./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 cde23df1 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-cde23df-m [2024-06-14 12:35:13,058 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-14 12:35:13,118 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-14 12:35:13,124 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-14 12:35:13,124 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-14 12:35:13,153 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-14 12:35:13,153 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-14 12:35:13,154 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-14 12:35:13,154 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-14 12:35:13,157 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-14 12:35:13,158 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-14 12:35:13,158 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-14 12:35:13,159 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-14 12:35:13,160 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-14 12:35:13,160 INFO L153 SettingsManager]: * Use SBE=true [2024-06-14 12:35:13,160 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-14 12:35:13,160 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-14 12:35:13,161 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-14 12:35:13,161 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-14 12:35:13,161 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-14 12:35:13,161 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-14 12:35:13,162 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-14 12:35:13,162 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-14 12:35:13,162 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-14 12:35:13,162 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-14 12:35:13,162 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-14 12:35:13,163 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-14 12:35:13,163 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-14 12:35:13,163 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-14 12:35:13,163 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-14 12:35:13,164 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-14 12:35:13,164 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-14 12:35:13,165 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 12:35:13,165 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-14 12:35:13,165 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-14 12:35:13,165 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-14 12:35:13,165 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-14 12:35:13,166 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-14 12:35:13,166 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-14 12:35:13,166 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-14 12:35:13,166 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-14 12:35:13,166 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-14 12:35:13,167 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-14 12:35:13,167 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-14 12:35:13,359 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-14 12:35:13,374 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-14 12:35:13,376 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-14 12:35:13,377 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-14 12:35:13,377 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-14 12:35:13,378 INFO L431 ainManager$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 [2024-06-14 12:35:13,563 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-14 12:35:13,565 INFO L274 PluginConnector]: CDTParser initialized [2024-06-14 12:35:13,566 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix051_pso.opt_rmo.opt_tso.opt.i [2024-06-14 12:35:14,492 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-14 12:35:14,739 INFO L384 CDTParser]: Found 1 translation units. [2024-06-14 12:35:14,740 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix051_pso.opt_rmo.opt_tso.opt.i [2024-06-14 12:35:14,752 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/02d17391b/2403ab6e1e8946eda3a1b0dbba85bc24/FLAG3df850ea3 [2024-06-14 12:35:14,764 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/02d17391b/2403ab6e1e8946eda3a1b0dbba85bc24 [2024-06-14 12:35:14,764 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-14 12:35:14,765 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-14 12:35:14,766 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-14 12:35:14,767 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-14 12:35:14,770 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-14 12:35:14,771 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:35:13" (1/2) ... [2024-06-14 12:35:14,772 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12411fa2 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:35:14, skipping insertion in model container [2024-06-14 12:35:14,772 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:35:13" (1/2) ... [2024-06-14 12:35:14,773 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@36e1da79 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:35:14, skipping insertion in model container [2024-06-14 12:35:14,773 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 12:35:14" (2/2) ... [2024-06-14 12:35:14,774 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12411fa2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:35:14, skipping insertion in model container [2024-06-14 12:35:14,774 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 12:35:14" (2/2) ... [2024-06-14 12:35:14,774 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-14 12:35:14,873 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-14 12:35:14,874 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$r_buff1_thd0 == (_Bool)0) [2024-06-14 12:35:14,874 INFO L97 edCorrectnessWitness]: Location invariant before [L853-L853] (((((((((((((((((((((! multithreaded || z$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) [2024-06-14 12:35:14,875 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$r_buff1_thd0 == (_Bool)0) [2024-06-14 12:35:14,875 INFO L97 edCorrectnessWitness]: Location invariant before [L854-L854] (((((((((((((((((((((! multithreaded || z$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) [2024-06-14 12:35:14,875 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-14 12:35:14,875 INFO L106 edCorrectnessWitness]: ghost_update [L847-L847] multithreaded = 1; [2024-06-14 12:35:14,932 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-14 12:35:15,237 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 12:35:15,247 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-14 12:35:15,371 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 12:35:15,410 INFO L206 MainTranslator]: Completed translation [2024-06-14 12:35:15,411 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:35:15 WrapperNode [2024-06-14 12:35:15,411 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-14 12:35:15,412 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-14 12:35:15,412 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-14 12:35:15,412 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-14 12:35:15,417 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:35:15" (1/1) ... [2024-06-14 12:35:15,429 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:35:15" (1/1) ... [2024-06-14 12:35:15,457 INFO L138 Inliner]: procedures = 176, calls = 52, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 138 [2024-06-14 12:35:15,458 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-14 12:35:15,459 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-14 12:35:15,459 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-14 12:35:15,459 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-14 12:35:15,467 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:35:15" (1/1) ... [2024-06-14 12:35:15,467 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:35:15" (1/1) ... [2024-06-14 12:35:15,473 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:35:15" (1/1) ... [2024-06-14 12:35:15,486 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]. [2024-06-14 12:35:15,486 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:35:15" (1/1) ... [2024-06-14 12:35:15,486 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:35:15" (1/1) ... [2024-06-14 12:35:15,494 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:35:15" (1/1) ... [2024-06-14 12:35:15,496 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:35:15" (1/1) ... [2024-06-14 12:35:15,497 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:35:15" (1/1) ... [2024-06-14 12:35:15,499 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:35:15" (1/1) ... [2024-06-14 12:35:15,501 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-14 12:35:15,502 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-14 12:35:15,502 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-14 12:35:15,502 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-14 12:35:15,504 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:35:15" (1/1) ... [2024-06-14 12:35:15,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 12:35:15,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 12:35:15,563 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) [2024-06-14 12:35:15,572 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 [2024-06-14 12:35:15,592 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-14 12:35:15,596 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-14 12:35:15,596 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-14 12:35:15,597 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-14 12:35:15,597 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-14 12:35:15,597 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-14 12:35:15,597 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-14 12:35:15,597 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-14 12:35:15,597 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-14 12:35:15,597 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-14 12:35:15,597 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-14 12:35:15,597 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-14 12:35:15,597 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-14 12:35:15,597 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-14 12:35:15,598 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-14 12:35:15,733 INFO L244 CfgBuilder]: Building ICFG [2024-06-14 12:35:15,735 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-14 12:35:16,106 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-14 12:35:16,106 INFO L293 CfgBuilder]: Performing block encoding [2024-06-14 12:35:16,206 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-14 12:35:16,207 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-14 12:35:16,207 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 12:35:16 BoogieIcfgContainer [2024-06-14 12:35:16,207 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-14 12:35:16,208 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-14 12:35:16,209 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-14 12:35:16,211 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-14 12:35:16,211 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:35:13" (1/4) ... [2024-06-14 12:35:16,211 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4923cc10 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 12:35:16, skipping insertion in model container [2024-06-14 12:35:16,212 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.06 12:35:14" (2/4) ... [2024-06-14 12:35:16,212 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4923cc10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 12:35:16, skipping insertion in model container [2024-06-14 12:35:16,212 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:35:15" (3/4) ... [2024-06-14 12:35:16,212 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4923cc10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 12:35:16, skipping insertion in model container [2024-06-14 12:35:16,212 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 12:35:16" (4/4) ... [2024-06-14 12:35:16,213 INFO L112 eAbstractionObserver]: Analyzing ICFG mix051_pso.opt_rmo.opt_tso.opt.i [2024-06-14 12:35:16,226 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-14 12:35:16,227 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-14 12:35:16,227 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-14 12:35:16,270 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-14 12:35:16,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 65 places, 52 transitions, 120 flow [2024-06-14 12:35:16,324 INFO L124 PetriNetUnfolderBase]: 0/48 cut-off events. [2024-06-14 12:35:16,325 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 12:35:16,326 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. [2024-06-14 12:35:16,326 INFO L82 GeneralOperation]: Start removeDead. Operand has 65 places, 52 transitions, 120 flow [2024-06-14 12:35:16,328 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 55 places, 42 transitions, 96 flow [2024-06-14 12:35:16,335 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-14 12:35:16,339 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;@4c3ef95d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-14 12:35:16,339 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-14 12:35:16,342 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-14 12:35:16,342 INFO L124 PetriNetUnfolderBase]: 0/7 cut-off events. [2024-06-14 12:35:16,343 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 12:35:16,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:35:16,343 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-14 12:35:16,343 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)] === [2024-06-14 12:35:16,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:35:16,347 INFO L85 PathProgramCache]: Analyzing trace with hash -1341969668, now seen corresponding path program 1 times [2024-06-14 12:35:16,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:35:16,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122462945] [2024-06-14 12:35:16,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:35:16,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:35:16,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:35:17,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:35:17,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:35:17,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122462945] [2024-06-14 12:35:17,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122462945] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:35:17,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:35:17,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-14 12:35:17,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317766905] [2024-06-14 12:35:17,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:35:17,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-14 12:35:17,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:35:17,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-14 12:35:17,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-14 12:35:17,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-14 12:35:17,581 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) [2024-06-14 12:35:17,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:35:17,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-14 12:35:17,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:35:18,462 INFO L124 PetriNetUnfolderBase]: 5296/7609 cut-off events. [2024-06-14 12:35:18,462 INFO L125 PetriNetUnfolderBase]: For 122/122 co-relation queries the response was YES. [2024-06-14 12:35:18,473 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. [2024-06-14 12:35:18,502 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 42 selfloop transitions, 5 changer transitions 0/56 dead transitions. [2024-06-14 12:35:18,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 56 transitions, 227 flow [2024-06-14 12:35:18,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-14 12:35:18,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-14 12:35:18,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 99 transitions. [2024-06-14 12:35:18,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6346153846153846 [2024-06-14 12:35:18,513 INFO L175 Difference]: Start difference. First operand has 55 places, 42 transitions, 96 flow. Second operand 3 states and 99 transitions. [2024-06-14 12:35:18,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 56 transitions, 227 flow [2024-06-14 12:35:18,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 56 transitions, 220 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-14 12:35:18,517 INFO L231 Difference]: Finished difference. Result has 54 places, 46 transitions, 131 flow [2024-06-14 12:35:18,519 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} [2024-06-14 12:35:18,521 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -1 predicate places. [2024-06-14 12:35:18,521 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 46 transitions, 131 flow [2024-06-14 12:35:18,522 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) [2024-06-14 12:35:18,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:35:18,522 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:35:18,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-14 12:35:18,522 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)] === [2024-06-14 12:35:18,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:35:18,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1142642021, now seen corresponding path program 1 times [2024-06-14 12:35:18,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:35:18,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466879646] [2024-06-14 12:35:18,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:35:18,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:35:18,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:35:19,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:35:19,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:35:19,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466879646] [2024-06-14 12:35:19,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466879646] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:35:19,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:35:19,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 12:35:19,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232936851] [2024-06-14 12:35:19,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:35:19,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 12:35:19,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:35:19,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 12:35:19,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-14 12:35:19,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 52 [2024-06-14 12:35:19,240 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) [2024-06-14 12:35:19,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:35:19,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 52 [2024-06-14 12:35:19,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:35:20,077 INFO L124 PetriNetUnfolderBase]: 6191/8656 cut-off events. [2024-06-14 12:35:20,077 INFO L125 PetriNetUnfolderBase]: For 1762/1762 co-relation queries the response was YES. [2024-06-14 12:35:20,088 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. [2024-06-14 12:35:20,118 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 53 selfloop transitions, 9 changer transitions 0/70 dead transitions. [2024-06-14 12:35:20,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 70 transitions, 321 flow [2024-06-14 12:35:20,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 12:35:20,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 12:35:20,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 126 transitions. [2024-06-14 12:35:20,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6057692307692307 [2024-06-14 12:35:20,121 INFO L175 Difference]: Start difference. First operand has 54 places, 46 transitions, 131 flow. Second operand 4 states and 126 transitions. [2024-06-14 12:35:20,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 70 transitions, 321 flow [2024-06-14 12:35:20,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 70 transitions, 316 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-14 12:35:20,123 INFO L231 Difference]: Finished difference. Result has 57 places, 50 transitions, 179 flow [2024-06-14 12:35:20,123 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} [2024-06-14 12:35:20,123 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 2 predicate places. [2024-06-14 12:35:20,124 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 50 transitions, 179 flow [2024-06-14 12:35:20,124 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) [2024-06-14 12:35:20,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:35:20,124 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:35:20,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-14 12:35:20,124 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)] === [2024-06-14 12:35:20,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:35:20,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1062163593, now seen corresponding path program 1 times [2024-06-14 12:35:20,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:35:20,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166027658] [2024-06-14 12:35:20,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:35:20,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:35:20,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:35:20,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:35:20,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:35:20,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166027658] [2024-06-14 12:35:20,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166027658] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:35:20,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:35:20,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 12:35:20,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448295981] [2024-06-14 12:35:20,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:35:20,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 12:35:20,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:35:20,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 12:35:20,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 12:35:20,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 52 [2024-06-14 12:35:20,868 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) [2024-06-14 12:35:20,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:35:20,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 52 [2024-06-14 12:35:20,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:35:21,766 INFO L124 PetriNetUnfolderBase]: 6209/8723 cut-off events. [2024-06-14 12:35:21,767 INFO L125 PetriNetUnfolderBase]: For 5064/5064 co-relation queries the response was YES. [2024-06-14 12:35:21,776 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. [2024-06-14 12:35:21,804 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 71 selfloop transitions, 21 changer transitions 0/100 dead transitions. [2024-06-14 12:35:21,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 100 transitions, 537 flow [2024-06-14 12:35:21,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:35:21,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:35:21,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 165 transitions. [2024-06-14 12:35:21,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6346153846153846 [2024-06-14 12:35:21,806 INFO L175 Difference]: Start difference. First operand has 57 places, 50 transitions, 179 flow. Second operand 5 states and 165 transitions. [2024-06-14 12:35:21,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 100 transitions, 537 flow [2024-06-14 12:35:21,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 100 transitions, 518 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-14 12:35:21,809 INFO L231 Difference]: Finished difference. Result has 62 places, 64 transitions, 310 flow [2024-06-14 12:35:21,809 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} [2024-06-14 12:35:21,810 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 7 predicate places. [2024-06-14 12:35:21,810 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 64 transitions, 310 flow [2024-06-14 12:35:21,810 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) [2024-06-14 12:35:21,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:35:21,811 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:35:21,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-14 12:35:21,811 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)] === [2024-06-14 12:35:21,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:35:21,811 INFO L85 PathProgramCache]: Analyzing trace with hash 1463026678, now seen corresponding path program 1 times [2024-06-14 12:35:21,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:35:21,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640177926] [2024-06-14 12:35:21,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:35:21,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:35:21,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:35:22,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:35:22,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:35:22,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640177926] [2024-06-14 12:35:22,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640177926] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:35:22,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:35:22,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 12:35:22,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999541560] [2024-06-14 12:35:22,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:35:22,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:35:22,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:35:22,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:35:22,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:35:22,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 52 [2024-06-14 12:35:22,593 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) [2024-06-14 12:35:22,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:35:22,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 52 [2024-06-14 12:35:22,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:35:23,589 INFO L124 PetriNetUnfolderBase]: 6351/8943 cut-off events. [2024-06-14 12:35:23,589 INFO L125 PetriNetUnfolderBase]: For 12467/12486 co-relation queries the response was YES. [2024-06-14 12:35:23,603 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. [2024-06-14 12:35:23,634 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 81 selfloop transitions, 24 changer transitions 0/113 dead transitions. [2024-06-14 12:35:23,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 113 transitions, 692 flow [2024-06-14 12:35:23,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:35:23,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:35:23,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 193 transitions. [2024-06-14 12:35:23,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6185897435897436 [2024-06-14 12:35:23,636 INFO L175 Difference]: Start difference. First operand has 62 places, 64 transitions, 310 flow. Second operand 6 states and 193 transitions. [2024-06-14 12:35:23,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 113 transitions, 692 flow [2024-06-14 12:35:23,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 113 transitions, 680 flow, removed 6 selfloop flow, removed 0 redundant places. [2024-06-14 12:35:23,643 INFO L231 Difference]: Finished difference. Result has 67 places, 66 transitions, 379 flow [2024-06-14 12:35:23,643 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} [2024-06-14 12:35:23,644 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 12 predicate places. [2024-06-14 12:35:23,644 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 66 transitions, 379 flow [2024-06-14 12:35:23,644 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) [2024-06-14 12:35:23,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:35:23,644 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:35:23,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-14 12:35:23,645 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)] === [2024-06-14 12:35:23,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:35:23,645 INFO L85 PathProgramCache]: Analyzing trace with hash 1288603533, now seen corresponding path program 1 times [2024-06-14 12:35:23,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:35:23,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646111404] [2024-06-14 12:35:23,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:35:23,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:35:23,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:35:24,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:35:24,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:35:24,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646111404] [2024-06-14 12:35:24,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646111404] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:35:24,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:35:24,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 12:35:24,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037227446] [2024-06-14 12:35:24,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:35:24,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:35:24,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:35:24,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:35:24,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:35:24,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 52 [2024-06-14 12:35:24,334 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) [2024-06-14 12:35:24,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:35:24,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 52 [2024-06-14 12:35:24,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:35:25,175 INFO L124 PetriNetUnfolderBase]: 5437/7898 cut-off events. [2024-06-14 12:35:25,175 INFO L125 PetriNetUnfolderBase]: For 15542/15564 co-relation queries the response was YES. [2024-06-14 12:35:25,189 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. [2024-06-14 12:35:25,216 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 64 selfloop transitions, 10 changer transitions 0/83 dead transitions. [2024-06-14 12:35:25,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 83 transitions, 571 flow [2024-06-14 12:35:25,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:35:25,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:35:25,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 135 transitions. [2024-06-14 12:35:25,217 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5192307692307693 [2024-06-14 12:35:25,217 INFO L175 Difference]: Start difference. First operand has 67 places, 66 transitions, 379 flow. Second operand 5 states and 135 transitions. [2024-06-14 12:35:25,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 83 transitions, 571 flow [2024-06-14 12:35:25,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 83 transitions, 510 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-14 12:35:25,224 INFO L231 Difference]: Finished difference. Result has 68 places, 66 transitions, 349 flow [2024-06-14 12:35:25,225 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} [2024-06-14 12:35:25,229 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 13 predicate places. [2024-06-14 12:35:25,230 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 66 transitions, 349 flow [2024-06-14 12:35:25,230 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) [2024-06-14 12:35:25,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:35:25,230 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:35:25,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-14 12:35:25,230 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)] === [2024-06-14 12:35:25,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:35:25,231 INFO L85 PathProgramCache]: Analyzing trace with hash 733072842, now seen corresponding path program 1 times [2024-06-14 12:35:25,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:35:25,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063580527] [2024-06-14 12:35:25,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:35:25,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:35:25,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:35:25,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:35:25,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:35:25,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063580527] [2024-06-14 12:35:25,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063580527] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:35:25,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:35:25,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:35:25,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557166249] [2024-06-14 12:35:25,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:35:25,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:35:25,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:35:25,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:35:25,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:35:26,048 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-14 12:35:26,048 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) [2024-06-14 12:35:26,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:35:26,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-14 12:35:26,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:35:27,361 INFO L124 PetriNetUnfolderBase]: 6355/8945 cut-off events. [2024-06-14 12:35:27,361 INFO L125 PetriNetUnfolderBase]: For 21030/21050 co-relation queries the response was YES. [2024-06-14 12:35:27,384 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. [2024-06-14 12:35:27,421 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 67 selfloop transitions, 25 changer transitions 0/100 dead transitions. [2024-06-14 12:35:27,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 100 transitions, 670 flow [2024-06-14 12:35:27,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:35:27,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:35:27,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 166 transitions. [2024-06-14 12:35:27,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.532051282051282 [2024-06-14 12:35:27,423 INFO L175 Difference]: Start difference. First operand has 68 places, 66 transitions, 349 flow. Second operand 6 states and 166 transitions. [2024-06-14 12:35:27,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 100 transitions, 670 flow [2024-06-14 12:35:27,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 100 transitions, 641 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-14 12:35:27,445 INFO L231 Difference]: Finished difference. Result has 70 places, 70 transitions, 416 flow [2024-06-14 12:35:27,445 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} [2024-06-14 12:35:27,446 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 15 predicate places. [2024-06-14 12:35:27,446 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 70 transitions, 416 flow [2024-06-14 12:35:27,446 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) [2024-06-14 12:35:27,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:35:27,447 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:35:27,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-14 12:35:27,447 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)] === [2024-06-14 12:35:27,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:35:27,447 INFO L85 PathProgramCache]: Analyzing trace with hash 1397465772, now seen corresponding path program 2 times [2024-06-14 12:35:27,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:35:27,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809937827] [2024-06-14 12:35:27,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:35:27,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:35:27,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:35:28,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:35:28,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:35:28,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809937827] [2024-06-14 12:35:28,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809937827] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:35:28,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:35:28,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:35:28,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532467326] [2024-06-14 12:35:28,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:35:28,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:35:28,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:35:28,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:35:28,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:35:28,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-14 12:35:28,230 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) [2024-06-14 12:35:28,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:35:28,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-14 12:35:28,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:35:29,347 INFO L124 PetriNetUnfolderBase]: 6310/8872 cut-off events. [2024-06-14 12:35:29,347 INFO L125 PetriNetUnfolderBase]: For 25012/25040 co-relation queries the response was YES. [2024-06-14 12:35:29,378 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. [2024-06-14 12:35:29,416 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 60 selfloop transitions, 26 changer transitions 0/94 dead transitions. [2024-06-14 12:35:29,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 94 transitions, 650 flow [2024-06-14 12:35:29,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:35:29,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:35:29,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 161 transitions. [2024-06-14 12:35:29,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5160256410256411 [2024-06-14 12:35:29,417 INFO L175 Difference]: Start difference. First operand has 70 places, 70 transitions, 416 flow. Second operand 6 states and 161 transitions. [2024-06-14 12:35:29,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 94 transitions, 650 flow [2024-06-14 12:35:29,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 94 transitions, 607 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-14 12:35:29,429 INFO L231 Difference]: Finished difference. Result has 73 places, 70 transitions, 436 flow [2024-06-14 12:35:29,429 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} [2024-06-14 12:35:29,430 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 18 predicate places. [2024-06-14 12:35:29,430 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 70 transitions, 436 flow [2024-06-14 12:35:29,430 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) [2024-06-14 12:35:29,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:35:29,430 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:35:29,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-14 12:35:29,431 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)] === [2024-06-14 12:35:29,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:35:29,431 INFO L85 PathProgramCache]: Analyzing trace with hash 1427801086, now seen corresponding path program 1 times [2024-06-14 12:35:29,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:35:29,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040279730] [2024-06-14 12:35:29,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:35:29,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:35:29,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:35:30,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:35:30,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:35:30,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040279730] [2024-06-14 12:35:30,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040279730] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:35:30,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:35:30,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:35:30,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984527096] [2024-06-14 12:35:30,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:35:30,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:35:30,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:35:30,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:35:30,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:35:30,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-14 12:35:30,511 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) [2024-06-14 12:35:30,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:35:30,512 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-14 12:35:30,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:35:31,709 INFO L124 PetriNetUnfolderBase]: 6889/9839 cut-off events. [2024-06-14 12:35:31,710 INFO L125 PetriNetUnfolderBase]: For 30543/30543 co-relation queries the response was YES. [2024-06-14 12:35:31,727 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. [2024-06-14 12:35:31,759 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 84 selfloop transitions, 17 changer transitions 0/109 dead transitions. [2024-06-14 12:35:31,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 109 transitions, 775 flow [2024-06-14 12:35:31,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:35:31,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:35:31,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-14 12:35:31,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49725274725274726 [2024-06-14 12:35:31,761 INFO L175 Difference]: Start difference. First operand has 73 places, 70 transitions, 436 flow. Second operand 7 states and 181 transitions. [2024-06-14 12:35:31,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 109 transitions, 775 flow [2024-06-14 12:35:31,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 109 transitions, 684 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-14 12:35:31,776 INFO L231 Difference]: Finished difference. Result has 75 places, 77 transitions, 457 flow [2024-06-14 12:35:31,776 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} [2024-06-14 12:35:31,777 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 20 predicate places. [2024-06-14 12:35:31,777 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 77 transitions, 457 flow [2024-06-14 12:35:31,777 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) [2024-06-14 12:35:31,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:35:31,777 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:35:31,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-14 12:35:31,778 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)] === [2024-06-14 12:35:31,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:35:31,778 INFO L85 PathProgramCache]: Analyzing trace with hash 128141917, now seen corresponding path program 1 times [2024-06-14 12:35:31,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:35:31,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391294566] [2024-06-14 12:35:31,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:35:31,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:35:31,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:35:32,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:35:32,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:35:32,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391294566] [2024-06-14 12:35:32,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391294566] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:35:32,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:35:32,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 12:35:32,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385753681] [2024-06-14 12:35:32,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:35:32,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:35:32,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:35:32,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:35:32,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:35:32,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-14 12:35:32,539 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) [2024-06-14 12:35:32,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:35:32,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-14 12:35:32,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:35:33,541 INFO L124 PetriNetUnfolderBase]: 6875/10005 cut-off events. [2024-06-14 12:35:33,542 INFO L125 PetriNetUnfolderBase]: For 37806/37806 co-relation queries the response was YES. [2024-06-14 12:35:33,562 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. [2024-06-14 12:35:33,595 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 78 selfloop transitions, 10 changer transitions 0/96 dead transitions. [2024-06-14 12:35:33,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 96 transitions, 703 flow [2024-06-14 12:35:33,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:35:33,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:35:33,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 128 transitions. [2024-06-14 12:35:33,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49230769230769234 [2024-06-14 12:35:33,597 INFO L175 Difference]: Start difference. First operand has 75 places, 77 transitions, 457 flow. Second operand 5 states and 128 transitions. [2024-06-14 12:35:33,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 96 transitions, 703 flow [2024-06-14 12:35:33,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 96 transitions, 655 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-14 12:35:33,617 INFO L231 Difference]: Finished difference. Result has 76 places, 81 transitions, 478 flow [2024-06-14 12:35:33,617 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} [2024-06-14 12:35:33,618 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 21 predicate places. [2024-06-14 12:35:33,618 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 81 transitions, 478 flow [2024-06-14 12:35:33,618 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) [2024-06-14 12:35:33,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:35:33,618 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:35:33,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-14 12:35:33,619 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)] === [2024-06-14 12:35:33,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:35:33,619 INFO L85 PathProgramCache]: Analyzing trace with hash -1052143005, now seen corresponding path program 1 times [2024-06-14 12:35:33,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:35:33,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711093715] [2024-06-14 12:35:33,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:35:33,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:35:33,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:35:34,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:35:34,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:35:34,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711093715] [2024-06-14 12:35:34,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711093715] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:35:34,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:35:34,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:35:34,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644425260] [2024-06-14 12:35:34,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:35:34,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:35:34,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:35:34,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:35:34,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:35:34,672 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-14 12:35:34,673 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) [2024-06-14 12:35:34,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:35:34,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-14 12:35:34,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:35:35,946 INFO L124 PetriNetUnfolderBase]: 8101/11368 cut-off events. [2024-06-14 12:35:35,946 INFO L125 PetriNetUnfolderBase]: For 60378/60470 co-relation queries the response was YES. [2024-06-14 12:35:35,978 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. [2024-06-14 12:35:36,023 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 89 selfloop transitions, 32 changer transitions 0/130 dead transitions. [2024-06-14 12:35:36,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 130 transitions, 944 flow [2024-06-14 12:35:36,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:35:36,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:35:36,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 195 transitions. [2024-06-14 12:35:36,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2024-06-14 12:35:36,025 INFO L175 Difference]: Start difference. First operand has 76 places, 81 transitions, 478 flow. Second operand 7 states and 195 transitions. [2024-06-14 12:35:36,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 130 transitions, 944 flow [2024-06-14 12:35:36,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 130 transitions, 905 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-14 12:35:36,049 INFO L231 Difference]: Finished difference. Result has 80 places, 85 transitions, 568 flow [2024-06-14 12:35:36,049 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} [2024-06-14 12:35:36,050 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 25 predicate places. [2024-06-14 12:35:36,050 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 85 transitions, 568 flow [2024-06-14 12:35:36,051 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) [2024-06-14 12:35:36,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:35:36,051 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:35:36,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-14 12:35:36,051 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)] === [2024-06-14 12:35:36,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:35:36,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1052082555, now seen corresponding path program 2 times [2024-06-14 12:35:36,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:35:36,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978429001] [2024-06-14 12:35:36,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:35:36,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:35:36,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:35:36,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:35:36,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:35:36,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978429001] [2024-06-14 12:35:36,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978429001] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:35:36,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:35:36,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:35:36,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084619673] [2024-06-14 12:35:36,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:35:36,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:35:36,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:35:36,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:35:36,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:35:36,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-14 12:35:36,996 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) [2024-06-14 12:35:36,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:35:36,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-14 12:35:36,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:35:38,518 INFO L124 PetriNetUnfolderBase]: 8214/11557 cut-off events. [2024-06-14 12:35:38,518 INFO L125 PetriNetUnfolderBase]: For 73619/73711 co-relation queries the response was YES. [2024-06-14 12:35:38,542 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. [2024-06-14 12:35:38,584 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 86 selfloop transitions, 31 changer transitions 0/126 dead transitions. [2024-06-14 12:35:38,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 126 transitions, 938 flow [2024-06-14 12:35:38,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:35:38,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:35:38,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 191 transitions. [2024-06-14 12:35:38,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5247252747252747 [2024-06-14 12:35:38,587 INFO L175 Difference]: Start difference. First operand has 80 places, 85 transitions, 568 flow. Second operand 7 states and 191 transitions. [2024-06-14 12:35:38,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 126 transitions, 938 flow [2024-06-14 12:35:38,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 126 transitions, 891 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-14 12:35:38,657 INFO L231 Difference]: Finished difference. Result has 84 places, 88 transitions, 636 flow [2024-06-14 12:35:38,657 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} [2024-06-14 12:35:38,658 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 29 predicate places. [2024-06-14 12:35:38,658 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 88 transitions, 636 flow [2024-06-14 12:35:38,658 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) [2024-06-14 12:35:38,658 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:35:38,658 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:35:38,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-14 12:35:38,659 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)] === [2024-06-14 12:35:38,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:35:38,659 INFO L85 PathProgramCache]: Analyzing trace with hash -1421065540, now seen corresponding path program 1 times [2024-06-14 12:35:38,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:35:38,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225339748] [2024-06-14 12:35:38,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:35:38,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:35:38,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:35:39,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:35:39,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:35:39,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225339748] [2024-06-14 12:35:39,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225339748] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:35:39,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:35:39,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:35:39,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477841990] [2024-06-14 12:35:39,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:35:39,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:35:39,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:35:39,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:35:39,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:35:39,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-14 12:35:39,493 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) [2024-06-14 12:35:39,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:35:39,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-14 12:35:39,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:35:40,950 INFO L124 PetriNetUnfolderBase]: 8465/11868 cut-off events. [2024-06-14 12:35:40,951 INFO L125 PetriNetUnfolderBase]: For 83732/83732 co-relation queries the response was YES. [2024-06-14 12:35:40,987 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. [2024-06-14 12:35:41,031 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 97 selfloop transitions, 21 changer transitions 0/125 dead transitions. [2024-06-14 12:35:41,031 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 125 transitions, 1068 flow [2024-06-14 12:35:41,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:35:41,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:35:41,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-14 12:35:41,032 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5032051282051282 [2024-06-14 12:35:41,032 INFO L175 Difference]: Start difference. First operand has 84 places, 88 transitions, 636 flow. Second operand 6 states and 157 transitions. [2024-06-14 12:35:41,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 125 transitions, 1068 flow [2024-06-14 12:35:41,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 125 transitions, 989 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-14 12:35:41,085 INFO L231 Difference]: Finished difference. Result has 85 places, 96 transitions, 696 flow [2024-06-14 12:35:41,086 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} [2024-06-14 12:35:41,086 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 30 predicate places. [2024-06-14 12:35:41,087 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 96 transitions, 696 flow [2024-06-14 12:35:41,087 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) [2024-06-14 12:35:41,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:35:41,087 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:35:41,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-14 12:35:41,087 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)] === [2024-06-14 12:35:41,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:35:41,088 INFO L85 PathProgramCache]: Analyzing trace with hash 2013757149, now seen corresponding path program 1 times [2024-06-14 12:35:41,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:35:41,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709802611] [2024-06-14 12:35:41,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:35:41,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:35:41,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:35:42,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:35:42,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:35:42,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709802611] [2024-06-14 12:35:42,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709802611] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:35:42,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:35:42,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:35:42,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002831239] [2024-06-14 12:35:42,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:35:42,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:35:42,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:35:42,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:35:42,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:35:42,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-14 12:35:42,260 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) [2024-06-14 12:35:42,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:35:42,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-14 12:35:42,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:35:43,715 INFO L124 PetriNetUnfolderBase]: 8523/11946 cut-off events. [2024-06-14 12:35:43,715 INFO L125 PetriNetUnfolderBase]: For 99583/99592 co-relation queries the response was YES. [2024-06-14 12:35:43,745 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. [2024-06-14 12:35:43,790 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 100 selfloop transitions, 44 changer transitions 0/151 dead transitions. [2024-06-14 12:35:43,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 151 transitions, 1215 flow [2024-06-14 12:35:43,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:35:43,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:35:43,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-14 12:35:43,792 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49759615384615385 [2024-06-14 12:35:43,792 INFO L175 Difference]: Start difference. First operand has 85 places, 96 transitions, 696 flow. Second operand 8 states and 207 transitions. [2024-06-14 12:35:43,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 151 transitions, 1215 flow [2024-06-14 12:35:43,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 151 transitions, 1173 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-06-14 12:35:43,853 INFO L231 Difference]: Finished difference. Result has 92 places, 111 transitions, 901 flow [2024-06-14 12:35:43,853 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} [2024-06-14 12:35:43,854 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 37 predicate places. [2024-06-14 12:35:43,854 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 111 transitions, 901 flow [2024-06-14 12:35:43,854 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) [2024-06-14 12:35:43,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:35:43,854 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:35:43,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-14 12:35:43,855 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)] === [2024-06-14 12:35:43,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:35:43,855 INFO L85 PathProgramCache]: Analyzing trace with hash 2022328029, now seen corresponding path program 2 times [2024-06-14 12:35:43,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:35:43,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770129616] [2024-06-14 12:35:43,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:35:43,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:35:43,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:35:44,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:35:44,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:35:44,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770129616] [2024-06-14 12:35:44,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770129616] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:35:44,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:35:44,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:35:44,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400614185] [2024-06-14 12:35:44,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:35:44,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:35:44,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:35:44,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:35:44,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:35:44,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-14 12:35:44,867 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) [2024-06-14 12:35:44,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:35:44,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-14 12:35:44,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:35:46,382 INFO L124 PetriNetUnfolderBase]: 8600/12090 cut-off events. [2024-06-14 12:35:46,383 INFO L125 PetriNetUnfolderBase]: For 114311/114320 co-relation queries the response was YES. [2024-06-14 12:35:46,421 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. [2024-06-14 12:35:46,470 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 104 selfloop transitions, 55 changer transitions 0/166 dead transitions. [2024-06-14 12:35:46,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 166 transitions, 1527 flow [2024-06-14 12:35:46,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:35:46,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:35:46,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 214 transitions. [2024-06-14 12:35:46,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5144230769230769 [2024-06-14 12:35:46,472 INFO L175 Difference]: Start difference. First operand has 92 places, 111 transitions, 901 flow. Second operand 8 states and 214 transitions. [2024-06-14 12:35:46,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 166 transitions, 1527 flow [2024-06-14 12:35:46,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 166 transitions, 1439 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-14 12:35:46,576 INFO L231 Difference]: Finished difference. Result has 98 places, 119 transitions, 1076 flow [2024-06-14 12:35:46,576 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} [2024-06-14 12:35:46,577 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 43 predicate places. [2024-06-14 12:35:46,577 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 119 transitions, 1076 flow [2024-06-14 12:35:46,577 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) [2024-06-14 12:35:46,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:35:46,578 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:35:46,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-14 12:35:46,578 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)] === [2024-06-14 12:35:46,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:35:46,578 INFO L85 PathProgramCache]: Analyzing trace with hash 1785855999, now seen corresponding path program 3 times [2024-06-14 12:35:46,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:35:46,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694971965] [2024-06-14 12:35:46,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:35:46,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:35:46,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:35:47,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:35:47,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:35:47,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694971965] [2024-06-14 12:35:47,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694971965] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:35:47,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:35:47,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:35:47,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247557178] [2024-06-14 12:35:47,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:35:47,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:35:47,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:35:47,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:35:47,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:35:47,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-14 12:35:47,586 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) [2024-06-14 12:35:47,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:35:47,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-14 12:35:47,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:35:49,082 INFO L124 PetriNetUnfolderBase]: 8585/12089 cut-off events. [2024-06-14 12:35:49,082 INFO L125 PetriNetUnfolderBase]: For 130003/130012 co-relation queries the response was YES. [2024-06-14 12:35:49,129 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. [2024-06-14 12:35:49,183 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 109 selfloop transitions, 44 changer transitions 0/160 dead transitions. [2024-06-14 12:35:49,183 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 160 transitions, 1495 flow [2024-06-14 12:35:49,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:35:49,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:35:49,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-14 12:35:49,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49759615384615385 [2024-06-14 12:35:49,185 INFO L175 Difference]: Start difference. First operand has 98 places, 119 transitions, 1076 flow. Second operand 8 states and 207 transitions. [2024-06-14 12:35:49,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 160 transitions, 1495 flow [2024-06-14 12:35:49,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 160 transitions, 1384 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-14 12:35:49,346 INFO L231 Difference]: Finished difference. Result has 103 places, 120 transitions, 1084 flow [2024-06-14 12:35:49,346 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} [2024-06-14 12:35:49,346 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 48 predicate places. [2024-06-14 12:35:49,346 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 120 transitions, 1084 flow [2024-06-14 12:35:49,347 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) [2024-06-14 12:35:49,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:35:49,347 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:35:49,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-14 12:35:49,347 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)] === [2024-06-14 12:35:49,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:35:49,347 INFO L85 PathProgramCache]: Analyzing trace with hash -1409637700, now seen corresponding path program 2 times [2024-06-14 12:35:49,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:35:49,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530106270] [2024-06-14 12:35:49,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:35:49,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:35:49,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:35:50,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:35:50,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:35:50,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530106270] [2024-06-14 12:35:50,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530106270] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:35:50,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:35:50,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:35:50,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649383015] [2024-06-14 12:35:50,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:35:50,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:35:50,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:35:50,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:35:50,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:35:50,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-14 12:35:50,214 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) [2024-06-14 12:35:50,214 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:35:50,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-14 12:35:50,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:35:51,578 INFO L124 PetriNetUnfolderBase]: 8571/12081 cut-off events. [2024-06-14 12:35:51,578 INFO L125 PetriNetUnfolderBase]: For 141017/141032 co-relation queries the response was YES. [2024-06-14 12:35:51,619 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. [2024-06-14 12:35:51,794 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 112 selfloop transitions, 21 changer transitions 0/140 dead transitions. [2024-06-14 12:35:51,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 140 transitions, 1400 flow [2024-06-14 12:35:51,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:35:51,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:35:51,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-14 12:35:51,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47435897435897434 [2024-06-14 12:35:51,796 INFO L175 Difference]: Start difference. First operand has 103 places, 120 transitions, 1084 flow. Second operand 6 states and 148 transitions. [2024-06-14 12:35:51,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 140 transitions, 1400 flow [2024-06-14 12:35:51,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 140 transitions, 1276 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-14 12:35:51,905 INFO L231 Difference]: Finished difference. Result has 104 places, 120 transitions, 1011 flow [2024-06-14 12:35:51,905 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} [2024-06-14 12:35:51,905 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 49 predicate places. [2024-06-14 12:35:51,905 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 120 transitions, 1011 flow [2024-06-14 12:35:51,906 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) [2024-06-14 12:35:51,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:35:51,906 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:35:51,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-14 12:35:51,906 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)] === [2024-06-14 12:35:51,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:35:51,907 INFO L85 PathProgramCache]: Analyzing trace with hash -1415345668, now seen corresponding path program 1 times [2024-06-14 12:35:51,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:35:51,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95972509] [2024-06-14 12:35:51,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:35:51,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:35:51,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:35:52,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:35:52,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:35:52,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95972509] [2024-06-14 12:35:52,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95972509] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:35:52,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:35:52,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:35:52,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642101452] [2024-06-14 12:35:52,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:35:52,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:35:52,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:35:52,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:35:52,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:35:52,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-14 12:35:52,732 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) [2024-06-14 12:35:52,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:35:52,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-14 12:35:52,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:35:54,111 INFO L124 PetriNetUnfolderBase]: 7453/10807 cut-off events. [2024-06-14 12:35:54,111 INFO L125 PetriNetUnfolderBase]: For 129820/129820 co-relation queries the response was YES. [2024-06-14 12:35:54,139 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. [2024-06-14 12:35:54,177 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 125 selfloop transitions, 21 changer transitions 0/154 dead transitions. [2024-06-14 12:35:54,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 154 transitions, 1511 flow [2024-06-14 12:35:54,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:35:54,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:35:54,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 159 transitions. [2024-06-14 12:35:54,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5096153846153846 [2024-06-14 12:35:54,179 INFO L175 Difference]: Start difference. First operand has 104 places, 120 transitions, 1011 flow. Second operand 6 states and 159 transitions. [2024-06-14 12:35:54,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 154 transitions, 1511 flow [2024-06-14 12:35:54,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 154 transitions, 1452 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-14 12:35:54,266 INFO L231 Difference]: Finished difference. Result has 105 places, 128 transitions, 1091 flow [2024-06-14 12:35:54,266 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} [2024-06-14 12:35:54,266 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 50 predicate places. [2024-06-14 12:35:54,266 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 128 transitions, 1091 flow [2024-06-14 12:35:54,266 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) [2024-06-14 12:35:54,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:35:54,267 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:35:54,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-14 12:35:54,267 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)] === [2024-06-14 12:35:54,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:35:54,267 INFO L85 PathProgramCache]: Analyzing trace with hash -150366178, now seen corresponding path program 2 times [2024-06-14 12:35:54,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:35:54,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95515416] [2024-06-14 12:35:54,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:35:54,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:35:54,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:35:54,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:35:54,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:35:54,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95515416] [2024-06-14 12:35:54,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95515416] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:35:54,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:35:54,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:35:54,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657099432] [2024-06-14 12:35:54,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:35:54,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:35:54,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:35:54,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:35:54,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:35:55,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-14 12:35:55,029 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) [2024-06-14 12:35:55,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:35:55,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-14 12:35:55,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:35:56,465 INFO L124 PetriNetUnfolderBase]: 7439/10795 cut-off events. [2024-06-14 12:35:56,465 INFO L125 PetriNetUnfolderBase]: For 145976/145982 co-relation queries the response was YES. [2024-06-14 12:35:56,503 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. [2024-06-14 12:35:56,549 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 119 selfloop transitions, 21 changer transitions 0/148 dead transitions. [2024-06-14 12:35:56,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 148 transitions, 1421 flow [2024-06-14 12:35:56,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:35:56,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:35:56,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-14 12:35:56,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49038461538461536 [2024-06-14 12:35:56,552 INFO L175 Difference]: Start difference. First operand has 105 places, 128 transitions, 1091 flow. Second operand 6 states and 153 transitions. [2024-06-14 12:35:56,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 148 transitions, 1421 flow [2024-06-14 12:35:56,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 148 transitions, 1326 flow, removed 29 selfloop flow, removed 3 redundant places. [2024-06-14 12:35:56,650 INFO L231 Difference]: Finished difference. Result has 108 places, 128 transitions, 1047 flow [2024-06-14 12:35:56,650 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} [2024-06-14 12:35:56,651 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 53 predicate places. [2024-06-14 12:35:56,651 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 128 transitions, 1047 flow [2024-06-14 12:35:56,651 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) [2024-06-14 12:35:56,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:35:56,651 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:35:56,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-14 12:35:56,652 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)] === [2024-06-14 12:35:56,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:35:56,652 INFO L85 PathProgramCache]: Analyzing trace with hash -1103656260, now seen corresponding path program 1 times [2024-06-14 12:35:56,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:35:56,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936132728] [2024-06-14 12:35:56,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:35:56,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:35:56,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:35:57,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:35:57,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:35:57,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936132728] [2024-06-14 12:35:57,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936132728] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:35:57,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:35:57,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:35:57,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353303987] [2024-06-14 12:35:57,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:35:57,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:35:57,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:35:57,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:35:57,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:35:57,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-14 12:35:57,558 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) [2024-06-14 12:35:57,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:35:57,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-14 12:35:57,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:35:59,251 INFO L124 PetriNetUnfolderBase]: 8699/12293 cut-off events. [2024-06-14 12:35:59,251 INFO L125 PetriNetUnfolderBase]: For 186507/186513 co-relation queries the response was YES. [2024-06-14 12:35:59,297 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. [2024-06-14 12:35:59,360 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 129 selfloop transitions, 52 changer transitions 0/188 dead transitions. [2024-06-14 12:35:59,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 188 transitions, 1840 flow [2024-06-14 12:35:59,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:35:59,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:35:59,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 193 transitions. [2024-06-14 12:35:59,362 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5302197802197802 [2024-06-14 12:35:59,362 INFO L175 Difference]: Start difference. First operand has 108 places, 128 transitions, 1047 flow. Second operand 7 states and 193 transitions. [2024-06-14 12:35:59,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 188 transitions, 1840 flow [2024-06-14 12:35:59,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 188 transitions, 1785 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-14 12:35:59,512 INFO L231 Difference]: Finished difference. Result has 112 places, 146 transitions, 1350 flow [2024-06-14 12:35:59,512 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} [2024-06-14 12:35:59,512 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 57 predicate places. [2024-06-14 12:35:59,512 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 146 transitions, 1350 flow [2024-06-14 12:35:59,513 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) [2024-06-14 12:35:59,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:35:59,513 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:35:59,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-14 12:35:59,513 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)] === [2024-06-14 12:35:59,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:35:59,514 INFO L85 PathProgramCache]: Analyzing trace with hash 1116657265, now seen corresponding path program 1 times [2024-06-14 12:35:59,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:35:59,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287249708] [2024-06-14 12:35:59,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:35:59,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:35:59,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:36:00,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:36:00,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:36:00,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287249708] [2024-06-14 12:36:00,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287249708] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:36:00,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:36:00,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:36:00,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826025432] [2024-06-14 12:36:00,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:36:00,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:36:00,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:36:00,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:36:00,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:36:00,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-14 12:36:00,506 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) [2024-06-14 12:36:00,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:36:00,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-14 12:36:00,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:36:02,300 INFO L124 PetriNetUnfolderBase]: 8941/12662 cut-off events. [2024-06-14 12:36:02,300 INFO L125 PetriNetUnfolderBase]: For 217629/217632 co-relation queries the response was YES. [2024-06-14 12:36:02,354 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. [2024-06-14 12:36:02,410 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 143 selfloop transitions, 53 changer transitions 0/203 dead transitions. [2024-06-14 12:36:02,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 203 transitions, 1977 flow [2024-06-14 12:36:02,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:36:02,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:36:02,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 212 transitions. [2024-06-14 12:36:02,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5096153846153846 [2024-06-14 12:36:02,412 INFO L175 Difference]: Start difference. First operand has 112 places, 146 transitions, 1350 flow. Second operand 8 states and 212 transitions. [2024-06-14 12:36:02,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 203 transitions, 1977 flow [2024-06-14 12:36:02,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 203 transitions, 1881 flow, removed 36 selfloop flow, removed 3 redundant places. [2024-06-14 12:36:02,580 INFO L231 Difference]: Finished difference. Result has 119 places, 155 transitions, 1521 flow [2024-06-14 12:36:02,580 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} [2024-06-14 12:36:02,580 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 64 predicate places. [2024-06-14 12:36:02,580 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 155 transitions, 1521 flow [2024-06-14 12:36:02,581 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) [2024-06-14 12:36:02,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:36:02,581 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:36:02,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-14 12:36:02,581 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)] === [2024-06-14 12:36:02,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:36:02,582 INFO L85 PathProgramCache]: Analyzing trace with hash -325189924, now seen corresponding path program 2 times [2024-06-14 12:36:02,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:36:02,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914425595] [2024-06-14 12:36:02,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:36:02,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:36:02,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:36:03,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:36:03,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:36:03,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914425595] [2024-06-14 12:36:03,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914425595] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:36:03,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:36:03,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:36:03,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792752689] [2024-06-14 12:36:03,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:36:03,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:36:03,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:36:03,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:36:03,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:36:03,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-14 12:36:03,407 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) [2024-06-14 12:36:03,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:36:03,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-14 12:36:03,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:36:05,149 INFO L124 PetriNetUnfolderBase]: 9107/12917 cut-off events. [2024-06-14 12:36:05,150 INFO L125 PetriNetUnfolderBase]: For 234469/234475 co-relation queries the response was YES. [2024-06-14 12:36:05,199 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. [2024-06-14 12:36:05,255 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 136 selfloop transitions, 58 changer transitions 0/201 dead transitions. [2024-06-14 12:36:05,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 201 transitions, 2277 flow [2024-06-14 12:36:05,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:36:05,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:36:05,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 187 transitions. [2024-06-14 12:36:05,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5137362637362637 [2024-06-14 12:36:05,258 INFO L175 Difference]: Start difference. First operand has 119 places, 155 transitions, 1521 flow. Second operand 7 states and 187 transitions. [2024-06-14 12:36:05,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 201 transitions, 2277 flow [2024-06-14 12:36:05,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 201 transitions, 2189 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-14 12:36:05,446 INFO L231 Difference]: Finished difference. Result has 124 places, 165 transitions, 1701 flow [2024-06-14 12:36:05,446 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} [2024-06-14 12:36:05,446 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 69 predicate places. [2024-06-14 12:36:05,446 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 165 transitions, 1701 flow [2024-06-14 12:36:05,447 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) [2024-06-14 12:36:05,447 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:36:05,447 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:36:05,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-14 12:36:05,447 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)] === [2024-06-14 12:36:05,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:36:05,447 INFO L85 PathProgramCache]: Analyzing trace with hash 1386858293, now seen corresponding path program 2 times [2024-06-14 12:36:05,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:36:05,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745446896] [2024-06-14 12:36:05,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:36:05,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:36:05,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:36:06,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:36:06,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:36:06,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745446896] [2024-06-14 12:36:06,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745446896] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:36:06,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:36:06,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:36:06,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383256871] [2024-06-14 12:36:06,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:36:06,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:36:06,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:36:06,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:36:06,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:36:06,412 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-14 12:36:06,413 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) [2024-06-14 12:36:06,413 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:36:06,413 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-14 12:36:06,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:36:08,050 INFO L124 PetriNetUnfolderBase]: 9068/12837 cut-off events. [2024-06-14 12:36:08,051 INFO L125 PetriNetUnfolderBase]: For 251148/251151 co-relation queries the response was YES. [2024-06-14 12:36:08,098 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. [2024-06-14 12:36:08,153 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 139 selfloop transitions, 61 changer transitions 0/207 dead transitions. [2024-06-14 12:36:08,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 207 transitions, 2219 flow [2024-06-14 12:36:08,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:36:08,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:36:08,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 189 transitions. [2024-06-14 12:36:08,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5192307692307693 [2024-06-14 12:36:08,155 INFO L175 Difference]: Start difference. First operand has 124 places, 165 transitions, 1701 flow. Second operand 7 states and 189 transitions. [2024-06-14 12:36:08,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 207 transitions, 2219 flow [2024-06-14 12:36:08,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 207 transitions, 2099 flow, removed 28 selfloop flow, removed 3 redundant places. [2024-06-14 12:36:08,428 INFO L231 Difference]: Finished difference. Result has 128 places, 165 transitions, 1716 flow [2024-06-14 12:36:08,428 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} [2024-06-14 12:36:08,428 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 73 predicate places. [2024-06-14 12:36:08,429 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 165 transitions, 1716 flow [2024-06-14 12:36:08,429 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) [2024-06-14 12:36:08,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:36:08,429 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:36:08,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-14 12:36:08,429 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)] === [2024-06-14 12:36:08,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:36:08,430 INFO L85 PathProgramCache]: Analyzing trace with hash 1652555573, now seen corresponding path program 3 times [2024-06-14 12:36:08,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:36:08,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234006953] [2024-06-14 12:36:08,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:36:08,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:36:08,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:36:09,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:36:09,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:36:09,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234006953] [2024-06-14 12:36:09,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234006953] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:36:09,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:36:09,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:36:09,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372030039] [2024-06-14 12:36:09,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:36:09,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:36:09,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:36:09,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:36:09,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:36:09,516 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-14 12:36:09,516 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) [2024-06-14 12:36:09,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:36:09,517 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-14 12:36:09,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:36:11,245 INFO L124 PetriNetUnfolderBase]: 9029/12793 cut-off events. [2024-06-14 12:36:11,246 INFO L125 PetriNetUnfolderBase]: For 266290/266299 co-relation queries the response was YES. [2024-06-14 12:36:11,295 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. [2024-06-14 12:36:11,360 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 133 selfloop transitions, 63 changer transitions 0/203 dead transitions. [2024-06-14 12:36:11,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 203 transitions, 2220 flow [2024-06-14 12:36:11,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:36:11,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:36:11,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-14 12:36:11,362 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-14 12:36:11,362 INFO L175 Difference]: Start difference. First operand has 128 places, 165 transitions, 1716 flow. Second operand 7 states and 182 transitions. [2024-06-14 12:36:11,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 203 transitions, 2220 flow [2024-06-14 12:36:11,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 203 transitions, 2058 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-14 12:36:11,558 INFO L231 Difference]: Finished difference. Result has 128 places, 166 transitions, 1699 flow [2024-06-14 12:36:11,558 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} [2024-06-14 12:36:11,559 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 73 predicate places. [2024-06-14 12:36:11,559 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 166 transitions, 1699 flow [2024-06-14 12:36:11,559 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) [2024-06-14 12:36:11,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:36:11,559 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:36:11,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-14 12:36:11,559 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)] === [2024-06-14 12:36:11,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:36:11,560 INFO L85 PathProgramCache]: Analyzing trace with hash -749094690, now seen corresponding path program 3 times [2024-06-14 12:36:11,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:36:11,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603482928] [2024-06-14 12:36:11,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:36:11,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:36:11,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:36:12,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:36:12,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:36:12,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603482928] [2024-06-14 12:36:12,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603482928] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:36:12,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:36:12,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:36:12,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916006129] [2024-06-14 12:36:12,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:36:12,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:36:12,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:36:12,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:36:12,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:36:12,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-14 12:36:12,381 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) [2024-06-14 12:36:12,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:36:12,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-14 12:36:12,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:36:14,094 INFO L124 PetriNetUnfolderBase]: 9011/12785 cut-off events. [2024-06-14 12:36:14,095 INFO L125 PetriNetUnfolderBase]: For 263827/263848 co-relation queries the response was YES. [2024-06-14 12:36:14,137 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. [2024-06-14 12:36:14,191 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 130 selfloop transitions, 58 changer transitions 0/195 dead transitions. [2024-06-14 12:36:14,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 195 transitions, 2321 flow [2024-06-14 12:36:14,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:36:14,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:36:14,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-14 12:36:14,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4945054945054945 [2024-06-14 12:36:14,192 INFO L175 Difference]: Start difference. First operand has 128 places, 166 transitions, 1699 flow. Second operand 7 states and 180 transitions. [2024-06-14 12:36:14,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 195 transitions, 2321 flow [2024-06-14 12:36:14,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 195 transitions, 2146 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-14 12:36:14,387 INFO L231 Difference]: Finished difference. Result has 130 places, 166 transitions, 1651 flow [2024-06-14 12:36:14,387 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} [2024-06-14 12:36:14,387 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 75 predicate places. [2024-06-14 12:36:14,388 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 166 transitions, 1651 flow [2024-06-14 12:36:14,388 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) [2024-06-14 12:36:14,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:36:14,388 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:36:14,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-14 12:36:14,388 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)] === [2024-06-14 12:36:14,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:36:14,389 INFO L85 PathProgramCache]: Analyzing trace with hash -1816129354, now seen corresponding path program 1 times [2024-06-14 12:36:14,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:36:14,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689788924] [2024-06-14 12:36:14,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:36:14,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:36:14,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:36:15,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:36:15,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:36:15,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689788924] [2024-06-14 12:36:15,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689788924] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:36:15,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:36:15,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:36:15,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065663958] [2024-06-14 12:36:15,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:36:15,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:36:15,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:36:15,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:36:15,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:36:15,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-14 12:36:15,455 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) [2024-06-14 12:36:15,455 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:36:15,455 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-14 12:36:15,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:36:16,966 INFO L124 PetriNetUnfolderBase]: 7893/11484 cut-off events. [2024-06-14 12:36:16,966 INFO L125 PetriNetUnfolderBase]: For 235307/235307 co-relation queries the response was YES. [2024-06-14 12:36:17,017 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. [2024-06-14 12:36:17,077 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 173 selfloop transitions, 18 changer transitions 0/199 dead transitions. [2024-06-14 12:36:17,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 199 transitions, 2159 flow [2024-06-14 12:36:17,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:36:17,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:36:17,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-14 12:36:17,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48626373626373626 [2024-06-14 12:36:17,079 INFO L175 Difference]: Start difference. First operand has 130 places, 166 transitions, 1651 flow. Second operand 7 states and 177 transitions. [2024-06-14 12:36:17,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 199 transitions, 2159 flow [2024-06-14 12:36:17,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 199 transitions, 2002 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-14 12:36:17,366 INFO L231 Difference]: Finished difference. Result has 131 places, 170 transitions, 1599 flow [2024-06-14 12:36:17,367 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} [2024-06-14 12:36:17,367 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 76 predicate places. [2024-06-14 12:36:17,367 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 170 transitions, 1599 flow [2024-06-14 12:36:17,367 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) [2024-06-14 12:36:17,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:36:17,368 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:36:17,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-14 12:36:17,368 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)] === [2024-06-14 12:36:17,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:36:17,368 INFO L85 PathProgramCache]: Analyzing trace with hash -926041512, now seen corresponding path program 2 times [2024-06-14 12:36:17,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:36:17,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457359286] [2024-06-14 12:36:17,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:36:17,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:36:17,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:36:18,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:36:18,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:36:18,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457359286] [2024-06-14 12:36:18,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457359286] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:36:18,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:36:18,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:36:18,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22373479] [2024-06-14 12:36:18,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:36:18,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:36:18,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:36:18,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:36:18,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:36:18,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-14 12:36:18,321 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) [2024-06-14 12:36:18,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:36:18,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-14 12:36:18,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:36:19,899 INFO L124 PetriNetUnfolderBase]: 7925/11555 cut-off events. [2024-06-14 12:36:19,899 INFO L125 PetriNetUnfolderBase]: For 254394/254394 co-relation queries the response was YES. [2024-06-14 12:36:19,950 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. [2024-06-14 12:36:20,006 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 166 selfloop transitions, 35 changer transitions 0/209 dead transitions. [2024-06-14 12:36:20,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 209 transitions, 2293 flow [2024-06-14 12:36:20,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:36:20,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:36:20,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-14 12:36:20,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5027472527472527 [2024-06-14 12:36:20,009 INFO L175 Difference]: Start difference. First operand has 131 places, 170 transitions, 1599 flow. Second operand 7 states and 183 transitions. [2024-06-14 12:36:20,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 209 transitions, 2293 flow [2024-06-14 12:36:20,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 209 transitions, 2218 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-14 12:36:20,229 INFO L231 Difference]: Finished difference. Result has 133 places, 178 transitions, 1731 flow [2024-06-14 12:36:20,230 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} [2024-06-14 12:36:20,230 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 78 predicate places. [2024-06-14 12:36:20,230 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 178 transitions, 1731 flow [2024-06-14 12:36:20,230 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) [2024-06-14 12:36:20,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:36:20,230 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:36:20,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-14 12:36:20,231 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)] === [2024-06-14 12:36:20,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:36:20,231 INFO L85 PathProgramCache]: Analyzing trace with hash -366382986, now seen corresponding path program 3 times [2024-06-14 12:36:20,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:36:20,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991495216] [2024-06-14 12:36:20,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:36:20,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:36:20,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:36:21,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:36:21,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:36:21,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991495216] [2024-06-14 12:36:21,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991495216] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:36:21,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:36:21,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:36:21,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796377928] [2024-06-14 12:36:21,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:36:21,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:36:21,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:36:21,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:36:21,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:36:21,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-14 12:36:21,159 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) [2024-06-14 12:36:21,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:36:21,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-14 12:36:21,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:36:22,798 INFO L124 PetriNetUnfolderBase]: 7911/11539 cut-off events. [2024-06-14 12:36:22,798 INFO L125 PetriNetUnfolderBase]: For 277084/277087 co-relation queries the response was YES. [2024-06-14 12:36:22,844 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. [2024-06-14 12:36:22,893 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 160 selfloop transitions, 35 changer transitions 0/203 dead transitions. [2024-06-14 12:36:22,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 203 transitions, 2183 flow [2024-06-14 12:36:22,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:36:22,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:36:22,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-14 12:36:22,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48626373626373626 [2024-06-14 12:36:22,894 INFO L175 Difference]: Start difference. First operand has 133 places, 178 transitions, 1731 flow. Second operand 7 states and 177 transitions. [2024-06-14 12:36:22,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 203 transitions, 2183 flow [2024-06-14 12:36:23,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 203 transitions, 2075 flow, removed 44 selfloop flow, removed 3 redundant places. [2024-06-14 12:36:23,158 INFO L231 Difference]: Finished difference. Result has 137 places, 178 transitions, 1702 flow [2024-06-14 12:36:23,158 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} [2024-06-14 12:36:23,158 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 82 predicate places. [2024-06-14 12:36:23,159 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 178 transitions, 1702 flow [2024-06-14 12:36:23,159 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) [2024-06-14 12:36:23,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:36:23,159 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:36:23,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-14 12:36:23,159 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)] === [2024-06-14 12:36:23,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:36:23,160 INFO L85 PathProgramCache]: Analyzing trace with hash -1612890072, now seen corresponding path program 1 times [2024-06-14 12:36:23,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:36:23,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630678470] [2024-06-14 12:36:23,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:36:23,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:36:23,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:36:24,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:36:24,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:36:24,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630678470] [2024-06-14 12:36:24,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630678470] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:36:24,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:36:24,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:36:24,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107613599] [2024-06-14 12:36:24,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:36:24,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:36:24,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:36:24,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:36:24,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:36:24,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-14 12:36:24,394 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) [2024-06-14 12:36:24,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:36:24,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-14 12:36:24,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:36:26,008 INFO L124 PetriNetUnfolderBase]: 7899/11522 cut-off events. [2024-06-14 12:36:26,008 INFO L125 PetriNetUnfolderBase]: For 292250/292250 co-relation queries the response was YES. [2024-06-14 12:36:26,055 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. [2024-06-14 12:36:26,104 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 183 selfloop transitions, 17 changer transitions 0/208 dead transitions. [2024-06-14 12:36:26,105 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 208 transitions, 2256 flow [2024-06-14 12:36:26,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:36:26,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:36:26,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-14 12:36:26,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46703296703296704 [2024-06-14 12:36:26,107 INFO L175 Difference]: Start difference. First operand has 137 places, 178 transitions, 1702 flow. Second operand 7 states and 170 transitions. [2024-06-14 12:36:26,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 208 transitions, 2256 flow [2024-06-14 12:36:26,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 208 transitions, 2139 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-14 12:36:26,339 INFO L231 Difference]: Finished difference. Result has 138 places, 185 transitions, 1736 flow [2024-06-14 12:36:26,339 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} [2024-06-14 12:36:26,344 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 83 predicate places. [2024-06-14 12:36:26,344 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 185 transitions, 1736 flow [2024-06-14 12:36:26,344 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) [2024-06-14 12:36:26,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:36:26,344 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:36:26,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-14 12:36:26,344 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)] === [2024-06-14 12:36:26,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:36:26,345 INFO L85 PathProgramCache]: Analyzing trace with hash -1620762477, now seen corresponding path program 1 times [2024-06-14 12:36:26,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:36:26,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35663931] [2024-06-14 12:36:26,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:36:26,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:36:26,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:36:27,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:36:27,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:36:27,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35663931] [2024-06-14 12:36:27,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35663931] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:36:27,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:36:27,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 12:36:27,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166460202] [2024-06-14 12:36:27,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:36:27,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:36:27,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:36:27,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:36:27,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:36:27,299 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 52 [2024-06-14 12:36:27,299 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) [2024-06-14 12:36:27,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:36:27,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 52 [2024-06-14 12:36:27,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:36:28,675 INFO L124 PetriNetUnfolderBase]: 7492/11174 cut-off events. [2024-06-14 12:36:28,676 INFO L125 PetriNetUnfolderBase]: For 304697/304833 co-relation queries the response was YES. [2024-06-14 12:36:28,719 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. [2024-06-14 12:36:28,767 INFO L140 encePairwiseOnDemand]: 44/52 looper letters, 170 selfloop transitions, 10 changer transitions 0/200 dead transitions. [2024-06-14 12:36:28,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 200 transitions, 2178 flow [2024-06-14 12:36:28,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:36:28,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:36:28,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 126 transitions. [2024-06-14 12:36:28,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4846153846153846 [2024-06-14 12:36:28,769 INFO L175 Difference]: Start difference. First operand has 138 places, 185 transitions, 1736 flow. Second operand 5 states and 126 transitions. [2024-06-14 12:36:28,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 200 transitions, 2178 flow [2024-06-14 12:36:29,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 200 transitions, 2096 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-14 12:36:29,027 INFO L231 Difference]: Finished difference. Result has 139 places, 189 transitions, 1743 flow [2024-06-14 12:36:29,027 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} [2024-06-14 12:36:29,029 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 84 predicate places. [2024-06-14 12:36:29,029 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 189 transitions, 1743 flow [2024-06-14 12:36:29,029 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) [2024-06-14 12:36:29,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:36:29,029 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:36:29,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-14 12:36:29,029 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)] === [2024-06-14 12:36:29,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:36:29,030 INFO L85 PathProgramCache]: Analyzing trace with hash -1496661923, now seen corresponding path program 1 times [2024-06-14 12:36:29,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:36:29,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945256453] [2024-06-14 12:36:29,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:36:29,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:36:29,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:36:29,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:36:29,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:36:29,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945256453] [2024-06-14 12:36:29,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945256453] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:36:29,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:36:29,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:36:29,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423228522] [2024-06-14 12:36:29,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:36:29,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:36:29,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:36:29,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:36:29,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:36:29,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-14 12:36:29,964 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) [2024-06-14 12:36:29,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:36:29,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-14 12:36:29,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:36:31,914 INFO L124 PetriNetUnfolderBase]: 9197/13021 cut-off events. [2024-06-14 12:36:31,914 INFO L125 PetriNetUnfolderBase]: For 396321/396330 co-relation queries the response was YES. [2024-06-14 12:36:31,960 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. [2024-06-14 12:36:32,025 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 159 selfloop transitions, 75 changer transitions 0/241 dead transitions. [2024-06-14 12:36:32,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 241 transitions, 2703 flow [2024-06-14 12:36:32,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:36:32,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:36:32,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 189 transitions. [2024-06-14 12:36:32,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5192307692307693 [2024-06-14 12:36:32,027 INFO L175 Difference]: Start difference. First operand has 139 places, 189 transitions, 1743 flow. Second operand 7 states and 189 transitions. [2024-06-14 12:36:32,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 241 transitions, 2703 flow [2024-06-14 12:36:32,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 241 transitions, 2642 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-06-14 12:36:32,333 INFO L231 Difference]: Finished difference. Result has 144 places, 202 transitions, 2036 flow [2024-06-14 12:36:32,334 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} [2024-06-14 12:36:32,334 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 89 predicate places. [2024-06-14 12:36:32,335 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 202 transitions, 2036 flow [2024-06-14 12:36:32,335 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) [2024-06-14 12:36:32,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:36:32,335 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:36:32,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-14 12:36:32,335 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)] === [2024-06-14 12:36:32,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:36:32,336 INFO L85 PathProgramCache]: Analyzing trace with hash -531563397, now seen corresponding path program 2 times [2024-06-14 12:36:32,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:36:32,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868216734] [2024-06-14 12:36:32,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:36:32,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:36:32,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:36:33,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:36:33,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:36:33,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868216734] [2024-06-14 12:36:33,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868216734] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:36:33,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:36:33,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:36:33,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839361304] [2024-06-14 12:36:33,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:36:33,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:36:33,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:36:33,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:36:33,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:36:33,249 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-14 12:36:33,250 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) [2024-06-14 12:36:33,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:36:33,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-14 12:36:33,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:36:35,134 INFO L124 PetriNetUnfolderBase]: 9169/12976 cut-off events. [2024-06-14 12:36:35,134 INFO L125 PetriNetUnfolderBase]: For 415458/415467 co-relation queries the response was YES. [2024-06-14 12:36:35,193 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. [2024-06-14 12:36:35,256 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 160 selfloop transitions, 71 changer transitions 0/238 dead transitions. [2024-06-14 12:36:35,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 238 transitions, 2822 flow [2024-06-14 12:36:35,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:36:35,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:36:35,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 186 transitions. [2024-06-14 12:36:35,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.510989010989011 [2024-06-14 12:36:35,258 INFO L175 Difference]: Start difference. First operand has 144 places, 202 transitions, 2036 flow. Second operand 7 states and 186 transitions. [2024-06-14 12:36:35,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 238 transitions, 2822 flow [2024-06-14 12:36:35,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 238 transitions, 2695 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-14 12:36:35,878 INFO L231 Difference]: Finished difference. Result has 147 places, 202 transitions, 2063 flow [2024-06-14 12:36:35,878 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} [2024-06-14 12:36:35,878 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 92 predicate places. [2024-06-14 12:36:35,878 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 202 transitions, 2063 flow [2024-06-14 12:36:35,879 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) [2024-06-14 12:36:35,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:36:35,879 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:36:35,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-14 12:36:35,879 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)] === [2024-06-14 12:36:35,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:36:35,880 INFO L85 PathProgramCache]: Analyzing trace with hash -473150565, now seen corresponding path program 3 times [2024-06-14 12:36:35,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:36:35,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133080313] [2024-06-14 12:36:35,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:36:35,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:36:35,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:36:36,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:36:36,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:36:36,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133080313] [2024-06-14 12:36:36,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133080313] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:36:36,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:36:36,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:36:36,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559178175] [2024-06-14 12:36:36,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:36:36,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:36:36,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:36:36,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:36:36,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:36:36,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-14 12:36:36,939 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) [2024-06-14 12:36:36,939 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:36:36,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-14 12:36:36,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:36:38,764 INFO L124 PetriNetUnfolderBase]: 9145/12927 cut-off events. [2024-06-14 12:36:38,764 INFO L125 PetriNetUnfolderBase]: For 437937/437949 co-relation queries the response was YES. [2024-06-14 12:36:38,831 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. [2024-06-14 12:36:38,898 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 153 selfloop transitions, 78 changer transitions 0/238 dead transitions. [2024-06-14 12:36:38,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 238 transitions, 2857 flow [2024-06-14 12:36:38,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:36:38,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:36:38,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 186 transitions. [2024-06-14 12:36:38,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.510989010989011 [2024-06-14 12:36:38,899 INFO L175 Difference]: Start difference. First operand has 147 places, 202 transitions, 2063 flow. Second operand 7 states and 186 transitions. [2024-06-14 12:36:38,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 238 transitions, 2857 flow [2024-06-14 12:36:39,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 238 transitions, 2708 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-14 12:36:39,357 INFO L231 Difference]: Finished difference. Result has 150 places, 202 transitions, 2079 flow [2024-06-14 12:36:39,357 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} [2024-06-14 12:36:39,358 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 95 predicate places. [2024-06-14 12:36:39,358 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 202 transitions, 2079 flow [2024-06-14 12:36:39,358 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) [2024-06-14 12:36:39,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:36:39,358 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:36:39,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-14 12:36:39,358 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)] === [2024-06-14 12:36:39,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:36:39,359 INFO L85 PathProgramCache]: Analyzing trace with hash -389433551, now seen corresponding path program 4 times [2024-06-14 12:36:39,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:36:39,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009576720] [2024-06-14 12:36:39,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:36:39,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:36:39,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:36:40,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:36:40,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:36:40,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009576720] [2024-06-14 12:36:40,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009576720] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:36:40,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:36:40,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:36:40,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450755567] [2024-06-14 12:36:40,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:36:40,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:36:40,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:36:40,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:36:40,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:36:40,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-14 12:36:40,267 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) [2024-06-14 12:36:40,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:36:40,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-14 12:36:40,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:36:42,021 INFO L124 PetriNetUnfolderBase]: 9177/12969 cut-off events. [2024-06-14 12:36:42,021 INFO L125 PetriNetUnfolderBase]: For 461825/461831 co-relation queries the response was YES. [2024-06-14 12:36:42,105 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. [2024-06-14 12:36:42,175 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 148 selfloop transitions, 82 changer transitions 0/237 dead transitions. [2024-06-14 12:36:42,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 237 transitions, 2814 flow [2024-06-14 12:36:42,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:36:42,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:36:42,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-14 12:36:42,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-14 12:36:42,177 INFO L175 Difference]: Start difference. First operand has 150 places, 202 transitions, 2079 flow. Second operand 7 states and 182 transitions. [2024-06-14 12:36:42,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 237 transitions, 2814 flow [2024-06-14 12:36:42,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 237 transitions, 2473 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-14 12:36:42,642 INFO L231 Difference]: Finished difference. Result has 148 places, 206 transitions, 1980 flow [2024-06-14 12:36:42,642 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} [2024-06-14 12:36:42,642 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 93 predicate places. [2024-06-14 12:36:42,642 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 206 transitions, 1980 flow [2024-06-14 12:36:42,643 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) [2024-06-14 12:36:42,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:36:42,643 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:36:42,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-14 12:36:42,643 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)] === [2024-06-14 12:36:42,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:36:42,643 INFO L85 PathProgramCache]: Analyzing trace with hash -2121828769, now seen corresponding path program 5 times [2024-06-14 12:36:42,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:36:42,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140361001] [2024-06-14 12:36:42,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:36:42,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:36:42,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:36:43,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:36:43,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:36:43,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140361001] [2024-06-14 12:36:43,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140361001] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:36:43,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:36:43,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:36:43,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262095136] [2024-06-14 12:36:43,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:36:43,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:36:43,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:36:43,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:36:43,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:36:43,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-14 12:36:43,591 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) [2024-06-14 12:36:43,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:36:43,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-14 12:36:43,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:36:45,490 INFO L124 PetriNetUnfolderBase]: 9149/12950 cut-off events. [2024-06-14 12:36:45,490 INFO L125 PetriNetUnfolderBase]: For 480927/480951 co-relation queries the response was YES. [2024-06-14 12:36:45,554 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. [2024-06-14 12:36:45,619 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 153 selfloop transitions, 73 changer transitions 0/233 dead transitions. [2024-06-14 12:36:45,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 233 transitions, 2630 flow [2024-06-14 12:36:45,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:36:45,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:36:45,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-14 12:36:45,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.489010989010989 [2024-06-14 12:36:45,628 INFO L175 Difference]: Start difference. First operand has 148 places, 206 transitions, 1980 flow. Second operand 7 states and 178 transitions. [2024-06-14 12:36:45,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 233 transitions, 2630 flow [2024-06-14 12:36:46,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 233 transitions, 2470 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-14 12:36:46,125 INFO L231 Difference]: Finished difference. Result has 151 places, 206 transitions, 1977 flow [2024-06-14 12:36:46,126 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} [2024-06-14 12:36:46,126 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 96 predicate places. [2024-06-14 12:36:46,126 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 206 transitions, 1977 flow [2024-06-14 12:36:46,126 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) [2024-06-14 12:36:46,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:36:46,126 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:36:46,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-14 12:36:46,127 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)] === [2024-06-14 12:36:46,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:36:46,127 INFO L85 PathProgramCache]: Analyzing trace with hash -1175311583, now seen corresponding path program 6 times [2024-06-14 12:36:46,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:36:46,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645023924] [2024-06-14 12:36:46,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:36:46,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:36:46,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:36:46,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:36:46,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:36:46,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645023924] [2024-06-14 12:36:46,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645023924] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:36:46,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:36:46,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:36:46,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81944928] [2024-06-14 12:36:46,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:36:46,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:36:46,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:36:46,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:36:46,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:36:46,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-14 12:36:46,934 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) [2024-06-14 12:36:46,934 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:36:46,934 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-14 12:36:46,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:36:48,826 INFO L124 PetriNetUnfolderBase]: 9125/12909 cut-off events. [2024-06-14 12:36:48,827 INFO L125 PetriNetUnfolderBase]: For 501855/501873 co-relation queries the response was YES. [2024-06-14 12:36:48,876 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. [2024-06-14 12:36:48,934 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 147 selfloop transitions, 77 changer transitions 0/231 dead transitions. [2024-06-14 12:36:48,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 231 transitions, 2493 flow [2024-06-14 12:36:48,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:36:48,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:36:48,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-14 12:36:48,936 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4807692307692308 [2024-06-14 12:36:48,936 INFO L175 Difference]: Start difference. First operand has 151 places, 206 transitions, 1977 flow. Second operand 7 states and 175 transitions. [2024-06-14 12:36:48,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 231 transitions, 2493 flow [2024-06-14 12:36:49,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 231 transitions, 2353 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-14 12:36:49,298 INFO L231 Difference]: Finished difference. Result has 154 places, 206 transitions, 2000 flow [2024-06-14 12:36:49,298 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} [2024-06-14 12:36:49,298 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 99 predicate places. [2024-06-14 12:36:49,299 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 206 transitions, 2000 flow [2024-06-14 12:36:49,299 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) [2024-06-14 12:36:49,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:36:49,299 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:36:49,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-14 12:36:49,299 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)] === [2024-06-14 12:36:49,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:36:49,300 INFO L85 PathProgramCache]: Analyzing trace with hash 639155353, now seen corresponding path program 1 times [2024-06-14 12:36:49,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:36:49,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143390682] [2024-06-14 12:36:49,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:36:49,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:36:49,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:36:50,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:36:50,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:36:50,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143390682] [2024-06-14 12:36:50,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143390682] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:36:50,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:36:50,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:36:50,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932315974] [2024-06-14 12:36:50,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:36:50,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:36:50,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:36:50,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:36:50,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:36:50,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-14 12:36:50,333 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) [2024-06-14 12:36:50,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:36:50,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-14 12:36:50,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:36:52,345 INFO L124 PetriNetUnfolderBase]: 10531/14963 cut-off events. [2024-06-14 12:36:52,345 INFO L125 PetriNetUnfolderBase]: For 585297/585318 co-relation queries the response was YES. [2024-06-14 12:36:52,424 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. [2024-06-14 12:36:52,707 INFO L140 encePairwiseOnDemand]: 37/52 looper letters, 205 selfloop transitions, 154 changer transitions 0/366 dead transitions. [2024-06-14 12:36:52,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 366 transitions, 4185 flow [2024-06-14 12:36:52,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:36:52,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:36:52,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 248 transitions. [2024-06-14 12:36:52,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5299145299145299 [2024-06-14 12:36:52,709 INFO L175 Difference]: Start difference. First operand has 154 places, 206 transitions, 2000 flow. Second operand 9 states and 248 transitions. [2024-06-14 12:36:52,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 366 transitions, 4185 flow [2024-06-14 12:36:53,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 366 transitions, 3735 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-14 12:36:53,398 INFO L231 Difference]: Finished difference. Result has 159 places, 294 transitions, 3085 flow [2024-06-14 12:36:53,398 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} [2024-06-14 12:36:53,399 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 104 predicate places. [2024-06-14 12:36:53,399 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 294 transitions, 3085 flow [2024-06-14 12:36:53,399 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) [2024-06-14 12:36:53,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:36:53,399 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:36:53,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-14 12:36:53,399 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)] === [2024-06-14 12:36:53,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:36:53,400 INFO L85 PathProgramCache]: Analyzing trace with hash 729672057, now seen corresponding path program 2 times [2024-06-14 12:36:53,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:36:53,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175436603] [2024-06-14 12:36:53,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:36:53,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:36:53,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:36:54,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:36:54,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:36:54,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175436603] [2024-06-14 12:36:54,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175436603] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:36:54,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:36:54,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:36:54,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972854299] [2024-06-14 12:36:54,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:36:54,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:36:54,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:36:54,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:36:54,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:36:54,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-14 12:36:54,360 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) [2024-06-14 12:36:54,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:36:54,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-14 12:36:54,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:36:56,685 INFO L124 PetriNetUnfolderBase]: 11011/15656 cut-off events. [2024-06-14 12:36:56,685 INFO L125 PetriNetUnfolderBase]: For 655696/655721 co-relation queries the response was YES. [2024-06-14 12:36:56,767 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. [2024-06-14 12:36:56,850 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 176 selfloop transitions, 175 changer transitions 0/358 dead transitions. [2024-06-14 12:36:56,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 358 transitions, 4281 flow [2024-06-14 12:36:56,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:36:56,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:36:56,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 220 transitions. [2024-06-14 12:36:56,851 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5288461538461539 [2024-06-14 12:36:56,851 INFO L175 Difference]: Start difference. First operand has 159 places, 294 transitions, 3085 flow. Second operand 8 states and 220 transitions. [2024-06-14 12:36:56,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 358 transitions, 4281 flow [2024-06-14 12:36:57,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 358 transitions, 4226 flow, removed 17 selfloop flow, removed 2 redundant places. [2024-06-14 12:36:57,727 INFO L231 Difference]: Finished difference. Result has 166 places, 302 transitions, 3585 flow [2024-06-14 12:36:57,727 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} [2024-06-14 12:36:57,727 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 111 predicate places. [2024-06-14 12:36:57,728 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 302 transitions, 3585 flow [2024-06-14 12:36:57,728 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) [2024-06-14 12:36:57,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:36:57,728 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:36:57,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-14 12:36:57,728 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)] === [2024-06-14 12:36:57,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:36:57,729 INFO L85 PathProgramCache]: Analyzing trace with hash 2053201425, now seen corresponding path program 3 times [2024-06-14 12:36:57,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:36:57,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898279313] [2024-06-14 12:36:57,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:36:57,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:36:57,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:36:58,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:36:58,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:36:58,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898279313] [2024-06-14 12:36:58,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898279313] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:36:58,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:36:58,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:36:58,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124478554] [2024-06-14 12:36:58,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:36:58,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:36:58,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:36:58,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:36:58,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:36:58,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-14 12:36:58,742 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) [2024-06-14 12:36:58,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:36:58,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-14 12:36:58,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:37:01,510 INFO L124 PetriNetUnfolderBase]: 11511/16360 cut-off events. [2024-06-14 12:37:01,511 INFO L125 PetriNetUnfolderBase]: For 746687/746712 co-relation queries the response was YES. [2024-06-14 12:37:01,629 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. [2024-06-14 12:37:01,721 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 186 selfloop transitions, 164 changer transitions 0/357 dead transitions. [2024-06-14 12:37:01,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 357 transitions, 4614 flow [2024-06-14 12:37:01,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:37:01,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:37:01,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 213 transitions. [2024-06-14 12:37:01,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5120192307692307 [2024-06-14 12:37:01,723 INFO L175 Difference]: Start difference. First operand has 166 places, 302 transitions, 3585 flow. Second operand 8 states and 213 transitions. [2024-06-14 12:37:01,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 357 transitions, 4614 flow [2024-06-14 12:37:02,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 357 transitions, 4368 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-14 12:37:02,937 INFO L231 Difference]: Finished difference. Result has 169 places, 308 transitions, 3844 flow [2024-06-14 12:37:02,937 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} [2024-06-14 12:37:02,938 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 114 predicate places. [2024-06-14 12:37:02,938 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 308 transitions, 3844 flow [2024-06-14 12:37:02,938 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) [2024-06-14 12:37:02,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:37:02,938 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:37:02,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-14 12:37:02,939 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)] === [2024-06-14 12:37:02,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:37:02,939 INFO L85 PathProgramCache]: Analyzing trace with hash 353049847, now seen corresponding path program 1 times [2024-06-14 12:37:02,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:37:02,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025572996] [2024-06-14 12:37:02,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:37:02,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:37:02,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:37:04,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:37:04,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:37:04,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025572996] [2024-06-14 12:37:04,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025572996] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:37:04,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:37:04,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:37:04,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914262345] [2024-06-14 12:37:04,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:37:04,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:37:04,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:37:04,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:37:04,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:37:04,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-14 12:37:04,514 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) [2024-06-14 12:37:04,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:37:04,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-14 12:37:04,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:37:07,813 INFO L124 PetriNetUnfolderBase]: 11575/16449 cut-off events. [2024-06-14 12:37:07,814 INFO L125 PetriNetUnfolderBase]: For 699215/699220 co-relation queries the response was YES. [2024-06-14 12:37:07,907 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. [2024-06-14 12:37:07,996 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 286 selfloop transitions, 61 changer transitions 0/354 dead transitions. [2024-06-14 12:37:07,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 354 transitions, 4752 flow [2024-06-14 12:37:07,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:37:07,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:37:07,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-14 12:37:08,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4951923076923077 [2024-06-14 12:37:08,002 INFO L175 Difference]: Start difference. First operand has 169 places, 308 transitions, 3844 flow. Second operand 8 states and 206 transitions. [2024-06-14 12:37:08,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 354 transitions, 4752 flow [2024-06-14 12:37:08,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 354 transitions, 4380 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-14 12:37:08,853 INFO L231 Difference]: Finished difference. Result has 171 places, 313 transitions, 3690 flow [2024-06-14 12:37:08,853 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} [2024-06-14 12:37:08,854 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 116 predicate places. [2024-06-14 12:37:08,854 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 313 transitions, 3690 flow [2024-06-14 12:37:08,854 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) [2024-06-14 12:37:08,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:37:08,854 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:37:08,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-14 12:37:08,854 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)] === [2024-06-14 12:37:08,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:37:08,855 INFO L85 PathProgramCache]: Analyzing trace with hash 353169817, now seen corresponding path program 2 times [2024-06-14 12:37:08,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:37:08,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712191425] [2024-06-14 12:37:08,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:37:08,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:37:08,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:37:09,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:37:09,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:37:09,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712191425] [2024-06-14 12:37:09,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712191425] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:37:09,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:37:09,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:37:09,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311601309] [2024-06-14 12:37:09,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:37:09,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:37:09,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:37:09,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:37:09,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:37:09,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-14 12:37:09,909 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) [2024-06-14 12:37:09,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:37:09,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-14 12:37:09,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:37:13,034 INFO L124 PetriNetUnfolderBase]: 11731/16670 cut-off events. [2024-06-14 12:37:13,035 INFO L125 PetriNetUnfolderBase]: For 731109/731117 co-relation queries the response was YES. [2024-06-14 12:37:13,168 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. [2024-06-14 12:37:13,275 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 200 selfloop transitions, 167 changer transitions 0/374 dead transitions. [2024-06-14 12:37:13,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 374 transitions, 5126 flow [2024-06-14 12:37:13,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:37:13,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:37:13,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 216 transitions. [2024-06-14 12:37:13,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5192307692307693 [2024-06-14 12:37:13,276 INFO L175 Difference]: Start difference. First operand has 171 places, 313 transitions, 3690 flow. Second operand 8 states and 216 transitions. [2024-06-14 12:37:13,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 374 transitions, 5126 flow [2024-06-14 12:37:13,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 374 transitions, 4890 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-14 12:37:13,979 INFO L231 Difference]: Finished difference. Result has 173 places, 327 transitions, 4097 flow [2024-06-14 12:37:13,979 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} [2024-06-14 12:37:13,980 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 118 predicate places. [2024-06-14 12:37:13,980 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 327 transitions, 4097 flow [2024-06-14 12:37:13,980 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) [2024-06-14 12:37:13,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:37:13,980 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:37:13,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-14 12:37:13,981 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)] === [2024-06-14 12:37:13,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:37:13,981 INFO L85 PathProgramCache]: Analyzing trace with hash 530301337, now seen corresponding path program 3 times [2024-06-14 12:37:13,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:37:13,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003613819] [2024-06-14 12:37:13,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:37:13,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:37:13,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:37:14,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:37:14,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:37:14,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003613819] [2024-06-14 12:37:14,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003613819] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:37:14,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:37:14,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:37:14,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521574951] [2024-06-14 12:37:14,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:37:14,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:37:14,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:37:14,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:37:14,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:37:15,023 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-14 12:37:15,023 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) [2024-06-14 12:37:15,023 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:37:15,023 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-14 12:37:15,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:37:18,373 INFO L124 PetriNetUnfolderBase]: 11887/16918 cut-off events. [2024-06-14 12:37:18,373 INFO L125 PetriNetUnfolderBase]: For 794581/794589 co-relation queries the response was YES. [2024-06-14 12:37:18,482 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. [2024-06-14 12:37:18,576 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 206 selfloop transitions, 167 changer transitions 0/380 dead transitions. [2024-06-14 12:37:18,577 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 380 transitions, 5498 flow [2024-06-14 12:37:18,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:37:18,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:37:18,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 212 transitions. [2024-06-14 12:37:18,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5096153846153846 [2024-06-14 12:37:18,602 INFO L175 Difference]: Start difference. First operand has 173 places, 327 transitions, 4097 flow. Second operand 8 states and 212 transitions. [2024-06-14 12:37:18,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 380 transitions, 5498 flow [2024-06-14 12:37:19,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 380 transitions, 5320 flow, removed 64 selfloop flow, removed 3 redundant places. [2024-06-14 12:37:19,758 INFO L231 Difference]: Finished difference. Result has 178 places, 336 transitions, 4445 flow [2024-06-14 12:37:19,758 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} [2024-06-14 12:37:19,759 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 123 predicate places. [2024-06-14 12:37:19,759 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 336 transitions, 4445 flow [2024-06-14 12:37:19,759 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) [2024-06-14 12:37:19,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:37:19,759 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:37:19,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-14 12:37:19,760 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)] === [2024-06-14 12:37:19,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:37:19,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1468780243, now seen corresponding path program 4 times [2024-06-14 12:37:19,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:37:19,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213971378] [2024-06-14 12:37:19,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:37:19,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:37:19,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:37:20,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:37:20,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:37:20,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213971378] [2024-06-14 12:37:20,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213971378] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:37:20,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:37:20,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:37:20,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352405028] [2024-06-14 12:37:20,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:37:20,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:37:20,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:37:20,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:37:20,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:37:20,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-14 12:37:20,933 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) [2024-06-14 12:37:20,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:37:20,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-14 12:37:20,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:37:24,283 INFO L124 PetriNetUnfolderBase]: 12249/17433 cut-off events. [2024-06-14 12:37:24,284 INFO L125 PetriNetUnfolderBase]: For 883931/883942 co-relation queries the response was YES. [2024-06-14 12:37:24,408 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. [2024-06-14 12:37:24,531 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 230 selfloop transitions, 147 changer transitions 0/384 dead transitions. [2024-06-14 12:37:24,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 384 transitions, 5520 flow [2024-06-14 12:37:24,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:37:24,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:37:24,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-14 12:37:24,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49759615384615385 [2024-06-14 12:37:24,536 INFO L175 Difference]: Start difference. First operand has 178 places, 336 transitions, 4445 flow. Second operand 8 states and 207 transitions. [2024-06-14 12:37:24,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 384 transitions, 5520 flow [2024-06-14 12:37:25,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 384 transitions, 5267 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-06-14 12:37:25,595 INFO L231 Difference]: Finished difference. Result has 182 places, 342 transitions, 4675 flow [2024-06-14 12:37:25,600 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} [2024-06-14 12:37:25,601 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 127 predicate places. [2024-06-14 12:37:25,601 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 342 transitions, 4675 flow [2024-06-14 12:37:25,601 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) [2024-06-14 12:37:25,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:37:25,601 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:37:25,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-14 12:37:25,602 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)] === [2024-06-14 12:37:25,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:37:25,602 INFO L85 PathProgramCache]: Analyzing trace with hash 1025499663, now seen corresponding path program 1 times [2024-06-14 12:37:25,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:37:25,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214168511] [2024-06-14 12:37:25,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:37:25,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:37:25,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:37:26,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:37:26,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:37:26,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214168511] [2024-06-14 12:37:26,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214168511] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:37:26,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:37:26,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:37:26,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297024122] [2024-06-14 12:37:26,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:37:26,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:37:26,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:37:26,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:37:26,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:37:26,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-14 12:37:26,861 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) [2024-06-14 12:37:26,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:37:26,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-14 12:37:26,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:37:30,164 INFO L124 PetriNetUnfolderBase]: 12276/17454 cut-off events. [2024-06-14 12:37:30,165 INFO L125 PetriNetUnfolderBase]: For 874073/874086 co-relation queries the response was YES. [2024-06-14 12:37:30,285 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. [2024-06-14 12:37:30,408 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 341 selfloop transitions, 41 changer transitions 0/389 dead transitions. [2024-06-14 12:37:30,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 389 transitions, 5728 flow [2024-06-14 12:37:30,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:37:30,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:37:30,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-14 12:37:30,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46875 [2024-06-14 12:37:30,410 INFO L175 Difference]: Start difference. First operand has 182 places, 342 transitions, 4675 flow. Second operand 8 states and 195 transitions. [2024-06-14 12:37:30,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 389 transitions, 5728 flow [2024-06-14 12:37:31,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 389 transitions, 5437 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-14 12:37:31,753 INFO L231 Difference]: Finished difference. Result has 186 places, 351 transitions, 4647 flow [2024-06-14 12:37:31,754 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} [2024-06-14 12:37:31,754 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 131 predicate places. [2024-06-14 12:37:31,754 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 351 transitions, 4647 flow [2024-06-14 12:37:31,754 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) [2024-06-14 12:37:31,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:37:31,754 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:37:31,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-14 12:37:31,755 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)] === [2024-06-14 12:37:31,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:37:31,755 INFO L85 PathProgramCache]: Analyzing trace with hash 1396014654, now seen corresponding path program 1 times [2024-06-14 12:37:31,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:37:31,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557000197] [2024-06-14 12:37:31,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:37:31,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:37:31,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:37:32,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:37:32,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:37:32,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557000197] [2024-06-14 12:37:32,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557000197] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:37:32,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:37:32,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:37:32,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986232064] [2024-06-14 12:37:32,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:37:32,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:37:32,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:37:32,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:37:32,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:37:32,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-14 12:37:32,662 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) [2024-06-14 12:37:32,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:37:32,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-14 12:37:32,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand