./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix051_pso.opt_rmo.opt_tso.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/mix051_pso.opt_rmo.opt_tso.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/mix051_pso.opt_rmo.opt_tso.opt.i ./goblint.2024-05-21_14-57-05.files/protection/mix051_pso.opt_rmo.opt_tso.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 [2024-06-03 19:52:19,505 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-03 19:52:19,540 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-03 19:52:19,544 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-03 19:52:19,544 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-03 19:52:19,557 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-03 19:52:19,558 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-03 19:52:19,558 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-03 19:52:19,558 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-03 19:52:19,559 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-03 19:52:19,559 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-03 19:52:19,559 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-03 19:52:19,560 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-03 19:52:19,560 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-03 19:52:19,560 INFO L153 SettingsManager]: * Use SBE=true [2024-06-03 19:52:19,561 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-03 19:52:19,561 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-03 19:52:19,561 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-03 19:52:19,562 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-03 19:52:19,562 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-03 19:52:19,562 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-03 19:52:19,563 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-03 19:52:19,563 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-03 19:52:19,563 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-03 19:52:19,563 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-03 19:52:19,564 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-03 19:52:19,564 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-03 19:52:19,564 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-03 19:52:19,564 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-03 19:52:19,565 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-03 19:52:19,565 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-03 19:52:19,566 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-03 19:52:19,566 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 19:52:19,566 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-03 19:52:19,566 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-03 19:52:19,567 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-03 19:52:19,567 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-03 19:52:19,567 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-03 19:52:19,567 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-03 19:52:19,567 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-03 19:52:19,568 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-03 19:52:19,568 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-03 19:52:19,568 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-03 19:52:19,569 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-03 19:52:19,768 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-03 19:52:19,788 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-03 19:52:19,790 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-03 19:52:19,791 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-03 19:52:19,791 INFO L274 PluginConnector]: CDTParser initialized [2024-06-03 19:52:19,792 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix051_pso.opt_rmo.opt_tso.opt.i [2024-06-03 19:52:20,803 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-03 19:52:20,985 INFO L384 CDTParser]: Found 1 translation units. [2024-06-03 19:52:20,985 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix051_pso.opt_rmo.opt_tso.opt.i [2024-06-03 19:52:20,998 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e72a7d0fd/f49780661dd24c0780437b4eed547848/FLAG25495555d [2024-06-03 19:52:21,017 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e72a7d0fd/f49780661dd24c0780437b4eed547848 [2024-06-03 19:52:21,020 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-03 19:52:21,021 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-03 19:52:21,022 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix051_pso.opt_rmo.opt_tso.opt.yml/witness.yml [2024-06-03 19:52:21,203 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-03 19:52:21,205 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-03 19:52:21,207 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-03 19:52:21,207 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-03 19:52:21,210 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-03 19:52:21,211 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 07:52:21" (1/2) ... [2024-06-03 19:52:21,212 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16c66df5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:52:21, skipping insertion in model container [2024-06-03 19:52:21,212 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 07:52:21" (1/2) ... [2024-06-03 19:52:21,214 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@12e9f055 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:52:21, skipping insertion in model container [2024-06-03 19:52:21,215 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 07:52:21" (2/2) ... [2024-06-03 19:52:21,216 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16c66df5 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:52:21, skipping insertion in model container [2024-06-03 19:52:21,216 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 07:52:21" (2/2) ... [2024-06-03 19:52:21,217 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-03 19:52:21,315 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-03 19:52:21,316 INFO L97 edCorrectnessWitness]: Location invariant before [L851-L851] (((((((((((((((((((((! multithreaded || z$r_buff1_thd3 == (_Bool)0) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0) [2024-06-03 19:52:21,316 INFO L97 edCorrectnessWitness]: Location invariant before [L853-L853] (((((((((((((((((((((! multithreaded || z$r_buff1_thd3 == (_Bool)0) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0) [2024-06-03 19:52:21,316 INFO L97 edCorrectnessWitness]: Location invariant before [L849-L849] (((((((((((((((((((((! multithreaded || z$r_buff1_thd3 == (_Bool)0) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0) [2024-06-03 19:52:21,316 INFO L97 edCorrectnessWitness]: Location invariant before [L854-L854] (((((((((((((((((((((! multithreaded || z$r_buff1_thd3 == (_Bool)0) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0) [2024-06-03 19:52:21,317 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-03 19:52:21,317 INFO L106 edCorrectnessWitness]: ghost_update [L847-L847] multithreaded = 1; [2024-06-03 19:52:21,352 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-03 19:52:21,685 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 19:52:21,695 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-03 19:52:21,798 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 19:52:21,843 INFO L206 MainTranslator]: Completed translation [2024-06-03 19:52:21,843 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:52:21 WrapperNode [2024-06-03 19:52:21,843 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-03 19:52:21,844 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-03 19:52:21,844 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-03 19:52:21,844 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-03 19:52:21,850 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 03.06 07:52:21" (1/1) ... [2024-06-03 19:52:21,862 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 03.06 07:52:21" (1/1) ... [2024-06-03 19:52:21,892 INFO L138 Inliner]: procedures = 176, calls = 52, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 138 [2024-06-03 19:52:21,893 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-03 19:52:21,894 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-03 19:52:21,894 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-03 19:52:21,894 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-03 19:52:21,910 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:52:21" (1/1) ... [2024-06-03 19:52:21,911 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:52:21" (1/1) ... [2024-06-03 19:52:21,913 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:52:21" (1/1) ... [2024-06-03 19:52:21,932 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]. [2024-06-03 19:52:21,933 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:52:21" (1/1) ... [2024-06-03 19:52:21,933 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:52:21" (1/1) ... [2024-06-03 19:52:21,943 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:52:21" (1/1) ... [2024-06-03 19:52:21,945 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:52:21" (1/1) ... [2024-06-03 19:52:21,946 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:52:21" (1/1) ... [2024-06-03 19:52:21,947 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:52:21" (1/1) ... [2024-06-03 19:52:21,950 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-03 19:52:21,951 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-03 19:52:21,951 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-03 19:52:21,951 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-03 19:52:21,952 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:52:21" (1/1) ... [2024-06-03 19:52:21,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 19:52:21,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-03 19:52:21,973 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) [2024-06-03 19:52:22,004 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 [2024-06-03 19:52:22,010 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-03 19:52:22,011 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-03 19:52:22,011 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-03 19:52:22,011 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-03 19:52:22,011 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-03 19:52:22,011 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-03 19:52:22,011 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-03 19:52:22,011 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-03 19:52:22,012 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-03 19:52:22,012 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-03 19:52:22,012 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-03 19:52:22,012 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-03 19:52:22,012 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-03 19:52:22,013 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-03 19:52:22,014 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-03 19:52:22,139 INFO L244 CfgBuilder]: Building ICFG [2024-06-03 19:52:22,141 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-03 19:52:22,513 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-03 19:52:22,514 INFO L293 CfgBuilder]: Performing block encoding [2024-06-03 19:52:22,668 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-03 19:52:22,668 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-03 19:52:22,668 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 07:52:22 BoogieIcfgContainer [2024-06-03 19:52:22,669 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-03 19:52:22,670 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-03 19:52:22,670 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-03 19:52:22,673 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-03 19:52:22,673 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.06 07:52:21" (1/4) ... [2024-06-03 19:52:22,673 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b60b0b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.06 07:52:22, skipping insertion in model container [2024-06-03 19:52:22,673 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 07:52:21" (2/4) ... [2024-06-03 19:52:22,674 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b60b0b9 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 03.06 07:52:22, skipping insertion in model container [2024-06-03 19:52:22,674 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:52:21" (3/4) ... [2024-06-03 19:52:22,674 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b60b0b9 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 03.06 07:52:22, skipping insertion in model container [2024-06-03 19:52:22,674 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 07:52:22" (4/4) ... [2024-06-03 19:52:22,675 INFO L112 eAbstractionObserver]: Analyzing ICFG mix051_pso.opt_rmo.opt_tso.opt.i [2024-06-03 19:52:22,692 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-03 19:52:22,692 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-03 19:52:22,693 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-03 19:52:22,739 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-03 19:52:22,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 65 places, 52 transitions, 120 flow [2024-06-03 19:52:22,784 INFO L124 PetriNetUnfolderBase]: 0/48 cut-off events. [2024-06-03 19:52:22,784 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 19:52:22,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61 conditions, 48 events. 0/48 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 86 event pairs, 0 based on Foata normal form. 0/44 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-03 19:52:22,787 INFO L82 GeneralOperation]: Start removeDead. Operand has 65 places, 52 transitions, 120 flow [2024-06-03 19:52:22,790 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 55 places, 42 transitions, 96 flow [2024-06-03 19:52:22,802 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-03 19:52:22,808 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;@7384dd05, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-03 19:52:22,808 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-03 19:52:22,812 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-03 19:52:22,812 INFO L124 PetriNetUnfolderBase]: 0/7 cut-off events. [2024-06-03 19:52:22,812 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 19:52:22,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:52:22,813 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-03 19:52:22,813 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)] === [2024-06-03 19:52:22,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:52:22,818 INFO L85 PathProgramCache]: Analyzing trace with hash -1341969668, now seen corresponding path program 1 times [2024-06-03 19:52:22,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:52:22,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065179330] [2024-06-03 19:52:22,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:52:22,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:52:22,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:52:23,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:52:23,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:52:23,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065179330] [2024-06-03 19:52:23,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065179330] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:52:23,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:52:23,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-03 19:52:23,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103471461] [2024-06-03 19:52:23,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:52:23,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-03 19:52:23,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:52:23,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-03 19:52:23,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-03 19:52:23,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-03 19:52:23,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 42 transitions, 96 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) [2024-06-03 19:52:23,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:52:23,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-03 19:52:23,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:52:24,773 INFO L124 PetriNetUnfolderBase]: 5296/7609 cut-off events. [2024-06-03 19:52:24,774 INFO L125 PetriNetUnfolderBase]: For 122/122 co-relation queries the response was YES. [2024-06-03 19:52:24,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15162 conditions, 7609 events. 5296/7609 cut-off events. For 122/122 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 42862 event pairs, 3946 based on Foata normal form. 1/7423 useless extension candidates. Maximal degree in co-relation 15146. Up to 7282 conditions per place. [2024-06-03 19:52:24,816 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 42 selfloop transitions, 5 changer transitions 0/56 dead transitions. [2024-06-03 19:52:24,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 56 transitions, 227 flow [2024-06-03 19:52:24,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-03 19:52:24,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-03 19:52:24,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 99 transitions. [2024-06-03 19:52:24,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6346153846153846 [2024-06-03 19:52:24,827 INFO L175 Difference]: Start difference. First operand has 55 places, 42 transitions, 96 flow. Second operand 3 states and 99 transitions. [2024-06-03 19:52:24,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 56 transitions, 227 flow [2024-06-03 19:52:24,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 56 transitions, 220 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-03 19:52:24,835 INFO L231 Difference]: Finished difference. Result has 54 places, 46 transitions, 131 flow [2024-06-03 19:52:24,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=131, PETRI_PLACES=54, PETRI_TRANSITIONS=46} [2024-06-03 19:52:24,839 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -1 predicate places. [2024-06-03 19:52:24,839 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 46 transitions, 131 flow [2024-06-03 19:52:24,839 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) [2024-06-03 19:52:24,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:52:24,840 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:52:24,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-03 19:52:24,840 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)] === [2024-06-03 19:52:24,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:52:24,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1142642021, now seen corresponding path program 1 times [2024-06-03 19:52:24,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:52:24,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122462798] [2024-06-03 19:52:24,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:52:24,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:52:24,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:52:25,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:52:25,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:52:25,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122462798] [2024-06-03 19:52:25,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122462798] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:52:25,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:52:25,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-03 19:52:25,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659611994] [2024-06-03 19:52:25,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:52:25,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-03 19:52:25,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:52:25,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-03 19:52:25,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-03 19:52:25,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 52 [2024-06-03 19:52:25,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 46 transitions, 131 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) [2024-06-03 19:52:25,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:52:25,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 52 [2024-06-03 19:52:25,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:52:26,574 INFO L124 PetriNetUnfolderBase]: 6191/8656 cut-off events. [2024-06-03 19:52:26,574 INFO L125 PetriNetUnfolderBase]: For 1762/1762 co-relation queries the response was YES. [2024-06-03 19:52:26,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19896 conditions, 8656 events. 6191/8656 cut-off events. For 1762/1762 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 47546 event pairs, 4100 based on Foata normal form. 4/8601 useless extension candidates. Maximal degree in co-relation 19881. Up to 8452 conditions per place. [2024-06-03 19:52:26,616 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 53 selfloop transitions, 9 changer transitions 0/70 dead transitions. [2024-06-03 19:52:26,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 70 transitions, 321 flow [2024-06-03 19:52:26,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-03 19:52:26,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-03 19:52:26,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 126 transitions. [2024-06-03 19:52:26,618 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6057692307692307 [2024-06-03 19:52:26,618 INFO L175 Difference]: Start difference. First operand has 54 places, 46 transitions, 131 flow. Second operand 4 states and 126 transitions. [2024-06-03 19:52:26,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 70 transitions, 321 flow [2024-06-03 19:52:26,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 70 transitions, 316 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-03 19:52:26,621 INFO L231 Difference]: Finished difference. Result has 57 places, 50 transitions, 179 flow [2024-06-03 19:52:26,621 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=179, PETRI_PLACES=57, PETRI_TRANSITIONS=50} [2024-06-03 19:52:26,622 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 2 predicate places. [2024-06-03 19:52:26,622 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 50 transitions, 179 flow [2024-06-03 19:52:26,622 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) [2024-06-03 19:52:26,622 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:52:26,622 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:52:26,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-03 19:52:26,623 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)] === [2024-06-03 19:52:26,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:52:26,623 INFO L85 PathProgramCache]: Analyzing trace with hash -1062163593, now seen corresponding path program 1 times [2024-06-03 19:52:26,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:52:26,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489852500] [2024-06-03 19:52:26,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:52:26,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:52:26,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:52:27,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:52:27,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:52:27,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489852500] [2024-06-03 19:52:27,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489852500] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:52:27,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:52:27,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-03 19:52:27,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594897026] [2024-06-03 19:52:27,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:52:27,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-03 19:52:27,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:52:27,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-03 19:52:27,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-03 19:52:27,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 52 [2024-06-03 19:52:27,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 50 transitions, 179 flow. Second operand has 5 states, 5 states have (on average 16.6) internal successors, (83), 5 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:52:27,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:52:27,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 52 [2024-06-03 19:52:27,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:52:28,330 INFO L124 PetriNetUnfolderBase]: 6209/8723 cut-off events. [2024-06-03 19:52:28,331 INFO L125 PetriNetUnfolderBase]: For 5064/5064 co-relation queries the response was YES. [2024-06-03 19:52:28,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22476 conditions, 8723 events. 6209/8723 cut-off events. For 5064/5064 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 48369 event pairs, 3061 based on Foata normal form. 7/8704 useless extension candidates. Maximal degree in co-relation 22459. Up to 8373 conditions per place. [2024-06-03 19:52:28,375 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 71 selfloop transitions, 21 changer transitions 0/100 dead transitions. [2024-06-03 19:52:28,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 100 transitions, 537 flow [2024-06-03 19:52:28,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 19:52:28,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 19:52:28,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 165 transitions. [2024-06-03 19:52:28,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6346153846153846 [2024-06-03 19:52:28,377 INFO L175 Difference]: Start difference. First operand has 57 places, 50 transitions, 179 flow. Second operand 5 states and 165 transitions. [2024-06-03 19:52:28,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 100 transitions, 537 flow [2024-06-03 19:52:28,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 100 transitions, 518 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-03 19:52:28,381 INFO L231 Difference]: Finished difference. Result has 62 places, 64 transitions, 310 flow [2024-06-03 19:52:28,381 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=310, PETRI_PLACES=62, PETRI_TRANSITIONS=64} [2024-06-03 19:52:28,381 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 7 predicate places. [2024-06-03 19:52:28,381 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 64 transitions, 310 flow [2024-06-03 19:52:28,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 5 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:52:28,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:52:28,382 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:52:28,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-03 19:52:28,382 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:52:28,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:52:28,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1463026678, now seen corresponding path program 1 times [2024-06-03 19:52:28,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:52:28,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611678913] [2024-06-03 19:52:28,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:52:28,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:52:28,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:52:29,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:52:29,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:52:29,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611678913] [2024-06-03 19:52:29,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611678913] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:52:29,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:52:29,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 19:52:29,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083030922] [2024-06-03 19:52:29,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:52:29,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 19:52:29,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:52:29,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 19:52:29,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-03 19:52:29,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 52 [2024-06-03 19:52:29,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 64 transitions, 310 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:52:29,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:52:29,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 52 [2024-06-03 19:52:29,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:52:30,153 INFO L124 PetriNetUnfolderBase]: 6351/8943 cut-off events. [2024-06-03 19:52:30,153 INFO L125 PetriNetUnfolderBase]: For 12467/12486 co-relation queries the response was YES. [2024-06-03 19:52:30,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27270 conditions, 8943 events. 6351/8943 cut-off events. For 12467/12486 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 49693 event pairs, 2386 based on Foata normal form. 48/8963 useless extension candidates. Maximal degree in co-relation 27250. Up to 8365 conditions per place. [2024-06-03 19:52:30,210 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 81 selfloop transitions, 24 changer transitions 0/113 dead transitions. [2024-06-03 19:52:30,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 113 transitions, 692 flow [2024-06-03 19:52:30,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:52:30,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:52:30,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 193 transitions. [2024-06-03 19:52:30,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6185897435897436 [2024-06-03 19:52:30,213 INFO L175 Difference]: Start difference. First operand has 62 places, 64 transitions, 310 flow. Second operand 6 states and 193 transitions. [2024-06-03 19:52:30,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 113 transitions, 692 flow [2024-06-03 19:52:30,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 113 transitions, 680 flow, removed 6 selfloop flow, removed 0 redundant places. [2024-06-03 19:52:30,220 INFO L231 Difference]: Finished difference. Result has 67 places, 66 transitions, 379 flow [2024-06-03 19:52:30,220 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=290, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=379, PETRI_PLACES=67, PETRI_TRANSITIONS=66} [2024-06-03 19:52:30,221 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 12 predicate places. [2024-06-03 19:52:30,221 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 66 transitions, 379 flow [2024-06-03 19:52:30,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:52:30,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:52:30,221 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:52:30,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-03 19:52:30,222 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)] === [2024-06-03 19:52:30,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:52:30,222 INFO L85 PathProgramCache]: Analyzing trace with hash 1288603533, now seen corresponding path program 1 times [2024-06-03 19:52:30,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:52:30,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141650151] [2024-06-03 19:52:30,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:52:30,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:52:30,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:52:30,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:52:30,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:52:30,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141650151] [2024-06-03 19:52:30,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141650151] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:52:30,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:52:30,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 19:52:30,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815589318] [2024-06-03 19:52:30,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:52:30,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 19:52:30,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:52:30,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 19:52:30,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-03 19:52:30,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 52 [2024-06-03 19:52:30,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 66 transitions, 379 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:52:30,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:52:30,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 52 [2024-06-03 19:52:30,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:52:31,966 INFO L124 PetriNetUnfolderBase]: 5437/7898 cut-off events. [2024-06-03 19:52:31,966 INFO L125 PetriNetUnfolderBase]: For 15542/15564 co-relation queries the response was YES. [2024-06-03 19:52:31,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25888 conditions, 7898 events. 5437/7898 cut-off events. For 15542/15564 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 45350 event pairs, 2456 based on Foata normal form. 3/7879 useless extension candidates. Maximal degree in co-relation 25865. Up to 7488 conditions per place. [2024-06-03 19:52:32,021 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 64 selfloop transitions, 10 changer transitions 0/83 dead transitions. [2024-06-03 19:52:32,022 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 83 transitions, 571 flow [2024-06-03 19:52:32,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 19:52:32,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 19:52:32,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 135 transitions. [2024-06-03 19:52:32,023 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5192307692307693 [2024-06-03 19:52:32,023 INFO L175 Difference]: Start difference. First operand has 67 places, 66 transitions, 379 flow. Second operand 5 states and 135 transitions. [2024-06-03 19:52:32,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 83 transitions, 571 flow [2024-06-03 19:52:32,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 83 transitions, 510 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-03 19:52:32,032 INFO L231 Difference]: Finished difference. Result has 68 places, 66 transitions, 349 flow [2024-06-03 19:52:32,032 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=318, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=349, PETRI_PLACES=68, PETRI_TRANSITIONS=66} [2024-06-03 19:52:32,033 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 13 predicate places. [2024-06-03 19:52:32,033 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 66 transitions, 349 flow [2024-06-03 19:52:32,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:52:32,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:52:32,033 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:52:32,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-03 19:52:32,034 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)] === [2024-06-03 19:52:32,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:52:32,034 INFO L85 PathProgramCache]: Analyzing trace with hash 733072842, now seen corresponding path program 1 times [2024-06-03 19:52:32,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:52:32,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601846239] [2024-06-03 19:52:32,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:52:32,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:52:32,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:52:32,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:52:32,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:52:32,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601846239] [2024-06-03 19:52:32,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601846239] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:52:32,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:52:32,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:52:32,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311601491] [2024-06-03 19:52:32,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:52:32,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:52:32,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:52:32,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:52:32,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:52:32,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-03 19:52:32,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 66 transitions, 349 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) [2024-06-03 19:52:32,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:52:32,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-03 19:52:32,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:52:33,979 INFO L124 PetriNetUnfolderBase]: 6355/8945 cut-off events. [2024-06-03 19:52:33,979 INFO L125 PetriNetUnfolderBase]: For 21030/21050 co-relation queries the response was YES. [2024-06-03 19:52:34,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29781 conditions, 8945 events. 6355/8945 cut-off events. For 21030/21050 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 49689 event pairs, 2932 based on Foata normal form. 24/8947 useless extension candidates. Maximal degree in co-relation 29756. Up to 8595 conditions per place. [2024-06-03 19:52:34,044 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 67 selfloop transitions, 25 changer transitions 0/100 dead transitions. [2024-06-03 19:52:34,044 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 100 transitions, 670 flow [2024-06-03 19:52:34,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:52:34,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:52:34,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 166 transitions. [2024-06-03 19:52:34,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.532051282051282 [2024-06-03 19:52:34,046 INFO L175 Difference]: Start difference. First operand has 68 places, 66 transitions, 349 flow. Second operand 6 states and 166 transitions. [2024-06-03 19:52:34,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 100 transitions, 670 flow [2024-06-03 19:52:34,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 100 transitions, 641 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-03 19:52:34,057 INFO L231 Difference]: Finished difference. Result has 70 places, 70 transitions, 416 flow [2024-06-03 19:52:34,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=320, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=416, PETRI_PLACES=70, PETRI_TRANSITIONS=70} [2024-06-03 19:52:34,057 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 15 predicate places. [2024-06-03 19:52:34,058 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 70 transitions, 416 flow [2024-06-03 19:52:34,058 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) [2024-06-03 19:52:34,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:52:34,058 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:52:34,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-03 19:52:34,058 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)] === [2024-06-03 19:52:34,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:52:34,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1397465772, now seen corresponding path program 2 times [2024-06-03 19:52:34,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:52:34,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473042528] [2024-06-03 19:52:34,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:52:34,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:52:34,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:52:34,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:52:34,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:52:34,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473042528] [2024-06-03 19:52:34,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473042528] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:52:34,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:52:34,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:52:34,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422990836] [2024-06-03 19:52:34,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:52:34,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:52:34,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:52:34,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:52:34,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:52:34,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-03 19:52:34,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 70 transitions, 416 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) [2024-06-03 19:52:34,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:52:34,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-03 19:52:34,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:52:35,900 INFO L124 PetriNetUnfolderBase]: 6310/8872 cut-off events. [2024-06-03 19:52:35,900 INFO L125 PetriNetUnfolderBase]: For 25012/25040 co-relation queries the response was YES. [2024-06-03 19:52:35,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30367 conditions, 8872 events. 6310/8872 cut-off events. For 25012/25040 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 49035 event pairs, 2946 based on Foata normal form. 24/8868 useless extension candidates. Maximal degree in co-relation 30342. Up to 8526 conditions per place. [2024-06-03 19:52:35,959 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 60 selfloop transitions, 26 changer transitions 0/94 dead transitions. [2024-06-03 19:52:35,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 94 transitions, 650 flow [2024-06-03 19:52:35,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:52:35,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:52:35,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 161 transitions. [2024-06-03 19:52:35,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5160256410256411 [2024-06-03 19:52:35,960 INFO L175 Difference]: Start difference. First operand has 70 places, 70 transitions, 416 flow. Second operand 6 states and 161 transitions. [2024-06-03 19:52:35,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 94 transitions, 650 flow [2024-06-03 19:52:35,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 94 transitions, 607 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-03 19:52:35,973 INFO L231 Difference]: Finished difference. Result has 73 places, 70 transitions, 436 flow [2024-06-03 19:52:35,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=373, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=436, PETRI_PLACES=73, PETRI_TRANSITIONS=70} [2024-06-03 19:52:35,974 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 18 predicate places. [2024-06-03 19:52:35,974 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 70 transitions, 436 flow [2024-06-03 19:52:35,974 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) [2024-06-03 19:52:35,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:52:35,975 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:52:35,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-03 19:52:35,975 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)] === [2024-06-03 19:52:35,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:52:35,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1427801086, now seen corresponding path program 1 times [2024-06-03 19:52:35,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:52:35,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255695987] [2024-06-03 19:52:35,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:52:35,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:52:36,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:52:36,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:52:36,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:52:36,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255695987] [2024-06-03 19:52:36,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255695987] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:52:36,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:52:36,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:52:36,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071853697] [2024-06-03 19:52:36,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:52:36,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:52:36,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:52:36,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:52:36,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:52:36,967 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-03 19:52:36,967 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 70 transitions, 436 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) [2024-06-03 19:52:36,967 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:52:36,967 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-03 19:52:36,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:52:38,111 INFO L124 PetriNetUnfolderBase]: 6889/9839 cut-off events. [2024-06-03 19:52:38,111 INFO L125 PetriNetUnfolderBase]: For 30543/30543 co-relation queries the response was YES. [2024-06-03 19:52:38,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33615 conditions, 9839 events. 6889/9839 cut-off events. For 30543/30543 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 54854 event pairs, 3133 based on Foata normal form. 6/9828 useless extension candidates. Maximal degree in co-relation 33589. Up to 9382 conditions per place. [2024-06-03 19:52:38,173 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 84 selfloop transitions, 17 changer transitions 0/109 dead transitions. [2024-06-03 19:52:38,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 109 transitions, 775 flow [2024-06-03 19:52:38,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:52:38,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:52:38,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-03 19:52:38,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49725274725274726 [2024-06-03 19:52:38,175 INFO L175 Difference]: Start difference. First operand has 73 places, 70 transitions, 436 flow. Second operand 7 states and 181 transitions. [2024-06-03 19:52:38,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 109 transitions, 775 flow [2024-06-03 19:52:38,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 109 transitions, 684 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-03 19:52:38,196 INFO L231 Difference]: Finished difference. Result has 75 places, 77 transitions, 457 flow [2024-06-03 19:52:38,196 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=352, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=457, PETRI_PLACES=75, PETRI_TRANSITIONS=77} [2024-06-03 19:52:38,197 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 20 predicate places. [2024-06-03 19:52:38,197 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 77 transitions, 457 flow [2024-06-03 19:52:38,197 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) [2024-06-03 19:52:38,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:52:38,197 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:52:38,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-03 19:52:38,198 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:52:38,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:52:38,198 INFO L85 PathProgramCache]: Analyzing trace with hash 128141917, now seen corresponding path program 1 times [2024-06-03 19:52:38,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:52:38,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076360226] [2024-06-03 19:52:38,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:52:38,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:52:38,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:52:38,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:52:38,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:52:38,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076360226] [2024-06-03 19:52:38,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076360226] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:52:38,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:52:38,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 19:52:38,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466294211] [2024-06-03 19:52:38,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:52:38,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 19:52:38,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:52:38,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 19:52:38,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-03 19:52:38,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-03 19:52:38,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 77 transitions, 457 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:52:38,940 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:52:38,940 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-03 19:52:38,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:52:39,912 INFO L124 PetriNetUnfolderBase]: 6875/10005 cut-off events. [2024-06-03 19:52:39,912 INFO L125 PetriNetUnfolderBase]: For 37806/37806 co-relation queries the response was YES. [2024-06-03 19:52:39,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35902 conditions, 10005 events. 6875/10005 cut-off events. For 37806/37806 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 56962 event pairs, 3191 based on Foata normal form. 4/10005 useless extension candidates. Maximal degree in co-relation 35874. Up to 9406 conditions per place. [2024-06-03 19:52:39,973 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 78 selfloop transitions, 10 changer transitions 0/96 dead transitions. [2024-06-03 19:52:39,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 96 transitions, 703 flow [2024-06-03 19:52:39,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 19:52:39,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 19:52:39,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 128 transitions. [2024-06-03 19:52:39,975 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49230769230769234 [2024-06-03 19:52:39,975 INFO L175 Difference]: Start difference. First operand has 75 places, 77 transitions, 457 flow. Second operand 5 states and 128 transitions. [2024-06-03 19:52:39,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 96 transitions, 703 flow [2024-06-03 19:52:40,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 96 transitions, 655 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-03 19:52:40,003 INFO L231 Difference]: Finished difference. Result has 76 places, 81 transitions, 478 flow [2024-06-03 19:52:40,003 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=409, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=478, PETRI_PLACES=76, PETRI_TRANSITIONS=81} [2024-06-03 19:52:40,004 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 21 predicate places. [2024-06-03 19:52:40,004 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 81 transitions, 478 flow [2024-06-03 19:52:40,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:52:40,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:52:40,005 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:52:40,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-03 19:52:40,005 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)] === [2024-06-03 19:52:40,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:52:40,005 INFO L85 PathProgramCache]: Analyzing trace with hash -1052143005, now seen corresponding path program 1 times [2024-06-03 19:52:40,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:52:40,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006210266] [2024-06-03 19:52:40,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:52:40,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:52:40,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:52:40,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:52:40,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:52:40,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006210266] [2024-06-03 19:52:40,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006210266] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:52:40,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:52:40,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:52:40,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087974853] [2024-06-03 19:52:40,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:52:40,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:52:40,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:52:40,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:52:40,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:52:40,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-03 19:52:40,945 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 81 transitions, 478 flow. Second operand has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:52:40,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:52:40,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-03 19:52:40,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:52:42,195 INFO L124 PetriNetUnfolderBase]: 8101/11368 cut-off events. [2024-06-03 19:52:42,195 INFO L125 PetriNetUnfolderBase]: For 60378/60470 co-relation queries the response was YES. [2024-06-03 19:52:42,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44471 conditions, 11368 events. 8101/11368 cut-off events. For 60378/60470 co-relation queries the response was YES. Maximal size of possible extension queue 467. Compared 63729 event pairs, 2691 based on Foata normal form. 54/11391 useless extension candidates. Maximal degree in co-relation 44442. Up to 10308 conditions per place. [2024-06-03 19:52:42,271 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 89 selfloop transitions, 32 changer transitions 0/130 dead transitions. [2024-06-03 19:52:42,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 130 transitions, 944 flow [2024-06-03 19:52:42,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:52:42,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:52:42,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 195 transitions. [2024-06-03 19:52:42,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2024-06-03 19:52:42,273 INFO L175 Difference]: Start difference. First operand has 76 places, 81 transitions, 478 flow. Second operand 7 states and 195 transitions. [2024-06-03 19:52:42,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 130 transitions, 944 flow [2024-06-03 19:52:42,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 130 transitions, 905 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-03 19:52:42,297 INFO L231 Difference]: Finished difference. Result has 80 places, 85 transitions, 568 flow [2024-06-03 19:52:42,298 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=439, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=568, PETRI_PLACES=80, PETRI_TRANSITIONS=85} [2024-06-03 19:52:42,298 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 25 predicate places. [2024-06-03 19:52:42,298 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 85 transitions, 568 flow [2024-06-03 19:52:42,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:52:42,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:52:42,299 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:52:42,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-03 19:52:42,299 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)] === [2024-06-03 19:52:42,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:52:42,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1052082555, now seen corresponding path program 2 times [2024-06-03 19:52:42,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:52:42,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954985602] [2024-06-03 19:52:42,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:52:42,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:52:42,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:52:43,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:52:43,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:52:43,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954985602] [2024-06-03 19:52:43,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954985602] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:52:43,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:52:43,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:52:43,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336778136] [2024-06-03 19:52:43,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:52:43,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:52:43,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:52:43,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:52:43,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:52:43,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-03 19:52:43,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 85 transitions, 568 flow. Second operand has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:52:43,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:52:43,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-03 19:52:43,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:52:44,619 INFO L124 PetriNetUnfolderBase]: 8214/11557 cut-off events. [2024-06-03 19:52:44,619 INFO L125 PetriNetUnfolderBase]: For 73619/73711 co-relation queries the response was YES. [2024-06-03 19:52:44,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47117 conditions, 11557 events. 8214/11557 cut-off events. For 73619/73711 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 65231 event pairs, 3271 based on Foata normal form. 87/11613 useless extension candidates. Maximal degree in co-relation 47087. Up to 10934 conditions per place. [2024-06-03 19:52:44,709 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 86 selfloop transitions, 31 changer transitions 0/126 dead transitions. [2024-06-03 19:52:44,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 126 transitions, 938 flow [2024-06-03 19:52:44,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:52:44,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:52:44,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 191 transitions. [2024-06-03 19:52:44,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5247252747252747 [2024-06-03 19:52:44,722 INFO L175 Difference]: Start difference. First operand has 80 places, 85 transitions, 568 flow. Second operand 7 states and 191 transitions. [2024-06-03 19:52:44,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 126 transitions, 938 flow [2024-06-03 19:52:44,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 126 transitions, 891 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-03 19:52:44,812 INFO L231 Difference]: Finished difference. Result has 84 places, 88 transitions, 636 flow [2024-06-03 19:52:44,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=521, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=636, PETRI_PLACES=84, PETRI_TRANSITIONS=88} [2024-06-03 19:52:44,813 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 29 predicate places. [2024-06-03 19:52:44,813 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 88 transitions, 636 flow [2024-06-03 19:52:44,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:52:44,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:52:44,813 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:52:44,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-03 19:52:44,814 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:52:44,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:52:44,814 INFO L85 PathProgramCache]: Analyzing trace with hash -1421065540, now seen corresponding path program 1 times [2024-06-03 19:52:44,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:52:44,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601752608] [2024-06-03 19:52:44,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:52:44,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:52:44,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:52:45,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:52:45,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:52:45,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601752608] [2024-06-03 19:52:45,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601752608] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:52:45,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:52:45,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:52:45,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104714859] [2024-06-03 19:52:45,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:52:45,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:52:45,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:52:45,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:52:45,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:52:45,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-03 19:52:45,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 88 transitions, 636 flow. Second operand has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:52:45,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:52:45,701 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-03 19:52:45,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:52:47,101 INFO L124 PetriNetUnfolderBase]: 8465/11868 cut-off events. [2024-06-03 19:52:47,101 INFO L125 PetriNetUnfolderBase]: For 83732/83732 co-relation queries the response was YES. [2024-06-03 19:52:47,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49985 conditions, 11868 events. 8465/11868 cut-off events. For 83732/83732 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 65005 event pairs, 3709 based on Foata normal form. 4/11865 useless extension candidates. Maximal degree in co-relation 49953. Up to 11517 conditions per place. [2024-06-03 19:52:47,167 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 97 selfloop transitions, 21 changer transitions 0/125 dead transitions. [2024-06-03 19:52:47,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 125 transitions, 1068 flow [2024-06-03 19:52:47,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:52:47,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:52:47,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-03 19:52:47,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5032051282051282 [2024-06-03 19:52:47,168 INFO L175 Difference]: Start difference. First operand has 84 places, 88 transitions, 636 flow. Second operand 6 states and 157 transitions. [2024-06-03 19:52:47,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 125 transitions, 1068 flow [2024-06-03 19:52:47,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 125 transitions, 989 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-03 19:52:47,224 INFO L231 Difference]: Finished difference. Result has 85 places, 96 transitions, 696 flow [2024-06-03 19:52:47,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=557, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=696, PETRI_PLACES=85, PETRI_TRANSITIONS=96} [2024-06-03 19:52:47,225 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 30 predicate places. [2024-06-03 19:52:47,225 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 96 transitions, 696 flow [2024-06-03 19:52:47,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:52:47,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:52:47,225 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:52:47,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-03 19:52:47,225 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)] === [2024-06-03 19:52:47,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:52:47,226 INFO L85 PathProgramCache]: Analyzing trace with hash 2013757149, now seen corresponding path program 1 times [2024-06-03 19:52:47,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:52:47,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467097967] [2024-06-03 19:52:47,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:52:47,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:52:47,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:52:48,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:52:48,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:52:48,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467097967] [2024-06-03 19:52:48,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467097967] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:52:48,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:52:48,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:52:48,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458151687] [2024-06-03 19:52:48,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:52:48,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:52:48,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:52:48,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:52:48,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:52:48,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-03 19:52:48,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 96 transitions, 696 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) [2024-06-03 19:52:48,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:52:48,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-03 19:52:48,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:52:49,818 INFO L124 PetriNetUnfolderBase]: 8523/11946 cut-off events. [2024-06-03 19:52:49,819 INFO L125 PetriNetUnfolderBase]: For 99583/99592 co-relation queries the response was YES. [2024-06-03 19:52:49,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52623 conditions, 11946 events. 8523/11946 cut-off events. For 99583/99592 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 65512 event pairs, 3526 based on Foata normal form. 8/11938 useless extension candidates. Maximal degree in co-relation 52590. Up to 11416 conditions per place. [2024-06-03 19:52:49,891 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 100 selfloop transitions, 44 changer transitions 0/151 dead transitions. [2024-06-03 19:52:49,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 151 transitions, 1215 flow [2024-06-03 19:52:49,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:52:49,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:52:49,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-03 19:52:49,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49759615384615385 [2024-06-03 19:52:49,895 INFO L175 Difference]: Start difference. First operand has 85 places, 96 transitions, 696 flow. Second operand 8 states and 207 transitions. [2024-06-03 19:52:49,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 151 transitions, 1215 flow [2024-06-03 19:52:49,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 151 transitions, 1173 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-06-03 19:52:49,971 INFO L231 Difference]: Finished difference. Result has 92 places, 111 transitions, 901 flow [2024-06-03 19:52:49,971 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=654, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=901, PETRI_PLACES=92, PETRI_TRANSITIONS=111} [2024-06-03 19:52:49,973 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 37 predicate places. [2024-06-03 19:52:49,973 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 111 transitions, 901 flow [2024-06-03 19:52:49,973 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) [2024-06-03 19:52:49,973 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:52:49,973 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:52:49,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-03 19:52:49,974 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)] === [2024-06-03 19:52:49,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:52:49,974 INFO L85 PathProgramCache]: Analyzing trace with hash 2022328029, now seen corresponding path program 2 times [2024-06-03 19:52:49,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:52:49,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530343950] [2024-06-03 19:52:49,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:52:49,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:52:49,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:52:50,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:52:50,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:52:50,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530343950] [2024-06-03 19:52:50,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530343950] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:52:50,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:52:50,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:52:50,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611682368] [2024-06-03 19:52:50,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:52:50,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:52:50,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:52:50,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:52:50,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:52:50,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-03 19:52:50,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 111 transitions, 901 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) [2024-06-03 19:52:50,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:52:50,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-03 19:52:50,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:52:52,552 INFO L124 PetriNetUnfolderBase]: 8600/12090 cut-off events. [2024-06-03 19:52:52,553 INFO L125 PetriNetUnfolderBase]: For 114311/114320 co-relation queries the response was YES. [2024-06-03 19:52:52,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55300 conditions, 12090 events. 8600/12090 cut-off events. For 114311/114320 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 66691 event pairs, 3158 based on Foata normal form. 8/12084 useless extension candidates. Maximal degree in co-relation 55264. Up to 11246 conditions per place. [2024-06-03 19:52:52,656 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 104 selfloop transitions, 55 changer transitions 0/166 dead transitions. [2024-06-03 19:52:52,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 166 transitions, 1527 flow [2024-06-03 19:52:52,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:52:52,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:52:52,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 214 transitions. [2024-06-03 19:52:52,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5144230769230769 [2024-06-03 19:52:52,658 INFO L175 Difference]: Start difference. First operand has 92 places, 111 transitions, 901 flow. Second operand 8 states and 214 transitions. [2024-06-03 19:52:52,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 166 transitions, 1527 flow [2024-06-03 19:52:52,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 166 transitions, 1439 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-03 19:52:52,795 INFO L231 Difference]: Finished difference. Result has 98 places, 119 transitions, 1076 flow [2024-06-03 19:52:52,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=815, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1076, PETRI_PLACES=98, PETRI_TRANSITIONS=119} [2024-06-03 19:52:52,797 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 43 predicate places. [2024-06-03 19:52:52,797 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 119 transitions, 1076 flow [2024-06-03 19:52:52,797 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) [2024-06-03 19:52:52,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:52:52,797 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:52:52,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-03 19:52:52,797 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)] === [2024-06-03 19:52:52,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:52:52,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1785855999, now seen corresponding path program 3 times [2024-06-03 19:52:52,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:52:52,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748419897] [2024-06-03 19:52:52,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:52:52,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:52:52,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:52:53,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:52:53,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:52:53,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748419897] [2024-06-03 19:52:53,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748419897] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:52:53,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:52:53,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:52:53,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18006098] [2024-06-03 19:52:53,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:52:53,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:52:53,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:52:53,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:52:53,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:52:53,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-03 19:52:53,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 119 transitions, 1076 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) [2024-06-03 19:52:54,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:52:54,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-03 19:52:54,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:52:55,664 INFO L124 PetriNetUnfolderBase]: 8585/12089 cut-off events. [2024-06-03 19:52:55,664 INFO L125 PetriNetUnfolderBase]: For 130003/130012 co-relation queries the response was YES. [2024-06-03 19:52:55,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57046 conditions, 12089 events. 8585/12089 cut-off events. For 130003/130012 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 66942 event pairs, 3538 based on Foata normal form. 8/12081 useless extension candidates. Maximal degree in co-relation 57008. Up to 11514 conditions per place. [2024-06-03 19:52:55,757 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 109 selfloop transitions, 44 changer transitions 0/160 dead transitions. [2024-06-03 19:52:55,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 160 transitions, 1495 flow [2024-06-03 19:52:55,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:52:55,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:52:55,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-03 19:52:55,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49759615384615385 [2024-06-03 19:52:55,759 INFO L175 Difference]: Start difference. First operand has 98 places, 119 transitions, 1076 flow. Second operand 8 states and 207 transitions. [2024-06-03 19:52:55,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 160 transitions, 1495 flow [2024-06-03 19:52:55,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 160 transitions, 1384 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-03 19:52:55,940 INFO L231 Difference]: Finished difference. Result has 103 places, 120 transitions, 1084 flow [2024-06-03 19:52:55,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=967, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1084, PETRI_PLACES=103, PETRI_TRANSITIONS=120} [2024-06-03 19:52:55,941 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 48 predicate places. [2024-06-03 19:52:55,941 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 120 transitions, 1084 flow [2024-06-03 19:52:55,942 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) [2024-06-03 19:52:55,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:52:55,942 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:52:55,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-03 19:52:55,942 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)] === [2024-06-03 19:52:55,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:52:55,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1409637700, now seen corresponding path program 2 times [2024-06-03 19:52:55,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:52:55,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376983553] [2024-06-03 19:52:55,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:52:55,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:52:55,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:52:56,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:52:56,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:52:56,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376983553] [2024-06-03 19:52:56,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376983553] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:52:56,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:52:56,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:52:56,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566040275] [2024-06-03 19:52:56,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:52:56,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:52:56,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:52:56,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:52:56,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:52:56,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-03 19:52:56,892 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 120 transitions, 1084 flow. Second operand has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:52:56,892 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:52:56,892 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-03 19:52:56,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:52:58,237 INFO L124 PetriNetUnfolderBase]: 8571/12081 cut-off events. [2024-06-03 19:52:58,237 INFO L125 PetriNetUnfolderBase]: For 141017/141032 co-relation queries the response was YES. [2024-06-03 19:52:58,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57797 conditions, 12081 events. 8571/12081 cut-off events. For 141017/141032 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 66804 event pairs, 3477 based on Foata normal form. 14/12088 useless extension candidates. Maximal degree in co-relation 57756. Up to 11685 conditions per place. [2024-06-03 19:52:58,332 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 112 selfloop transitions, 21 changer transitions 0/140 dead transitions. [2024-06-03 19:52:58,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 140 transitions, 1400 flow [2024-06-03 19:52:58,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:52:58,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:52:58,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-03 19:52:58,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47435897435897434 [2024-06-03 19:52:58,334 INFO L175 Difference]: Start difference. First operand has 103 places, 120 transitions, 1084 flow. Second operand 6 states and 148 transitions. [2024-06-03 19:52:58,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 140 transitions, 1400 flow [2024-06-03 19:52:58,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 140 transitions, 1276 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-03 19:52:58,497 INFO L231 Difference]: Finished difference. Result has 104 places, 120 transitions, 1011 flow [2024-06-03 19:52:58,497 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=960, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1011, PETRI_PLACES=104, PETRI_TRANSITIONS=120} [2024-06-03 19:52:58,498 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 49 predicate places. [2024-06-03 19:52:58,498 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 120 transitions, 1011 flow [2024-06-03 19:52:58,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:52:58,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:52:58,498 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:52:58,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-03 19:52:58,498 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:52:58,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:52:58,499 INFO L85 PathProgramCache]: Analyzing trace with hash -1415345668, now seen corresponding path program 1 times [2024-06-03 19:52:58,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:52:58,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329250845] [2024-06-03 19:52:58,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:52:58,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:52:58,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:52:59,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:52:59,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:52:59,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329250845] [2024-06-03 19:52:59,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329250845] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:52:59,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:52:59,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:52:59,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702203288] [2024-06-03 19:52:59,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:52:59,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:52:59,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:52:59,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:52:59,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:52:59,289 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-03 19:52:59,289 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 120 transitions, 1011 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) [2024-06-03 19:52:59,289 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:52:59,289 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-03 19:52:59,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:53:00,528 INFO L124 PetriNetUnfolderBase]: 7453/10807 cut-off events. [2024-06-03 19:53:00,528 INFO L125 PetriNetUnfolderBase]: For 129820/129820 co-relation queries the response was YES. [2024-06-03 19:53:00,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51581 conditions, 10807 events. 7453/10807 cut-off events. For 129820/129820 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 61750 event pairs, 2905 based on Foata normal form. 4/10802 useless extension candidates. Maximal degree in co-relation 51539. Up to 10202 conditions per place. [2024-06-03 19:53:00,616 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 125 selfloop transitions, 21 changer transitions 0/154 dead transitions. [2024-06-03 19:53:00,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 154 transitions, 1511 flow [2024-06-03 19:53:00,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:53:00,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:53:00,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 159 transitions. [2024-06-03 19:53:00,618 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5096153846153846 [2024-06-03 19:53:00,618 INFO L175 Difference]: Start difference. First operand has 104 places, 120 transitions, 1011 flow. Second operand 6 states and 159 transitions. [2024-06-03 19:53:00,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 154 transitions, 1511 flow [2024-06-03 19:53:00,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 154 transitions, 1452 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-03 19:53:00,776 INFO L231 Difference]: Finished difference. Result has 105 places, 128 transitions, 1091 flow [2024-06-03 19:53:00,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=952, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1091, PETRI_PLACES=105, PETRI_TRANSITIONS=128} [2024-06-03 19:53:00,777 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 50 predicate places. [2024-06-03 19:53:00,777 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 128 transitions, 1091 flow [2024-06-03 19:53:00,777 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) [2024-06-03 19:53:00,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:53:00,778 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:53:00,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-03 19:53:00,778 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:53:00,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:53:00,778 INFO L85 PathProgramCache]: Analyzing trace with hash -150366178, now seen corresponding path program 2 times [2024-06-03 19:53:00,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:53:00,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691272021] [2024-06-03 19:53:00,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:53:00,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:53:00,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:53:01,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:53:01,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:53:01,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691272021] [2024-06-03 19:53:01,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691272021] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:53:01,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:53:01,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:53:01,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774652246] [2024-06-03 19:53:01,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:53:01,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:53:01,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:53:01,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:53:01,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:53:01,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-03 19:53:01,577 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 128 transitions, 1091 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) [2024-06-03 19:53:01,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:53:01,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-03 19:53:01,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:53:02,906 INFO L124 PetriNetUnfolderBase]: 7439/10795 cut-off events. [2024-06-03 19:53:02,906 INFO L125 PetriNetUnfolderBase]: For 145976/145982 co-relation queries the response was YES. [2024-06-03 19:53:02,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53785 conditions, 10795 events. 7439/10795 cut-off events. For 145976/145982 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 61749 event pairs, 2888 based on Foata normal form. 8/10797 useless extension candidates. Maximal degree in co-relation 53742. Up to 10190 conditions per place. [2024-06-03 19:53:03,003 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 119 selfloop transitions, 21 changer transitions 0/148 dead transitions. [2024-06-03 19:53:03,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 148 transitions, 1421 flow [2024-06-03 19:53:03,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:53:03,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:53:03,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-03 19:53:03,004 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49038461538461536 [2024-06-03 19:53:03,004 INFO L175 Difference]: Start difference. First operand has 105 places, 128 transitions, 1091 flow. Second operand 6 states and 153 transitions. [2024-06-03 19:53:03,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 148 transitions, 1421 flow [2024-06-03 19:53:03,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 148 transitions, 1326 flow, removed 29 selfloop flow, removed 3 redundant places. [2024-06-03 19:53:03,149 INFO L231 Difference]: Finished difference. Result has 108 places, 128 transitions, 1047 flow [2024-06-03 19:53:03,149 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=996, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1047, PETRI_PLACES=108, PETRI_TRANSITIONS=128} [2024-06-03 19:53:03,149 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 53 predicate places. [2024-06-03 19:53:03,150 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 128 transitions, 1047 flow [2024-06-03 19:53:03,150 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) [2024-06-03 19:53:03,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:53:03,150 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:53:03,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-03 19:53:03,150 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:53:03,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:53:03,151 INFO L85 PathProgramCache]: Analyzing trace with hash -1103656260, now seen corresponding path program 1 times [2024-06-03 19:53:03,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:53:03,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75750723] [2024-06-03 19:53:03,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:53:03,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:53:03,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:53:04,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:53:04,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:53:04,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75750723] [2024-06-03 19:53:04,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75750723] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:53:04,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:53:04,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:53:04,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469830756] [2024-06-03 19:53:04,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:53:04,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:53:04,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:53:04,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:53:04,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:53:04,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-03 19:53:04,172 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 128 transitions, 1047 flow. Second operand has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:53:04,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:53:04,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-03 19:53:04,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:53:05,643 INFO L124 PetriNetUnfolderBase]: 8699/12293 cut-off events. [2024-06-03 19:53:05,644 INFO L125 PetriNetUnfolderBase]: For 186507/186513 co-relation queries the response was YES. [2024-06-03 19:53:05,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61994 conditions, 12293 events. 8699/12293 cut-off events. For 186507/186513 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 68326 event pairs, 3389 based on Foata normal form. 12/12292 useless extension candidates. Maximal degree in co-relation 61950. Up to 11483 conditions per place. [2024-06-03 19:53:05,747 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 129 selfloop transitions, 52 changer transitions 0/188 dead transitions. [2024-06-03 19:53:05,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 188 transitions, 1840 flow [2024-06-03 19:53:05,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:53:05,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:53:05,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 193 transitions. [2024-06-03 19:53:05,750 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5302197802197802 [2024-06-03 19:53:05,750 INFO L175 Difference]: Start difference. First operand has 108 places, 128 transitions, 1047 flow. Second operand 7 states and 193 transitions. [2024-06-03 19:53:05,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 188 transitions, 1840 flow [2024-06-03 19:53:05,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 188 transitions, 1785 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-03 19:53:05,963 INFO L231 Difference]: Finished difference. Result has 112 places, 146 transitions, 1350 flow [2024-06-03 19:53:05,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=992, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1350, PETRI_PLACES=112, PETRI_TRANSITIONS=146} [2024-06-03 19:53:05,963 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 57 predicate places. [2024-06-03 19:53:05,964 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 146 transitions, 1350 flow [2024-06-03 19:53:05,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:53:05,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:53:05,965 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:53:05,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-03 19:53:05,965 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)] === [2024-06-03 19:53:05,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:53:05,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1116657265, now seen corresponding path program 1 times [2024-06-03 19:53:05,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:53:05,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926709239] [2024-06-03 19:53:05,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:53:05,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:53:05,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:53:07,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:53:07,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:53:07,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926709239] [2024-06-03 19:53:07,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926709239] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:53:07,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:53:07,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:53:07,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501283284] [2024-06-03 19:53:07,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:53:07,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:53:07,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:53:07,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:53:07,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:53:07,223 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-03 19:53:07,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 146 transitions, 1350 flow. Second operand has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:53:07,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:53:07,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-03 19:53:07,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:53:08,885 INFO L124 PetriNetUnfolderBase]: 8941/12662 cut-off events. [2024-06-03 19:53:08,885 INFO L125 PetriNetUnfolderBase]: For 217629/217632 co-relation queries the response was YES. [2024-06-03 19:53:08,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67935 conditions, 12662 events. 8941/12662 cut-off events. For 217629/217632 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 71027 event pairs, 3495 based on Foata normal form. 18/12662 useless extension candidates. Maximal degree in co-relation 67888. Up to 11555 conditions per place. [2024-06-03 19:53:09,012 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 143 selfloop transitions, 53 changer transitions 0/203 dead transitions. [2024-06-03 19:53:09,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 203 transitions, 1977 flow [2024-06-03 19:53:09,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:53:09,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:53:09,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 212 transitions. [2024-06-03 19:53:09,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5096153846153846 [2024-06-03 19:53:09,025 INFO L175 Difference]: Start difference. First operand has 112 places, 146 transitions, 1350 flow. Second operand 8 states and 212 transitions. [2024-06-03 19:53:09,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 203 transitions, 1977 flow [2024-06-03 19:53:09,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 203 transitions, 1881 flow, removed 36 selfloop flow, removed 3 redundant places. [2024-06-03 19:53:09,273 INFO L231 Difference]: Finished difference. Result has 119 places, 155 transitions, 1521 flow [2024-06-03 19:53:09,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1258, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1521, PETRI_PLACES=119, PETRI_TRANSITIONS=155} [2024-06-03 19:53:09,274 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 64 predicate places. [2024-06-03 19:53:09,274 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 155 transitions, 1521 flow [2024-06-03 19:53:09,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:53:09,274 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:53:09,274 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:53:09,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-03 19:53:09,275 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:53:09,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:53:09,275 INFO L85 PathProgramCache]: Analyzing trace with hash -325189924, now seen corresponding path program 2 times [2024-06-03 19:53:09,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:53:09,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664307590] [2024-06-03 19:53:09,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:53:09,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:53:09,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:53:10,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:53:10,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:53:10,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664307590] [2024-06-03 19:53:10,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664307590] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:53:10,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:53:10,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:53:10,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988847976] [2024-06-03 19:53:10,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:53:10,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:53:10,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:53:10,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:53:10,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:53:10,223 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-03 19:53:10,224 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 155 transitions, 1521 flow. Second operand has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:53:10,224 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:53:10,224 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-03 19:53:10,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:53:12,047 INFO L124 PetriNetUnfolderBase]: 9107/12917 cut-off events. [2024-06-03 19:53:12,047 INFO L125 PetriNetUnfolderBase]: For 234469/234475 co-relation queries the response was YES. [2024-06-03 19:53:12,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70234 conditions, 12917 events. 9107/12917 cut-off events. For 234469/234475 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 72657 event pairs, 3437 based on Foata normal form. 12/12917 useless extension candidates. Maximal degree in co-relation 70184. Up to 11973 conditions per place. [2024-06-03 19:53:12,154 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 136 selfloop transitions, 58 changer transitions 0/201 dead transitions. [2024-06-03 19:53:12,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 201 transitions, 2277 flow [2024-06-03 19:53:12,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:53:12,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:53:12,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 187 transitions. [2024-06-03 19:53:12,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5137362637362637 [2024-06-03 19:53:12,172 INFO L175 Difference]: Start difference. First operand has 119 places, 155 transitions, 1521 flow. Second operand 7 states and 187 transitions. [2024-06-03 19:53:12,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 201 transitions, 2277 flow [2024-06-03 19:53:12,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 201 transitions, 2189 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-03 19:53:12,392 INFO L231 Difference]: Finished difference. Result has 124 places, 165 transitions, 1701 flow [2024-06-03 19:53:12,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1433, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1701, PETRI_PLACES=124, PETRI_TRANSITIONS=165} [2024-06-03 19:53:12,399 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 69 predicate places. [2024-06-03 19:53:12,399 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 165 transitions, 1701 flow [2024-06-03 19:53:12,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:53:12,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:53:12,400 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:53:12,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-03 19:53:12,400 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)] === [2024-06-03 19:53:12,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:53:12,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1386858293, now seen corresponding path program 2 times [2024-06-03 19:53:12,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:53:12,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202955744] [2024-06-03 19:53:12,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:53:12,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:53:12,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:53:13,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:53:13,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:53:13,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202955744] [2024-06-03 19:53:13,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202955744] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:53:13,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:53:13,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:53:13,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018512271] [2024-06-03 19:53:13,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:53:13,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:53:13,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:53:13,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:53:13,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:53:13,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-03 19:53:13,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 165 transitions, 1701 flow. Second operand has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:53:13,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:53:13,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-03 19:53:13,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:53:15,036 INFO L124 PetriNetUnfolderBase]: 9068/12837 cut-off events. [2024-06-03 19:53:15,042 INFO L125 PetriNetUnfolderBase]: For 251148/251151 co-relation queries the response was YES. [2024-06-03 19:53:15,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70567 conditions, 12837 events. 9068/12837 cut-off events. For 251148/251151 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 71917 event pairs, 2539 based on Foata normal form. 18/12827 useless extension candidates. Maximal degree in co-relation 70515. Up to 11036 conditions per place. [2024-06-03 19:53:15,147 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 139 selfloop transitions, 61 changer transitions 0/207 dead transitions. [2024-06-03 19:53:15,148 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 207 transitions, 2219 flow [2024-06-03 19:53:15,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:53:15,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:53:15,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 189 transitions. [2024-06-03 19:53:15,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5192307692307693 [2024-06-03 19:53:15,150 INFO L175 Difference]: Start difference. First operand has 124 places, 165 transitions, 1701 flow. Second operand 7 states and 189 transitions. [2024-06-03 19:53:15,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 207 transitions, 2219 flow [2024-06-03 19:53:15,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 207 transitions, 2099 flow, removed 28 selfloop flow, removed 3 redundant places. [2024-06-03 19:53:15,505 INFO L231 Difference]: Finished difference. Result has 128 places, 165 transitions, 1716 flow [2024-06-03 19:53:15,505 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1581, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1716, PETRI_PLACES=128, PETRI_TRANSITIONS=165} [2024-06-03 19:53:15,505 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 73 predicate places. [2024-06-03 19:53:15,506 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 165 transitions, 1716 flow [2024-06-03 19:53:15,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:53:15,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:53:15,506 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:53:15,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-03 19:53:15,506 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)] === [2024-06-03 19:53:15,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:53:15,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1652555573, now seen corresponding path program 3 times [2024-06-03 19:53:15,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:53:15,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489329815] [2024-06-03 19:53:15,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:53:15,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:53:15,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:53:16,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:53:16,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:53:16,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489329815] [2024-06-03 19:53:16,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489329815] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:53:16,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:53:16,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:53:16,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977480214] [2024-06-03 19:53:16,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:53:16,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:53:16,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:53:16,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:53:16,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:53:16,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-03 19:53:16,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 165 transitions, 1716 flow. Second operand has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:53:16,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:53:16,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-03 19:53:16,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:53:18,070 INFO L124 PetriNetUnfolderBase]: 9029/12793 cut-off events. [2024-06-03 19:53:18,071 INFO L125 PetriNetUnfolderBase]: For 266290/266299 co-relation queries the response was YES. [2024-06-03 19:53:18,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70741 conditions, 12793 events. 9029/12793 cut-off events. For 266290/266299 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 71699 event pairs, 2137 based on Foata normal form. 19/12787 useless extension candidates. Maximal degree in co-relation 70688. Up to 10797 conditions per place. [2024-06-03 19:53:18,181 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 133 selfloop transitions, 63 changer transitions 0/203 dead transitions. [2024-06-03 19:53:18,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 203 transitions, 2220 flow [2024-06-03 19:53:18,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:53:18,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:53:18,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-03 19:53:18,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-03 19:53:18,182 INFO L175 Difference]: Start difference. First operand has 128 places, 165 transitions, 1716 flow. Second operand 7 states and 182 transitions. [2024-06-03 19:53:18,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 203 transitions, 2220 flow [2024-06-03 19:53:18,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 203 transitions, 2058 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-03 19:53:18,441 INFO L231 Difference]: Finished difference. Result has 128 places, 166 transitions, 1699 flow [2024-06-03 19:53:18,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1522, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1699, PETRI_PLACES=128, PETRI_TRANSITIONS=166} [2024-06-03 19:53:18,442 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 73 predicate places. [2024-06-03 19:53:18,442 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 166 transitions, 1699 flow [2024-06-03 19:53:18,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:53:18,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:53:18,442 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:53:18,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-03 19:53:18,442 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:53:18,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:53:18,443 INFO L85 PathProgramCache]: Analyzing trace with hash -749094690, now seen corresponding path program 3 times [2024-06-03 19:53:18,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:53:18,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035127659] [2024-06-03 19:53:18,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:53:18,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:53:18,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:53:19,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:53:19,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:53:19,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035127659] [2024-06-03 19:53:19,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035127659] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:53:19,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:53:19,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:53:19,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176013922] [2024-06-03 19:53:19,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:53:19,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:53:19,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:53:19,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:53:19,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:53:19,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-03 19:53:19,382 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 166 transitions, 1699 flow. Second operand has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:53:19,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:53:19,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-03 19:53:19,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:53:21,171 INFO L124 PetriNetUnfolderBase]: 9011/12785 cut-off events. [2024-06-03 19:53:21,171 INFO L125 PetriNetUnfolderBase]: For 263827/263848 co-relation queries the response was YES. [2024-06-03 19:53:21,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70955 conditions, 12785 events. 9011/12785 cut-off events. For 263827/263848 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 71929 event pairs, 3423 based on Foata normal form. 19/12787 useless extension candidates. Maximal degree in co-relation 70901. Up to 11851 conditions per place. [2024-06-03 19:53:21,295 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 130 selfloop transitions, 58 changer transitions 0/195 dead transitions. [2024-06-03 19:53:21,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 195 transitions, 2321 flow [2024-06-03 19:53:21,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:53:21,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:53:21,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-03 19:53:21,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4945054945054945 [2024-06-03 19:53:21,297 INFO L175 Difference]: Start difference. First operand has 128 places, 166 transitions, 1699 flow. Second operand 7 states and 180 transitions. [2024-06-03 19:53:21,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 195 transitions, 2321 flow [2024-06-03 19:53:21,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 195 transitions, 2146 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-03 19:53:21,604 INFO L231 Difference]: Finished difference. Result has 130 places, 166 transitions, 1651 flow [2024-06-03 19:53:21,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1524, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1651, PETRI_PLACES=130, PETRI_TRANSITIONS=166} [2024-06-03 19:53:21,605 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 75 predicate places. [2024-06-03 19:53:21,605 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 166 transitions, 1651 flow [2024-06-03 19:53:21,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:53:21,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:53:21,606 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:53:21,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-03 19:53:21,606 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:53:21,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:53:21,606 INFO L85 PathProgramCache]: Analyzing trace with hash -1816129354, now seen corresponding path program 1 times [2024-06-03 19:53:21,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:53:21,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820838315] [2024-06-03 19:53:21,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:53:21,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:53:21,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:53:22,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:53:22,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:53:22,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820838315] [2024-06-03 19:53:22,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820838315] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:53:22,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:53:22,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:53:22,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142938748] [2024-06-03 19:53:22,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:53:22,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:53:22,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:53:22,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:53:22,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:53:22,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-03 19:53:22,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 166 transitions, 1651 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:53:22,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:53:22,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-03 19:53:22,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:53:24,271 INFO L124 PetriNetUnfolderBase]: 7893/11484 cut-off events. [2024-06-03 19:53:24,271 INFO L125 PetriNetUnfolderBase]: For 235307/235307 co-relation queries the response was YES. [2024-06-03 19:53:24,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63115 conditions, 11484 events. 7893/11484 cut-off events. For 235307/235307 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 66498 event pairs, 2912 based on Foata normal form. 4/11482 useless extension candidates. Maximal degree in co-relation 63060. Up to 10846 conditions per place. [2024-06-03 19:53:24,370 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 173 selfloop transitions, 18 changer transitions 0/199 dead transitions. [2024-06-03 19:53:24,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 199 transitions, 2159 flow [2024-06-03 19:53:24,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:53:24,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:53:24,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-03 19:53:24,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48626373626373626 [2024-06-03 19:53:24,372 INFO L175 Difference]: Start difference. First operand has 130 places, 166 transitions, 1651 flow. Second operand 7 states and 177 transitions. [2024-06-03 19:53:24,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 199 transitions, 2159 flow [2024-06-03 19:53:24,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 199 transitions, 2002 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-03 19:53:24,738 INFO L231 Difference]: Finished difference. Result has 131 places, 170 transitions, 1599 flow [2024-06-03 19:53:24,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1494, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1599, PETRI_PLACES=131, PETRI_TRANSITIONS=170} [2024-06-03 19:53:24,738 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 76 predicate places. [2024-06-03 19:53:24,738 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 170 transitions, 1599 flow [2024-06-03 19:53:24,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:53:24,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:53:24,739 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:53:24,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-03 19:53:24,739 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:53:24,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:53:24,740 INFO L85 PathProgramCache]: Analyzing trace with hash -926041512, now seen corresponding path program 2 times [2024-06-03 19:53:24,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:53:24,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250700617] [2024-06-03 19:53:24,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:53:24,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:53:24,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:53:25,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:53:25,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:53:25,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250700617] [2024-06-03 19:53:25,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250700617] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:53:25,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:53:25,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:53:25,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505331833] [2024-06-03 19:53:25,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:53:25,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:53:25,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:53:25,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:53:25,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:53:25,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-03 19:53:25,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 170 transitions, 1599 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:53:25,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:53:25,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-03 19:53:25,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:53:27,267 INFO L124 PetriNetUnfolderBase]: 7925/11555 cut-off events. [2024-06-03 19:53:27,268 INFO L125 PetriNetUnfolderBase]: For 254394/254394 co-relation queries the response was YES. [2024-06-03 19:53:27,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64803 conditions, 11555 events. 7925/11555 cut-off events. For 254394/254394 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 67018 event pairs, 2860 based on Foata normal form. 4/11548 useless extension candidates. Maximal degree in co-relation 64749. Up to 10777 conditions per place. [2024-06-03 19:53:27,373 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 166 selfloop transitions, 35 changer transitions 0/209 dead transitions. [2024-06-03 19:53:27,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 209 transitions, 2293 flow [2024-06-03 19:53:27,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:53:27,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:53:27,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-03 19:53:27,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5027472527472527 [2024-06-03 19:53:27,377 INFO L175 Difference]: Start difference. First operand has 131 places, 170 transitions, 1599 flow. Second operand 7 states and 183 transitions. [2024-06-03 19:53:27,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 209 transitions, 2293 flow [2024-06-03 19:53:27,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 209 transitions, 2218 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-03 19:53:27,668 INFO L231 Difference]: Finished difference. Result has 133 places, 178 transitions, 1731 flow [2024-06-03 19:53:27,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1524, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1731, PETRI_PLACES=133, PETRI_TRANSITIONS=178} [2024-06-03 19:53:27,668 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 78 predicate places. [2024-06-03 19:53:27,669 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 178 transitions, 1731 flow [2024-06-03 19:53:27,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:53:27,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:53:27,669 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:53:27,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-03 19:53:27,669 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)] === [2024-06-03 19:53:27,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:53:27,670 INFO L85 PathProgramCache]: Analyzing trace with hash -366382986, now seen corresponding path program 3 times [2024-06-03 19:53:27,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:53:27,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013363498] [2024-06-03 19:53:27,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:53:27,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:53:27,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:53:28,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:53:28,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:53:28,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013363498] [2024-06-03 19:53:28,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013363498] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:53:28,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:53:28,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:53:28,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296041014] [2024-06-03 19:53:28,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:53:28,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:53:28,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:53:28,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:53:28,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:53:28,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-03 19:53:28,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 178 transitions, 1731 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:53:28,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:53:28,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-03 19:53:28,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:53:30,237 INFO L124 PetriNetUnfolderBase]: 7911/11539 cut-off events. [2024-06-03 19:53:30,237 INFO L125 PetriNetUnfolderBase]: For 277084/277087 co-relation queries the response was YES. [2024-06-03 19:53:30,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66910 conditions, 11539 events. 7911/11539 cut-off events. For 277084/277087 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 66972 event pairs, 2830 based on Foata normal form. 4/11535 useless extension candidates. Maximal degree in co-relation 66855. Up to 10765 conditions per place. [2024-06-03 19:53:30,552 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 160 selfloop transitions, 35 changer transitions 0/203 dead transitions. [2024-06-03 19:53:30,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 203 transitions, 2183 flow [2024-06-03 19:53:30,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:53:30,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:53:30,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-03 19:53:30,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48626373626373626 [2024-06-03 19:53:30,553 INFO L175 Difference]: Start difference. First operand has 133 places, 178 transitions, 1731 flow. Second operand 7 states and 177 transitions. [2024-06-03 19:53:30,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 203 transitions, 2183 flow [2024-06-03 19:53:30,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 203 transitions, 2075 flow, removed 44 selfloop flow, removed 3 redundant places. [2024-06-03 19:53:30,842 INFO L231 Difference]: Finished difference. Result has 137 places, 178 transitions, 1702 flow [2024-06-03 19:53:30,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1623, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1702, PETRI_PLACES=137, PETRI_TRANSITIONS=178} [2024-06-03 19:53:30,843 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 82 predicate places. [2024-06-03 19:53:30,843 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 178 transitions, 1702 flow [2024-06-03 19:53:30,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:53:30,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:53:30,844 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:53:30,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-03 19:53:30,844 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:53:30,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:53:30,845 INFO L85 PathProgramCache]: Analyzing trace with hash -1612890072, now seen corresponding path program 1 times [2024-06-03 19:53:30,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:53:30,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893843228] [2024-06-03 19:53:30,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:53:30,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:53:30,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:53:32,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:53:32,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:53:32,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893843228] [2024-06-03 19:53:32,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893843228] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:53:32,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:53:32,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:53:32,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648684287] [2024-06-03 19:53:32,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:53:32,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:53:32,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:53:32,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:53:32,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:53:32,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-03 19:53:32,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 178 transitions, 1702 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:53:32,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:53:32,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-03 19:53:32,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:53:33,830 INFO L124 PetriNetUnfolderBase]: 7899/11522 cut-off events. [2024-06-03 19:53:33,830 INFO L125 PetriNetUnfolderBase]: For 292250/292250 co-relation queries the response was YES. [2024-06-03 19:53:33,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66966 conditions, 11522 events. 7899/11522 cut-off events. For 292250/292250 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 66933 event pairs, 2838 based on Foata normal form. 4/11522 useless extension candidates. Maximal degree in co-relation 66909. Up to 10866 conditions per place. [2024-06-03 19:53:33,940 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 183 selfloop transitions, 17 changer transitions 0/208 dead transitions. [2024-06-03 19:53:33,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 208 transitions, 2256 flow [2024-06-03 19:53:33,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:53:33,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:53:33,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-03 19:53:33,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46703296703296704 [2024-06-03 19:53:33,942 INFO L175 Difference]: Start difference. First operand has 137 places, 178 transitions, 1702 flow. Second operand 7 states and 170 transitions. [2024-06-03 19:53:33,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 208 transitions, 2256 flow [2024-06-03 19:53:34,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 208 transitions, 2139 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-03 19:53:34,257 INFO L231 Difference]: Finished difference. Result has 138 places, 185 transitions, 1736 flow [2024-06-03 19:53:34,257 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1592, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1736, PETRI_PLACES=138, PETRI_TRANSITIONS=185} [2024-06-03 19:53:34,258 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 83 predicate places. [2024-06-03 19:53:34,258 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 185 transitions, 1736 flow [2024-06-03 19:53:34,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:53:34,258 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:53:34,258 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:53:34,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-03 19:53:34,259 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:53:34,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:53:34,259 INFO L85 PathProgramCache]: Analyzing trace with hash -1620762477, now seen corresponding path program 1 times [2024-06-03 19:53:34,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:53:34,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525501917] [2024-06-03 19:53:34,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:53:34,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:53:34,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:53:35,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:53:35,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:53:35,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525501917] [2024-06-03 19:53:35,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525501917] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:53:35,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:53:35,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 19:53:35,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211045145] [2024-06-03 19:53:35,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:53:35,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 19:53:35,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:53:35,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 19:53:35,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-03 19:53:35,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 52 [2024-06-03 19:53:35,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 185 transitions, 1736 flow. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:53:35,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:53:35,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 52 [2024-06-03 19:53:35,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:53:36,720 INFO L124 PetriNetUnfolderBase]: 7492/11174 cut-off events. [2024-06-03 19:53:36,720 INFO L125 PetriNetUnfolderBase]: For 304697/304833 co-relation queries the response was YES. [2024-06-03 19:53:36,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67553 conditions, 11174 events. 7492/11174 cut-off events. For 304697/304833 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 67460 event pairs, 2662 based on Foata normal form. 1/11067 useless extension candidates. Maximal degree in co-relation 67495. Up to 10231 conditions per place. [2024-06-03 19:53:36,818 INFO L140 encePairwiseOnDemand]: 44/52 looper letters, 170 selfloop transitions, 10 changer transitions 0/200 dead transitions. [2024-06-03 19:53:36,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 200 transitions, 2178 flow [2024-06-03 19:53:36,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 19:53:36,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 19:53:36,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 126 transitions. [2024-06-03 19:53:36,819 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4846153846153846 [2024-06-03 19:53:36,820 INFO L175 Difference]: Start difference. First operand has 138 places, 185 transitions, 1736 flow. Second operand 5 states and 126 transitions. [2024-06-03 19:53:36,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 200 transitions, 2178 flow [2024-06-03 19:53:37,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 200 transitions, 2096 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-03 19:53:37,177 INFO L231 Difference]: Finished difference. Result has 139 places, 189 transitions, 1743 flow [2024-06-03 19:53:37,177 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1654, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1743, PETRI_PLACES=139, PETRI_TRANSITIONS=189} [2024-06-03 19:53:37,178 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 84 predicate places. [2024-06-03 19:53:37,178 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 189 transitions, 1743 flow [2024-06-03 19:53:37,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:53:37,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:53:37,178 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:53:37,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-03 19:53:37,179 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:53:37,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:53:37,179 INFO L85 PathProgramCache]: Analyzing trace with hash -1496661923, now seen corresponding path program 1 times [2024-06-03 19:53:37,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:53:37,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097921098] [2024-06-03 19:53:37,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:53:37,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:53:37,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:53:37,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:53:37,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:53:37,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097921098] [2024-06-03 19:53:37,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097921098] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:53:37,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:53:37,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:53:37,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526484414] [2024-06-03 19:53:37,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:53:37,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:53:37,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:53:37,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:53:37,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:53:38,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-03 19:53:38,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 189 transitions, 1743 flow. Second operand has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:53:38,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:53:38,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-03 19:53:38,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:53:39,907 INFO L124 PetriNetUnfolderBase]: 9197/13021 cut-off events. [2024-06-03 19:53:39,907 INFO L125 PetriNetUnfolderBase]: For 396321/396330 co-relation queries the response was YES. [2024-06-03 19:53:39,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81772 conditions, 13021 events. 9197/13021 cut-off events. For 396321/396330 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 72874 event pairs, 3364 based on Foata normal form. 12/13024 useless extension candidates. Maximal degree in co-relation 81713. Up to 11993 conditions per place. [2024-06-03 19:53:40,053 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 159 selfloop transitions, 75 changer transitions 0/241 dead transitions. [2024-06-03 19:53:40,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 241 transitions, 2703 flow [2024-06-03 19:53:40,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:53:40,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:53:40,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 189 transitions. [2024-06-03 19:53:40,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5192307692307693 [2024-06-03 19:53:40,057 INFO L175 Difference]: Start difference. First operand has 139 places, 189 transitions, 1743 flow. Second operand 7 states and 189 transitions. [2024-06-03 19:53:40,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 241 transitions, 2703 flow [2024-06-03 19:53:40,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 241 transitions, 2642 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-06-03 19:53:40,675 INFO L231 Difference]: Finished difference. Result has 144 places, 202 transitions, 2036 flow [2024-06-03 19:53:40,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1682, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2036, PETRI_PLACES=144, PETRI_TRANSITIONS=202} [2024-06-03 19:53:40,675 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 89 predicate places. [2024-06-03 19:53:40,675 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 202 transitions, 2036 flow [2024-06-03 19:53:40,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:53:40,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:53:40,676 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:53:40,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-03 19:53:40,676 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:53:40,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:53:40,677 INFO L85 PathProgramCache]: Analyzing trace with hash -531563397, now seen corresponding path program 2 times [2024-06-03 19:53:40,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:53:40,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092675013] [2024-06-03 19:53:40,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:53:40,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:53:40,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:53:41,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:53:41,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:53:41,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092675013] [2024-06-03 19:53:41,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092675013] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:53:41,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:53:41,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:53:41,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839475158] [2024-06-03 19:53:41,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:53:41,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:53:41,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:53:41,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:53:41,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:53:41,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-03 19:53:41,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 202 transitions, 2036 flow. Second operand has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:53:41,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:53:41,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-03 19:53:41,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:53:43,572 INFO L124 PetriNetUnfolderBase]: 9169/12976 cut-off events. [2024-06-03 19:53:43,573 INFO L125 PetriNetUnfolderBase]: For 415458/415467 co-relation queries the response was YES. [2024-06-03 19:53:43,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83015 conditions, 12976 events. 9169/12976 cut-off events. For 415458/415467 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 72496 event pairs, 3320 based on Foata normal form. 12/12979 useless extension candidates. Maximal degree in co-relation 82954. Up to 11973 conditions per place. [2024-06-03 19:53:43,740 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 160 selfloop transitions, 71 changer transitions 0/238 dead transitions. [2024-06-03 19:53:43,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 238 transitions, 2822 flow [2024-06-03 19:53:43,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:53:43,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:53:43,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 186 transitions. [2024-06-03 19:53:43,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.510989010989011 [2024-06-03 19:53:43,756 INFO L175 Difference]: Start difference. First operand has 144 places, 202 transitions, 2036 flow. Second operand 7 states and 186 transitions. [2024-06-03 19:53:43,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 238 transitions, 2822 flow [2024-06-03 19:53:44,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 238 transitions, 2695 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-03 19:53:44,385 INFO L231 Difference]: Finished difference. Result has 147 places, 202 transitions, 2063 flow [2024-06-03 19:53:44,386 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1909, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2063, PETRI_PLACES=147, PETRI_TRANSITIONS=202} [2024-06-03 19:53:44,386 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 92 predicate places. [2024-06-03 19:53:44,386 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 202 transitions, 2063 flow [2024-06-03 19:53:44,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:53:44,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:53:44,387 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:53:44,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-03 19:53:44,387 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)] === [2024-06-03 19:53:44,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:53:44,387 INFO L85 PathProgramCache]: Analyzing trace with hash -473150565, now seen corresponding path program 3 times [2024-06-03 19:53:44,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:53:44,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004643824] [2024-06-03 19:53:44,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:53:44,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:53:44,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:53:45,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:53:45,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:53:45,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004643824] [2024-06-03 19:53:45,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004643824] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:53:45,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:53:45,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:53:45,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657827793] [2024-06-03 19:53:45,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:53:45,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:53:45,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:53:45,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:53:45,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:53:45,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-03 19:53:45,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 202 transitions, 2063 flow. Second operand has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:53:45,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:53:45,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-03 19:53:45,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:53:47,217 INFO L124 PetriNetUnfolderBase]: 9145/12927 cut-off events. [2024-06-03 19:53:47,218 INFO L125 PetriNetUnfolderBase]: For 437937/437949 co-relation queries the response was YES. [2024-06-03 19:53:47,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83428 conditions, 12927 events. 9145/12927 cut-off events. For 437937/437949 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 72245 event pairs, 3375 based on Foata normal form. 8/12915 useless extension candidates. Maximal degree in co-relation 83367. Up to 11953 conditions per place. [2024-06-03 19:53:47,365 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 153 selfloop transitions, 78 changer transitions 0/238 dead transitions. [2024-06-03 19:53:47,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 238 transitions, 2857 flow [2024-06-03 19:53:47,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:53:47,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:53:47,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 186 transitions. [2024-06-03 19:53:47,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.510989010989011 [2024-06-03 19:53:47,367 INFO L175 Difference]: Start difference. First operand has 147 places, 202 transitions, 2063 flow. Second operand 7 states and 186 transitions. [2024-06-03 19:53:47,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 238 transitions, 2857 flow [2024-06-03 19:53:47,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 238 transitions, 2708 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-03 19:53:47,999 INFO L231 Difference]: Finished difference. Result has 150 places, 202 transitions, 2079 flow [2024-06-03 19:53:47,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1914, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2079, PETRI_PLACES=150, PETRI_TRANSITIONS=202} [2024-06-03 19:53:48,000 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 95 predicate places. [2024-06-03 19:53:48,000 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 202 transitions, 2079 flow [2024-06-03 19:53:48,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:53:48,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:53:48,000 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:53:48,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-03 19:53:48,001 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:53:48,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:53:48,001 INFO L85 PathProgramCache]: Analyzing trace with hash -389433551, now seen corresponding path program 4 times [2024-06-03 19:53:48,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:53:48,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946170117] [2024-06-03 19:53:48,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:53:48,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:53:48,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:53:48,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:53:48,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:53:48,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946170117] [2024-06-03 19:53:48,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946170117] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:53:48,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:53:48,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:53:48,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075245371] [2024-06-03 19:53:48,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:53:48,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:53:48,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:53:48,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:53:48,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:53:48,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-03 19:53:48,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 202 transitions, 2079 flow. Second operand has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:53:48,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:53:48,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-03 19:53:48,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:53:50,803 INFO L124 PetriNetUnfolderBase]: 9177/12969 cut-off events. [2024-06-03 19:53:50,804 INFO L125 PetriNetUnfolderBase]: For 461825/461831 co-relation queries the response was YES. [2024-06-03 19:53:50,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84534 conditions, 12969 events. 9177/12969 cut-off events. For 461825/461831 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 72474 event pairs, 3377 based on Foata normal form. 4/12953 useless extension candidates. Maximal degree in co-relation 84472. Up to 11972 conditions per place. [2024-06-03 19:53:50,974 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 148 selfloop transitions, 82 changer transitions 0/237 dead transitions. [2024-06-03 19:53:50,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 237 transitions, 2814 flow [2024-06-03 19:53:50,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:53:50,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:53:50,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-03 19:53:50,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-03 19:53:50,976 INFO L175 Difference]: Start difference. First operand has 150 places, 202 transitions, 2079 flow. Second operand 7 states and 182 transitions. [2024-06-03 19:53:50,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 237 transitions, 2814 flow [2024-06-03 19:53:51,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 237 transitions, 2473 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-03 19:53:51,586 INFO L231 Difference]: Finished difference. Result has 148 places, 206 transitions, 1980 flow [2024-06-03 19:53:51,586 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1757, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1980, PETRI_PLACES=148, PETRI_TRANSITIONS=206} [2024-06-03 19:53:51,587 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 93 predicate places. [2024-06-03 19:53:51,587 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 206 transitions, 1980 flow [2024-06-03 19:53:51,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:53:51,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:53:51,587 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:53:51,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-03 19:53:51,588 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:53:51,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:53:51,588 INFO L85 PathProgramCache]: Analyzing trace with hash -2121828769, now seen corresponding path program 5 times [2024-06-03 19:53:51,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:53:51,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648072033] [2024-06-03 19:53:51,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:53:51,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:53:51,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:53:52,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:53:52,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:53:52,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648072033] [2024-06-03 19:53:52,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648072033] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:53:52,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:53:52,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:53:52,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908266993] [2024-06-03 19:53:52,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:53:52,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:53:52,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:53:52,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:53:52,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:53:52,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-03 19:53:52,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 206 transitions, 1980 flow. Second operand has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:53:52,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:53:52,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-03 19:53:52,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:53:54,341 INFO L124 PetriNetUnfolderBase]: 9149/12950 cut-off events. [2024-06-03 19:53:54,341 INFO L125 PetriNetUnfolderBase]: For 480927/480951 co-relation queries the response was YES. [2024-06-03 19:53:54,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84426 conditions, 12950 events. 9149/12950 cut-off events. For 480927/480951 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 72456 event pairs, 3346 based on Foata normal form. 22/12955 useless extension candidates. Maximal degree in co-relation 84364. Up to 11952 conditions per place. [2024-06-03 19:53:54,516 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 153 selfloop transitions, 73 changer transitions 0/233 dead transitions. [2024-06-03 19:53:54,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 233 transitions, 2630 flow [2024-06-03 19:53:54,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:53:54,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:53:54,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-03 19:53:54,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.489010989010989 [2024-06-03 19:53:54,521 INFO L175 Difference]: Start difference. First operand has 148 places, 206 transitions, 1980 flow. Second operand 7 states and 178 transitions. [2024-06-03 19:53:54,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 233 transitions, 2630 flow [2024-06-03 19:53:55,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 233 transitions, 2470 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-03 19:53:55,279 INFO L231 Difference]: Finished difference. Result has 151 places, 206 transitions, 1977 flow [2024-06-03 19:53:55,280 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1820, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1977, PETRI_PLACES=151, PETRI_TRANSITIONS=206} [2024-06-03 19:53:55,280 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 96 predicate places. [2024-06-03 19:53:55,280 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 206 transitions, 1977 flow [2024-06-03 19:53:55,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:53:55,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:53:55,281 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:53:55,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-03 19:53:55,281 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)] === [2024-06-03 19:53:55,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:53:55,281 INFO L85 PathProgramCache]: Analyzing trace with hash -1175311583, now seen corresponding path program 6 times [2024-06-03 19:53:55,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:53:55,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51599471] [2024-06-03 19:53:55,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:53:55,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:53:55,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:53:56,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:53:56,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:53:56,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51599471] [2024-06-03 19:53:56,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51599471] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:53:56,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:53:56,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:53:56,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135673641] [2024-06-03 19:53:56,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:53:56,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:53:56,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:53:56,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:53:56,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:53:56,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-03 19:53:56,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 206 transitions, 1977 flow. Second operand has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:53:56,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:53:56,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-03 19:53:56,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:53:58,043 INFO L124 PetriNetUnfolderBase]: 9125/12909 cut-off events. [2024-06-03 19:53:58,043 INFO L125 PetriNetUnfolderBase]: For 501855/501873 co-relation queries the response was YES. [2024-06-03 19:53:58,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84816 conditions, 12909 events. 9125/12909 cut-off events. For 501855/501873 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 72215 event pairs, 3346 based on Foata normal form. 14/12906 useless extension candidates. Maximal degree in co-relation 84753. Up to 11932 conditions per place. [2024-06-03 19:53:58,201 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 147 selfloop transitions, 77 changer transitions 0/231 dead transitions. [2024-06-03 19:53:58,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 231 transitions, 2493 flow [2024-06-03 19:53:58,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:53:58,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:53:58,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-03 19:53:58,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4807692307692308 [2024-06-03 19:53:58,203 INFO L175 Difference]: Start difference. First operand has 151 places, 206 transitions, 1977 flow. Second operand 7 states and 175 transitions. [2024-06-03 19:53:58,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 231 transitions, 2493 flow [2024-06-03 19:53:58,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 231 transitions, 2353 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-03 19:53:58,809 INFO L231 Difference]: Finished difference. Result has 154 places, 206 transitions, 2000 flow [2024-06-03 19:53:58,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1837, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2000, PETRI_PLACES=154, PETRI_TRANSITIONS=206} [2024-06-03 19:53:58,810 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 99 predicate places. [2024-06-03 19:53:58,810 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 206 transitions, 2000 flow [2024-06-03 19:53:58,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:53:58,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:53:58,810 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:53:58,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-03 19:53:58,810 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)] === [2024-06-03 19:53:58,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:53:58,811 INFO L85 PathProgramCache]: Analyzing trace with hash 639155353, now seen corresponding path program 1 times [2024-06-03 19:53:58,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:53:58,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607405673] [2024-06-03 19:53:58,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:53:58,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:53:58,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:53:59,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:53:59,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:53:59,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607405673] [2024-06-03 19:53:59,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607405673] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:53:59,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:53:59,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:53:59,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123551724] [2024-06-03 19:53:59,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:53:59,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:53:59,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:53:59,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:53:59,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:53:59,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-03 19:53:59,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 206 transitions, 2000 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:53:59,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:53:59,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-03 19:53:59,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:54:01,909 INFO L124 PetriNetUnfolderBase]: 10531/14963 cut-off events. [2024-06-03 19:54:01,910 INFO L125 PetriNetUnfolderBase]: For 585297/585318 co-relation queries the response was YES. [2024-06-03 19:54:02,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97837 conditions, 14963 events. 10531/14963 cut-off events. For 585297/585318 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 85530 event pairs, 3415 based on Foata normal form. 48/15002 useless extension candidates. Maximal degree in co-relation 97773. Up to 12710 conditions per place. [2024-06-03 19:54:02,098 INFO L140 encePairwiseOnDemand]: 37/52 looper letters, 205 selfloop transitions, 154 changer transitions 0/366 dead transitions. [2024-06-03 19:54:02,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 366 transitions, 4185 flow [2024-06-03 19:54:02,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:54:02,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:54:02,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 248 transitions. [2024-06-03 19:54:02,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5299145299145299 [2024-06-03 19:54:02,100 INFO L175 Difference]: Start difference. First operand has 154 places, 206 transitions, 2000 flow. Second operand 9 states and 248 transitions. [2024-06-03 19:54:02,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 366 transitions, 4185 flow [2024-06-03 19:54:03,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 366 transitions, 3735 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-03 19:54:03,333 INFO L231 Difference]: Finished difference. Result has 159 places, 294 transitions, 3085 flow [2024-06-03 19:54:03,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1772, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3085, PETRI_PLACES=159, PETRI_TRANSITIONS=294} [2024-06-03 19:54:03,334 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 104 predicate places. [2024-06-03 19:54:03,334 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 294 transitions, 3085 flow [2024-06-03 19:54:03,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:54:03,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:54:03,334 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:54:03,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-03 19:54:03,335 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:54:03,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:54:03,335 INFO L85 PathProgramCache]: Analyzing trace with hash 729672057, now seen corresponding path program 2 times [2024-06-03 19:54:03,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:54:03,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532721704] [2024-06-03 19:54:03,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:54:03,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:54:03,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:54:04,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:54:04,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:54:04,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532721704] [2024-06-03 19:54:04,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532721704] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:54:04,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:54:04,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:54:04,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608667869] [2024-06-03 19:54:04,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:54:04,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:54:04,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:54:04,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:54:04,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:54:04,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-03 19:54:04,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 294 transitions, 3085 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:54:04,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:54:04,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-03 19:54:04,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:54:06,890 INFO L124 PetriNetUnfolderBase]: 11011/15656 cut-off events. [2024-06-03 19:54:06,890 INFO L125 PetriNetUnfolderBase]: For 655696/655721 co-relation queries the response was YES. [2024-06-03 19:54:07,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107368 conditions, 15656 events. 11011/15656 cut-off events. For 655696/655721 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 89910 event pairs, 2919 based on Foata normal form. 52/15699 useless extension candidates. Maximal degree in co-relation 107299. Up to 12653 conditions per place. [2024-06-03 19:54:07,178 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 176 selfloop transitions, 175 changer transitions 0/358 dead transitions. [2024-06-03 19:54:07,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 358 transitions, 4281 flow [2024-06-03 19:54:07,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:54:07,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:54:07,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 220 transitions. [2024-06-03 19:54:07,180 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5288461538461539 [2024-06-03 19:54:07,181 INFO L175 Difference]: Start difference. First operand has 159 places, 294 transitions, 3085 flow. Second operand 8 states and 220 transitions. [2024-06-03 19:54:07,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 358 transitions, 4281 flow [2024-06-03 19:54:08,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 358 transitions, 4226 flow, removed 17 selfloop flow, removed 2 redundant places. [2024-06-03 19:54:08,493 INFO L231 Difference]: Finished difference. Result has 166 places, 302 transitions, 3585 flow [2024-06-03 19:54:08,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3030, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3585, PETRI_PLACES=166, PETRI_TRANSITIONS=302} [2024-06-03 19:54:08,494 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 111 predicate places. [2024-06-03 19:54:08,494 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 302 transitions, 3585 flow [2024-06-03 19:54:08,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:54:08,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:54:08,495 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:54:08,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-03 19:54:08,495 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:54:08,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:54:08,495 INFO L85 PathProgramCache]: Analyzing trace with hash 2053201425, now seen corresponding path program 3 times [2024-06-03 19:54:08,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:54:08,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514821801] [2024-06-03 19:54:08,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:54:08,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:54:08,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:54:09,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:54:09,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:54:09,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514821801] [2024-06-03 19:54:09,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514821801] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:54:09,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:54:09,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:54:09,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166808694] [2024-06-03 19:54:09,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:54:09,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:54:09,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:54:09,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:54:09,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:54:09,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-03 19:54:09,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 302 transitions, 3585 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:54:09,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:54:09,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-03 19:54:09,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:54:12,313 INFO L124 PetriNetUnfolderBase]: 11511/16360 cut-off events. [2024-06-03 19:54:12,314 INFO L125 PetriNetUnfolderBase]: For 746687/746712 co-relation queries the response was YES. [2024-06-03 19:54:12,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116915 conditions, 16360 events. 11511/16360 cut-off events. For 746687/746712 co-relation queries the response was YES. Maximal size of possible extension queue 563. Compared 94616 event pairs, 3578 based on Foata normal form. 100/16451 useless extension candidates. Maximal degree in co-relation 116843. Up to 14200 conditions per place. [2024-06-03 19:54:12,525 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 186 selfloop transitions, 164 changer transitions 0/357 dead transitions. [2024-06-03 19:54:12,526 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 357 transitions, 4614 flow [2024-06-03 19:54:12,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:54:12,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:54:12,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 213 transitions. [2024-06-03 19:54:12,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5120192307692307 [2024-06-03 19:54:12,527 INFO L175 Difference]: Start difference. First operand has 166 places, 302 transitions, 3585 flow. Second operand 8 states and 213 transitions. [2024-06-03 19:54:12,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 357 transitions, 4614 flow [2024-06-03 19:54:14,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 357 transitions, 4368 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-03 19:54:14,838 INFO L231 Difference]: Finished difference. Result has 169 places, 308 transitions, 3844 flow [2024-06-03 19:54:14,839 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3339, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3844, PETRI_PLACES=169, PETRI_TRANSITIONS=308} [2024-06-03 19:54:14,839 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 114 predicate places. [2024-06-03 19:54:14,839 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 308 transitions, 3844 flow [2024-06-03 19:54:14,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:54:14,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:54:14,840 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:54:14,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-03 19:54:14,840 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:54:14,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:54:14,840 INFO L85 PathProgramCache]: Analyzing trace with hash 353049847, now seen corresponding path program 1 times [2024-06-03 19:54:14,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:54:14,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14005175] [2024-06-03 19:54:14,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:54:14,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:54:14,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:54:15,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:54:15,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:54:15,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14005175] [2024-06-03 19:54:15,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14005175] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:54:15,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:54:15,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:54:15,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679995980] [2024-06-03 19:54:15,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:54:15,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:54:15,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:54:15,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:54:15,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:54:15,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-03 19:54:15,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 308 transitions, 3844 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:54:15,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:54:15,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-03 19:54:15,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:54:19,049 INFO L124 PetriNetUnfolderBase]: 11575/16449 cut-off events. [2024-06-03 19:54:19,050 INFO L125 PetriNetUnfolderBase]: For 699215/699220 co-relation queries the response was YES. [2024-06-03 19:54:19,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117581 conditions, 16449 events. 11575/16449 cut-off events. For 699215/699220 co-relation queries the response was YES. Maximal size of possible extension queue 568. Compared 95024 event pairs, 3769 based on Foata normal form. 8/16449 useless extension candidates. Maximal degree in co-relation 117508. Up to 15472 conditions per place. [2024-06-03 19:54:19,247 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 286 selfloop transitions, 61 changer transitions 0/354 dead transitions. [2024-06-03 19:54:19,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 354 transitions, 4752 flow [2024-06-03 19:54:19,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:54:19,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:54:19,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-03 19:54:19,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4951923076923077 [2024-06-03 19:54:19,249 INFO L175 Difference]: Start difference. First operand has 169 places, 308 transitions, 3844 flow. Second operand 8 states and 206 transitions. [2024-06-03 19:54:19,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 354 transitions, 4752 flow [2024-06-03 19:54:20,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 354 transitions, 4380 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-03 19:54:20,512 INFO L231 Difference]: Finished difference. Result has 171 places, 313 transitions, 3690 flow [2024-06-03 19:54:20,512 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3472, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3690, PETRI_PLACES=171, PETRI_TRANSITIONS=313} [2024-06-03 19:54:20,513 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 116 predicate places. [2024-06-03 19:54:20,513 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 313 transitions, 3690 flow [2024-06-03 19:54:20,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:54:20,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:54:20,513 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:54:20,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-03 19:54:20,514 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:54:20,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:54:20,514 INFO L85 PathProgramCache]: Analyzing trace with hash 353169817, now seen corresponding path program 2 times [2024-06-03 19:54:20,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:54:20,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224531085] [2024-06-03 19:54:20,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:54:20,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:54:20,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:54:21,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:54:21,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:54:21,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224531085] [2024-06-03 19:54:21,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224531085] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:54:21,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:54:21,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:54:21,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601505991] [2024-06-03 19:54:21,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:54:21,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:54:21,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:54:21,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:54:21,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:54:21,664 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-03 19:54:21,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 313 transitions, 3690 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:54:21,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:54:21,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-03 19:54:21,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:54:24,844 INFO L124 PetriNetUnfolderBase]: 11731/16670 cut-off events. [2024-06-03 19:54:24,845 INFO L125 PetriNetUnfolderBase]: For 731109/731117 co-relation queries the response was YES. [2024-06-03 19:54:24,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120488 conditions, 16670 events. 11731/16670 cut-off events. For 731109/731117 co-relation queries the response was YES. Maximal size of possible extension queue 580. Compared 96723 event pairs, 3604 based on Foata normal form. 8/16667 useless extension candidates. Maximal degree in co-relation 120414. Up to 14299 conditions per place. [2024-06-03 19:54:25,079 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 200 selfloop transitions, 167 changer transitions 0/374 dead transitions. [2024-06-03 19:54:25,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 374 transitions, 5126 flow [2024-06-03 19:54:25,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:54:25,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:54:25,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 216 transitions. [2024-06-03 19:54:25,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5192307692307693 [2024-06-03 19:54:25,081 INFO L175 Difference]: Start difference. First operand has 171 places, 313 transitions, 3690 flow. Second operand 8 states and 216 transitions. [2024-06-03 19:54:25,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 374 transitions, 5126 flow [2024-06-03 19:54:26,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 374 transitions, 4890 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-03 19:54:26,156 INFO L231 Difference]: Finished difference. Result has 173 places, 327 transitions, 4097 flow [2024-06-03 19:54:26,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3454, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4097, PETRI_PLACES=173, PETRI_TRANSITIONS=327} [2024-06-03 19:54:26,157 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 118 predicate places. [2024-06-03 19:54:26,157 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 327 transitions, 4097 flow [2024-06-03 19:54:26,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:54:26,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:54:26,157 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:54:26,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-03 19:54:26,158 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:54:26,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:54:26,158 INFO L85 PathProgramCache]: Analyzing trace with hash 530301337, now seen corresponding path program 3 times [2024-06-03 19:54:26,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:54:26,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923779254] [2024-06-03 19:54:26,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:54:26,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:54:26,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:54:27,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:54:27,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:54:27,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923779254] [2024-06-03 19:54:27,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923779254] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:54:27,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:54:27,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:54:27,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963336277] [2024-06-03 19:54:27,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:54:27,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:54:27,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:54:27,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:54:27,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:54:27,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-03 19:54:27,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 327 transitions, 4097 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:54:27,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:54:27,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-03 19:54:27,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:54:30,214 INFO L124 PetriNetUnfolderBase]: 11887/16918 cut-off events. [2024-06-03 19:54:30,215 INFO L125 PetriNetUnfolderBase]: For 794581/794589 co-relation queries the response was YES. [2024-06-03 19:54:30,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127229 conditions, 16918 events. 11887/16918 cut-off events. For 794581/794589 co-relation queries the response was YES. Maximal size of possible extension queue 593. Compared 98442 event pairs, 3607 based on Foata normal form. 8/16915 useless extension candidates. Maximal degree in co-relation 127153. Up to 14415 conditions per place. [2024-06-03 19:54:30,411 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 206 selfloop transitions, 167 changer transitions 0/380 dead transitions. [2024-06-03 19:54:30,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 380 transitions, 5498 flow [2024-06-03 19:54:30,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:54:30,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:54:30,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 212 transitions. [2024-06-03 19:54:30,420 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5096153846153846 [2024-06-03 19:54:30,420 INFO L175 Difference]: Start difference. First operand has 173 places, 327 transitions, 4097 flow. Second operand 8 states and 212 transitions. [2024-06-03 19:54:30,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 380 transitions, 5498 flow [2024-06-03 19:54:32,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 380 transitions, 5320 flow, removed 64 selfloop flow, removed 3 redundant places. [2024-06-03 19:54:32,015 INFO L231 Difference]: Finished difference. Result has 178 places, 336 transitions, 4445 flow [2024-06-03 19:54:32,016 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3945, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4445, PETRI_PLACES=178, PETRI_TRANSITIONS=336} [2024-06-03 19:54:32,016 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 123 predicate places. [2024-06-03 19:54:32,016 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 336 transitions, 4445 flow [2024-06-03 19:54:32,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:54:32,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:54:32,017 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:54:32,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-03 19:54:32,017 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:54:32,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:54:32,018 INFO L85 PathProgramCache]: Analyzing trace with hash 1468780243, now seen corresponding path program 4 times [2024-06-03 19:54:32,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:54:32,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60081637] [2024-06-03 19:54:32,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:54:32,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:54:32,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:54:33,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:54:33,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:54:33,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60081637] [2024-06-03 19:54:33,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60081637] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:54:33,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:54:33,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:54:33,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942033052] [2024-06-03 19:54:33,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:54:33,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:54:33,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:54:33,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:54:33,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:54:33,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-03 19:54:33,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 336 transitions, 4445 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:54:33,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:54:33,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-03 19:54:33,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:54:36,379 INFO L124 PetriNetUnfolderBase]: 12249/17433 cut-off events. [2024-06-03 19:54:36,379 INFO L125 PetriNetUnfolderBase]: For 883931/883942 co-relation queries the response was YES. [2024-06-03 19:54:36,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132561 conditions, 17433 events. 12249/17433 cut-off events. For 883931/883942 co-relation queries the response was YES. Maximal size of possible extension queue 626. Compared 101941 event pairs, 3619 based on Foata normal form. 84/17508 useless extension candidates. Maximal degree in co-relation 132483. Up to 15206 conditions per place. [2024-06-03 19:54:36,568 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 230 selfloop transitions, 147 changer transitions 0/384 dead transitions. [2024-06-03 19:54:36,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 384 transitions, 5520 flow [2024-06-03 19:54:36,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:54:36,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:54:36,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-03 19:54:36,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49759615384615385 [2024-06-03 19:54:36,570 INFO L175 Difference]: Start difference. First operand has 178 places, 336 transitions, 4445 flow. Second operand 8 states and 207 transitions. [2024-06-03 19:54:36,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 384 transitions, 5520 flow [2024-06-03 19:54:37,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 384 transitions, 5267 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-06-03 19:54:37,901 INFO L231 Difference]: Finished difference. Result has 182 places, 342 transitions, 4675 flow [2024-06-03 19:54:37,901 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4192, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4675, PETRI_PLACES=182, PETRI_TRANSITIONS=342} [2024-06-03 19:54:37,902 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 127 predicate places. [2024-06-03 19:54:37,902 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 342 transitions, 4675 flow [2024-06-03 19:54:37,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:54:37,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:54:37,902 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:54:37,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-03 19:54:37,903 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:54:37,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:54:37,903 INFO L85 PathProgramCache]: Analyzing trace with hash 1025499663, now seen corresponding path program 1 times [2024-06-03 19:54:37,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:54:37,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585942226] [2024-06-03 19:54:37,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:54:37,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:54:37,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:54:39,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:54:39,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:54:39,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585942226] [2024-06-03 19:54:39,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585942226] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:54:39,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:54:39,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:54:39,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191210295] [2024-06-03 19:54:39,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:54:39,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:54:39,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:54:39,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:54:39,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:54:39,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-03 19:54:39,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 342 transitions, 4675 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:54:39,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:54:39,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-03 19:54:39,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:54:42,805 INFO L124 PetriNetUnfolderBase]: 12276/17454 cut-off events. [2024-06-03 19:54:42,805 INFO L125 PetriNetUnfolderBase]: For 874073/874086 co-relation queries the response was YES. [2024-06-03 19:54:42,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134299 conditions, 17454 events. 12276/17454 cut-off events. For 874073/874086 co-relation queries the response was YES. Maximal size of possible extension queue 625. Compared 101951 event pairs, 3784 based on Foata normal form. 14/17462 useless extension candidates. Maximal degree in co-relation 134220. Up to 16703 conditions per place. [2024-06-03 19:54:43,056 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 341 selfloop transitions, 41 changer transitions 0/389 dead transitions. [2024-06-03 19:54:43,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 389 transitions, 5728 flow [2024-06-03 19:54:43,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:54:43,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:54:43,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-03 19:54:43,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46875 [2024-06-03 19:54:43,058 INFO L175 Difference]: Start difference. First operand has 182 places, 342 transitions, 4675 flow. Second operand 8 states and 195 transitions. [2024-06-03 19:54:43,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 389 transitions, 5728 flow [2024-06-03 19:54:44,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 389 transitions, 5437 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-03 19:54:44,813 INFO L231 Difference]: Finished difference. Result has 186 places, 351 transitions, 4647 flow [2024-06-03 19:54:44,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4392, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4647, PETRI_PLACES=186, PETRI_TRANSITIONS=351} [2024-06-03 19:54:44,814 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 131 predicate places. [2024-06-03 19:54:44,814 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 351 transitions, 4647 flow [2024-06-03 19:54:44,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:54:44,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:54:44,815 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:54:44,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-03 19:54:44,815 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:54:44,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:54:44,815 INFO L85 PathProgramCache]: Analyzing trace with hash 1396014654, now seen corresponding path program 1 times [2024-06-03 19:54:44,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:54:44,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760191554] [2024-06-03 19:54:44,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:54:44,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:54:44,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:54:45,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:54:45,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:54:45,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760191554] [2024-06-03 19:54:45,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760191554] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:54:45,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:54:45,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:54:45,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364836207] [2024-06-03 19:54:45,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:54:45,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:54:45,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:54:45,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:54:45,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:54:45,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-03 19:54:45,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 351 transitions, 4647 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:54:45,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:54:45,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-03 19:54:45,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:54:48,788 INFO L124 PetriNetUnfolderBase]: 11539/16702 cut-off events. [2024-06-03 19:54:48,788 INFO L125 PetriNetUnfolderBase]: For 886597/886807 co-relation queries the response was YES. [2024-06-03 19:54:48,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130193 conditions, 16702 events. 11539/16702 cut-off events. For 886597/886807 co-relation queries the response was YES. Maximal size of possible extension queue 642. Compared 101658 event pairs, 3664 based on Foata normal form. 11/16527 useless extension candidates. Maximal degree in co-relation 130112. Up to 15499 conditions per place. [2024-06-03 19:54:49,006 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 315 selfloop transitions, 16 changer transitions 0/378 dead transitions. [2024-06-03 19:54:49,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 378 transitions, 5457 flow [2024-06-03 19:54:49,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:54:49,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:54:49,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-03 19:54:49,008 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4807692307692308 [2024-06-03 19:54:49,008 INFO L175 Difference]: Start difference. First operand has 186 places, 351 transitions, 4647 flow. Second operand 6 states and 150 transitions. [2024-06-03 19:54:49,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 378 transitions, 5457 flow [2024-06-03 19:54:50,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 378 transitions, 5306 flow, removed 38 selfloop flow, removed 5 redundant places. [2024-06-03 19:54:50,902 INFO L231 Difference]: Finished difference. Result has 187 places, 355 transitions, 4612 flow [2024-06-03 19:54:50,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4496, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4612, PETRI_PLACES=187, PETRI_TRANSITIONS=355} [2024-06-03 19:54:50,902 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 132 predicate places. [2024-06-03 19:54:50,903 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 355 transitions, 4612 flow [2024-06-03 19:54:50,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:54:50,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:54:50,903 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:54:50,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-03 19:54:50,903 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:54:50,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:54:50,903 INFO L85 PathProgramCache]: Analyzing trace with hash -1714935589, now seen corresponding path program 4 times [2024-06-03 19:54:50,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:54:50,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65073361] [2024-06-03 19:54:50,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:54:50,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:54:50,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:54:51,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:54:51,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:54:51,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65073361] [2024-06-03 19:54:51,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65073361] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:54:51,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:54:51,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:54:51,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227435836] [2024-06-03 19:54:51,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:54:51,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:54:51,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:54:51,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:54:51,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:54:51,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-03 19:54:51,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 355 transitions, 4612 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:54:51,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:54:51,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-03 19:54:51,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:54:55,443 INFO L124 PetriNetUnfolderBase]: 12315/17527 cut-off events. [2024-06-03 19:54:55,443 INFO L125 PetriNetUnfolderBase]: For 928722/928727 co-relation queries the response was YES. [2024-06-03 19:54:55,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137049 conditions, 17527 events. 12315/17527 cut-off events. For 928722/928727 co-relation queries the response was YES. Maximal size of possible extension queue 631. Compared 102671 event pairs, 3903 based on Foata normal form. 4/17501 useless extension candidates. Maximal degree in co-relation 136967. Up to 16488 conditions per place. [2024-06-03 19:54:55,655 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 329 selfloop transitions, 64 changer transitions 0/400 dead transitions. [2024-06-03 19:54:55,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 400 transitions, 5623 flow [2024-06-03 19:54:55,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:54:55,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:54:55,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-03 19:54:55,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4879807692307692 [2024-06-03 19:54:55,656 INFO L175 Difference]: Start difference. First operand has 187 places, 355 transitions, 4612 flow. Second operand 8 states and 203 transitions. [2024-06-03 19:54:55,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 400 transitions, 5623 flow [2024-06-03 19:54:57,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 400 transitions, 5537 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-03 19:54:57,466 INFO L231 Difference]: Finished difference. Result has 191 places, 359 transitions, 4750 flow [2024-06-03 19:54:57,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4526, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4750, PETRI_PLACES=191, PETRI_TRANSITIONS=359} [2024-06-03 19:54:57,466 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 136 predicate places. [2024-06-03 19:54:57,467 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 359 transitions, 4750 flow [2024-06-03 19:54:57,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:54:57,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:54:57,467 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:54:57,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-03 19:54:57,467 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:54:57,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:54:57,468 INFO L85 PathProgramCache]: Analyzing trace with hash 518808951, now seen corresponding path program 5 times [2024-06-03 19:54:57,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:54:57,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394298028] [2024-06-03 19:54:57,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:54:57,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:54:57,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:54:58,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:54:58,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:54:58,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394298028] [2024-06-03 19:54:58,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394298028] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:54:58,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:54:58,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:54:58,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255104172] [2024-06-03 19:54:58,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:54:58,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:54:58,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:54:58,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:54:58,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:54:58,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-03 19:54:58,634 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 359 transitions, 4750 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:54:58,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:54:58,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-03 19:54:58,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand