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:45,324 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:53:45,324 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-04 14:53:45,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:53:46,744 INFO L124 PetriNetUnfolderBase]: 9052/12513 cut-off events. [2024-06-04 14:53:46,744 INFO L125 PetriNetUnfolderBase]: For 34286/34298 co-relation queries the response was YES. [2024-06-04 14:53:46,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43475 conditions, 12513 events. 9052/12513 cut-off events. For 34286/34298 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 67339 event pairs, 4664 based on Foata normal form. 11/12511 useless extension candidates. Maximal degree in co-relation 43451. Up to 12214 conditions per place. [2024-06-04 14:53:46,804 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 85 selfloop transitions, 21 changer transitions 0/113 dead transitions. [2024-06-04 14:53:46,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 113 transitions, 793 flow [2024-06-04 14:53:46,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:53:46,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:53:46,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 160 transitions. [2024-06-04 14:53:46,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5031446540880503 [2024-06-04 14:53:46,805 INFO L175 Difference]: Start difference. First operand has 69 places, 75 transitions, 407 flow. Second operand 6 states and 160 transitions. [2024-06-04 14:53:46,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 113 transitions, 793 flow [2024-06-04 14:53:46,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 113 transitions, 771 flow, removed 10 selfloop flow, removed 1 redundant places. [2024-06-04 14:53:46,814 INFO L231 Difference]: Finished difference. Result has 74 places, 83 transitions, 514 flow [2024-06-04 14:53:46,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=385, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=514, PETRI_PLACES=74, PETRI_TRANSITIONS=83} [2024-06-04 14:53:46,816 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 18 predicate places. [2024-06-04 14:53:46,817 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 83 transitions, 514 flow [2024-06-04 14:53:46,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:46,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:53:46,817 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:53:46,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-04 14:53:46,817 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)] === [2024-06-04 14:53:46,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:53:46,818 INFO L85 PathProgramCache]: Analyzing trace with hash -2114949289, now seen corresponding path program 2 times [2024-06-04 14:53:46,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:53:46,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497167089] [2024-06-04 14:53:46,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:53:46,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:53:46,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:53:47,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:53:47,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:53:47,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497167089] [2024-06-04 14:53:47,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497167089] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:53:47,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:53:47,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:53:47,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767477806] [2024-06-04 14:53:47,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:53:47,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:53:47,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:53:47,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:53:47,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:53:47,688 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-04 14:53:47,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 83 transitions, 514 flow. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:47,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:53:47,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-04 14:53:47,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:53:49,125 INFO L124 PetriNetUnfolderBase]: 9043/12502 cut-off events. [2024-06-04 14:53:49,125 INFO L125 PetriNetUnfolderBase]: For 46031/46039 co-relation queries the response was YES. [2024-06-04 14:53:49,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46591 conditions, 12502 events. 9043/12502 cut-off events. For 46031/46039 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 67355 event pairs, 4667 based on Foata normal form. 9/12498 useless extension candidates. Maximal degree in co-relation 46564. Up to 12205 conditions per place. [2024-06-04 14:53:49,211 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 79 selfloop transitions, 21 changer transitions 0/107 dead transitions. [2024-06-04 14:53:49,212 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 107 transitions, 776 flow [2024-06-04 14:53:49,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:53:49,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:53:49,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-04 14:53:49,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48427672955974843 [2024-06-04 14:53:49,213 INFO L175 Difference]: Start difference. First operand has 74 places, 83 transitions, 514 flow. Second operand 6 states and 154 transitions. [2024-06-04 14:53:49,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 107 transitions, 776 flow [2024-06-04 14:53:49,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 107 transitions, 718 flow, removed 24 selfloop flow, removed 2 redundant places. [2024-06-04 14:53:49,252 INFO L231 Difference]: Finished difference. Result has 78 places, 83 transitions, 509 flow [2024-06-04 14:53:49,252 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=456, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=509, PETRI_PLACES=78, PETRI_TRANSITIONS=83} [2024-06-04 14:53:49,254 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 22 predicate places. [2024-06-04 14:53:49,254 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 83 transitions, 509 flow [2024-06-04 14:53:49,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:49,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:53:49,254 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:53:49,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-04 14:53:49,255 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)] === [2024-06-04 14:53:49,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:53:49,255 INFO L85 PathProgramCache]: Analyzing trace with hash 136926087, now seen corresponding path program 1 times [2024-06-04 14:53:49,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:53:49,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404100585] [2024-06-04 14:53:49,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:53:49,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:53:49,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:53:50,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:53:50,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:53:50,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404100585] [2024-06-04 14:53:50,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404100585] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:53:50,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:53:50,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:53:50,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775471397] [2024-06-04 14:53:50,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:53:50,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:53:50,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:53:50,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:53:50,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:53:50,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-04 14:53:50,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 83 transitions, 509 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:50,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:53:50,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-04 14:53:50,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:53:52,165 INFO L124 PetriNetUnfolderBase]: 9134/12640 cut-off events. [2024-06-04 14:53:52,165 INFO L125 PetriNetUnfolderBase]: For 51584/51588 co-relation queries the response was YES. [2024-06-04 14:53:52,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47523 conditions, 12640 events. 9134/12640 cut-off events. For 51584/51588 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 68046 event pairs, 4657 based on Foata normal form. 7/12636 useless extension candidates. Maximal degree in co-relation 47494. Up to 12307 conditions per place. [2024-06-04 14:53:52,287 INFO L140 encePairwiseOnDemand]: 38/53 looper letters, 103 selfloop transitions, 32 changer transitions 0/142 dead transitions. [2024-06-04 14:53:52,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 142 transitions, 1006 flow [2024-06-04 14:53:52,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:53:52,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:53:52,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-04 14:53:52,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4882075471698113 [2024-06-04 14:53:52,289 INFO L175 Difference]: Start difference. First operand has 78 places, 83 transitions, 509 flow. Second operand 8 states and 207 transitions. [2024-06-04 14:53:52,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 142 transitions, 1006 flow [2024-06-04 14:53:52,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 142 transitions, 932 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-04 14:53:52,332 INFO L231 Difference]: Finished difference. Result has 82 places, 102 transitions, 667 flow [2024-06-04 14:53:52,332 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=451, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=667, PETRI_PLACES=82, PETRI_TRANSITIONS=102} [2024-06-04 14:53:52,332 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 26 predicate places. [2024-06-04 14:53:52,333 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 102 transitions, 667 flow [2024-06-04 14:53:52,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:52,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:53:52,333 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:53:52,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-04 14:53:52,333 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:53:52,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:53:52,334 INFO L85 PathProgramCache]: Analyzing trace with hash -1447738305, now seen corresponding path program 2 times [2024-06-04 14:53:52,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:53:52,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306423217] [2024-06-04 14:53:52,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:53:52,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:53:52,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:53:53,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:53:53,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:53:53,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306423217] [2024-06-04 14:53:53,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306423217] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:53:53,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:53:53,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:53:53,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880380339] [2024-06-04 14:53:53,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:53:53,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:53:53,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:53:53,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:53:53,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:53:53,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-04 14:53:53,490 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 102 transitions, 667 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:53,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:53:53,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-04 14:53:53,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:53:55,068 INFO L124 PetriNetUnfolderBase]: 9156/12673 cut-off events. [2024-06-04 14:53:55,069 INFO L125 PetriNetUnfolderBase]: For 65779/65787 co-relation queries the response was YES. [2024-06-04 14:53:55,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51085 conditions, 12673 events. 9156/12673 cut-off events. For 65779/65787 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 68142 event pairs, 4503 based on Foata normal form. 11/12672 useless extension candidates. Maximal degree in co-relation 51054. Up to 12314 conditions per place. [2024-06-04 14:53:55,170 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 103 selfloop transitions, 34 changer transitions 0/144 dead transitions. [2024-06-04 14:53:55,170 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 144 transitions, 1117 flow [2024-06-04 14:53:55,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:53:55,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:53:55,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-04 14:53:55,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49056603773584906 [2024-06-04 14:53:55,172 INFO L175 Difference]: Start difference. First operand has 82 places, 102 transitions, 667 flow. Second operand 7 states and 182 transitions. [2024-06-04 14:53:55,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 144 transitions, 1117 flow [2024-06-04 14:53:55,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 144 transitions, 1053 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-04 14:53:55,221 INFO L231 Difference]: Finished difference. Result has 86 places, 106 transitions, 744 flow [2024-06-04 14:53:55,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=603, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=744, PETRI_PLACES=86, PETRI_TRANSITIONS=106} [2024-06-04 14:53:55,222 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 30 predicate places. [2024-06-04 14:53:55,222 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 106 transitions, 744 flow [2024-06-04 14:53:55,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:55,222 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:53:55,222 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:53:55,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-04 14:53:55,222 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:53:55,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:53:55,223 INFO L85 PathProgramCache]: Analyzing trace with hash -39660143, now seen corresponding path program 1 times [2024-06-04 14:53:55,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:53:55,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684287223] [2024-06-04 14:53:55,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:53:55,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:53:55,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:53:56,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:53:56,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:53:56,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684287223] [2024-06-04 14:53:56,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684287223] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:53:56,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:53:56,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:53:56,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980534857] [2024-06-04 14:53:56,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:53:56,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:53:56,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:53:56,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:53:56,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:53:56,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-04 14:53:56,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 106 transitions, 744 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:56,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:53:56,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-04 14:53:56,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:53:58,050 INFO L124 PetriNetUnfolderBase]: 9312/12891 cut-off events. [2024-06-04 14:53:58,051 INFO L125 PetriNetUnfolderBase]: For 83665/83673 co-relation queries the response was YES. [2024-06-04 14:53:58,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55163 conditions, 12891 events. 9312/12891 cut-off events. For 83665/83673 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 69299 event pairs, 4186 based on Foata normal form. 15/12886 useless extension candidates. Maximal degree in co-relation 55131. Up to 12140 conditions per place. [2024-06-04 14:53:58,151 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 120 selfloop transitions, 43 changer transitions 0/170 dead transitions. [2024-06-04 14:53:58,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 170 transitions, 1500 flow [2024-06-04 14:53:58,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:53:58,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:53:58,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 199 transitions. [2024-06-04 14:53:58,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5363881401617251 [2024-06-04 14:53:58,154 INFO L175 Difference]: Start difference. First operand has 86 places, 106 transitions, 744 flow. Second operand 7 states and 199 transitions. [2024-06-04 14:53:58,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 170 transitions, 1500 flow [2024-06-04 14:53:58,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 170 transitions, 1369 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-06-04 14:53:58,211 INFO L231 Difference]: Finished difference. Result has 90 places, 121 transitions, 904 flow [2024-06-04 14:53:58,211 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=641, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=904, PETRI_PLACES=90, PETRI_TRANSITIONS=121} [2024-06-04 14:53:58,211 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 34 predicate places. [2024-06-04 14:53:58,212 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 121 transitions, 904 flow [2024-06-04 14:53:58,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:58,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:53:58,212 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:53:58,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-04 14:53:58,212 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)] === [2024-06-04 14:53:58,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:53:58,213 INFO L85 PathProgramCache]: Analyzing trace with hash -1364310637, now seen corresponding path program 3 times [2024-06-04 14:53:58,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:53:58,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894127920] [2024-06-04 14:53:58,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:53:58,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:53:58,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:53:59,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:53:59,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:53:59,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894127920] [2024-06-04 14:53:59,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894127920] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:53:59,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:53:59,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:53:59,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067350420] [2024-06-04 14:53:59,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:53:59,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:53:59,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:53:59,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:53:59,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:53:59,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-04 14:53:59,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 121 transitions, 904 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:59,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:53:59,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-04 14:53:59,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:00,778 INFO L124 PetriNetUnfolderBase]: 9334/12944 cut-off events. [2024-06-04 14:54:00,779 INFO L125 PetriNetUnfolderBase]: For 89715/89729 co-relation queries the response was YES. [2024-06-04 14:54:00,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57610 conditions, 12944 events. 9334/12944 cut-off events. For 89715/89729 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 69857 event pairs, 4333 based on Foata normal form. 11/12939 useless extension candidates. Maximal degree in co-relation 57575. Up to 12464 conditions per place. [2024-06-04 14:54:00,869 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 108 selfloop transitions, 50 changer transitions 0/165 dead transitions. [2024-06-04 14:54:00,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 165 transitions, 1492 flow [2024-06-04 14:54:00,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:54:00,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:54:00,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 186 transitions. [2024-06-04 14:54:00,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5013477088948787 [2024-06-04 14:54:00,878 INFO L175 Difference]: Start difference. First operand has 90 places, 121 transitions, 904 flow. Second operand 7 states and 186 transitions. [2024-06-04 14:54:00,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 165 transitions, 1492 flow [2024-06-04 14:54:00,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 165 transitions, 1424 flow, removed 25 selfloop flow, removed 2 redundant places. [2024-06-04 14:54:00,933 INFO L231 Difference]: Finished difference. Result has 95 places, 129 transitions, 1063 flow [2024-06-04 14:54:00,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=836, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1063, PETRI_PLACES=95, PETRI_TRANSITIONS=129} [2024-06-04 14:54:00,934 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 39 predicate places. [2024-06-04 14:54:00,934 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 129 transitions, 1063 flow [2024-06-04 14:54:00,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:00,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:00,934 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:00,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-04 14:54:00,935 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)] === [2024-06-04 14:54:00,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:00,935 INFO L85 PathProgramCache]: Analyzing trace with hash 938259967, now seen corresponding path program 2 times [2024-06-04 14:54:00,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:00,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502035359] [2024-06-04 14:54:00,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:00,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:00,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:01,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:01,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:01,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502035359] [2024-06-04 14:54:01,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502035359] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:01,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:01,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:54:01,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549370841] [2024-06-04 14:54:01,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:01,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:54:01,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:01,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:54:01,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:54:01,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-04 14:54:01,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 129 transitions, 1063 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:01,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:01,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-04 14:54:01,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:03,508 INFO L124 PetriNetUnfolderBase]: 9444/13098 cut-off events. [2024-06-04 14:54:03,508 INFO L125 PetriNetUnfolderBase]: For 109587/109607 co-relation queries the response was YES. [2024-06-04 14:54:03,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61466 conditions, 13098 events. 9444/13098 cut-off events. For 109587/109607 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 70692 event pairs, 4143 based on Foata normal form. 21/13104 useless extension candidates. Maximal degree in co-relation 61429. Up to 12270 conditions per place. [2024-06-04 14:54:03,612 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 122 selfloop transitions, 59 changer transitions 0/188 dead transitions. [2024-06-04 14:54:03,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 188 transitions, 1854 flow [2024-06-04 14:54:03,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:54:03,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:54:03,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 195 transitions. [2024-06-04 14:54:03,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5256064690026954 [2024-06-04 14:54:03,614 INFO L175 Difference]: Start difference. First operand has 95 places, 129 transitions, 1063 flow. Second operand 7 states and 195 transitions. [2024-06-04 14:54:03,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 188 transitions, 1854 flow [2024-06-04 14:54:03,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 188 transitions, 1775 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-04 14:54:03,707 INFO L231 Difference]: Finished difference. Result has 100 places, 143 transitions, 1300 flow [2024-06-04 14:54:03,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=984, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1300, PETRI_PLACES=100, PETRI_TRANSITIONS=143} [2024-06-04 14:54:03,707 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 44 predicate places. [2024-06-04 14:54:03,707 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 143 transitions, 1300 flow [2024-06-04 14:54:03,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:03,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:03,708 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:03,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-04 14:54:03,708 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:54:03,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:03,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1270602135, now seen corresponding path program 4 times [2024-06-04 14:54:03,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:03,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872695892] [2024-06-04 14:54:03,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:03,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:03,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:04,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:04,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:04,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872695892] [2024-06-04 14:54:04,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872695892] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:04,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:04,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:54:04,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810375473] [2024-06-04 14:54:04,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:04,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:54:04,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:04,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:54:04,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:54:04,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-04 14:54:04,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 143 transitions, 1300 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:04,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:04,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-04 14:54:04,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:06,438 INFO L124 PetriNetUnfolderBase]: 9435/13096 cut-off events. [2024-06-04 14:54:06,438 INFO L125 PetriNetUnfolderBase]: For 129109/129113 co-relation queries the response was YES. [2024-06-04 14:54:06,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64325 conditions, 13096 events. 9435/13096 cut-off events. For 129109/129113 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 70825 event pairs, 4356 based on Foata normal form. 3/13073 useless extension candidates. Maximal degree in co-relation 64285. Up to 12601 conditions per place. [2024-06-04 14:54:06,542 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 117 selfloop transitions, 50 changer transitions 0/174 dead transitions. [2024-06-04 14:54:06,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 174 transitions, 1732 flow [2024-06-04 14:54:06,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:54:06,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:54:06,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-04 14:54:06,544 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48517520215633425 [2024-06-04 14:54:06,544 INFO L175 Difference]: Start difference. First operand has 100 places, 143 transitions, 1300 flow. Second operand 7 states and 180 transitions. [2024-06-04 14:54:06,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 174 transitions, 1732 flow [2024-06-04 14:54:06,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 174 transitions, 1660 flow, removed 35 selfloop flow, removed 1 redundant places. [2024-06-04 14:54:06,661 INFO L231 Difference]: Finished difference. Result has 106 places, 143 transitions, 1339 flow [2024-06-04 14:54:06,661 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1228, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1339, PETRI_PLACES=106, PETRI_TRANSITIONS=143} [2024-06-04 14:54:06,661 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 50 predicate places. [2024-06-04 14:54:06,662 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 143 transitions, 1339 flow [2024-06-04 14:54:06,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:06,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:06,662 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:06,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-04 14:54:06,662 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)] === [2024-06-04 14:54:06,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:06,663 INFO L85 PathProgramCache]: Analyzing trace with hash -2133639001, now seen corresponding path program 3 times [2024-06-04 14:54:06,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:06,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142409296] [2024-06-04 14:54:06,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:06,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:06,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:07,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:07,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:07,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142409296] [2024-06-04 14:54:07,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142409296] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:07,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:07,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:54:07,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656969151] [2024-06-04 14:54:07,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:07,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:54:07,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:07,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:54:07,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:54:07,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-04 14:54:07,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 143 transitions, 1339 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:07,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:07,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-04 14:54:07,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:09,536 INFO L124 PetriNetUnfolderBase]: 9422/13070 cut-off events. [2024-06-04 14:54:09,537 INFO L125 PetriNetUnfolderBase]: For 133383/133403 co-relation queries the response was YES. [2024-06-04 14:54:09,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64072 conditions, 13070 events. 9422/13070 cut-off events. For 133383/133403 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 70478 event pairs, 4157 based on Foata normal form. 21/13076 useless extension candidates. Maximal degree in co-relation 64029. Up to 12251 conditions per place. [2024-06-04 14:54:09,645 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 126 selfloop transitions, 54 changer transitions 0/187 dead transitions. [2024-06-04 14:54:09,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 187 transitions, 1979 flow [2024-06-04 14:54:09,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:54:09,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:54:09,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 194 transitions. [2024-06-04 14:54:09,647 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.522911051212938 [2024-06-04 14:54:09,647 INFO L175 Difference]: Start difference. First operand has 106 places, 143 transitions, 1339 flow. Second operand 7 states and 194 transitions. [2024-06-04 14:54:09,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 187 transitions, 1979 flow [2024-06-04 14:54:09,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 187 transitions, 1823 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-04 14:54:09,748 INFO L231 Difference]: Finished difference. Result has 107 places, 143 transitions, 1304 flow [2024-06-04 14:54:09,748 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1183, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1304, PETRI_PLACES=107, PETRI_TRANSITIONS=143} [2024-06-04 14:54:09,749 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 51 predicate places. [2024-06-04 14:54:09,749 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 143 transitions, 1304 flow [2024-06-04 14:54:09,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:09,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:09,749 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:09,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-04 14:54:09,749 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)] === [2024-06-04 14:54:09,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:09,750 INFO L85 PathProgramCache]: Analyzing trace with hash -1270355871, now seen corresponding path program 1 times [2024-06-04 14:54:09,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:09,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486753484] [2024-06-04 14:54:09,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:09,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:09,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:10,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:10,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:10,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486753484] [2024-06-04 14:54:10,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486753484] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:10,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:10,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:54:10,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485773152] [2024-06-04 14:54:10,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:10,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:54:10,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:10,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:54:10,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:54:10,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-04 14:54:10,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 143 transitions, 1304 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:10,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:10,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-04 14:54:10,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:12,462 INFO L124 PetriNetUnfolderBase]: 8418/12114 cut-off events. [2024-06-04 14:54:12,463 INFO L125 PetriNetUnfolderBase]: For 129256/129258 co-relation queries the response was YES. [2024-06-04 14:54:12,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59491 conditions, 12114 events. 8418/12114 cut-off events. For 129256/129258 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 69032 event pairs, 3568 based on Foata normal form. 26/12111 useless extension candidates. Maximal degree in co-relation 59447. Up to 11139 conditions per place. [2024-06-04 14:54:12,581 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 156 selfloop transitions, 25 changer transitions 0/189 dead transitions. [2024-06-04 14:54:12,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 189 transitions, 1950 flow [2024-06-04 14:54:12,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:54:12,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:54:12,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 197 transitions. [2024-06-04 14:54:12,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5309973045822103 [2024-06-04 14:54:12,601 INFO L175 Difference]: Start difference. First operand has 107 places, 143 transitions, 1304 flow. Second operand 7 states and 197 transitions. [2024-06-04 14:54:12,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 189 transitions, 1950 flow [2024-06-04 14:54:12,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 189 transitions, 1813 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-04 14:54:12,757 INFO L231 Difference]: Finished difference. Result has 107 places, 146 transitions, 1284 flow [2024-06-04 14:54:12,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1167, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1284, PETRI_PLACES=107, PETRI_TRANSITIONS=146} [2024-06-04 14:54:12,758 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 51 predicate places. [2024-06-04 14:54:12,759 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 146 transitions, 1284 flow [2024-06-04 14:54:12,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:12,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:12,759 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:12,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-04 14:54:12,759 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:54:12,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:12,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1707059177, now seen corresponding path program 1 times [2024-06-04 14:54:12,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:12,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298616808] [2024-06-04 14:54:12,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:12,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:12,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:13,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:13,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:13,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298616808] [2024-06-04 14:54:13,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298616808] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:13,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:13,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:54:13,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653169014] [2024-06-04 14:54:13,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:13,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:54:13,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:13,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:54:13,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:54:13,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-04 14:54:13,500 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 146 transitions, 1284 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:13,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:13,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-04 14:54:13,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:14,882 INFO L124 PetriNetUnfolderBase]: 7960/11642 cut-off events. [2024-06-04 14:54:14,883 INFO L125 PetriNetUnfolderBase]: For 141110/141127 co-relation queries the response was YES. [2024-06-04 14:54:14,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58928 conditions, 11642 events. 7960/11642 cut-off events. For 141110/141127 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 68400 event pairs, 3697 based on Foata normal form. 19/11641 useless extension candidates. Maximal degree in co-relation 58885. Up to 10734 conditions per place. [2024-06-04 14:54:14,994 INFO L140 encePairwiseOnDemand]: 44/53 looper letters, 132 selfloop transitions, 10 changer transitions 0/161 dead transitions. [2024-06-04 14:54:14,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 161 transitions, 1614 flow [2024-06-04 14:54:14,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 14:54:14,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 14:54:14,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 133 transitions. [2024-06-04 14:54:14,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5018867924528302 [2024-06-04 14:54:14,996 INFO L175 Difference]: Start difference. First operand has 107 places, 146 transitions, 1284 flow. Second operand 5 states and 133 transitions. [2024-06-04 14:54:14,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 161 transitions, 1614 flow [2024-06-04 14:54:15,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 161 transitions, 1519 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-04 14:54:15,153 INFO L231 Difference]: Finished difference. Result has 107 places, 146 transitions, 1218 flow [2024-06-04 14:54:15,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1189, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1218, PETRI_PLACES=107, PETRI_TRANSITIONS=146} [2024-06-04 14:54:15,153 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 51 predicate places. [2024-06-04 14:54:15,153 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 146 transitions, 1218 flow [2024-06-04 14:54:15,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:15,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:15,154 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:15,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-04 14:54:15,154 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:54:15,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:15,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1233188261, now seen corresponding path program 1 times [2024-06-04 14:54:15,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:15,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771797675] [2024-06-04 14:54:15,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:15,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:15,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:16,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:16,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:16,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771797675] [2024-06-04 14:54:16,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771797675] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:16,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:16,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:54:16,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776143027] [2024-06-04 14:54:16,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:16,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:54:16,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:16,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:54:16,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:54:16,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-04 14:54:16,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 146 transitions, 1218 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:16,242 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:16,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-04 14:54:16,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:18,023 INFO L124 PetriNetUnfolderBase]: 9710/13533 cut-off events. [2024-06-04 14:54:18,023 INFO L125 PetriNetUnfolderBase]: For 181036/181044 co-relation queries the response was YES. [2024-06-04 14:54:18,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69483 conditions, 13533 events. 9710/13533 cut-off events. For 181036/181044 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 74023 event pairs, 4156 based on Foata normal form. 15/13542 useless extension candidates. Maximal degree in co-relation 69439. Up to 12842 conditions per place. [2024-06-04 14:54:18,154 INFO L140 encePairwiseOnDemand]: 39/53 looper letters, 161 selfloop transitions, 48 changer transitions 0/216 dead transitions. [2024-06-04 14:54:18,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 216 transitions, 2156 flow [2024-06-04 14:54:18,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:54:18,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:54:18,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 223 transitions. [2024-06-04 14:54:18,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5259433962264151 [2024-06-04 14:54:18,157 INFO L175 Difference]: Start difference. First operand has 107 places, 146 transitions, 1218 flow. Second operand 8 states and 223 transitions. [2024-06-04 14:54:18,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 216 transitions, 2156 flow [2024-06-04 14:54:18,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 216 transitions, 2127 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-04 14:54:18,291 INFO L231 Difference]: Finished difference. Result has 113 places, 160 transitions, 1513 flow [2024-06-04 14:54:18,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1189, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1513, PETRI_PLACES=113, PETRI_TRANSITIONS=160} [2024-06-04 14:54:18,292 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 57 predicate places. [2024-06-04 14:54:18,292 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 160 transitions, 1513 flow [2024-06-04 14:54:18,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:18,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:18,292 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:18,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-04 14:54:18,292 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:54:18,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:18,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1917600559, now seen corresponding path program 2 times [2024-06-04 14:54:18,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:18,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320794811] [2024-06-04 14:54:18,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:18,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:18,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:19,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:19,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:19,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320794811] [2024-06-04 14:54:19,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320794811] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:19,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:19,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:54:19,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117362521] [2024-06-04 14:54:19,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:19,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:54:19,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:19,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:54:19,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:54:19,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-04 14:54:19,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 160 transitions, 1513 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:19,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:19,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-04 14:54:19,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:21,450 INFO L124 PetriNetUnfolderBase]: 9943/13895 cut-off events. [2024-06-04 14:54:21,451 INFO L125 PetriNetUnfolderBase]: For 221105/221107 co-relation queries the response was YES. [2024-06-04 14:54:21,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76944 conditions, 13895 events. 9943/13895 cut-off events. For 221105/221107 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 76748 event pairs, 3981 based on Foata normal form. 7/13885 useless extension candidates. Maximal degree in co-relation 76898. Up to 12358 conditions per place. [2024-06-04 14:54:21,771 INFO L140 encePairwiseOnDemand]: 39/53 looper letters, 131 selfloop transitions, 98 changer transitions 0/236 dead transitions. [2024-06-04 14:54:21,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 236 transitions, 2749 flow [2024-06-04 14:54:21,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:54:21,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:54:21,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 231 transitions. [2024-06-04 14:54:21,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5448113207547169 [2024-06-04 14:54:21,773 INFO L175 Difference]: Start difference. First operand has 113 places, 160 transitions, 1513 flow. Second operand 8 states and 231 transitions. [2024-06-04 14:54:21,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 236 transitions, 2749 flow [2024-06-04 14:54:21,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 236 transitions, 2606 flow, removed 44 selfloop flow, removed 4 redundant places. [2024-06-04 14:54:21,955 INFO L231 Difference]: Finished difference. Result has 119 places, 179 transitions, 1916 flow [2024-06-04 14:54:21,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1370, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1916, PETRI_PLACES=119, PETRI_TRANSITIONS=179} [2024-06-04 14:54:21,955 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 63 predicate places. [2024-06-04 14:54:21,955 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 179 transitions, 1916 flow [2024-06-04 14:54:21,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:21,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:21,956 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:21,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-04 14:54:21,956 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:54:21,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:21,957 INFO L85 PathProgramCache]: Analyzing trace with hash -1229469191, now seen corresponding path program 3 times [2024-06-04 14:54:21,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:21,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162867492] [2024-06-04 14:54:21,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:21,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:21,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:22,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:22,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:22,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162867492] [2024-06-04 14:54:22,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162867492] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:22,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:22,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:54:22,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860064378] [2024-06-04 14:54:22,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:22,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:54:22,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:22,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:54:22,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:54:23,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-04 14:54:23,011 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 179 transitions, 1916 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:23,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:23,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-04 14:54:23,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:25,206 INFO L124 PetriNetUnfolderBase]: 9930/13879 cut-off events. [2024-06-04 14:54:25,207 INFO L125 PetriNetUnfolderBase]: For 262443/262445 co-relation queries the response was YES. [2024-06-04 14:54:25,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82528 conditions, 13879 events. 9930/13879 cut-off events. For 262443/262445 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 76624 event pairs, 3995 based on Foata normal form. 7/13869 useless extension candidates. Maximal degree in co-relation 82479. Up to 12351 conditions per place. [2024-06-04 14:54:25,324 INFO L140 encePairwiseOnDemand]: 39/53 looper letters, 136 selfloop transitions, 92 changer transitions 0/235 dead transitions. [2024-06-04 14:54:25,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 235 transitions, 2876 flow [2024-06-04 14:54:25,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:54:25,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:54:25,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 230 transitions. [2024-06-04 14:54:25,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5424528301886793 [2024-06-04 14:54:25,343 INFO L175 Difference]: Start difference. First operand has 119 places, 179 transitions, 1916 flow. Second operand 8 states and 230 transitions. [2024-06-04 14:54:25,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 235 transitions, 2876 flow [2024-06-04 14:54:25,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 235 transitions, 2722 flow, removed 68 selfloop flow, removed 2 redundant places. [2024-06-04 14:54:25,582 INFO L231 Difference]: Finished difference. Result has 125 places, 179 transitions, 1961 flow [2024-06-04 14:54:25,582 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1764, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1961, PETRI_PLACES=125, PETRI_TRANSITIONS=179} [2024-06-04 14:54:25,583 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 69 predicate places. [2024-06-04 14:54:25,583 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 179 transitions, 1961 flow [2024-06-04 14:54:25,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:25,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:25,583 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:25,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-04 14:54:25,583 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:54:25,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:25,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1715109641, now seen corresponding path program 4 times [2024-06-04 14:54:25,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:25,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004285731] [2024-06-04 14:54:25,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:25,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:25,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:26,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:26,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:26,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004285731] [2024-06-04 14:54:26,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004285731] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:26,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:26,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:54:26,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107165880] [2024-06-04 14:54:26,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:26,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:54:26,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:26,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:54:26,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:54:26,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-04 14:54:26,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 179 transitions, 1961 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:26,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:26,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-04 14:54:26,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:28,755 INFO L124 PetriNetUnfolderBase]: 10040/14053 cut-off events. [2024-06-04 14:54:28,756 INFO L125 PetriNetUnfolderBase]: For 271748/271752 co-relation queries the response was YES. [2024-06-04 14:54:28,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82484 conditions, 14053 events. 10040/14053 cut-off events. For 271748/271752 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 77838 event pairs, 3937 based on Foata normal form. 7/14037 useless extension candidates. Maximal degree in co-relation 82433. Up to 12451 conditions per place. [2024-06-04 14:54:28,882 INFO L140 encePairwiseOnDemand]: 39/53 looper letters, 118 selfloop transitions, 115 changer transitions 0/240 dead transitions. [2024-06-04 14:54:28,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 240 transitions, 3015 flow [2024-06-04 14:54:28,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:54:28,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:54:28,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 224 transitions. [2024-06-04 14:54:28,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5283018867924528 [2024-06-04 14:54:28,885 INFO L175 Difference]: Start difference. First operand has 125 places, 179 transitions, 1961 flow. Second operand 8 states and 224 transitions. [2024-06-04 14:54:28,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 240 transitions, 3015 flow [2024-06-04 14:54:29,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 240 transitions, 2758 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-04 14:54:29,144 INFO L231 Difference]: Finished difference. Result has 127 places, 190 transitions, 2207 flow [2024-06-04 14:54:29,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1720, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2207, PETRI_PLACES=127, PETRI_TRANSITIONS=190} [2024-06-04 14:54:29,145 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 71 predicate places. [2024-06-04 14:54:29,145 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 190 transitions, 2207 flow [2024-06-04 14:54:29,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:29,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:29,146 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:29,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-04 14:54:29,146 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)] === [2024-06-04 14:54:29,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:29,147 INFO L85 PathProgramCache]: Analyzing trace with hash -1718304349, now seen corresponding path program 5 times [2024-06-04 14:54:29,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:29,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746414813] [2024-06-04 14:54:29,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:29,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:29,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:30,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:30,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:30,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746414813] [2024-06-04 14:54:30,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746414813] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:30,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:30,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:54:30,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982086968] [2024-06-04 14:54:30,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:30,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:54:30,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:30,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:54:30,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:54:30,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-04 14:54:30,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 190 transitions, 2207 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:30,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:30,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-04 14:54:30,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:32,098 INFO L124 PetriNetUnfolderBase]: 10104/14163 cut-off events. [2024-06-04 14:54:32,098 INFO L125 PetriNetUnfolderBase]: For 301222/301236 co-relation queries the response was YES. [2024-06-04 14:54:32,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85508 conditions, 14163 events. 10104/14163 cut-off events. For 301222/301236 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 78648 event pairs, 3979 based on Foata normal form. 17/14157 useless extension candidates. Maximal degree in co-relation 85456. Up to 12510 conditions per place. [2024-06-04 14:54:32,261 INFO L140 encePairwiseOnDemand]: 39/53 looper letters, 135 selfloop transitions, 105 changer transitions 0/247 dead transitions. [2024-06-04 14:54:32,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 247 transitions, 3268 flow [2024-06-04 14:54:32,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:54:32,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:54:32,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 226 transitions. [2024-06-04 14:54:32,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5330188679245284 [2024-06-04 14:54:32,263 INFO L175 Difference]: Start difference. First operand has 127 places, 190 transitions, 2207 flow. Second operand 8 states and 226 transitions. [2024-06-04 14:54:32,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 247 transitions, 3268 flow [2024-06-04 14:54:32,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 247 transitions, 3142 flow, removed 46 selfloop flow, removed 3 redundant places. [2024-06-04 14:54:32,586 INFO L231 Difference]: Finished difference. Result has 132 places, 195 transitions, 2399 flow [2024-06-04 14:54:32,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2091, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2399, PETRI_PLACES=132, PETRI_TRANSITIONS=195} [2024-06-04 14:54:32,587 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 76 predicate places. [2024-06-04 14:54:32,587 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 195 transitions, 2399 flow [2024-06-04 14:54:32,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:32,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:32,588 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:32,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-04 14:54:32,588 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:54:32,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:32,588 INFO L85 PathProgramCache]: Analyzing trace with hash -1718298769, now seen corresponding path program 6 times [2024-06-04 14:54:32,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:32,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101235428] [2024-06-04 14:54:32,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:32,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:32,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:33,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:33,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:33,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101235428] [2024-06-04 14:54:33,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101235428] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:33,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:33,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:54:33,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259153643] [2024-06-04 14:54:33,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:33,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:54:33,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:33,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:54:33,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:54:33,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-04 14:54:33,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 195 transitions, 2399 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:33,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:33,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-04 14:54:33,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:35,671 INFO L124 PetriNetUnfolderBase]: 10091/14145 cut-off events. [2024-06-04 14:54:35,671 INFO L125 PetriNetUnfolderBase]: For 301032/301036 co-relation queries the response was YES. [2024-06-04 14:54:35,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84938 conditions, 14145 events. 10091/14145 cut-off events. For 301032/301036 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 78475 event pairs, 3972 based on Foata normal form. 7/14129 useless extension candidates. Maximal degree in co-relation 84884. Up to 12503 conditions per place. [2024-06-04 14:54:35,821 INFO L140 encePairwiseOnDemand]: 39/53 looper letters, 131 selfloop transitions, 106 changer transitions 0/244 dead transitions. [2024-06-04 14:54:35,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 244 transitions, 3255 flow [2024-06-04 14:54:35,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:54:35,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:54:35,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 224 transitions. [2024-06-04 14:54:35,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5283018867924528 [2024-06-04 14:54:35,823 INFO L175 Difference]: Start difference. First operand has 132 places, 195 transitions, 2399 flow. Second operand 8 states and 224 transitions. [2024-06-04 14:54:35,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 244 transitions, 3255 flow [2024-06-04 14:54:36,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 244 transitions, 2801 flow, removed 59 selfloop flow, removed 9 redundant places. [2024-06-04 14:54:36,434 INFO L231 Difference]: Finished difference. Result has 131 places, 195 transitions, 2169 flow [2024-06-04 14:54:36,435 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1945, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2169, PETRI_PLACES=131, PETRI_TRANSITIONS=195} [2024-06-04 14:54:36,435 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 75 predicate places. [2024-06-04 14:54:36,436 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 195 transitions, 2169 flow [2024-06-04 14:54:36,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:36,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:36,436 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:36,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-04 14:54:36,436 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:54:36,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:36,437 INFO L85 PathProgramCache]: Analyzing trace with hash 2137556344, now seen corresponding path program 1 times [2024-06-04 14:54:36,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:36,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104603730] [2024-06-04 14:54:36,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:36,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:36,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:37,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:37,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:37,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104603730] [2024-06-04 14:54:37,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104603730] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:37,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:37,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:54:37,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474833462] [2024-06-04 14:54:37,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:37,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:54:37,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:37,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:54:37,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:54:37,648 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-04 14:54:37,648 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 195 transitions, 2169 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:37,648 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:37,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-04 14:54:37,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:39,762 INFO L124 PetriNetUnfolderBase]: 10178/14256 cut-off events. [2024-06-04 14:54:39,763 INFO L125 PetriNetUnfolderBase]: For 318067/318075 co-relation queries the response was YES. [2024-06-04 14:54:39,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85545 conditions, 14256 events. 10178/14256 cut-off events. For 318067/318075 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 78940 event pairs, 3275 based on Foata normal form. 14/14267 useless extension candidates. Maximal degree in co-relation 85493. Up to 13554 conditions per place. [2024-06-04 14:54:39,897 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 208 selfloop transitions, 43 changer transitions 0/258 dead transitions. [2024-06-04 14:54:39,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 258 transitions, 3105 flow [2024-06-04 14:54:39,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:54:39,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:54:39,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 234 transitions. [2024-06-04 14:54:39,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49056603773584906 [2024-06-04 14:54:39,899 INFO L175 Difference]: Start difference. First operand has 131 places, 195 transitions, 2169 flow. Second operand 9 states and 234 transitions. [2024-06-04 14:54:39,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 258 transitions, 3105 flow [2024-06-04 14:54:40,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 258 transitions, 2797 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-04 14:54:40,180 INFO L231 Difference]: Finished difference. Result has 132 places, 201 transitions, 2091 flow [2024-06-04 14:54:40,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1861, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2091, PETRI_PLACES=132, PETRI_TRANSITIONS=201} [2024-06-04 14:54:40,180 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 76 predicate places. [2024-06-04 14:54:40,180 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 201 transitions, 2091 flow [2024-06-04 14:54:40,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:40,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:40,181 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:40,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-04 14:54:40,181 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)] === [2024-06-04 14:54:40,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:40,183 INFO L85 PathProgramCache]: Analyzing trace with hash 425865652, now seen corresponding path program 2 times [2024-06-04 14:54:40,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:40,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809815190] [2024-06-04 14:54:40,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:40,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:40,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:41,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:41,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:41,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809815190] [2024-06-04 14:54:41,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809815190] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:41,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:41,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:54:41,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090503112] [2024-06-04 14:54:41,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:41,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:54:41,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:41,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:54:41,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:54:41,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-04 14:54:41,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 201 transitions, 2091 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:41,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:41,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-04 14:54:41,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:43,813 INFO L124 PetriNetUnfolderBase]: 10308/14424 cut-off events. [2024-06-04 14:54:43,814 INFO L125 PetriNetUnfolderBase]: For 351636/351642 co-relation queries the response was YES. [2024-06-04 14:54:43,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87647 conditions, 14424 events. 10308/14424 cut-off events. For 351636/351642 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 79412 event pairs, 3901 based on Foata normal form. 12/14427 useless extension candidates. Maximal degree in co-relation 87596. Up to 13826 conditions per place. [2024-06-04 14:54:43,964 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 210 selfloop transitions, 51 changer transitions 0/268 dead transitions. [2024-06-04 14:54:43,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 268 transitions, 3129 flow [2024-06-04 14:54:43,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:54:43,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:54:43,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 220 transitions. [2024-06-04 14:54:43,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4612159329140461 [2024-06-04 14:54:43,966 INFO L175 Difference]: Start difference. First operand has 132 places, 201 transitions, 2091 flow. Second operand 9 states and 220 transitions. [2024-06-04 14:54:43,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 268 transitions, 3129 flow [2024-06-04 14:54:44,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 268 transitions, 2958 flow, removed 51 selfloop flow, removed 5 redundant places. [2024-06-04 14:54:44,384 INFO L231 Difference]: Finished difference. Result has 140 places, 228 transitions, 2490 flow [2024-06-04 14:54:44,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1970, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2490, PETRI_PLACES=140, PETRI_TRANSITIONS=228} [2024-06-04 14:54:44,385 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 84 predicate places. [2024-06-04 14:54:44,385 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 228 transitions, 2490 flow [2024-06-04 14:54:44,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:44,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:44,385 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:44,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-04 14:54:44,386 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)] === [2024-06-04 14:54:44,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:44,387 INFO L85 PathProgramCache]: Analyzing trace with hash -1137469550, now seen corresponding path program 3 times [2024-06-04 14:54:44,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:44,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160868824] [2024-06-04 14:54:44,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:44,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:44,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:45,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:45,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:45,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160868824] [2024-06-04 14:54:45,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160868824] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:45,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:45,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:54:45,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637163483] [2024-06-04 14:54:45,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:45,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:54:45,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:45,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:54:45,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:54:45,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-04 14:54:45,525 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 228 transitions, 2490 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:45,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:45,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-04 14:54:45,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:47,699 INFO L124 PetriNetUnfolderBase]: 10344/14475 cut-off events. [2024-06-04 14:54:47,699 INFO L125 PetriNetUnfolderBase]: For 373251/373262 co-relation queries the response was YES. [2024-06-04 14:54:47,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89080 conditions, 14475 events. 10344/14475 cut-off events. For 373251/373262 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 79600 event pairs, 3917 based on Foata normal form. 12/14482 useless extension candidates. Maximal degree in co-relation 89023. Up to 13765 conditions per place. [2024-06-04 14:54:47,834 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 190 selfloop transitions, 74 changer transitions 0/271 dead transitions. [2024-06-04 14:54:47,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 271 transitions, 3212 flow [2024-06-04 14:54:47,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:54:47,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:54:47,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-04 14:54:47,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4882075471698113 [2024-06-04 14:54:47,836 INFO L175 Difference]: Start difference. First operand has 140 places, 228 transitions, 2490 flow. Second operand 8 states and 207 transitions. [2024-06-04 14:54:47,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 271 transitions, 3212 flow [2024-06-04 14:54:48,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 271 transitions, 3134 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-04 14:54:48,291 INFO L231 Difference]: Finished difference. Result has 146 places, 231 transitions, 2646 flow [2024-06-04 14:54:48,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2412, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2646, PETRI_PLACES=146, PETRI_TRANSITIONS=231} [2024-06-04 14:54:48,291 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 90 predicate places. [2024-06-04 14:54:48,291 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 231 transitions, 2646 flow [2024-06-04 14:54:48,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:48,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:48,292 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:48,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-04 14:54:48,292 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:54:48,292 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:48,292 INFO L85 PathProgramCache]: Analyzing trace with hash 541341520, now seen corresponding path program 1 times [2024-06-04 14:54:48,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:48,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364132210] [2024-06-04 14:54:48,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:48,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:48,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:49,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:49,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:49,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364132210] [2024-06-04 14:54:49,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364132210] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:49,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:49,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:54:49,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491442710] [2024-06-04 14:54:49,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:49,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:54:49,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:49,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:54:49,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:54:49,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-04 14:54:49,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 231 transitions, 2646 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:49,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:49,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-04 14:54:49,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:51,688 INFO L124 PetriNetUnfolderBase]: 10541/14764 cut-off events. [2024-06-04 14:54:51,688 INFO L125 PetriNetUnfolderBase]: For 421869/421881 co-relation queries the response was YES. [2024-06-04 14:54:51,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93006 conditions, 14764 events. 10541/14764 cut-off events. For 421869/421881 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 81583 event pairs, 3818 based on Foata normal form. 38/14785 useless extension candidates. Maximal degree in co-relation 92947. Up to 13611 conditions per place. [2024-06-04 14:54:51,838 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 222 selfloop transitions, 62 changer transitions 0/291 dead transitions. [2024-06-04 14:54:51,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 291 transitions, 3754 flow [2024-06-04 14:54:51,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:54:51,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:54:51,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 226 transitions. [2024-06-04 14:54:51,840 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5330188679245284 [2024-06-04 14:54:51,840 INFO L175 Difference]: Start difference. First operand has 146 places, 231 transitions, 2646 flow. Second operand 8 states and 226 transitions. [2024-06-04 14:54:51,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 291 transitions, 3754 flow [2024-06-04 14:54:52,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 291 transitions, 3546 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-04 14:54:52,330 INFO L231 Difference]: Finished difference. Result has 148 places, 234 transitions, 2645 flow [2024-06-04 14:54:52,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2438, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2645, PETRI_PLACES=148, PETRI_TRANSITIONS=234} [2024-06-04 14:54:52,331 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 92 predicate places. [2024-06-04 14:54:52,331 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 234 transitions, 2645 flow [2024-06-04 14:54:52,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:52,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:52,332 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:52,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-04 14:54:52,332 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)] === [2024-06-04 14:54:52,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:52,332 INFO L85 PathProgramCache]: Analyzing trace with hash -676627564, now seen corresponding path program 1 times [2024-06-04 14:54:52,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:52,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818813863] [2024-06-04 14:54:52,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:52,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:52,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:53,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:53,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:53,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818813863] [2024-06-04 14:54:53,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818813863] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:53,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:53,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:54:53,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727936802] [2024-06-04 14:54:53,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:53,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:54:53,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:53,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:54:53,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:54:53,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-04 14:54:53,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 234 transitions, 2645 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:53,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:53,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-04 14:54:53,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:55,322 INFO L124 PetriNetUnfolderBase]: 9994/14230 cut-off events. [2024-06-04 14:54:55,322 INFO L125 PetriNetUnfolderBase]: For 442502/442567 co-relation queries the response was YES. [2024-06-04 14:54:55,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92720 conditions, 14230 events. 9994/14230 cut-off events. For 442502/442567 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 81275 event pairs, 3817 based on Foata normal form. 49/14265 useless extension candidates. Maximal degree in co-relation 92660. Up to 13283 conditions per place. [2024-06-04 14:54:55,462 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 193 selfloop transitions, 54 changer transitions 0/268 dead transitions. [2024-06-04 14:54:55,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 268 transitions, 3416 flow [2024-06-04 14:54:55,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:54:55,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:54:55,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 163 transitions. [2024-06-04 14:54:55,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5125786163522013 [2024-06-04 14:54:55,463 INFO L175 Difference]: Start difference. First operand has 148 places, 234 transitions, 2645 flow. Second operand 6 states and 163 transitions. [2024-06-04 14:54:55,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 268 transitions, 3416 flow [2024-06-04 14:54:56,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 268 transitions, 3239 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-04 14:54:56,046 INFO L231 Difference]: Finished difference. Result has 148 places, 241 transitions, 2694 flow [2024-06-04 14:54:56,047 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2474, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2694, PETRI_PLACES=148, PETRI_TRANSITIONS=241} [2024-06-04 14:54:56,047 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 92 predicate places. [2024-06-04 14:54:56,047 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 241 transitions, 2694 flow [2024-06-04 14:54:56,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:56,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:56,048 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:56,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-04 14:54:56,048 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:54:56,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:56,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1277912344, now seen corresponding path program 4 times [2024-06-04 14:54:56,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:56,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786678203] [2024-06-04 14:54:56,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:56,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:56,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:57,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:57,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:57,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786678203] [2024-06-04 14:54:57,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786678203] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:57,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:57,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:54:57,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655297207] [2024-06-04 14:54:57,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:57,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:54:57,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:57,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:54:57,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:54:57,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-04 14:54:57,104 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 241 transitions, 2694 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:57,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:57,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-04 14:54:57,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:59,371 INFO L124 PetriNetUnfolderBase]: 10590/14843 cut-off events. [2024-06-04 14:54:59,372 INFO L125 PetriNetUnfolderBase]: For 466500/466502 co-relation queries the response was YES. [2024-06-04 14:54:59,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95915 conditions, 14843 events. 10590/14843 cut-off events. For 466500/466502 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 82136 event pairs, 3925 based on Foata normal form. 6/14831 useless extension candidates. Maximal degree in co-relation 95854. Up to 14111 conditions per place. [2024-06-04 14:54:59,514 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 202 selfloop transitions, 73 changer transitions 0/282 dead transitions. [2024-06-04 14:54:59,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 282 transitions, 3442 flow [2024-06-04 14:54:59,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:54:59,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:54:59,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-04 14:54:59,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4811320754716981 [2024-06-04 14:54:59,517 INFO L175 Difference]: Start difference. First operand has 148 places, 241 transitions, 2694 flow. Second operand 8 states and 204 transitions. [2024-06-04 14:54:59,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 282 transitions, 3442 flow [2024-06-04 14:54:59,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 282 transitions, 3347 flow, removed 21 selfloop flow, removed 3 redundant places. [2024-06-04 14:54:59,912 INFO L231 Difference]: Finished difference. Result has 153 places, 244 transitions, 2841 flow [2024-06-04 14:54:59,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2599, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2841, PETRI_PLACES=153, PETRI_TRANSITIONS=244} [2024-06-04 14:54:59,913 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 97 predicate places. [2024-06-04 14:54:59,913 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 244 transitions, 2841 flow [2024-06-04 14:54:59,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:59,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:59,914 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:59,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-04 14:54:59,914 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:54:59,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:59,914 INFO L85 PathProgramCache]: Analyzing trace with hash -1277727646, now seen corresponding path program 2 times [2024-06-04 14:54:59,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:59,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666769724] [2024-06-04 14:54:59,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:59,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:59,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:55:00,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:55:00,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:55:00,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666769724] [2024-06-04 14:55:00,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666769724] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:55:00,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:55:00,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:55:00,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510646376] [2024-06-04 14:55:00,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:55:00,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:55:00,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:55:00,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:55:00,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:55:01,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-04 14:55:01,053 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 244 transitions, 2841 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:55:01,054 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:55:01,054 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-04 14:55:01,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:55:03,539 INFO L124 PetriNetUnfolderBase]: 10787/15139 cut-off events. [2024-06-04 14:55:03,539 INFO L125 PetriNetUnfolderBase]: For 520374/520398 co-relation queries the response was YES. [2024-06-04 14:55:03,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99936 conditions, 15139 events. 10787/15139 cut-off events. For 520374/520398 co-relation queries the response was YES. Maximal size of possible extension queue 488. Compared 84163 event pairs, 3757 based on Foata normal form. 42/15165 useless extension candidates. Maximal degree in co-relation 99874. Up to 13934 conditions per place. [2024-06-04 14:55:03,703 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 231 selfloop transitions, 64 changer transitions 0/302 dead transitions. [2024-06-04 14:55:03,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 302 transitions, 4011 flow [2024-06-04 14:55:03,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:55:03,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:55:03,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 222 transitions. [2024-06-04 14:55:03,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5235849056603774 [2024-06-04 14:55:03,705 INFO L175 Difference]: Start difference. First operand has 153 places, 244 transitions, 2841 flow. Second operand 8 states and 222 transitions. [2024-06-04 14:55:03,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 302 transitions, 4011 flow [2024-06-04 14:55:04,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 302 transitions, 3795 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-04 14:55:04,285 INFO L231 Difference]: Finished difference. Result has 155 places, 247 transitions, 2846 flow [2024-06-04 14:55:04,286 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2625, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2846, PETRI_PLACES=155, PETRI_TRANSITIONS=247} [2024-06-04 14:55:04,286 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 99 predicate places. [2024-06-04 14:55:04,286 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 247 transitions, 2846 flow [2024-06-04 14:55:04,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:55:04,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:55:04,287 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:55:04,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-04 14:55:04,287 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:55:04,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:55:04,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1041552286, now seen corresponding path program 3 times [2024-06-04 14:55:04,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:55:04,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924424224] [2024-06-04 14:55:04,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:55:04,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:55:04,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:55:05,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:55:05,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:55:05,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924424224] [2024-06-04 14:55:05,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924424224] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:55:05,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:55:05,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:55:05,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164856157] [2024-06-04 14:55:05,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:55:05,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:55:05,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:55:05,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:55:05,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:55:05,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-04 14:55:05,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 247 transitions, 2846 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:55:05,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:55:05,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-04 14:55:05,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:55:08,053 INFO L124 PetriNetUnfolderBase]: 10984/15406 cut-off events. [2024-06-04 14:55:08,053 INFO L125 PetriNetUnfolderBase]: For 564738/564762 co-relation queries the response was YES. [2024-06-04 14:55:08,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104248 conditions, 15406 events. 10984/15406 cut-off events. For 564738/564762 co-relation queries the response was YES. Maximal size of possible extension queue 506. Compared 85762 event pairs, 3757 based on Foata normal form. 42/15432 useless extension candidates. Maximal degree in co-relation 104185. Up to 14217 conditions per place. [2024-06-04 14:55:08,217 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 227 selfloop transitions, 69 changer transitions 0/303 dead transitions. [2024-06-04 14:55:08,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 303 transitions, 3920 flow [2024-06-04 14:55:08,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:55:08,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:55:08,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 220 transitions. [2024-06-04 14:55:08,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5188679245283019 [2024-06-04 14:55:08,219 INFO L175 Difference]: Start difference. First operand has 155 places, 247 transitions, 2846 flow. Second operand 8 states and 220 transitions. [2024-06-04 14:55:08,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 303 transitions, 3920 flow [2024-06-04 14:55:08,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 303 transitions, 3735 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-04 14:55:08,873 INFO L231 Difference]: Finished difference. Result has 157 places, 250 transitions, 2898 flow [2024-06-04 14:55:08,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2661, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2898, PETRI_PLACES=157, PETRI_TRANSITIONS=250} [2024-06-04 14:55:08,873 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 101 predicate places. [2024-06-04 14:55:08,873 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 250 transitions, 2898 flow [2024-06-04 14:55:08,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:55:08,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:55:08,874 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:55:08,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-04 14:55:08,874 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:55:08,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:55:08,874 INFO L85 PathProgramCache]: Analyzing trace with hash -1041255616, now seen corresponding path program 4 times [2024-06-04 14:55:08,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:55:08,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160592760] [2024-06-04 14:55:08,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:55:08,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:55:08,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:55:09,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:55:09,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:55:09,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160592760] [2024-06-04 14:55:09,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160592760] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:55:09,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:55:09,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:55:09,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041190969] [2024-06-04 14:55:09,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:55:09,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:55:09,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:55:09,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:55:09,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:55:09,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-04 14:55:09,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 250 transitions, 2898 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:55:09,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:55:09,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-04 14:55:09,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:55:12,649 INFO L124 PetriNetUnfolderBase]: 11130/15616 cut-off events. [2024-06-04 14:55:12,649 INFO L125 PetriNetUnfolderBase]: For 601166/601190 co-relation queries the response was YES. [2024-06-04 14:55:12,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107137 conditions, 15616 events. 11130/15616 cut-off events. For 601166/601190 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 87056 event pairs, 3510 based on Foata normal form. 42/15642 useless extension candidates. Maximal degree in co-relation 107073. Up to 13642 conditions per place. [2024-06-04 14:55:12,839 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 223 selfloop transitions, 80 changer transitions 0/310 dead transitions. [2024-06-04 14:55:12,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 310 transitions, 4020 flow [2024-06-04 14:55:12,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:55:12,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:55:12,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 223 transitions. [2024-06-04 14:55:12,840 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5259433962264151 [2024-06-04 14:55:12,841 INFO L175 Difference]: Start difference. First operand has 157 places, 250 transitions, 2898 flow. Second operand 8 states and 223 transitions. [2024-06-04 14:55:12,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 310 transitions, 4020 flow [2024-06-04 14:55:13,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 310 transitions, 3819 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-04 14:55:13,463 INFO L231 Difference]: Finished difference. Result has 159 places, 253 transitions, 2961 flow [2024-06-04 14:55:13,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2697, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2961, PETRI_PLACES=159, PETRI_TRANSITIONS=253} [2024-06-04 14:55:13,464 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 103 predicate places. [2024-06-04 14:55:13,464 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 253 transitions, 2961 flow [2024-06-04 14:55:13,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:55:13,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:55:13,464 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:55:13,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-04 14:55:13,464 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)] === [2024-06-04 14:55:13,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:55:13,465 INFO L85 PathProgramCache]: Analyzing trace with hash 194193746, now seen corresponding path program 2 times [2024-06-04 14:55:13,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:55:13,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106383148] [2024-06-04 14:55:13,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:55:13,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:55:13,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:55:14,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:55:14,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:55:14,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106383148] [2024-06-04 14:55:14,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106383148] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:55:14,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:55:14,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:55:14,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629287623] [2024-06-04 14:55:14,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:55:14,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:55:14,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:55:14,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:55:14,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:55:14,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-04 14:55:14,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 253 transitions, 2961 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:55:14,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:55:14,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-04 14:55:14,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:55:16,942 INFO L124 PetriNetUnfolderBase]: 10376/14828 cut-off events. [2024-06-04 14:55:16,943 INFO L125 PetriNetUnfolderBase]: For 613846/613880 co-relation queries the response was YES. [2024-06-04 14:55:17,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103307 conditions, 14828 events. 10376/14828 cut-off events. For 613846/613880 co-relation queries the response was YES. Maximal size of possible extension queue 527. Compared 85922 event pairs, 3951 based on Foata normal form. 32/14830 useless extension candidates. Maximal degree in co-relation 103242. Up to 13782 conditions per place. [2024-06-04 14:55:17,344 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 195 selfloop transitions, 53 changer transitions 0/272 dead transitions. [2024-06-04 14:55:17,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 272 transitions, 3513 flow [2024-06-04 14:55:17,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:55:17,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:55:17,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-04 14:55:17,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48427672955974843 [2024-06-04 14:55:17,345 INFO L175 Difference]: Start difference. First operand has 159 places, 253 transitions, 2961 flow. Second operand 6 states and 154 transitions. [2024-06-04 14:55:17,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 272 transitions, 3513 flow [2024-06-04 14:55:18,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 272 transitions, 3255 flow, removed 51 selfloop flow, removed 6 redundant places. [2024-06-04 14:55:18,078 INFO L231 Difference]: Finished difference. Result has 159 places, 253 transitions, 2821 flow [2024-06-04 14:55:18,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2703, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2821, PETRI_PLACES=159, PETRI_TRANSITIONS=253} [2024-06-04 14:55:18,079 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 103 predicate places. [2024-06-04 14:55:18,079 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 253 transitions, 2821 flow [2024-06-04 14:55:18,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:55:18,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:55:18,079 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:55:18,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-04 14:55:18,080 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:55:18,080 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:55:18,080 INFO L85 PathProgramCache]: Analyzing trace with hash -600201228, now seen corresponding path program 5 times [2024-06-04 14:55:18,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:55:18,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866602444] [2024-06-04 14:55:18,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:55:18,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:55:18,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:55:18,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:55:18,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:55:18,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866602444] [2024-06-04 14:55:18,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866602444] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:55:18,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:55:18,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:55:18,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213607350] [2024-06-04 14:55:18,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:55:18,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:55:18,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:55:18,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:55:18,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:55:19,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-04 14:55:19,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 253 transitions, 2821 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:55:19,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:55:19,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-04 14:55:19,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:55:21,913 INFO L124 PetriNetUnfolderBase]: 11288/15849 cut-off events. [2024-06-04 14:55:21,913 INFO L125 PetriNetUnfolderBase]: For 646357/646369 co-relation queries the response was YES. [2024-06-04 14:55:22,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109559 conditions, 15849 events. 11288/15849 cut-off events. For 646357/646369 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 88732 event pairs, 4029 based on Foata normal form. 18/15864 useless extension candidates. Maximal degree in co-relation 109493. Up to 15122 conditions per place. [2024-06-04 14:55:22,107 INFO L140 encePairwiseOnDemand]: 38/53 looper letters, 247 selfloop transitions, 102 changer transitions 0/356 dead transitions. [2024-06-04 14:55:22,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 356 transitions, 4297 flow [2024-06-04 14:55:22,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 14:55:22,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 14:55:22,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 277 transitions. [2024-06-04 14:55:22,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4751286449399657 [2024-06-04 14:55:22,109 INFO L175 Difference]: Start difference. First operand has 159 places, 253 transitions, 2821 flow. Second operand 11 states and 277 transitions. [2024-06-04 14:55:22,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 356 transitions, 4297 flow [2024-06-04 14:55:22,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 356 transitions, 4121 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-04 14:55:22,784 INFO L231 Difference]: Finished difference. Result has 167 places, 298 transitions, 3530 flow [2024-06-04 14:55:22,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2669, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3530, PETRI_PLACES=167, PETRI_TRANSITIONS=298} [2024-06-04 14:55:22,785 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 111 predicate places. [2024-06-04 14:55:22,785 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 298 transitions, 3530 flow [2024-06-04 14:55:22,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:55:22,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:55:22,785 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:55:22,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-04 14:55:22,786 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:55:22,786 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:55:22,786 INFO L85 PathProgramCache]: Analyzing trace with hash -2012150816, now seen corresponding path program 6 times [2024-06-04 14:55:22,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:55:22,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833247179] [2024-06-04 14:55:22,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:55:22,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:55:22,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:55:23,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:55:23,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:55:23,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833247179] [2024-06-04 14:55:23,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833247179] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:55:23,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:55:23,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:55:23,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395975512] [2024-06-04 14:55:23,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:55:23,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:55:23,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:55:23,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:55:23,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:55:23,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-04 14:55:23,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 298 transitions, 3530 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:55:23,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:55:23,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-04 14:55:23,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:55:26,770 INFO L124 PetriNetUnfolderBase]: 11350/15951 cut-off events. [2024-06-04 14:55:26,784 INFO L125 PetriNetUnfolderBase]: For 675358/675364 co-relation queries the response was YES. [2024-06-04 14:55:26,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111854 conditions, 15951 events. 11350/15951 cut-off events. For 675358/675364 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 89470 event pairs, 4034 based on Foata normal form. 12/15960 useless extension candidates. Maximal degree in co-relation 111785. Up to 15222 conditions per place. [2024-06-04 14:55:26,945 INFO L140 encePairwiseOnDemand]: 38/53 looper letters, 258 selfloop transitions, 89 changer transitions 0/354 dead transitions. [2024-06-04 14:55:26,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 354 transitions, 4522 flow [2024-06-04 14:55:26,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:55:26,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:55:26,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 231 transitions. [2024-06-04 14:55:26,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48427672955974843 [2024-06-04 14:55:26,969 INFO L175 Difference]: Start difference. First operand has 167 places, 298 transitions, 3530 flow. Second operand 9 states and 231 transitions. [2024-06-04 14:55:26,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 354 transitions, 4522 flow [2024-06-04 14:55:27,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 354 transitions, 4224 flow, removed 56 selfloop flow, removed 6 redundant places. [2024-06-04 14:55:27,707 INFO L231 Difference]: Finished difference. Result has 170 places, 307 transitions, 3570 flow [2024-06-04 14:55:27,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=3278, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3570, PETRI_PLACES=170, PETRI_TRANSITIONS=307} [2024-06-04 14:55:27,707 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 114 predicate places. [2024-06-04 14:55:27,707 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 307 transitions, 3570 flow [2024-06-04 14:55:27,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:55:27,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:55:27,708 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:55:27,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-04 14:55:27,708 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:55:27,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:55:27,708 INFO L85 PathProgramCache]: Analyzing trace with hash -670907692, now seen corresponding path program 1 times [2024-06-04 14:55:27,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:55:27,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103285034] [2024-06-04 14:55:27,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:55:27,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:55:27,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:55:28,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:55:28,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:55:28,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103285034] [2024-06-04 14:55:28,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103285034] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:55:28,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:55:28,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:55:28,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682898387] [2024-06-04 14:55:28,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:55:28,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:55:28,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:55:28,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:55:28,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:55:28,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-04 14:55:28,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 307 transitions, 3570 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:55:28,627 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:55:28,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-04 14:55:28,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:55:31,163 INFO L124 PetriNetUnfolderBase]: 10218/14777 cut-off events. [2024-06-04 14:55:31,163 INFO L125 PetriNetUnfolderBase]: For 606089/606089 co-relation queries the response was YES. [2024-06-04 14:55:31,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101609 conditions, 14777 events. 10218/14777 cut-off events. For 606089/606089 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 86381 event pairs, 3530 based on Foata normal form. 8/14746 useless extension candidates. Maximal degree in co-relation 101539. Up to 13814 conditions per place. [2024-06-04 14:55:31,344 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 302 selfloop transitions, 26 changer transitions 0/336 dead transitions. [2024-06-04 14:55:31,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 336 transitions, 4499 flow [2024-06-04 14:55:31,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:55:31,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:55:31,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 162 transitions. [2024-06-04 14:55:31,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5094339622641509 [2024-06-04 14:55:31,345 INFO L175 Difference]: Start difference. First operand has 170 places, 307 transitions, 3570 flow. Second operand 6 states and 162 transitions. [2024-06-04 14:55:31,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 336 transitions, 4499 flow [2024-06-04 14:55:32,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 336 transitions, 4293 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-04 14:55:32,022 INFO L231 Difference]: Finished difference. Result has 168 places, 311 transitions, 3478 flow [2024-06-04 14:55:32,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=3364, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3478, PETRI_PLACES=168, PETRI_TRANSITIONS=311} [2024-06-04 14:55:32,023 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 112 predicate places. [2024-06-04 14:55:32,023 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 311 transitions, 3478 flow [2024-06-04 14:55:32,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:55:32,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:55:32,023 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:55:32,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-04 14:55:32,023 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:55:32,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:55:32,025 INFO L85 PathProgramCache]: Analyzing trace with hash 193680758, now seen corresponding path program 2 times [2024-06-04 14:55:32,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:55:32,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278053819] [2024-06-04 14:55:32,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:55:32,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:55:32,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:55:32,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:55:32,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:55:32,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278053819] [2024-06-04 14:55:32,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278053819] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:55:32,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:55:32,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:55:32,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668295229] [2024-06-04 14:55:32,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:55:32,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:55:32,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:55:32,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:55:32,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:55:32,970 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-04 14:55:32,971 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 311 transitions, 3478 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:55:32,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:55:32,971 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-04 14:55:32,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:55:35,630 INFO L124 PetriNetUnfolderBase]: 10066/14503 cut-off events. [2024-06-04 14:55:35,630 INFO L125 PetriNetUnfolderBase]: For 624931/624931 co-relation queries the response was YES. [2024-06-04 14:55:35,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101009 conditions, 14503 events. 10066/14503 cut-off events. For 624931/624931 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 83987 event pairs, 3444 based on Foata normal form. 4/14470 useless extension candidates. Maximal degree in co-relation 100938. Up to 13598 conditions per place. [2024-06-04 14:55:35,785 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 296 selfloop transitions, 27 changer transitions 0/331 dead transitions. [2024-06-04 14:55:35,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 331 transitions, 4198 flow [2024-06-04 14:55:35,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:55:35,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:55:35,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 158 transitions. [2024-06-04 14:55:35,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4968553459119497 [2024-06-04 14:55:35,792 INFO L175 Difference]: Start difference. First operand has 168 places, 311 transitions, 3478 flow. Second operand 6 states and 158 transitions. [2024-06-04 14:55:35,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 331 transitions, 4198 flow [2024-06-04 14:55:36,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 331 transitions, 4145 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-04 14:55:36,567 INFO L231 Difference]: Finished difference. Result has 171 places, 311 transitions, 3488 flow [2024-06-04 14:55:36,568 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=3425, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3488, PETRI_PLACES=171, PETRI_TRANSITIONS=311} [2024-06-04 14:55:36,568 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 115 predicate places. [2024-06-04 14:55:36,568 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 311 transitions, 3488 flow [2024-06-04 14:55:36,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:55:36,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:55:36,568 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:55:36,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-04 14:55:36,569 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:55:36,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:55:36,569 INFO L85 PathProgramCache]: Analyzing trace with hash 316934332, now seen corresponding path program 1 times [2024-06-04 14:55:36,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:55:36,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512135798] [2024-06-04 14:55:36,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:55:36,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:55:36,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:55:37,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:55:37,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:55:37,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512135798] [2024-06-04 14:55:37,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512135798] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:55:37,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:55:37,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:55:37,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812941694] [2024-06-04 14:55:37,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:55:37,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:55:37,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:55:37,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:55:37,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:55:38,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-04 14:55:38,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 311 transitions, 3488 flow. Second operand has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:55:38,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:55:38,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-04 14:55:38,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:55:41,422 INFO L124 PetriNetUnfolderBase]: 12855/18357 cut-off events. [2024-06-04 14:55:41,422 INFO L125 PetriNetUnfolderBase]: For 936814/936816 co-relation queries the response was YES. [2024-06-04 14:55:41,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132022 conditions, 18357 events. 12855/18357 cut-off events. For 936814/936816 co-relation queries the response was YES. Maximal size of possible extension queue 653. Compared 109196 event pairs, 3965 based on Foata normal form. 80/18417 useless extension candidates. Maximal degree in co-relation 131950. Up to 15036 conditions per place. [2024-06-04 14:55:41,609 INFO L140 encePairwiseOnDemand]: 38/53 looper letters, 301 selfloop transitions, 96 changer transitions 0/404 dead transitions. [2024-06-04 14:55:41,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 404 transitions, 5253 flow [2024-06-04 14:55:41,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:55:41,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:55:41,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 269 transitions. [2024-06-04 14:55:41,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5075471698113208 [2024-06-04 14:55:41,614 INFO L175 Difference]: Start difference. First operand has 171 places, 311 transitions, 3488 flow. Second operand 10 states and 269 transitions. [2024-06-04 14:55:41,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 404 transitions, 5253 flow [2024-06-04 14:55:42,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 404 transitions, 5167 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-04 14:55:42,517 INFO L231 Difference]: Finished difference. Result has 178 places, 331 transitions, 3981 flow [2024-06-04 14:55:42,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=3402, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3981, PETRI_PLACES=178, PETRI_TRANSITIONS=331} [2024-06-04 14:55:42,518 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 122 predicate places. [2024-06-04 14:55:42,518 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 331 transitions, 3981 flow [2024-06-04 14:55:42,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:55:42,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:55:42,519 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:55:42,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-04 14:55:42,519 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:55:42,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:55:42,520 INFO L85 PathProgramCache]: Analyzing trace with hash 316938052, now seen corresponding path program 2 times [2024-06-04 14:55:42,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:55:42,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401915283] [2024-06-04 14:55:42,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:55:42,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:55:42,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:55:43,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:55:43,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:55:43,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401915283] [2024-06-04 14:55:43,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401915283] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:55:43,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:55:43,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:55:43,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592861529] [2024-06-04 14:55:43,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:55:43,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:55:43,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:55:43,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:55:43,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:55:43,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-04 14:55:43,965 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 331 transitions, 3981 flow. Second operand has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:55:43,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:55:43,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-04 14:55:43,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:55:47,789 INFO L124 PetriNetUnfolderBase]: 13284/18969 cut-off events. [2024-06-04 14:55:47,789 INFO L125 PetriNetUnfolderBase]: For 1004757/1004759 co-relation queries the response was YES. [2024-06-04 14:55:47,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138766 conditions, 18969 events. 13284/18969 cut-off events. For 1004757/1004759 co-relation queries the response was YES. Maximal size of possible extension queue 699. Compared 113437 event pairs, 4610 based on Foata normal form. 94/19043 useless extension candidates. Maximal degree in co-relation 138690. Up to 16970 conditions per place. [2024-06-04 14:55:48,018 INFO L140 encePairwiseOnDemand]: 38/53 looper letters, 294 selfloop transitions, 94 changer transitions 0/395 dead transitions. [2024-06-04 14:55:48,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 395 transitions, 5243 flow [2024-06-04 14:55:48,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:55:48,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:55:48,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 262 transitions. [2024-06-04 14:55:48,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49433962264150944 [2024-06-04 14:55:48,020 INFO L175 Difference]: Start difference. First operand has 178 places, 331 transitions, 3981 flow. Second operand 10 states and 262 transitions. [2024-06-04 14:55:48,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 395 transitions, 5243 flow [2024-06-04 14:55:49,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 395 transitions, 5176 flow, removed 30 selfloop flow, removed 2 redundant places. [2024-06-04 14:55:49,261 INFO L231 Difference]: Finished difference. Result has 188 places, 335 transitions, 4270 flow [2024-06-04 14:55:49,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=3914, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4270, PETRI_PLACES=188, PETRI_TRANSITIONS=335} [2024-06-04 14:55:49,262 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 132 predicate places. [2024-06-04 14:55:49,262 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 335 transitions, 4270 flow [2024-06-04 14:55:49,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:55:49,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:55:49,263 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:55:49,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-04 14:55:49,263 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:55:49,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:55:49,263 INFO L85 PathProgramCache]: Analyzing trace with hash 1261493738, now seen corresponding path program 3 times [2024-06-04 14:55:49,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:55:49,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827513523] [2024-06-04 14:55:49,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:55:49,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:55:49,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat