./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe002_power.oepc.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe002_power.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe002_power.oepc.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe002_power.oepc.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-28 03:51:22,076 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-28 03:51:22,141 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-28 03:51:22,146 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-28 03:51:22,147 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-28 03:51:22,171 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-28 03:51:22,172 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-28 03:51:22,172 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-28 03:51:22,173 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-28 03:51:22,176 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-28 03:51:22,177 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-28 03:51:22,177 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-28 03:51:22,177 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-28 03:51:22,178 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-28 03:51:22,178 INFO L153 SettingsManager]: * Use SBE=true [2024-06-28 03:51:22,179 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-28 03:51:22,179 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-28 03:51:22,179 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-28 03:51:22,179 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-28 03:51:22,180 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-28 03:51:22,180 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-28 03:51:22,180 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-28 03:51:22,180 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-28 03:51:22,181 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-28 03:51:22,181 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-28 03:51:22,181 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-28 03:51:22,181 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-28 03:51:22,181 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-28 03:51:22,182 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-28 03:51:22,182 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-28 03:51:22,183 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-28 03:51:22,183 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-28 03:51:22,183 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 03:51:22,184 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-28 03:51:22,184 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-28 03:51:22,184 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-28 03:51:22,184 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-28 03:51:22,185 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-28 03:51:22,193 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-28 03:51:22,193 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-28 03:51:22,193 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-28 03:51:22,194 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-28 03:51:22,194 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-28 03:51:22,194 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-28 03:51:22,400 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-28 03:51:22,419 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-28 03:51:22,421 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-28 03:51:22,422 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-28 03:51:22,423 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-28 03:51:22,423 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe002_power.oepc.yml/witness.yml [2024-06-28 03:51:22,625 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-28 03:51:22,625 INFO L274 PluginConnector]: CDTParser initialized [2024-06-28 03:51:22,626 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe002_power.oepc.i [2024-06-28 03:51:23,655 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-28 03:51:23,864 INFO L384 CDTParser]: Found 1 translation units. [2024-06-28 03:51:23,865 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe002_power.oepc.i [2024-06-28 03:51:23,884 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/10e6b0e25/636dea32957d48f0ae88b909a2f46745/FLAGab9ef6f13 [2024-06-28 03:51:23,899 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/10e6b0e25/636dea32957d48f0ae88b909a2f46745 [2024-06-28 03:51:23,899 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-28 03:51:23,900 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-28 03:51:23,901 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-28 03:51:23,901 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-28 03:51:23,905 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-28 03:51:23,906 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 03:51:22" (1/2) ... [2024-06-28 03:51:23,906 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f552466 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:51:23, skipping insertion in model container [2024-06-28 03:51:23,906 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 03:51:22" (1/2) ... [2024-06-28 03:51:23,907 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3a6a1187 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:51:23, skipping insertion in model container [2024-06-28 03:51:23,908 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 03:51:23" (2/2) ... [2024-06-28 03:51:23,908 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f552466 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:51:23, skipping insertion in model container [2024-06-28 03:51:23,908 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 03:51:23" (2/2) ... [2024-06-28 03:51:23,908 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-28 03:51:24,013 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-28 03:51:24,014 INFO L97 edCorrectnessWitness]: Location invariant before [L859-L859] ((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((((((((((((((((((((((((((((((((((((0 <= __unbuffered_cnt && __unbuffered_p0_EAX$flush_delayed == (_Bool)0) && __unbuffered_p0_EAX$mem_tmp == 0) && __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0) && __unbuffered_p0_EAX$w_buff0 == 0) && __unbuffered_p0_EAX$w_buff0_used == (_Bool)0) && __unbuffered_p0_EAX$w_buff1 == 0) && __unbuffered_p0_EAX$w_buff1_used == (_Bool)0) && y$flush_delayed == (_Bool)0) && y$r_buff0_thd0 == (_Bool)0) && y$r_buff0_thd1 == (_Bool)0) && y$r_buff0_thd2 == (_Bool)0) && y$r_buff0_thd3 == (_Bool)0) && y$r_buff1_thd0 == (_Bool)0) && y$r_buff1_thd1 == (_Bool)0) && y$r_buff1_thd2 == (_Bool)0) && y$r_buff1_thd3 == (_Bool)0) && y$read_delayed == (_Bool)0) && y$read_delayed_var == 0) && y$w_buff0 == 0) && y$w_buff0_used == (_Bool)0) && y$w_buff1 == 0) && y$w_buff1_used == (_Bool)0) && (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && ((*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1) || *__unbuffered_p0_EAX$read_delayed_var == 2)))) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) && (x == 0 || x == 1)) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((y == 0 || y == 1) || y == 2)) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)))) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && ((*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1) || *__unbuffered_p0_EAX$read_delayed_var == 2))))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0) [2024-06-28 03:51:24,014 INFO L97 edCorrectnessWitness]: Location invariant before [L858-L858] ((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((((((((((((((((((((((((((((((((((((0 <= __unbuffered_cnt && __unbuffered_p0_EAX$flush_delayed == (_Bool)0) && __unbuffered_p0_EAX$mem_tmp == 0) && __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0) && __unbuffered_p0_EAX$w_buff0 == 0) && __unbuffered_p0_EAX$w_buff0_used == (_Bool)0) && __unbuffered_p0_EAX$w_buff1 == 0) && __unbuffered_p0_EAX$w_buff1_used == (_Bool)0) && y$flush_delayed == (_Bool)0) && y$r_buff0_thd0 == (_Bool)0) && y$r_buff0_thd1 == (_Bool)0) && y$r_buff0_thd2 == (_Bool)0) && y$r_buff0_thd3 == (_Bool)0) && y$r_buff1_thd0 == (_Bool)0) && y$r_buff1_thd1 == (_Bool)0) && y$r_buff1_thd2 == (_Bool)0) && y$r_buff1_thd3 == (_Bool)0) && y$read_delayed == (_Bool)0) && y$read_delayed_var == 0) && y$w_buff0 == 0) && y$w_buff0_used == (_Bool)0) && y$w_buff1 == 0) && y$w_buff1_used == (_Bool)0) && (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && ((*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1) || *__unbuffered_p0_EAX$read_delayed_var == 2)))) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) && (x == 0 || x == 1)) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((y == 0 || y == 1) || y == 2)) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)))) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && ((*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1) || *__unbuffered_p0_EAX$read_delayed_var == 2))))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0) [2024-06-28 03:51:24,014 INFO L97 edCorrectnessWitness]: Location invariant before [L856-L856] ((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((((((((((((((((((((((((((((((((((((0 <= __unbuffered_cnt && __unbuffered_p0_EAX$flush_delayed == (_Bool)0) && __unbuffered_p0_EAX$mem_tmp == 0) && __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0) && __unbuffered_p0_EAX$w_buff0 == 0) && __unbuffered_p0_EAX$w_buff0_used == (_Bool)0) && __unbuffered_p0_EAX$w_buff1 == 0) && __unbuffered_p0_EAX$w_buff1_used == (_Bool)0) && y$flush_delayed == (_Bool)0) && y$r_buff0_thd0 == (_Bool)0) && y$r_buff0_thd1 == (_Bool)0) && y$r_buff0_thd2 == (_Bool)0) && y$r_buff0_thd3 == (_Bool)0) && y$r_buff1_thd0 == (_Bool)0) && y$r_buff1_thd1 == (_Bool)0) && y$r_buff1_thd2 == (_Bool)0) && y$r_buff1_thd3 == (_Bool)0) && y$read_delayed == (_Bool)0) && y$read_delayed_var == 0) && y$w_buff0 == 0) && y$w_buff0_used == (_Bool)0) && y$w_buff1 == 0) && y$w_buff1_used == (_Bool)0) && (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && ((*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1) || *__unbuffered_p0_EAX$read_delayed_var == 2)))) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) && (x == 0 || x == 1)) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((y == 0 || y == 1) || y == 2)) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)))) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && ((*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1) || *__unbuffered_p0_EAX$read_delayed_var == 2))))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0) [2024-06-28 03:51:24,015 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-28 03:51:24,015 INFO L106 edCorrectnessWitness]: ghost_update [L854-L854] multithreaded = 1; [2024-06-28 03:51:24,051 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-28 03:51:24,373 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 03:51:24,381 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-28 03:51:24,635 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 03:51:24,694 INFO L206 MainTranslator]: Completed translation [2024-06-28 03:51:24,695 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:51:24 WrapperNode [2024-06-28 03:51:24,695 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-28 03:51:24,702 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-28 03:51:24,702 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-28 03:51:24,702 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-28 03:51:24,734 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:51:24" (1/1) ... [2024-06-28 03:51:24,762 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:51:24" (1/1) ... [2024-06-28 03:51:24,821 INFO L138 Inliner]: procedures = 175, calls = 109, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 279 [2024-06-28 03:51:24,823 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-28 03:51:24,824 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-28 03:51:24,824 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-28 03:51:24,825 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-28 03:51:24,834 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:51:24" (1/1) ... [2024-06-28 03:51:24,834 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:51:24" (1/1) ... [2024-06-28 03:51:24,838 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:51:24" (1/1) ... [2024-06-28 03:51:24,866 INFO L175 MemorySlicer]: Split 68 memory accesses to 2 slices as follows [2, 66]. 97 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 11 writes are split as follows [0, 11]. [2024-06-28 03:51:24,867 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:51:24" (1/1) ... [2024-06-28 03:51:24,868 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:51:24" (1/1) ... [2024-06-28 03:51:24,882 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:51:24" (1/1) ... [2024-06-28 03:51:24,899 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:51:24" (1/1) ... [2024-06-28 03:51:24,901 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:51:24" (1/1) ... [2024-06-28 03:51:24,908 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:51:24" (1/1) ... [2024-06-28 03:51:24,912 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-28 03:51:24,914 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-28 03:51:24,914 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-28 03:51:24,914 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-28 03:51:24,915 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:51:24" (1/1) ... [2024-06-28 03:51:24,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 03:51:24,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 03:51:24,937 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) [2024-06-28 03:51:24,940 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 [2024-06-28 03:51:24,968 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-28 03:51:24,968 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-28 03:51:24,968 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-28 03:51:24,968 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-28 03:51:24,969 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-28 03:51:24,969 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-28 03:51:24,969 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-28 03:51:24,969 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-28 03:51:24,969 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-28 03:51:24,969 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-28 03:51:24,970 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-28 03:51:24,970 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-28 03:51:24,970 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-28 03:51:24,970 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-28 03:51:24,971 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-28 03:51:24,971 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-28 03:51:24,971 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-28 03:51:24,972 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-28 03:51:25,122 INFO L244 CfgBuilder]: Building ICFG [2024-06-28 03:51:25,124 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-28 03:51:25,709 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-28 03:51:25,709 INFO L293 CfgBuilder]: Performing block encoding [2024-06-28 03:51:26,231 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-28 03:51:26,231 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-28 03:51:26,232 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 03:51:26 BoogieIcfgContainer [2024-06-28 03:51:26,232 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-28 03:51:26,234 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-28 03:51:26,234 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-28 03:51:26,236 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-28 03:51:26,236 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 03:51:22" (1/4) ... [2024-06-28 03:51:26,237 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3971d00 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 28.06 03:51:26, skipping insertion in model container [2024-06-28 03:51:26,237 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.06 03:51:23" (2/4) ... [2024-06-28 03:51:26,238 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3971d00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.06 03:51:26, skipping insertion in model container [2024-06-28 03:51:26,238 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:51:24" (3/4) ... [2024-06-28 03:51:26,238 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3971d00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.06 03:51:26, skipping insertion in model container [2024-06-28 03:51:26,238 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 03:51:26" (4/4) ... [2024-06-28 03:51:26,239 INFO L112 eAbstractionObserver]: Analyzing ICFG safe002_power.oepc.i [2024-06-28 03:51:26,253 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-28 03:51:26,253 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-28 03:51:26,254 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-28 03:51:26,314 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-28 03:51:26,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-28 03:51:26,376 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-28 03:51:26,376 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 03:51:26,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 39 events. 0/39 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 60 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-28 03:51:26,379 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-28 03:51:26,383 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-28 03:51:26,392 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-28 03:51:26,397 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;@1578659f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-28 03:51:26,397 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-28 03:51:26,401 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-28 03:51:26,401 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-28 03:51:26,402 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 03:51:26,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:51:26,402 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-28 03:51:26,403 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:51:26,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:51:26,406 INFO L85 PathProgramCache]: Analyzing trace with hash 990473450, now seen corresponding path program 1 times [2024-06-28 03:51:26,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:51:26,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833066095] [2024-06-28 03:51:26,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:51:26,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:51:26,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:51:28,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:51:28,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:51:28,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833066095] [2024-06-28 03:51:28,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833066095] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:51:28,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:51:28,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-28 03:51:28,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677879622] [2024-06-28 03:51:28,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:51:28,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-28 03:51:28,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:51:28,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-28 03:51:28,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-28 03:51:28,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:51:28,292 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:51:28,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:51:28,293 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:51:28,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:51:28,832 INFO L124 PetriNetUnfolderBase]: 1097/1694 cut-off events. [2024-06-28 03:51:28,832 INFO L125 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2024-06-28 03:51:28,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3423 conditions, 1694 events. 1097/1694 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 8205 event pairs, 643 based on Foata normal form. 2/1664 useless extension candidates. Maximal degree in co-relation 3411. Up to 1653 conditions per place. [2024-06-28 03:51:28,844 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 36 selfloop transitions, 4 changer transitions 0/46 dead transitions. [2024-06-28 03:51:28,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 46 transitions, 187 flow [2024-06-28 03:51:28,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-28 03:51:28,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-28 03:51:28,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 70 transitions. [2024-06-28 03:51:28,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2024-06-28 03:51:28,854 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 70 transitions. [2024-06-28 03:51:28,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 46 transitions, 187 flow [2024-06-28 03:51:28,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 46 transitions, 182 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-28 03:51:28,858 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-28 03:51:28,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2024-06-28 03:51:28,862 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-28 03:51:28,862 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-28 03:51:28,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:51:28,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:51:28,863 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:51:28,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-28 03:51:28,863 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:51:28,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:51:28,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1636617571, now seen corresponding path program 1 times [2024-06-28 03:51:28,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:51:28,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006772295] [2024-06-28 03:51:28,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:51:28,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:51:28,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:51:30,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:51:30,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:51:30,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006772295] [2024-06-28 03:51:30,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006772295] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:51:30,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:51:30,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-28 03:51:30,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255765253] [2024-06-28 03:51:30,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:51:30,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-28 03:51:30,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:51:30,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-28 03:51:30,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-28 03:51:30,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:51:30,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:51:30,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:51:30,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:51:30,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:51:31,531 INFO L124 PetriNetUnfolderBase]: 1088/1681 cut-off events. [2024-06-28 03:51:31,532 INFO L125 PetriNetUnfolderBase]: For 326/326 co-relation queries the response was YES. [2024-06-28 03:51:31,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3878 conditions, 1681 events. 1088/1681 cut-off events. For 326/326 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 8163 event pairs, 496 based on Foata normal form. 4/1685 useless extension candidates. Maximal degree in co-relation 3866. Up to 1616 conditions per place. [2024-06-28 03:51:31,540 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 46 selfloop transitions, 7 changer transitions 0/59 dead transitions. [2024-06-28 03:51:31,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 59 transitions, 266 flow [2024-06-28 03:51:31,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 03:51:31,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 03:51:31,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 92 transitions. [2024-06-28 03:51:31,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2024-06-28 03:51:31,542 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 92 transitions. [2024-06-28 03:51:31,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 59 transitions, 266 flow [2024-06-28 03:51:31,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 59 transitions, 262 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-28 03:51:31,543 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 138 flow [2024-06-28 03:51:31,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=138, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2024-06-28 03:51:31,544 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2024-06-28 03:51:31,544 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 138 flow [2024-06-28 03:51:31,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:51:31,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:51:31,545 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:51:31,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-28 03:51:31,545 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:51:31,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:51:31,546 INFO L85 PathProgramCache]: Analyzing trace with hash -3974875, now seen corresponding path program 1 times [2024-06-28 03:51:31,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:51:31,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137138807] [2024-06-28 03:51:31,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:51:31,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:51:31,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:51:34,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:51:34,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:51:34,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137138807] [2024-06-28 03:51:34,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137138807] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:51:34,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:51:34,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 03:51:34,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725096893] [2024-06-28 03:51:34,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:51:34,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 03:51:34,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:51:34,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 03:51:34,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-28 03:51:34,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:51:34,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 138 flow. Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:51:34,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:51:34,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:51:34,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:51:34,905 INFO L124 PetriNetUnfolderBase]: 1377/2089 cut-off events. [2024-06-28 03:51:34,905 INFO L125 PetriNetUnfolderBase]: For 1089/1089 co-relation queries the response was YES. [2024-06-28 03:51:34,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5323 conditions, 2089 events. 1377/2089 cut-off events. For 1089/1089 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9762 event pairs, 416 based on Foata normal form. 8/2097 useless extension candidates. Maximal degree in co-relation 5309. Up to 1964 conditions per place. [2024-06-28 03:51:34,916 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 63 selfloop transitions, 12 changer transitions 0/80 dead transitions. [2024-06-28 03:51:34,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 80 transitions, 398 flow [2024-06-28 03:51:34,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 03:51:34,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 03:51:34,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 126 transitions. [2024-06-28 03:51:34,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-28 03:51:34,918 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 138 flow. Second operand 6 states and 126 transitions. [2024-06-28 03:51:34,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 80 transitions, 398 flow [2024-06-28 03:51:34,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 80 transitions, 378 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-28 03:51:34,921 INFO L231 Difference]: Finished difference. Result has 50 places, 43 transitions, 181 flow [2024-06-28 03:51:34,921 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=181, PETRI_PLACES=50, PETRI_TRANSITIONS=43} [2024-06-28 03:51:34,922 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 7 predicate places. [2024-06-28 03:51:34,922 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 181 flow [2024-06-28 03:51:34,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:51:34,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:51:34,922 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:51:34,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-28 03:51:34,923 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:51:34,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:51:34,923 INFO L85 PathProgramCache]: Analyzing trace with hash -1880971802, now seen corresponding path program 1 times [2024-06-28 03:51:34,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:51:34,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148061366] [2024-06-28 03:51:34,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:51:34,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:51:34,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:51:36,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:51:36,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:51:36,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148061366] [2024-06-28 03:51:36,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148061366] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:51:36,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:51:36,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 03:51:36,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660565131] [2024-06-28 03:51:36,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:51:36,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 03:51:36,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:51:36,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 03:51:36,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-28 03:51:36,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:51:36,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 181 flow. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:51:36,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:51:36,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:51:36,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:51:37,225 INFO L124 PetriNetUnfolderBase]: 1369/2078 cut-off events. [2024-06-28 03:51:37,226 INFO L125 PetriNetUnfolderBase]: For 2042/2042 co-relation queries the response was YES. [2024-06-28 03:51:37,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5812 conditions, 2078 events. 1369/2078 cut-off events. For 2042/2042 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9771 event pairs, 527 based on Foata normal form. 3/2081 useless extension candidates. Maximal degree in co-relation 5795. Up to 2033 conditions per place. [2024-06-28 03:51:37,237 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 50 selfloop transitions, 8 changer transitions 0/62 dead transitions. [2024-06-28 03:51:37,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 62 transitions, 349 flow [2024-06-28 03:51:37,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 03:51:37,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 03:51:37,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 87 transitions. [2024-06-28 03:51:37,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4142857142857143 [2024-06-28 03:51:37,240 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 181 flow. Second operand 5 states and 87 transitions. [2024-06-28 03:51:37,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 62 transitions, 349 flow [2024-06-28 03:51:37,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 62 transitions, 322 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-28 03:51:37,245 INFO L231 Difference]: Finished difference. Result has 52 places, 46 transitions, 198 flow [2024-06-28 03:51:37,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=198, PETRI_PLACES=52, PETRI_TRANSITIONS=46} [2024-06-28 03:51:37,247 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 9 predicate places. [2024-06-28 03:51:37,247 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 46 transitions, 198 flow [2024-06-28 03:51:37,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:51:37,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:51:37,247 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:51:37,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-28 03:51:37,248 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:51:37,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:51:37,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1819418535, now seen corresponding path program 1 times [2024-06-28 03:51:37,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:51:37,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613267632] [2024-06-28 03:51:37,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:51:37,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:51:37,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:51:38,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:51:38,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:51:38,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613267632] [2024-06-28 03:51:38,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613267632] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:51:38,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:51:38,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 03:51:38,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600435764] [2024-06-28 03:51:38,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:51:38,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 03:51:38,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:51:38,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 03:51:38,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-28 03:51:38,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:51:38,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 46 transitions, 198 flow. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:51:38,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:51:38,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:51:38,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:51:39,906 INFO L124 PetriNetUnfolderBase]: 1359/2062 cut-off events. [2024-06-28 03:51:39,906 INFO L125 PetriNetUnfolderBase]: For 2884/2884 co-relation queries the response was YES. [2024-06-28 03:51:39,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6200 conditions, 2062 events. 1359/2062 cut-off events. For 2884/2884 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9505 event pairs, 566 based on Foata normal form. 4/2066 useless extension candidates. Maximal degree in co-relation 6181. Up to 2005 conditions per place. [2024-06-28 03:51:39,947 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 60 selfloop transitions, 11 changer transitions 0/75 dead transitions. [2024-06-28 03:51:39,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 75 transitions, 430 flow [2024-06-28 03:51:39,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 03:51:39,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 03:51:39,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-06-28 03:51:39,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4007936507936508 [2024-06-28 03:51:39,948 INFO L175 Difference]: Start difference. First operand has 52 places, 46 transitions, 198 flow. Second operand 6 states and 101 transitions. [2024-06-28 03:51:39,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 75 transitions, 430 flow [2024-06-28 03:51:39,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 75 transitions, 403 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-28 03:51:39,952 INFO L231 Difference]: Finished difference. Result has 57 places, 55 transitions, 265 flow [2024-06-28 03:51:39,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=265, PETRI_PLACES=57, PETRI_TRANSITIONS=55} [2024-06-28 03:51:39,952 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 14 predicate places. [2024-06-28 03:51:39,953 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 55 transitions, 265 flow [2024-06-28 03:51:39,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:51:39,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:51:39,953 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:51:39,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-28 03:51:39,953 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:51:39,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:51:39,954 INFO L85 PathProgramCache]: Analyzing trace with hash 118390085, now seen corresponding path program 1 times [2024-06-28 03:51:39,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:51:39,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219938975] [2024-06-28 03:51:39,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:51:39,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:51:39,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:51:42,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:51:42,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:51:42,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219938975] [2024-06-28 03:51:42,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219938975] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:51:42,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:51:42,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 03:51:42,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845240140] [2024-06-28 03:51:42,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:51:42,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 03:51:42,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:51:42,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 03:51:42,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 03:51:42,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:51:42,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 55 transitions, 265 flow. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:51:42,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:51:42,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:51:42,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:51:43,235 INFO L124 PetriNetUnfolderBase]: 1377/2091 cut-off events. [2024-06-28 03:51:43,235 INFO L125 PetriNetUnfolderBase]: For 4101/4103 co-relation queries the response was YES. [2024-06-28 03:51:43,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6825 conditions, 2091 events. 1377/2091 cut-off events. For 4101/4103 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9811 event pairs, 507 based on Foata normal form. 5/2096 useless extension candidates. Maximal degree in co-relation 6803. Up to 1985 conditions per place. [2024-06-28 03:51:43,251 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 65 selfloop transitions, 19 changer transitions 0/88 dead transitions. [2024-06-28 03:51:43,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 88 transitions, 557 flow [2024-06-28 03:51:43,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 03:51:43,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 03:51:43,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 111 transitions. [2024-06-28 03:51:43,255 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-28 03:51:43,255 INFO L175 Difference]: Start difference. First operand has 57 places, 55 transitions, 265 flow. Second operand 6 states and 111 transitions. [2024-06-28 03:51:43,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 88 transitions, 557 flow [2024-06-28 03:51:43,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 88 transitions, 551 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-06-28 03:51:43,260 INFO L231 Difference]: Finished difference. Result has 62 places, 61 transitions, 347 flow [2024-06-28 03:51:43,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=259, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=347, PETRI_PLACES=62, PETRI_TRANSITIONS=61} [2024-06-28 03:51:43,263 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 19 predicate places. [2024-06-28 03:51:43,263 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 61 transitions, 347 flow [2024-06-28 03:51:43,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:51:43,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:51:43,264 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:51:43,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-28 03:51:43,264 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:51:43,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:51:43,265 INFO L85 PathProgramCache]: Analyzing trace with hash 582587495, now seen corresponding path program 2 times [2024-06-28 03:51:43,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:51:43,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032093805] [2024-06-28 03:51:43,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:51:43,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:51:43,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:51:45,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:51:45,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:51:45,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032093805] [2024-06-28 03:51:45,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032093805] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:51:45,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:51:45,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 03:51:45,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107506845] [2024-06-28 03:51:45,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:51:45,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 03:51:45,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:51:45,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 03:51:45,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 03:51:45,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:51:45,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 61 transitions, 347 flow. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:51:45,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:51:45,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:51:45,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:51:46,540 INFO L124 PetriNetUnfolderBase]: 1369/2081 cut-off events. [2024-06-28 03:51:46,540 INFO L125 PetriNetUnfolderBase]: For 5638/5640 co-relation queries the response was YES. [2024-06-28 03:51:46,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7328 conditions, 2081 events. 1369/2081 cut-off events. For 5638/5640 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9756 event pairs, 510 based on Foata normal form. 5/2086 useless extension candidates. Maximal degree in co-relation 7303. Up to 1978 conditions per place. [2024-06-28 03:51:46,556 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 60 selfloop transitions, 19 changer transitions 0/83 dead transitions. [2024-06-28 03:51:46,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 83 transitions, 563 flow [2024-06-28 03:51:46,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 03:51:46,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 03:51:46,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-28 03:51:46,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-28 03:51:46,560 INFO L175 Difference]: Start difference. First operand has 62 places, 61 transitions, 347 flow. Second operand 6 states and 105 transitions. [2024-06-28 03:51:46,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 83 transitions, 563 flow [2024-06-28 03:51:46,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 83 transitions, 530 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-28 03:51:46,567 INFO L231 Difference]: Finished difference. Result has 66 places, 61 transitions, 361 flow [2024-06-28 03:51:46,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=314, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=361, PETRI_PLACES=66, PETRI_TRANSITIONS=61} [2024-06-28 03:51:46,568 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 23 predicate places. [2024-06-28 03:51:46,568 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 61 transitions, 361 flow [2024-06-28 03:51:46,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:51:46,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:51:46,569 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:51:46,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-28 03:51:46,569 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:51:46,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:51:46,570 INFO L85 PathProgramCache]: Analyzing trace with hash -1697896414, now seen corresponding path program 1 times [2024-06-28 03:51:46,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:51:46,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518960678] [2024-06-28 03:51:46,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:51:46,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:51:46,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:51:48,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:51:48,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:51:48,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518960678] [2024-06-28 03:51:48,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518960678] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:51:48,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:51:48,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:51:48,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240253456] [2024-06-28 03:51:48,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:51:48,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:51:48,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:51:48,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:51:48,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:51:48,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:51:48,935 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 61 transitions, 361 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:51:48,935 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:51:48,935 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:51:48,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:51:50,115 INFO L124 PetriNetUnfolderBase]: 1447/2205 cut-off events. [2024-06-28 03:51:50,116 INFO L125 PetriNetUnfolderBase]: For 6827/6829 co-relation queries the response was YES. [2024-06-28 03:51:50,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7901 conditions, 2205 events. 1447/2205 cut-off events. For 6827/6829 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 10340 event pairs, 504 based on Foata normal form. 5/2210 useless extension candidates. Maximal degree in co-relation 7874. Up to 2064 conditions per place. [2024-06-28 03:51:50,137 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 83 selfloop transitions, 27 changer transitions 0/114 dead transitions. [2024-06-28 03:51:50,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 114 transitions, 767 flow [2024-06-28 03:51:50,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:51:50,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:51:50,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-28 03:51:50,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-28 03:51:50,145 INFO L175 Difference]: Start difference. First operand has 66 places, 61 transitions, 361 flow. Second operand 8 states and 145 transitions. [2024-06-28 03:51:50,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 114 transitions, 767 flow [2024-06-28 03:51:50,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 114 transitions, 703 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-28 03:51:50,157 INFO L231 Difference]: Finished difference. Result has 70 places, 76 transitions, 477 flow [2024-06-28 03:51:50,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=309, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=477, PETRI_PLACES=70, PETRI_TRANSITIONS=76} [2024-06-28 03:51:50,159 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 27 predicate places. [2024-06-28 03:51:50,160 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 76 transitions, 477 flow [2024-06-28 03:51:50,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:51:50,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:51:50,160 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:51:50,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-28 03:51:50,160 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:51:50,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:51:50,161 INFO L85 PathProgramCache]: Analyzing trace with hash 402915778, now seen corresponding path program 2 times [2024-06-28 03:51:50,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:51:50,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053092266] [2024-06-28 03:51:50,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:51:50,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:51:50,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:51:53,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:51:53,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:51:53,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053092266] [2024-06-28 03:51:53,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053092266] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:51:53,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:51:53,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:51:53,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861634796] [2024-06-28 03:51:53,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:51:53,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:51:53,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:51:53,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:51:53,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:51:53,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:51:53,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 76 transitions, 477 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:51:53,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:51:53,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:51:53,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:51:54,171 INFO L124 PetriNetUnfolderBase]: 1465/2243 cut-off events. [2024-06-28 03:51:54,172 INFO L125 PetriNetUnfolderBase]: For 8828/8832 co-relation queries the response was YES. [2024-06-28 03:51:54,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8693 conditions, 2243 events. 1465/2243 cut-off events. For 8828/8832 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 10639 event pairs, 486 based on Foata normal form. 7/2250 useless extension candidates. Maximal degree in co-relation 8664. Up to 2064 conditions per place. [2024-06-28 03:51:54,184 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 82 selfloop transitions, 28 changer transitions 0/114 dead transitions. [2024-06-28 03:51:54,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 114 transitions, 839 flow [2024-06-28 03:51:54,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:51:54,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:51:54,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-28 03:51:54,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43197278911564624 [2024-06-28 03:51:54,186 INFO L175 Difference]: Start difference. First operand has 70 places, 76 transitions, 477 flow. Second operand 7 states and 127 transitions. [2024-06-28 03:51:54,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 114 transitions, 839 flow [2024-06-28 03:51:54,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 114 transitions, 793 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-28 03:51:54,194 INFO L231 Difference]: Finished difference. Result has 74 places, 79 transitions, 534 flow [2024-06-28 03:51:54,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=431, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=534, PETRI_PLACES=74, PETRI_TRANSITIONS=79} [2024-06-28 03:51:54,194 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 31 predicate places. [2024-06-28 03:51:54,195 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 79 transitions, 534 flow [2024-06-28 03:51:54,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:51:54,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:51:54,195 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:51:54,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-28 03:51:54,195 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:51:54,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:51:54,196 INFO L85 PathProgramCache]: Analyzing trace with hash 402920428, now seen corresponding path program 3 times [2024-06-28 03:51:54,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:51:54,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596247712] [2024-06-28 03:51:54,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:51:54,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:51:54,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:51:56,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:51:56,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:51:56,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596247712] [2024-06-28 03:51:56,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596247712] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:51:56,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:51:56,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:51:56,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130780972] [2024-06-28 03:51:56,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:51:56,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:51:56,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:51:56,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:51:56,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:51:56,869 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:51:56,869 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 79 transitions, 534 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:51:56,870 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:51:56,870 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:51:56,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:51:58,218 INFO L124 PetriNetUnfolderBase]: 1601/2462 cut-off events. [2024-06-28 03:51:58,219 INFO L125 PetriNetUnfolderBase]: For 12508/12512 co-relation queries the response was YES. [2024-06-28 03:51:58,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10203 conditions, 2462 events. 1601/2462 cut-off events. For 12508/12512 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 11939 event pairs, 824 based on Foata normal form. 5/2467 useless extension candidates. Maximal degree in co-relation 10173. Up to 2199 conditions per place. [2024-06-28 03:51:58,232 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 92 selfloop transitions, 42 changer transitions 0/138 dead transitions. [2024-06-28 03:51:58,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 138 transitions, 1193 flow [2024-06-28 03:51:58,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:51:58,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:51:58,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-28 03:51:58,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-28 03:51:58,249 INFO L175 Difference]: Start difference. First operand has 74 places, 79 transitions, 534 flow. Second operand 8 states and 135 transitions. [2024-06-28 03:51:58,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 138 transitions, 1193 flow [2024-06-28 03:51:58,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 138 transitions, 1086 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-28 03:51:58,260 INFO L231 Difference]: Finished difference. Result has 80 places, 105 transitions, 846 flow [2024-06-28 03:51:58,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=471, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=846, PETRI_PLACES=80, PETRI_TRANSITIONS=105} [2024-06-28 03:51:58,260 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 37 predicate places. [2024-06-28 03:51:58,260 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 105 transitions, 846 flow [2024-06-28 03:51:58,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:51:58,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:51:58,261 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:51:58,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-28 03:51:58,261 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:51:58,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:51:58,262 INFO L85 PathProgramCache]: Analyzing trace with hash 601806412, now seen corresponding path program 4 times [2024-06-28 03:51:58,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:51:58,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093611177] [2024-06-28 03:51:58,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:51:58,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:51:58,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:52:00,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:52:00,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:52:00,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093611177] [2024-06-28 03:52:00,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093611177] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:52:00,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:52:00,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:52:00,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667442436] [2024-06-28 03:52:00,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:52:00,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:52:00,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:52:00,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:52:00,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:52:00,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:52:00,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 105 transitions, 846 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:52:00,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:52:00,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:52:00,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:52:02,350 INFO L124 PetriNetUnfolderBase]: 1711/2614 cut-off events. [2024-06-28 03:52:02,350 INFO L125 PetriNetUnfolderBase]: For 16230/16234 co-relation queries the response was YES. [2024-06-28 03:52:02,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11761 conditions, 2614 events. 1711/2614 cut-off events. For 16230/16234 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 12667 event pairs, 527 based on Foata normal form. 7/2621 useless extension candidates. Maximal degree in co-relation 11727. Up to 2175 conditions per place. [2024-06-28 03:52:02,394 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 84 selfloop transitions, 84 changer transitions 0/172 dead transitions. [2024-06-28 03:52:02,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 172 transitions, 1658 flow [2024-06-28 03:52:02,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:52:02,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:52:02,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-28 03:52:02,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-28 03:52:02,396 INFO L175 Difference]: Start difference. First operand has 80 places, 105 transitions, 846 flow. Second operand 8 states and 150 transitions. [2024-06-28 03:52:02,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 172 transitions, 1658 flow [2024-06-28 03:52:02,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 172 transitions, 1588 flow, removed 34 selfloop flow, removed 1 redundant places. [2024-06-28 03:52:02,416 INFO L231 Difference]: Finished difference. Result has 89 places, 131 transitions, 1299 flow [2024-06-28 03:52:02,416 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=820, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1299, PETRI_PLACES=89, PETRI_TRANSITIONS=131} [2024-06-28 03:52:02,416 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 46 predicate places. [2024-06-28 03:52:02,417 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 131 transitions, 1299 flow [2024-06-28 03:52:02,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:52:02,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:52:02,417 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:52:02,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-28 03:52:02,417 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:52:02,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:52:02,418 INFO L85 PathProgramCache]: Analyzing trace with hash 587016808, now seen corresponding path program 1 times [2024-06-28 03:52:02,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:52:02,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429037837] [2024-06-28 03:52:02,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:52:02,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:52:02,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:52:04,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:52:04,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:52:04,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429037837] [2024-06-28 03:52:04,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429037837] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:52:04,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:52:04,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:52:04,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903009895] [2024-06-28 03:52:04,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:52:04,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:52:04,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:52:04,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:52:04,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:52:04,213 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:52:04,214 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 131 transitions, 1299 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:52:04,214 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:52:04,214 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:52:04,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:52:05,911 INFO L124 PetriNetUnfolderBase]: 2043/3113 cut-off events. [2024-06-28 03:52:05,911 INFO L125 PetriNetUnfolderBase]: For 23271/23277 co-relation queries the response was YES. [2024-06-28 03:52:05,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14614 conditions, 3113 events. 2043/3113 cut-off events. For 23271/23277 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 15517 event pairs, 763 based on Foata normal form. 16/3129 useless extension candidates. Maximal degree in co-relation 14575. Up to 2594 conditions per place. [2024-06-28 03:52:05,930 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 153 selfloop transitions, 58 changer transitions 0/215 dead transitions. [2024-06-28 03:52:05,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 215 transitions, 2190 flow [2024-06-28 03:52:05,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 03:52:05,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 03:52:05,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 205 transitions. [2024-06-28 03:52:05,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44372294372294374 [2024-06-28 03:52:05,941 INFO L175 Difference]: Start difference. First operand has 89 places, 131 transitions, 1299 flow. Second operand 11 states and 205 transitions. [2024-06-28 03:52:05,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 215 transitions, 2190 flow [2024-06-28 03:52:05,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 215 transitions, 2089 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-28 03:52:05,965 INFO L231 Difference]: Finished difference. Result has 101 places, 155 transitions, 1545 flow [2024-06-28 03:52:05,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1198, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1545, PETRI_PLACES=101, PETRI_TRANSITIONS=155} [2024-06-28 03:52:05,966 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 58 predicate places. [2024-06-28 03:52:05,966 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 155 transitions, 1545 flow [2024-06-28 03:52:05,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:52:05,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:52:05,967 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:52:05,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-28 03:52:05,969 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:52:05,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:52:05,970 INFO L85 PathProgramCache]: Analyzing trace with hash 553555202, now seen corresponding path program 2 times [2024-06-28 03:52:05,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:52:05,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671030017] [2024-06-28 03:52:05,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:52:05,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:52:05,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:52:08,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:52:08,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:52:08,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671030017] [2024-06-28 03:52:08,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671030017] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:52:08,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:52:08,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:52:08,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836625641] [2024-06-28 03:52:08,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:52:08,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:52:08,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:52:08,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:52:08,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:52:08,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:52:08,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 155 transitions, 1545 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:52:08,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:52:08,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:52:08,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:52:09,724 INFO L124 PetriNetUnfolderBase]: 2259/3415 cut-off events. [2024-06-28 03:52:09,724 INFO L125 PetriNetUnfolderBase]: For 31054/31060 co-relation queries the response was YES. [2024-06-28 03:52:09,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17535 conditions, 3415 events. 2259/3415 cut-off events. For 31054/31060 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 16997 event pairs, 773 based on Foata normal form. 24/3439 useless extension candidates. Maximal degree in co-relation 17491. Up to 2758 conditions per place. [2024-06-28 03:52:09,747 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 142 selfloop transitions, 72 changer transitions 0/218 dead transitions. [2024-06-28 03:52:09,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 218 transitions, 2387 flow [2024-06-28 03:52:09,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:52:09,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:52:09,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-28 03:52:09,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-28 03:52:09,749 INFO L175 Difference]: Start difference. First operand has 101 places, 155 transitions, 1545 flow. Second operand 9 states and 166 transitions. [2024-06-28 03:52:09,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 218 transitions, 2387 flow [2024-06-28 03:52:09,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 218 transitions, 2297 flow, removed 27 selfloop flow, removed 3 redundant places. [2024-06-28 03:52:09,787 INFO L231 Difference]: Finished difference. Result has 109 places, 172 transitions, 1811 flow [2024-06-28 03:52:09,787 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1463, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1811, PETRI_PLACES=109, PETRI_TRANSITIONS=172} [2024-06-28 03:52:09,788 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 66 predicate places. [2024-06-28 03:52:09,788 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 172 transitions, 1811 flow [2024-06-28 03:52:09,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:52:09,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:52:09,788 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:52:09,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-28 03:52:09,788 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:52:09,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:52:09,789 INFO L85 PathProgramCache]: Analyzing trace with hash 880345228, now seen corresponding path program 5 times [2024-06-28 03:52:09,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:52:09,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823918168] [2024-06-28 03:52:09,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:52:09,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:52:09,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:52:12,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:52:12,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:52:12,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823918168] [2024-06-28 03:52:12,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823918168] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:52:12,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:52:12,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:52:12,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314326081] [2024-06-28 03:52:12,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:52:12,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:52:12,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:52:12,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:52:12,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:52:12,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:52:12,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 172 transitions, 1811 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:52:12,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:52:12,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:52:12,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:52:13,499 INFO L124 PetriNetUnfolderBase]: 2245/3370 cut-off events. [2024-06-28 03:52:13,500 INFO L125 PetriNetUnfolderBase]: For 34559/34563 co-relation queries the response was YES. [2024-06-28 03:52:13,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18588 conditions, 3370 events. 2245/3370 cut-off events. For 34559/34563 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 16328 event pairs, 616 based on Foata normal form. 6/3376 useless extension candidates. Maximal degree in co-relation 18541. Up to 2931 conditions per place. [2024-06-28 03:52:13,521 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 113 selfloop transitions, 82 changer transitions 0/199 dead transitions. [2024-06-28 03:52:13,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 199 transitions, 2332 flow [2024-06-28 03:52:13,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:52:13,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:52:13,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-28 03:52:13,523 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41836734693877553 [2024-06-28 03:52:13,523 INFO L175 Difference]: Start difference. First operand has 109 places, 172 transitions, 1811 flow. Second operand 7 states and 123 transitions. [2024-06-28 03:52:13,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 199 transitions, 2332 flow [2024-06-28 03:52:13,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 199 transitions, 2161 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-28 03:52:13,561 INFO L231 Difference]: Finished difference. Result has 110 places, 172 transitions, 1816 flow [2024-06-28 03:52:13,562 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1640, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1816, PETRI_PLACES=110, PETRI_TRANSITIONS=172} [2024-06-28 03:52:13,562 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 67 predicate places. [2024-06-28 03:52:13,562 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 172 transitions, 1816 flow [2024-06-28 03:52:13,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:52:13,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:52:13,563 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:52:13,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-28 03:52:13,563 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:52:13,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:52:13,563 INFO L85 PathProgramCache]: Analyzing trace with hash 409586854, now seen corresponding path program 3 times [2024-06-28 03:52:13,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:52:13,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069421129] [2024-06-28 03:52:13,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:52:13,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:52:13,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:52:15,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:52:15,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:52:15,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069421129] [2024-06-28 03:52:15,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069421129] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:52:15,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:52:15,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:52:15,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157280685] [2024-06-28 03:52:15,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:52:15,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:52:15,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:52:15,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:52:15,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:52:15,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:52:15,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 172 transitions, 1816 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:52:15,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:52:15,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:52:15,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:52:16,903 INFO L124 PetriNetUnfolderBase]: 2235/3367 cut-off events. [2024-06-28 03:52:16,903 INFO L125 PetriNetUnfolderBase]: For 36692/36698 co-relation queries the response was YES. [2024-06-28 03:52:16,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18193 conditions, 3367 events. 2235/3367 cut-off events. For 36692/36698 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 16464 event pairs, 778 based on Foata normal form. 10/3377 useless extension candidates. Maximal degree in co-relation 18146. Up to 3039 conditions per place. [2024-06-28 03:52:16,924 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 181 selfloop transitions, 46 changer transitions 0/231 dead transitions. [2024-06-28 03:52:16,925 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 231 transitions, 2772 flow [2024-06-28 03:52:16,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:52:16,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:52:16,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-28 03:52:16,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41496598639455784 [2024-06-28 03:52:16,927 INFO L175 Difference]: Start difference. First operand has 110 places, 172 transitions, 1816 flow. Second operand 7 states and 122 transitions. [2024-06-28 03:52:16,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 231 transitions, 2772 flow [2024-06-28 03:52:16,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 231 transitions, 2580 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-28 03:52:16,963 INFO L231 Difference]: Finished difference. Result has 115 places, 204 transitions, 2195 flow [2024-06-28 03:52:16,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1644, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2195, PETRI_PLACES=115, PETRI_TRANSITIONS=204} [2024-06-28 03:52:16,963 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 72 predicate places. [2024-06-28 03:52:16,963 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 204 transitions, 2195 flow [2024-06-28 03:52:16,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:52:16,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:52:16,964 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:52:16,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-28 03:52:16,964 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:52:16,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:52:16,964 INFO L85 PathProgramCache]: Analyzing trace with hash -447740888, now seen corresponding path program 4 times [2024-06-28 03:52:16,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:52:16,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933802939] [2024-06-28 03:52:16,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:52:16,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:52:16,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:52:19,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:52:19,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:52:19,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933802939] [2024-06-28 03:52:19,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933802939] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:52:19,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:52:19,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:52:19,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423578837] [2024-06-28 03:52:19,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:52:19,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:52:19,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:52:19,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:52:19,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:52:19,284 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:52:19,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 204 transitions, 2195 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:52:19,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:52:19,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:52:19,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:52:20,469 INFO L124 PetriNetUnfolderBase]: 2263/3409 cut-off events. [2024-06-28 03:52:20,470 INFO L125 PetriNetUnfolderBase]: For 40929/40945 co-relation queries the response was YES. [2024-06-28 03:52:20,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19036 conditions, 3409 events. 2263/3409 cut-off events. For 40929/40945 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 16690 event pairs, 799 based on Foata normal form. 34/3443 useless extension candidates. Maximal degree in co-relation 18985. Up to 3035 conditions per place. [2024-06-28 03:52:20,491 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 169 selfloop transitions, 73 changer transitions 0/246 dead transitions. [2024-06-28 03:52:20,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 246 transitions, 2950 flow [2024-06-28 03:52:20,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:52:20,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:52:20,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-28 03:52:20,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-28 03:52:20,493 INFO L175 Difference]: Start difference. First operand has 115 places, 204 transitions, 2195 flow. Second operand 8 states and 139 transitions. [2024-06-28 03:52:20,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 246 transitions, 2950 flow [2024-06-28 03:52:20,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 246 transitions, 2904 flow, removed 22 selfloop flow, removed 1 redundant places. [2024-06-28 03:52:20,538 INFO L231 Difference]: Finished difference. Result has 123 places, 216 transitions, 2479 flow [2024-06-28 03:52:20,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2155, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2479, PETRI_PLACES=123, PETRI_TRANSITIONS=216} [2024-06-28 03:52:20,539 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 80 predicate places. [2024-06-28 03:52:20,539 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 216 transitions, 2479 flow [2024-06-28 03:52:20,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:52:20,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:52:20,540 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:52:20,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-28 03:52:20,540 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:52:20,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:52:20,540 INFO L85 PathProgramCache]: Analyzing trace with hash 409595782, now seen corresponding path program 1 times [2024-06-28 03:52:20,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:52:20,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380831632] [2024-06-28 03:52:20,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:52:20,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:52:20,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:52:23,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:52:23,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:52:23,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380831632] [2024-06-28 03:52:23,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380831632] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:52:23,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:52:23,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:52:23,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091414138] [2024-06-28 03:52:23,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:52:23,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:52:23,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:52:23,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:52:23,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:52:23,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:52:23,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 216 transitions, 2479 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:52:23,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:52:23,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:52:23,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:52:24,519 INFO L124 PetriNetUnfolderBase]: 2255/3390 cut-off events. [2024-06-28 03:52:24,519 INFO L125 PetriNetUnfolderBase]: For 44316/44316 co-relation queries the response was YES. [2024-06-28 03:52:24,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19627 conditions, 3390 events. 2255/3390 cut-off events. For 44316/44316 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 16534 event pairs, 898 based on Foata normal form. 4/3394 useless extension candidates. Maximal degree in co-relation 19572. Up to 3257 conditions per place. [2024-06-28 03:52:24,543 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 225 selfloop transitions, 14 changer transitions 0/243 dead transitions. [2024-06-28 03:52:24,544 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 243 transitions, 3061 flow [2024-06-28 03:52:24,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:52:24,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:52:24,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-28 03:52:24,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3945578231292517 [2024-06-28 03:52:24,553 INFO L175 Difference]: Start difference. First operand has 123 places, 216 transitions, 2479 flow. Second operand 7 states and 116 transitions. [2024-06-28 03:52:24,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 243 transitions, 3061 flow [2024-06-28 03:52:24,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 243 transitions, 2945 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-28 03:52:24,605 INFO L231 Difference]: Finished difference. Result has 126 places, 218 transitions, 2422 flow [2024-06-28 03:52:24,606 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2363, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2422, PETRI_PLACES=126, PETRI_TRANSITIONS=218} [2024-06-28 03:52:24,612 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 83 predicate places. [2024-06-28 03:52:24,612 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 218 transitions, 2422 flow [2024-06-28 03:52:24,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:52:24,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:52:24,613 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:52:24,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-28 03:52:24,613 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:52:24,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:52:24,614 INFO L85 PathProgramCache]: Analyzing trace with hash -573972151, now seen corresponding path program 1 times [2024-06-28 03:52:24,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:52:24,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846364885] [2024-06-28 03:52:24,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:52:24,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:52:24,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:52:26,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:52:26,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:52:26,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846364885] [2024-06-28 03:52:26,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846364885] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:52:26,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:52:26,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:52:26,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274160118] [2024-06-28 03:52:26,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:52:26,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:52:26,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:52:26,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:52:26,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:52:26,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:52:26,453 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 218 transitions, 2422 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:52:26,453 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:52:26,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:52:26,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:52:28,360 INFO L124 PetriNetUnfolderBase]: 2575/3860 cut-off events. [2024-06-28 03:52:28,361 INFO L125 PetriNetUnfolderBase]: For 51864/51874 co-relation queries the response was YES. [2024-06-28 03:52:28,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22417 conditions, 3860 events. 2575/3860 cut-off events. For 51864/51874 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 19230 event pairs, 793 based on Foata normal form. 20/3880 useless extension candidates. Maximal degree in co-relation 22360. Up to 3277 conditions per place. [2024-06-28 03:52:28,388 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 244 selfloop transitions, 88 changer transitions 0/336 dead transitions. [2024-06-28 03:52:28,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 336 transitions, 4051 flow [2024-06-28 03:52:28,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-28 03:52:28,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-28 03:52:28,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 246 transitions. [2024-06-28 03:52:28,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41836734693877553 [2024-06-28 03:52:28,390 INFO L175 Difference]: Start difference. First operand has 126 places, 218 transitions, 2422 flow. Second operand 14 states and 246 transitions. [2024-06-28 03:52:28,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 336 transitions, 4051 flow [2024-06-28 03:52:28,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 336 transitions, 4008 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-28 03:52:28,458 INFO L231 Difference]: Finished difference. Result has 139 places, 260 transitions, 3088 flow [2024-06-28 03:52:28,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2379, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=3088, PETRI_PLACES=139, PETRI_TRANSITIONS=260} [2024-06-28 03:52:28,459 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 96 predicate places. [2024-06-28 03:52:28,459 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 260 transitions, 3088 flow [2024-06-28 03:52:28,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:52:28,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:52:28,460 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:52:28,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-28 03:52:28,460 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:52:28,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:52:28,460 INFO L85 PathProgramCache]: Analyzing trace with hash 1188780213, now seen corresponding path program 2 times [2024-06-28 03:52:28,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:52:28,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572909523] [2024-06-28 03:52:28,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:52:28,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:52:28,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:52:30,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:52:30,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:52:30,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572909523] [2024-06-28 03:52:30,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572909523] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:52:30,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:52:30,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:52:30,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71730386] [2024-06-28 03:52:30,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:52:30,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:52:30,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:52:30,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:52:30,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:52:30,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:52:30,572 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 260 transitions, 3088 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:52:30,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:52:30,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:52:30,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:52:32,558 INFO L124 PetriNetUnfolderBase]: 2841/4229 cut-off events. [2024-06-28 03:52:32,558 INFO L125 PetriNetUnfolderBase]: For 65571/65579 co-relation queries the response was YES. [2024-06-28 03:52:32,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26582 conditions, 4229 events. 2841/4229 cut-off events. For 65571/65579 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 21230 event pairs, 641 based on Foata normal form. 20/4249 useless extension candidates. Maximal degree in co-relation 26520. Up to 3714 conditions per place. [2024-06-28 03:52:32,588 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 248 selfloop transitions, 90 changer transitions 0/342 dead transitions. [2024-06-28 03:52:32,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 342 transitions, 4492 flow [2024-06-28 03:52:32,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 03:52:32,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 03:52:32,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 210 transitions. [2024-06-28 03:52:32,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-28 03:52:32,590 INFO L175 Difference]: Start difference. First operand has 139 places, 260 transitions, 3088 flow. Second operand 12 states and 210 transitions. [2024-06-28 03:52:32,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 342 transitions, 4492 flow [2024-06-28 03:52:32,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 342 transitions, 4079 flow, removed 139 selfloop flow, removed 6 redundant places. [2024-06-28 03:52:32,690 INFO L231 Difference]: Finished difference. Result has 146 places, 287 transitions, 3347 flow [2024-06-28 03:52:32,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2805, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3347, PETRI_PLACES=146, PETRI_TRANSITIONS=287} [2024-06-28 03:52:32,690 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 103 predicate places. [2024-06-28 03:52:32,691 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 287 transitions, 3347 flow [2024-06-28 03:52:32,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:52:32,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:52:32,691 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:52:32,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-28 03:52:32,691 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:52:32,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:52:32,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1460944011, now seen corresponding path program 3 times [2024-06-28 03:52:32,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:52:32,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775259237] [2024-06-28 03:52:32,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:52:32,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:52:32,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:52:34,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:52:34,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:52:34,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775259237] [2024-06-28 03:52:34,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775259237] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:52:34,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:52:34,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:52:34,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685229485] [2024-06-28 03:52:34,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:52:34,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:52:34,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:52:34,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:52:34,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:52:34,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:52:34,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 287 transitions, 3347 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:52:34,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:52:34,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:52:34,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:52:37,125 INFO L124 PetriNetUnfolderBase]: 3225/4801 cut-off events. [2024-06-28 03:52:37,125 INFO L125 PetriNetUnfolderBase]: For 80948/80950 co-relation queries the response was YES. [2024-06-28 03:52:37,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30499 conditions, 4801 events. 3225/4801 cut-off events. For 80948/80950 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 24619 event pairs, 657 based on Foata normal form. 12/4813 useless extension candidates. Maximal degree in co-relation 30435. Up to 2855 conditions per place. [2024-06-28 03:52:37,158 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 170 selfloop transitions, 216 changer transitions 0/390 dead transitions. [2024-06-28 03:52:37,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 390 transitions, 5118 flow [2024-06-28 03:52:37,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 03:52:37,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 03:52:37,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 233 transitions. [2024-06-28 03:52:37,160 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4623015873015873 [2024-06-28 03:52:37,160 INFO L175 Difference]: Start difference. First operand has 146 places, 287 transitions, 3347 flow. Second operand 12 states and 233 transitions. [2024-06-28 03:52:37,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 390 transitions, 5118 flow [2024-06-28 03:52:37,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 390 transitions, 4992 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-06-28 03:52:37,267 INFO L231 Difference]: Finished difference. Result has 157 places, 313 transitions, 4211 flow [2024-06-28 03:52:37,267 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3221, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=193, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4211, PETRI_PLACES=157, PETRI_TRANSITIONS=313} [2024-06-28 03:52:37,267 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 114 predicate places. [2024-06-28 03:52:37,267 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 313 transitions, 4211 flow [2024-06-28 03:52:37,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:52:37,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:52:37,268 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:52:37,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-28 03:52:37,268 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:52:37,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:52:37,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1192499283, now seen corresponding path program 4 times [2024-06-28 03:52:37,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:52:37,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105429456] [2024-06-28 03:52:37,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:52:37,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:52:37,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:52:39,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:52:39,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:52:39,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105429456] [2024-06-28 03:52:39,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105429456] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:52:39,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:52:39,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:52:39,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400997555] [2024-06-28 03:52:39,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:52:39,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:52:39,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:52:39,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:52:39,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:52:39,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:52:39,334 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 313 transitions, 4211 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:52:39,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:52:39,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:52:39,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:52:41,932 INFO L124 PetriNetUnfolderBase]: 3301/4907 cut-off events. [2024-06-28 03:52:41,932 INFO L125 PetriNetUnfolderBase]: For 97850/97852 co-relation queries the response was YES. [2024-06-28 03:52:41,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34483 conditions, 4907 events. 3301/4907 cut-off events. For 97850/97852 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 25147 event pairs, 724 based on Foata normal form. 12/4919 useless extension candidates. Maximal degree in co-relation 34413. Up to 2910 conditions per place. [2024-06-28 03:52:41,980 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 184 selfloop transitions, 218 changer transitions 0/406 dead transitions. [2024-06-28 03:52:41,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 406 transitions, 5874 flow [2024-06-28 03:52:41,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-28 03:52:41,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-28 03:52:41,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 254 transitions. [2024-06-28 03:52:41,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4652014652014652 [2024-06-28 03:52:41,982 INFO L175 Difference]: Start difference. First operand has 157 places, 313 transitions, 4211 flow. Second operand 13 states and 254 transitions. [2024-06-28 03:52:41,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 406 transitions, 5874 flow [2024-06-28 03:52:42,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 406 transitions, 5628 flow, removed 59 selfloop flow, removed 5 redundant places. [2024-06-28 03:52:42,158 INFO L231 Difference]: Finished difference. Result has 166 places, 321 transitions, 4569 flow [2024-06-28 03:52:42,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3979, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=210, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4569, PETRI_PLACES=166, PETRI_TRANSITIONS=321} [2024-06-28 03:52:42,159 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 123 predicate places. [2024-06-28 03:52:42,159 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 321 transitions, 4569 flow [2024-06-28 03:52:42,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:52:42,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:52:42,159 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:52:42,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-28 03:52:42,160 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:52:42,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:52:42,160 INFO L85 PathProgramCache]: Analyzing trace with hash 2100069249, now seen corresponding path program 5 times [2024-06-28 03:52:42,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:52:42,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194705608] [2024-06-28 03:52:42,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:52:42,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:52:42,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:52:45,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:52:45,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:52:45,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194705608] [2024-06-28 03:52:45,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194705608] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:52:45,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:52:45,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:52:45,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443425904] [2024-06-28 03:52:45,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:52:45,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:52:45,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:52:45,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:52:45,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:52:45,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:52:45,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 321 transitions, 4569 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:52:45,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:52:45,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:52:45,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:52:47,106 INFO L124 PetriNetUnfolderBase]: 3307/4934 cut-off events. [2024-06-28 03:52:47,106 INFO L125 PetriNetUnfolderBase]: For 104696/104704 co-relation queries the response was YES. [2024-06-28 03:52:47,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35677 conditions, 4934 events. 3307/4934 cut-off events. For 104696/104704 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 25552 event pairs, 910 based on Foata normal form. 20/4954 useless extension candidates. Maximal degree in co-relation 35604. Up to 4127 conditions per place. [2024-06-28 03:52:47,148 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 252 selfloop transitions, 121 changer transitions 0/377 dead transitions. [2024-06-28 03:52:47,148 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 377 transitions, 5796 flow [2024-06-28 03:52:47,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:52:47,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:52:47,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 177 transitions. [2024-06-28 03:52:47,149 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42142857142857143 [2024-06-28 03:52:47,149 INFO L175 Difference]: Start difference. First operand has 166 places, 321 transitions, 4569 flow. Second operand 10 states and 177 transitions. [2024-06-28 03:52:47,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 377 transitions, 5796 flow [2024-06-28 03:52:47,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 377 transitions, 5340 flow, removed 44 selfloop flow, removed 9 redundant places. [2024-06-28 03:52:47,321 INFO L231 Difference]: Finished difference. Result has 168 places, 328 transitions, 4596 flow [2024-06-28 03:52:47,321 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4127, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4596, PETRI_PLACES=168, PETRI_TRANSITIONS=328} [2024-06-28 03:52:47,322 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 125 predicate places. [2024-06-28 03:52:47,322 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 328 transitions, 4596 flow [2024-06-28 03:52:47,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:52:47,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:52:47,322 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:52:47,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-28 03:52:47,322 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:52:47,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:52:47,323 INFO L85 PathProgramCache]: Analyzing trace with hash -19655855, now seen corresponding path program 6 times [2024-06-28 03:52:47,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:52:47,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365819565] [2024-06-28 03:52:47,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:52:47,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:52:47,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:52:50,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:52:50,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:52:50,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365819565] [2024-06-28 03:52:50,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365819565] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:52:50,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:52:50,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:52:50,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619891078] [2024-06-28 03:52:50,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:52:50,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:52:50,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:52:50,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:52:50,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:52:50,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:52:50,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 328 transitions, 4596 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:52:50,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:52:50,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:52:50,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:52:52,245 INFO L124 PetriNetUnfolderBase]: 3679/5491 cut-off events. [2024-06-28 03:52:52,246 INFO L125 PetriNetUnfolderBase]: For 125215/125217 co-relation queries the response was YES. [2024-06-28 03:52:52,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39960 conditions, 5491 events. 3679/5491 cut-off events. For 125215/125217 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 28869 event pairs, 647 based on Foata normal form. 20/5511 useless extension candidates. Maximal degree in co-relation 39885. Up to 3199 conditions per place. [2024-06-28 03:52:52,291 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 152 selfloop transitions, 257 changer transitions 0/413 dead transitions. [2024-06-28 03:52:52,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 413 transitions, 6388 flow [2024-06-28 03:52:52,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:52:52,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:52:52,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 192 transitions. [2024-06-28 03:52:52,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45714285714285713 [2024-06-28 03:52:52,293 INFO L175 Difference]: Start difference. First operand has 168 places, 328 transitions, 4596 flow. Second operand 10 states and 192 transitions. [2024-06-28 03:52:52,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 413 transitions, 6388 flow [2024-06-28 03:52:52,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 413 transitions, 6172 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-28 03:52:52,503 INFO L231 Difference]: Finished difference. Result has 173 places, 353 transitions, 5490 flow [2024-06-28 03:52:52,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4380, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=232, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5490, PETRI_PLACES=173, PETRI_TRANSITIONS=353} [2024-06-28 03:52:52,504 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 130 predicate places. [2024-06-28 03:52:52,504 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 353 transitions, 5490 flow [2024-06-28 03:52:52,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:52:52,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:52:52,511 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:52:52,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-28 03:52:52,512 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:52:52,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:52:52,512 INFO L85 PathProgramCache]: Analyzing trace with hash 236588553, now seen corresponding path program 7 times [2024-06-28 03:52:52,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:52:52,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488438678] [2024-06-28 03:52:52,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:52:52,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:52:52,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:52:55,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:52:55,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:52:55,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488438678] [2024-06-28 03:52:55,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488438678] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:52:55,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:52:55,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:52:55,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359688724] [2024-06-28 03:52:55,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:52:55,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:52:55,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:52:55,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:52:55,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:52:55,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:52:55,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 353 transitions, 5490 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:52:55,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:52:55,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:52:55,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:52:57,435 INFO L124 PetriNetUnfolderBase]: 3835/5709 cut-off events. [2024-06-28 03:52:57,435 INFO L125 PetriNetUnfolderBase]: For 147936/147938 co-relation queries the response was YES. [2024-06-28 03:52:57,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44544 conditions, 5709 events. 3835/5709 cut-off events. For 147936/147938 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 30081 event pairs, 800 based on Foata normal form. 20/5729 useless extension candidates. Maximal degree in co-relation 44466. Up to 3312 conditions per place. [2024-06-28 03:52:57,481 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 167 selfloop transitions, 264 changer transitions 0/435 dead transitions. [2024-06-28 03:52:57,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 435 transitions, 7202 flow [2024-06-28 03:52:57,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 03:52:57,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 03:52:57,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 213 transitions. [2024-06-28 03:52:57,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.461038961038961 [2024-06-28 03:52:57,483 INFO L175 Difference]: Start difference. First operand has 173 places, 353 transitions, 5490 flow. Second operand 11 states and 213 transitions. [2024-06-28 03:52:57,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 435 transitions, 7202 flow [2024-06-28 03:52:57,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 435 transitions, 6767 flow, removed 75 selfloop flow, removed 5 redundant places. [2024-06-28 03:52:57,790 INFO L231 Difference]: Finished difference. Result has 180 places, 367 transitions, 5915 flow [2024-06-28 03:52:57,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5089, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=250, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5915, PETRI_PLACES=180, PETRI_TRANSITIONS=367} [2024-06-28 03:52:57,791 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 137 predicate places. [2024-06-28 03:52:57,791 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 367 transitions, 5915 flow [2024-06-28 03:52:57,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:52:57,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:52:57,792 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:52:57,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-28 03:52:57,792 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:52:57,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:52:57,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1520906125, now seen corresponding path program 8 times [2024-06-28 03:52:57,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:52:57,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273357126] [2024-06-28 03:52:57,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:52:57,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:52:57,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:53:00,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:53:00,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:53:00,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273357126] [2024-06-28 03:53:00,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273357126] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:53:00,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:53:00,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:53:00,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545669260] [2024-06-28 03:53:00,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:53:00,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:53:00,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:53:00,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:53:00,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:53:00,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:53:00,490 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 367 transitions, 5915 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:53:00,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:53:00,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:53:00,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:53:02,330 INFO L124 PetriNetUnfolderBase]: 4019/6000 cut-off events. [2024-06-28 03:53:02,330 INFO L125 PetriNetUnfolderBase]: For 162727/162731 co-relation queries the response was YES. [2024-06-28 03:53:02,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46704 conditions, 6000 events. 4019/6000 cut-off events. For 162727/162731 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 32013 event pairs, 832 based on Foata normal form. 19/6018 useless extension candidates. Maximal degree in co-relation 46624. Up to 4894 conditions per place. [2024-06-28 03:53:02,387 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 278 selfloop transitions, 146 changer transitions 0/428 dead transitions. [2024-06-28 03:53:02,387 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 428 transitions, 7467 flow [2024-06-28 03:53:02,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:53:02,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:53:02,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-28 03:53:02,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-28 03:53:02,389 INFO L175 Difference]: Start difference. First operand has 180 places, 367 transitions, 5915 flow. Second operand 9 states and 165 transitions. [2024-06-28 03:53:02,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 428 transitions, 7467 flow [2024-06-28 03:53:02,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 428 transitions, 6961 flow, removed 61 selfloop flow, removed 7 redundant places. [2024-06-28 03:53:02,737 INFO L231 Difference]: Finished difference. Result has 183 places, 384 transitions, 6077 flow [2024-06-28 03:53:02,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5437, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6077, PETRI_PLACES=183, PETRI_TRANSITIONS=384} [2024-06-28 03:53:02,738 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 140 predicate places. [2024-06-28 03:53:02,739 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 384 transitions, 6077 flow [2024-06-28 03:53:02,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:53:02,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:53:02,739 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:53:02,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-28 03:53:02,740 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:53:02,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:53:02,740 INFO L85 PathProgramCache]: Analyzing trace with hash 1237777065, now seen corresponding path program 9 times [2024-06-28 03:53:02,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:53:02,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024188103] [2024-06-28 03:53:02,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:53:02,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:53:02,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:53:05,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:53:05,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:53:05,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024188103] [2024-06-28 03:53:05,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024188103] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:53:05,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:53:05,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:53:05,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299813739] [2024-06-28 03:53:05,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:53:05,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:53:05,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:53:05,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:53:05,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:53:05,296 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:53:05,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 384 transitions, 6077 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:53:05,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:53:05,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:53:05,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:53:07,514 INFO L124 PetriNetUnfolderBase]: 4009/5985 cut-off events. [2024-06-28 03:53:07,514 INFO L125 PetriNetUnfolderBase]: For 162475/162479 co-relation queries the response was YES. [2024-06-28 03:53:07,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45629 conditions, 5985 events. 4009/5985 cut-off events. For 162475/162479 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 31667 event pairs, 893 based on Foata normal form. 5/5990 useless extension candidates. Maximal degree in co-relation 45547. Up to 5003 conditions per place. [2024-06-28 03:53:07,571 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 349 selfloop transitions, 133 changer transitions 0/486 dead transitions. [2024-06-28 03:53:07,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 486 transitions, 8426 flow [2024-06-28 03:53:07,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:53:07,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:53:07,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-28 03:53:07,573 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-28 03:53:07,573 INFO L175 Difference]: Start difference. First operand has 183 places, 384 transitions, 6077 flow. Second operand 8 states and 141 transitions. [2024-06-28 03:53:07,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 486 transitions, 8426 flow [2024-06-28 03:53:07,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 486 transitions, 7967 flow, removed 109 selfloop flow, removed 5 redundant places. [2024-06-28 03:53:07,894 INFO L231 Difference]: Finished difference. Result has 189 places, 452 transitions, 7319 flow [2024-06-28 03:53:07,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5722, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7319, PETRI_PLACES=189, PETRI_TRANSITIONS=452} [2024-06-28 03:53:07,895 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 146 predicate places. [2024-06-28 03:53:07,895 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 452 transitions, 7319 flow [2024-06-28 03:53:07,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:53:07,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:53:07,895 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:53:07,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-28 03:53:07,896 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:53:07,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:53:07,896 INFO L85 PathProgramCache]: Analyzing trace with hash -995069153, now seen corresponding path program 10 times [2024-06-28 03:53:07,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:53:07,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073712902] [2024-06-28 03:53:07,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:53:07,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:53:07,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:53:10,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:53:10,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:53:10,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073712902] [2024-06-28 03:53:10,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073712902] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:53:10,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:53:10,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:53:10,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740978445] [2024-06-28 03:53:10,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:53:10,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:53:10,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:53:10,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:53:10,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:53:10,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:53:10,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 452 transitions, 7319 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:53:10,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:53:10,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:53:10,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:53:12,363 INFO L124 PetriNetUnfolderBase]: 3973/5941 cut-off events. [2024-06-28 03:53:12,364 INFO L125 PetriNetUnfolderBase]: For 165451/165455 co-relation queries the response was YES. [2024-06-28 03:53:12,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46062 conditions, 5941 events. 3973/5941 cut-off events. For 165451/165455 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 31589 event pairs, 885 based on Foata normal form. 19/5960 useless extension candidates. Maximal degree in co-relation 45975. Up to 4861 conditions per place. [2024-06-28 03:53:12,428 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 304 selfloop transitions, 193 changer transitions 0/501 dead transitions. [2024-06-28 03:53:12,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 501 transitions, 8639 flow [2024-06-28 03:53:12,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:53:12,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:53:12,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 184 transitions. [2024-06-28 03:53:12,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4380952380952381 [2024-06-28 03:53:12,429 INFO L175 Difference]: Start difference. First operand has 189 places, 452 transitions, 7319 flow. Second operand 10 states and 184 transitions. [2024-06-28 03:53:12,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 501 transitions, 8639 flow [2024-06-28 03:53:12,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 501 transitions, 8465 flow, removed 84 selfloop flow, removed 2 redundant places. [2024-06-28 03:53:12,797 INFO L231 Difference]: Finished difference. Result has 197 places, 452 transitions, 7565 flow [2024-06-28 03:53:12,797 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7157, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=193, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7565, PETRI_PLACES=197, PETRI_TRANSITIONS=452} [2024-06-28 03:53:12,797 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 154 predicate places. [2024-06-28 03:53:12,797 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 452 transitions, 7565 flow [2024-06-28 03:53:12,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:53:12,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:53:12,798 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:53:12,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-28 03:53:12,798 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:53:12,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:53:12,799 INFO L85 PathProgramCache]: Analyzing trace with hash 1026274387, now seen corresponding path program 1 times [2024-06-28 03:53:12,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:53:12,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545210689] [2024-06-28 03:53:12,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:53:12,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:53:12,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:53:14,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:53:14,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:53:14,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545210689] [2024-06-28 03:53:14,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545210689] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:53:14,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:53:14,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:53:14,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7167260] [2024-06-28 03:53:14,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:53:14,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:53:14,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:53:14,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:53:14,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:53:14,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:53:14,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 452 transitions, 7565 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:53:14,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:53:14,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:53:14,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:53:17,606 INFO L124 PetriNetUnfolderBase]: 4904/7460 cut-off events. [2024-06-28 03:53:17,606 INFO L125 PetriNetUnfolderBase]: For 250527/250535 co-relation queries the response was YES. [2024-06-28 03:53:17,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57073 conditions, 7460 events. 4904/7460 cut-off events. For 250527/250535 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 42739 event pairs, 1360 based on Foata normal form. 92/7552 useless extension candidates. Maximal degree in co-relation 56983. Up to 4879 conditions per place. [2024-06-28 03:53:17,678 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 402 selfloop transitions, 142 changer transitions 1/549 dead transitions. [2024-06-28 03:53:17,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 549 transitions, 9619 flow [2024-06-28 03:53:17,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-28 03:53:17,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-28 03:53:17,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 261 transitions. [2024-06-28 03:53:17,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44387755102040816 [2024-06-28 03:53:17,680 INFO L175 Difference]: Start difference. First operand has 197 places, 452 transitions, 7565 flow. Second operand 14 states and 261 transitions. [2024-06-28 03:53:17,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 549 transitions, 9619 flow [2024-06-28 03:53:18,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 549 transitions, 9165 flow, removed 29 selfloop flow, removed 9 redundant places. [2024-06-28 03:53:18,138 INFO L231 Difference]: Finished difference. Result has 204 places, 456 transitions, 7536 flow [2024-06-28 03:53:18,139 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7121, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=7536, PETRI_PLACES=204, PETRI_TRANSITIONS=456} [2024-06-28 03:53:18,139 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 161 predicate places. [2024-06-28 03:53:18,139 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 456 transitions, 7536 flow [2024-06-28 03:53:18,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:53:18,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:53:18,140 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:53:18,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-28 03:53:18,140 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:53:18,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:53:18,141 INFO L85 PathProgramCache]: Analyzing trace with hash -1071753663, now seen corresponding path program 2 times [2024-06-28 03:53:18,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:53:18,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991918738] [2024-06-28 03:53:18,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:53:18,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:53:18,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:53:20,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:53:20,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:53:20,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991918738] [2024-06-28 03:53:20,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991918738] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:53:20,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:53:20,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:53:20,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096426225] [2024-06-28 03:53:20,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:53:20,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:53:20,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:53:20,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:53:20,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:53:20,296 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:53:20,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 456 transitions, 7536 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:53:20,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:53:20,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:53:20,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:53:22,871 INFO L124 PetriNetUnfolderBase]: 4859/7411 cut-off events. [2024-06-28 03:53:22,871 INFO L125 PetriNetUnfolderBase]: For 251717/251725 co-relation queries the response was YES. [2024-06-28 03:53:22,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56863 conditions, 7411 events. 4859/7411 cut-off events. For 251717/251725 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 42695 event pairs, 1820 based on Foata normal form. 28/7439 useless extension candidates. Maximal degree in co-relation 56771. Up to 6841 conditions per place. [2024-06-28 03:53:23,079 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 410 selfloop transitions, 111 changer transitions 0/525 dead transitions. [2024-06-28 03:53:23,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 525 transitions, 9091 flow [2024-06-28 03:53:23,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-28 03:53:23,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-28 03:53:23,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 219 transitions. [2024-06-28 03:53:23,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4010989010989011 [2024-06-28 03:53:23,082 INFO L175 Difference]: Start difference. First operand has 204 places, 456 transitions, 7536 flow. Second operand 13 states and 219 transitions. [2024-06-28 03:53:23,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 525 transitions, 9091 flow [2024-06-28 03:53:23,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 525 transitions, 8907 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-28 03:53:23,556 INFO L231 Difference]: Finished difference. Result has 212 places, 468 transitions, 7924 flow [2024-06-28 03:53:23,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7364, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=456, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=7924, PETRI_PLACES=212, PETRI_TRANSITIONS=468} [2024-06-28 03:53:23,557 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 169 predicate places. [2024-06-28 03:53:23,557 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 468 transitions, 7924 flow [2024-06-28 03:53:23,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:53:23,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:53:23,558 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:53:23,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-28 03:53:23,558 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:53:23,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:53:23,558 INFO L85 PathProgramCache]: Analyzing trace with hash -1786021981, now seen corresponding path program 3 times [2024-06-28 03:53:23,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:53:23,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40202520] [2024-06-28 03:53:23,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:53:23,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:53:23,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:53:25,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:53:25,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:53:25,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40202520] [2024-06-28 03:53:25,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40202520] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:53:25,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:53:25,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:53:25,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441208514] [2024-06-28 03:53:25,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:53:25,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:53:25,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:53:25,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:53:25,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:53:25,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:53:25,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 468 transitions, 7924 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:53:25,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:53:25,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:53:25,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:53:27,867 INFO L124 PetriNetUnfolderBase]: 5025/7681 cut-off events. [2024-06-28 03:53:27,867 INFO L125 PetriNetUnfolderBase]: For 273154/273162 co-relation queries the response was YES. [2024-06-28 03:53:27,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60252 conditions, 7681 events. 5025/7681 cut-off events. For 273154/273162 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 44442 event pairs, 1468 based on Foata normal form. 12/7693 useless extension candidates. Maximal degree in co-relation 60155. Up to 6848 conditions per place. [2024-06-28 03:53:27,949 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 422 selfloop transitions, 113 changer transitions 0/539 dead transitions. [2024-06-28 03:53:27,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 539 transitions, 9789 flow [2024-06-28 03:53:27,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:53:27,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:53:27,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 180 transitions. [2024-06-28 03:53:27,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-28 03:53:27,951 INFO L175 Difference]: Start difference. First operand has 212 places, 468 transitions, 7924 flow. Second operand 10 states and 180 transitions. [2024-06-28 03:53:27,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 539 transitions, 9789 flow [2024-06-28 03:53:28,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 539 transitions, 9567 flow, removed 38 selfloop flow, removed 7 redundant places. [2024-06-28 03:53:28,555 INFO L231 Difference]: Finished difference. Result has 217 places, 487 transitions, 8415 flow [2024-06-28 03:53:28,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7727, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8415, PETRI_PLACES=217, PETRI_TRANSITIONS=487} [2024-06-28 03:53:28,555 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 174 predicate places. [2024-06-28 03:53:28,555 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 487 transitions, 8415 flow [2024-06-28 03:53:28,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:53:28,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:53:28,556 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:53:28,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-28 03:53:28,556 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:53:28,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:53:28,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1960138331, now seen corresponding path program 4 times [2024-06-28 03:53:28,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:53:28,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243430234] [2024-06-28 03:53:28,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:53:28,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:53:28,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:53:31,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:53:31,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:53:31,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243430234] [2024-06-28 03:53:31,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243430234] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:53:31,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:53:31,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:53:31,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997287203] [2024-06-28 03:53:31,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:53:31,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:53:31,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:53:31,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:53:31,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:53:31,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:53:31,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 487 transitions, 8415 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:53:31,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:53:31,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:53:31,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:53:33,767 INFO L124 PetriNetUnfolderBase]: 5270/8060 cut-off events. [2024-06-28 03:53:33,767 INFO L125 PetriNetUnfolderBase]: For 303907/303915 co-relation queries the response was YES. [2024-06-28 03:53:33,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64908 conditions, 8060 events. 5270/8060 cut-off events. For 303907/303915 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 47227 event pairs, 1548 based on Foata normal form. 16/8076 useless extension candidates. Maximal degree in co-relation 64808. Up to 7400 conditions per place. [2024-06-28 03:53:33,853 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 460 selfloop transitions, 94 changer transitions 0/558 dead transitions. [2024-06-28 03:53:33,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 558 transitions, 10361 flow [2024-06-28 03:53:33,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:53:33,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:53:33,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 182 transitions. [2024-06-28 03:53:33,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-06-28 03:53:33,854 INFO L175 Difference]: Start difference. First operand has 217 places, 487 transitions, 8415 flow. Second operand 10 states and 182 transitions. [2024-06-28 03:53:33,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 558 transitions, 10361 flow [2024-06-28 03:53:34,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 558 transitions, 9854 flow, removed 196 selfloop flow, removed 6 redundant places. [2024-06-28 03:53:34,673 INFO L231 Difference]: Finished difference. Result has 222 places, 507 transitions, 8696 flow [2024-06-28 03:53:34,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8126, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=487, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8696, PETRI_PLACES=222, PETRI_TRANSITIONS=507} [2024-06-28 03:53:34,674 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 179 predicate places. [2024-06-28 03:53:34,675 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 507 transitions, 8696 flow [2024-06-28 03:53:34,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:53:34,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:53:34,675 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:53:34,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-28 03:53:34,675 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:53:34,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:53:34,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1805318247, now seen corresponding path program 5 times [2024-06-28 03:53:34,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:53:34,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439469929] [2024-06-28 03:53:34,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:53:34,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:53:34,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:53:38,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:53:38,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:53:38,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439469929] [2024-06-28 03:53:38,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439469929] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:53:38,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:53:38,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:53:38,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574415387] [2024-06-28 03:53:38,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:53:38,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:53:38,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:53:38,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:53:38,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:53:39,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:53:39,014 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 507 transitions, 8696 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:53:39,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:53:39,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:53:39,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:53:41,373 INFO L124 PetriNetUnfolderBase]: 5247/8027 cut-off events. [2024-06-28 03:53:41,374 INFO L125 PetriNetUnfolderBase]: For 296005/296013 co-relation queries the response was YES. [2024-06-28 03:53:41,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63287 conditions, 8027 events. 5247/8027 cut-off events. For 296005/296013 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 46981 event pairs, 1587 based on Foata normal form. 18/8045 useless extension candidates. Maximal degree in co-relation 63185. Up to 7544 conditions per place. [2024-06-28 03:53:41,465 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 465 selfloop transitions, 82 changer transitions 0/551 dead transitions. [2024-06-28 03:53:41,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 551 transitions, 10007 flow [2024-06-28 03:53:41,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:53:41,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:53:41,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-28 03:53:41,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-28 03:53:41,469 INFO L175 Difference]: Start difference. First operand has 222 places, 507 transitions, 8696 flow. Second operand 9 states and 161 transitions. [2024-06-28 03:53:41,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 551 transitions, 10007 flow [2024-06-28 03:53:42,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 551 transitions, 9709 flow, removed 104 selfloop flow, removed 6 redundant places. [2024-06-28 03:53:42,349 INFO L231 Difference]: Finished difference. Result has 225 places, 510 transitions, 8652 flow [2024-06-28 03:53:42,349 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8430, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=507, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=425, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8652, PETRI_PLACES=225, PETRI_TRANSITIONS=510} [2024-06-28 03:53:42,350 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 182 predicate places. [2024-06-28 03:53:42,350 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 510 transitions, 8652 flow [2024-06-28 03:53:42,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:53:42,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:53:42,351 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:53:42,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-28 03:53:42,351 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:53:42,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:53:42,351 INFO L85 PathProgramCache]: Analyzing trace with hash -830139975, now seen corresponding path program 6 times [2024-06-28 03:53:42,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:53:42,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340889099] [2024-06-28 03:53:42,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:53:42,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:53:42,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:53:44,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:53:44,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:53:44,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340889099] [2024-06-28 03:53:44,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340889099] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:53:44,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:53:44,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:53:44,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601476607] [2024-06-28 03:53:44,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:53:44,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:53:44,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:53:44,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:53:44,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:53:44,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:53:44,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 510 transitions, 8652 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:53:44,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:53:44,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:53:44,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:53:46,966 INFO L124 PetriNetUnfolderBase]: 5275/8063 cut-off events. [2024-06-28 03:53:46,966 INFO L125 PetriNetUnfolderBase]: For 304403/304405 co-relation queries the response was YES. [2024-06-28 03:53:47,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63589 conditions, 8063 events. 5275/8063 cut-off events. For 304403/304405 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 47266 event pairs, 1487 based on Foata normal form. 8/8071 useless extension candidates. Maximal degree in co-relation 63485. Up to 7395 conditions per place. [2024-06-28 03:53:47,058 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 399 selfloop transitions, 154 changer transitions 0/557 dead transitions. [2024-06-28 03:53:47,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 557 transitions, 10085 flow [2024-06-28 03:53:47,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:53:47,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:53:47,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-28 03:53:47,060 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-28 03:53:47,060 INFO L175 Difference]: Start difference. First operand has 225 places, 510 transitions, 8652 flow. Second operand 9 states and 163 transitions. [2024-06-28 03:53:47,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 557 transitions, 10085 flow [2024-06-28 03:53:47,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 557 transitions, 9960 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-28 03:53:47,775 INFO L231 Difference]: Finished difference. Result has 228 places, 512 transitions, 8921 flow [2024-06-28 03:53:47,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8527, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=510, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8921, PETRI_PLACES=228, PETRI_TRANSITIONS=512} [2024-06-28 03:53:47,776 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 185 predicate places. [2024-06-28 03:53:47,776 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 512 transitions, 8921 flow [2024-06-28 03:53:47,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:53:47,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:53:47,777 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:53:47,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-28 03:53:47,777 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:53:47,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:53:47,777 INFO L85 PathProgramCache]: Analyzing trace with hash -829955277, now seen corresponding path program 1 times [2024-06-28 03:53:47,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:53:47,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982744762] [2024-06-28 03:53:47,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:53:47,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:53:47,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:53:50,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:53:50,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:53:50,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982744762] [2024-06-28 03:53:50,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982744762] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:53:50,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:53:50,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:53:50,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810786964] [2024-06-28 03:53:50,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:53:50,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:53:50,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:53:50,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:53:50,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:53:50,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:53:50,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 512 transitions, 8921 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:53:50,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:53:50,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:53:50,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:53:53,709 INFO L124 PetriNetUnfolderBase]: 5381/8184 cut-off events. [2024-06-28 03:53:53,709 INFO L125 PetriNetUnfolderBase]: For 338347/338357 co-relation queries the response was YES. [2024-06-28 03:53:53,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65278 conditions, 8184 events. 5381/8184 cut-off events. For 338347/338357 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 47919 event pairs, 1833 based on Foata normal form. 28/8212 useless extension candidates. Maximal degree in co-relation 65173. Up to 7442 conditions per place. [2024-06-28 03:53:53,961 INFO L140 encePairwiseOnDemand]: 26/42 looper letters, 499 selfloop transitions, 102 changer transitions 0/605 dead transitions. [2024-06-28 03:53:53,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 605 transitions, 11042 flow [2024-06-28 03:53:53,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 03:53:53,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 03:53:53,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 223 transitions. [2024-06-28 03:53:53,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44246031746031744 [2024-06-28 03:53:53,963 INFO L175 Difference]: Start difference. First operand has 228 places, 512 transitions, 8921 flow. Second operand 12 states and 223 transitions. [2024-06-28 03:53:53,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 605 transitions, 11042 flow [2024-06-28 03:53:54,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 605 transitions, 10727 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-28 03:53:54,598 INFO L231 Difference]: Finished difference. Result has 236 places, 533 transitions, 9236 flow [2024-06-28 03:53:54,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8606, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=512, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=410, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=9236, PETRI_PLACES=236, PETRI_TRANSITIONS=533} [2024-06-28 03:53:54,598 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 193 predicate places. [2024-06-28 03:53:54,598 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 533 transitions, 9236 flow [2024-06-28 03:53:54,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:53:54,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:53:54,599 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:53:54,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-28 03:53:54,599 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:53:54,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:53:54,600 INFO L85 PathProgramCache]: Analyzing trace with hash 674777643, now seen corresponding path program 7 times [2024-06-28 03:53:54,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:53:54,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179975326] [2024-06-28 03:53:54,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:53:54,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:53:54,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:53:57,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:53:57,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:53:57,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179975326] [2024-06-28 03:53:57,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179975326] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:53:57,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:53:57,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:53:57,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143830475] [2024-06-28 03:53:57,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:53:57,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:53:57,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:53:57,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:53:57,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:53:57,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:53:57,461 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 533 transitions, 9236 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:53:57,461 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:53:57,461 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:53:57,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:54:00,158 INFO L124 PetriNetUnfolderBase]: 5444/8318 cut-off events. [2024-06-28 03:54:00,158 INFO L125 PetriNetUnfolderBase]: For 351773/351781 co-relation queries the response was YES. [2024-06-28 03:54:00,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68287 conditions, 8318 events. 5444/8318 cut-off events. For 351773/351781 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 49002 event pairs, 1444 based on Foata normal form. 18/8336 useless extension candidates. Maximal degree in co-relation 68179. Up to 7124 conditions per place. [2024-06-28 03:54:00,251 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 453 selfloop transitions, 129 changer transitions 0/586 dead transitions. [2024-06-28 03:54:00,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 586 transitions, 10987 flow [2024-06-28 03:54:00,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:54:00,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:54:00,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-28 03:54:00,253 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-28 03:54:00,253 INFO L175 Difference]: Start difference. First operand has 236 places, 533 transitions, 9236 flow. Second operand 9 states and 162 transitions. [2024-06-28 03:54:00,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 586 transitions, 10987 flow [2024-06-28 03:54:00,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 586 transitions, 10821 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-28 03:54:00,958 INFO L231 Difference]: Finished difference. Result has 240 places, 540 transitions, 9580 flow [2024-06-28 03:54:00,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9070, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=533, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=409, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9580, PETRI_PLACES=240, PETRI_TRANSITIONS=540} [2024-06-28 03:54:00,959 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 197 predicate places. [2024-06-28 03:54:00,959 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 540 transitions, 9580 flow [2024-06-28 03:54:00,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:54:00,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:54:00,959 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:54:00,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-28 03:54:00,959 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:54:00,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:54:00,960 INFO L85 PathProgramCache]: Analyzing trace with hash -724798331, now seen corresponding path program 8 times [2024-06-28 03:54:00,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:54:00,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969897361] [2024-06-28 03:54:00,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:54:00,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:54:00,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:54:03,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:54:03,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:54:03,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969897361] [2024-06-28 03:54:03,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969897361] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:54:03,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:54:03,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:54:03,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514225339] [2024-06-28 03:54:03,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:54:03,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:54:03,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:54:03,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:54:03,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:54:03,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:54:03,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 540 transitions, 9580 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:54:03,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:54:03,701 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:54:03,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:54:06,320 INFO L124 PetriNetUnfolderBase]: 5416/8278 cut-off events. [2024-06-28 03:54:06,320 INFO L125 PetriNetUnfolderBase]: For 363895/363903 co-relation queries the response was YES. [2024-06-28 03:54:06,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68288 conditions, 8278 events. 5416/8278 cut-off events. For 363895/363903 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 48832 event pairs, 1869 based on Foata normal form. 20/8298 useless extension candidates. Maximal degree in co-relation 68179. Up to 7606 conditions per place. [2024-06-28 03:54:06,418 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 465 selfloop transitions, 109 changer transitions 0/578 dead transitions. [2024-06-28 03:54:06,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 578 transitions, 10924 flow [2024-06-28 03:54:06,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:54:06,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:54:06,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-28 03:54:06,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-28 03:54:06,420 INFO L175 Difference]: Start difference. First operand has 240 places, 540 transitions, 9580 flow. Second operand 8 states and 143 transitions. [2024-06-28 03:54:06,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 578 transitions, 10924 flow [2024-06-28 03:54:07,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 578 transitions, 10480 flow, removed 159 selfloop flow, removed 6 redundant places. [2024-06-28 03:54:07,536 INFO L231 Difference]: Finished difference. Result has 242 places, 540 transitions, 9411 flow [2024-06-28 03:54:07,536 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9160, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=540, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9411, PETRI_PLACES=242, PETRI_TRANSITIONS=540} [2024-06-28 03:54:07,536 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 199 predicate places. [2024-06-28 03:54:07,537 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 540 transitions, 9411 flow [2024-06-28 03:54:07,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:54:07,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:54:07,537 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:54:07,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-28 03:54:07,537 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:54:07,538 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:54:07,538 INFO L85 PathProgramCache]: Analyzing trace with hash 792925773, now seen corresponding path program 9 times [2024-06-28 03:54:07,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:54:07,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100732102] [2024-06-28 03:54:07,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:54:07,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:54:07,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:54:10,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:54:10,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:54:10,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100732102] [2024-06-28 03:54:10,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100732102] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:54:10,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:54:10,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:54:10,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663032404] [2024-06-28 03:54:10,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:54:10,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:54:10,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:54:10,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:54:10,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:54:10,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:54:10,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 540 transitions, 9411 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:54:10,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:54:10,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:54:10,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:54:13,141 INFO L124 PetriNetUnfolderBase]: 5444/8304 cut-off events. [2024-06-28 03:54:13,141 INFO L125 PetriNetUnfolderBase]: For 339613/339615 co-relation queries the response was YES. [2024-06-28 03:54:13,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67705 conditions, 8304 events. 5444/8304 cut-off events. For 339613/339615 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 48818 event pairs, 1508 based on Foata normal form. 8/8312 useless extension candidates. Maximal degree in co-relation 67595. Up to 7624 conditions per place. [2024-06-28 03:54:13,254 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 418 selfloop transitions, 157 changer transitions 0/579 dead transitions. [2024-06-28 03:54:13,254 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 579 transitions, 10862 flow [2024-06-28 03:54:13,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:54:13,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:54:13,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-28 03:54:13,255 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-28 03:54:13,255 INFO L175 Difference]: Start difference. First operand has 242 places, 540 transitions, 9411 flow. Second operand 8 states and 143 transitions. [2024-06-28 03:54:13,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 579 transitions, 10862 flow [2024-06-28 03:54:13,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 579 transitions, 10599 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-28 03:54:14,001 INFO L231 Difference]: Finished difference. Result has 243 places, 542 transitions, 9564 flow [2024-06-28 03:54:14,002 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9148, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=540, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=383, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9564, PETRI_PLACES=243, PETRI_TRANSITIONS=542} [2024-06-28 03:54:14,002 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 200 predicate places. [2024-06-28 03:54:14,002 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 542 transitions, 9564 flow [2024-06-28 03:54:14,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:54:14,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:54:14,002 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:54:14,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-28 03:54:14,003 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:54:14,003 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:54:14,003 INFO L85 PathProgramCache]: Analyzing trace with hash 1629388453, now seen corresponding path program 2 times [2024-06-28 03:54:14,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:54:14,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820417301] [2024-06-28 03:54:14,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:54:14,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:54:14,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:54:17,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:54:17,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:54:17,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820417301] [2024-06-28 03:54:17,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820417301] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:54:17,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:54:17,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:54:17,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903426059] [2024-06-28 03:54:17,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:54:17,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:54:17,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:54:17,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:54:17,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:54:17,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:54:17,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 542 transitions, 9564 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:54:17,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:54:17,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:54:17,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:54:19,803 INFO L124 PetriNetUnfolderBase]: 5532/8422 cut-off events. [2024-06-28 03:54:19,804 INFO L125 PetriNetUnfolderBase]: For 376712/376722 co-relation queries the response was YES. [2024-06-28 03:54:19,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69014 conditions, 8422 events. 5532/8422 cut-off events. For 376712/376722 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 49669 event pairs, 1847 based on Foata normal form. 28/8450 useless extension candidates. Maximal degree in co-relation 68903. Up to 7433 conditions per place. [2024-06-28 03:54:19,909 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 469 selfloop transitions, 130 changer transitions 0/603 dead transitions. [2024-06-28 03:54:19,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 603 transitions, 11278 flow [2024-06-28 03:54:19,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:54:19,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:54:19,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 186 transitions. [2024-06-28 03:54:19,910 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44285714285714284 [2024-06-28 03:54:19,910 INFO L175 Difference]: Start difference. First operand has 243 places, 542 transitions, 9564 flow. Second operand 10 states and 186 transitions. [2024-06-28 03:54:19,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 603 transitions, 11278 flow [2024-06-28 03:54:20,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 603 transitions, 10904 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-28 03:54:20,692 INFO L231 Difference]: Finished difference. Result has 247 places, 545 transitions, 9572 flow [2024-06-28 03:54:20,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9196, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=542, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=412, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9572, PETRI_PLACES=247, PETRI_TRANSITIONS=545} [2024-06-28 03:54:20,693 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 204 predicate places. [2024-06-28 03:54:20,693 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 545 transitions, 9572 flow [2024-06-28 03:54:20,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:54:20,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:54:20,694 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:54:20,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-28 03:54:20,694 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:54:20,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:54:20,694 INFO L85 PathProgramCache]: Analyzing trace with hash -96726037, now seen corresponding path program 10 times [2024-06-28 03:54:20,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:54:20,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916762944] [2024-06-28 03:54:20,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:54:20,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:54:20,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:54:23,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:54:23,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:54:23,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916762944] [2024-06-28 03:54:23,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916762944] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:54:23,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:54:23,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:54:23,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123489805] [2024-06-28 03:54:23,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:54:23,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:54:23,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:54:23,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:54:23,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:54:23,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:54:23,531 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 545 transitions, 9572 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:54:23,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:54:23,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:54:23,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:54:26,398 INFO L124 PetriNetUnfolderBase]: 5519/8412 cut-off events. [2024-06-28 03:54:26,398 INFO L125 PetriNetUnfolderBase]: For 351026/351030 co-relation queries the response was YES. [2024-06-28 03:54:26,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68799 conditions, 8412 events. 5519/8412 cut-off events. For 351026/351030 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 49374 event pairs, 1506 based on Foata normal form. 7/8418 useless extension candidates. Maximal degree in co-relation 68687. Up to 7783 conditions per place. [2024-06-28 03:54:26,495 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 425 selfloop transitions, 150 changer transitions 0/579 dead transitions. [2024-06-28 03:54:26,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 579 transitions, 10991 flow [2024-06-28 03:54:26,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:54:26,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:54:26,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-28 03:54:26,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-28 03:54:26,497 INFO L175 Difference]: Start difference. First operand has 247 places, 545 transitions, 9572 flow. Second operand 8 states and 139 transitions. [2024-06-28 03:54:26,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 579 transitions, 10991 flow [2024-06-28 03:54:27,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 579 transitions, 10707 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-28 03:54:27,316 INFO L231 Difference]: Finished difference. Result has 248 places, 547 transitions, 9686 flow [2024-06-28 03:54:27,317 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9288, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=545, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9686, PETRI_PLACES=248, PETRI_TRANSITIONS=547} [2024-06-28 03:54:27,319 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 205 predicate places. [2024-06-28 03:54:27,319 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 547 transitions, 9686 flow [2024-06-28 03:54:27,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:54:27,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:54:27,319 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:54:27,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-28 03:54:27,319 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:54:27,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:54:27,320 INFO L85 PathProgramCache]: Analyzing trace with hash -289863717, now seen corresponding path program 3 times [2024-06-28 03:54:27,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:54:27,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460469102] [2024-06-28 03:54:27,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:54:27,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:54:27,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:54:30,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:54:30,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:54:30,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460469102] [2024-06-28 03:54:30,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460469102] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:54:30,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:54:30,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:54:30,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351115268] [2024-06-28 03:54:30,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:54:30,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:54:30,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:54:30,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:54:30,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:54:30,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:54:30,633 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 547 transitions, 9686 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:54:30,633 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:54:30,633 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:54:30,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:54:33,238 INFO L124 PetriNetUnfolderBase]: 5607/8577 cut-off events. [2024-06-28 03:54:33,238 INFO L125 PetriNetUnfolderBase]: For 383502/383516 co-relation queries the response was YES. [2024-06-28 03:54:33,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69786 conditions, 8577 events. 5607/8577 cut-off events. For 383502/383516 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 51030 event pairs, 1925 based on Foata normal form. 32/8609 useless extension candidates. Maximal degree in co-relation 69673. Up to 7938 conditions per place. [2024-06-28 03:54:33,349 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 509 selfloop transitions, 83 changer transitions 0/596 dead transitions. [2024-06-28 03:54:33,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 596 transitions, 11264 flow [2024-06-28 03:54:33,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:54:33,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:54:33,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-28 03:54:33,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-06-28 03:54:33,350 INFO L175 Difference]: Start difference. First operand has 248 places, 547 transitions, 9686 flow. Second operand 9 states and 160 transitions. [2024-06-28 03:54:33,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 596 transitions, 11264 flow [2024-06-28 03:54:34,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 596 transitions, 10908 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-28 03:54:34,154 INFO L231 Difference]: Finished difference. Result has 251 places, 550 transitions, 9614 flow [2024-06-28 03:54:34,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9330, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=464, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9614, PETRI_PLACES=251, PETRI_TRANSITIONS=550} [2024-06-28 03:54:34,155 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 208 predicate places. [2024-06-28 03:54:34,155 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 550 transitions, 9614 flow [2024-06-28 03:54:34,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:54:34,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:54:34,155 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:54:34,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-28 03:54:34,155 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:54:34,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:54:34,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1523951419, now seen corresponding path program 4 times [2024-06-28 03:54:34,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:54:34,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310433047] [2024-06-28 03:54:34,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:54:34,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:54:34,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:54:37,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:54:37,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:54:37,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310433047] [2024-06-28 03:54:37,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310433047] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:54:37,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:54:37,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:54:37,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793910097] [2024-06-28 03:54:37,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:54:37,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:54:37,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:54:37,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:54:37,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:54:37,378 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:54:37,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 550 transitions, 9614 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:54:37,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:54:37,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:54:37,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:54:40,048 INFO L124 PetriNetUnfolderBase]: 5627/8630 cut-off events. [2024-06-28 03:54:40,048 INFO L125 PetriNetUnfolderBase]: For 387060/387074 co-relation queries the response was YES. [2024-06-28 03:54:40,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70398 conditions, 8630 events. 5627/8630 cut-off events. For 387060/387074 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 51453 event pairs, 1898 based on Foata normal form. 18/8648 useless extension candidates. Maximal degree in co-relation 70284. Up to 8122 conditions per place. [2024-06-28 03:54:40,157 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 522 selfloop transitions, 58 changer transitions 0/584 dead transitions. [2024-06-28 03:54:40,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 584 transitions, 10964 flow [2024-06-28 03:54:40,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:54:40,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:54:40,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-28 03:54:40,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-28 03:54:40,159 INFO L175 Difference]: Start difference. First operand has 251 places, 550 transitions, 9614 flow. Second operand 8 states and 135 transitions. [2024-06-28 03:54:40,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 584 transitions, 10964 flow [2024-06-28 03:54:41,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 584 transitions, 10728 flow, removed 40 selfloop flow, removed 7 redundant places. [2024-06-28 03:54:41,129 INFO L231 Difference]: Finished difference. Result has 252 places, 552 transitions, 9553 flow [2024-06-28 03:54:41,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9378, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=550, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=492, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9553, PETRI_PLACES=252, PETRI_TRANSITIONS=552} [2024-06-28 03:54:41,130 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 209 predicate places. [2024-06-28 03:54:41,130 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 552 transitions, 9553 flow [2024-06-28 03:54:41,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:54:41,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:54:41,130 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:54:41,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-28 03:54:41,130 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:54:41,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:54:41,131 INFO L85 PathProgramCache]: Analyzing trace with hash -545718619, now seen corresponding path program 5 times [2024-06-28 03:54:41,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:54:41,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133728420] [2024-06-28 03:54:41,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:54:41,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:54:41,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:54:44,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:54:44,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:54:44,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133728420] [2024-06-28 03:54:44,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133728420] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:54:44,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:54:44,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:54:44,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890143788] [2024-06-28 03:54:44,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:54:44,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:54:44,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:54:44,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:54:44,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:54:44,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:54:44,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 552 transitions, 9553 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:54:44,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:54:44,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:54:44,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:54:47,021 INFO L124 PetriNetUnfolderBase]: 5619/8622 cut-off events. [2024-06-28 03:54:47,021 INFO L125 PetriNetUnfolderBase]: For 396727/396741 co-relation queries the response was YES. [2024-06-28 03:54:47,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70311 conditions, 8622 events. 5619/8622 cut-off events. For 396727/396741 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 51375 event pairs, 1866 based on Foata normal form. 18/8640 useless extension candidates. Maximal degree in co-relation 70196. Up to 7978 conditions per place. [2024-06-28 03:54:47,137 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 518 selfloop transitions, 67 changer transitions 0/589 dead transitions. [2024-06-28 03:54:47,138 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 589 transitions, 10943 flow [2024-06-28 03:54:47,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:54:47,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:54:47,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-28 03:54:47,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-28 03:54:47,139 INFO L175 Difference]: Start difference. First operand has 252 places, 552 transitions, 9553 flow. Second operand 8 states and 135 transitions. [2024-06-28 03:54:47,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 589 transitions, 10943 flow [2024-06-28 03:54:48,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 589 transitions, 10790 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-28 03:54:48,043 INFO L231 Difference]: Finished difference. Result has 255 places, 557 transitions, 9650 flow [2024-06-28 03:54:48,044 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9400, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=552, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=485, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9650, PETRI_PLACES=255, PETRI_TRANSITIONS=557} [2024-06-28 03:54:48,044 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 212 predicate places. [2024-06-28 03:54:48,044 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 557 transitions, 9650 flow [2024-06-28 03:54:48,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:54:48,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:54:48,045 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:54:48,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-28 03:54:48,045 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:54:48,045 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:54:48,045 INFO L85 PathProgramCache]: Analyzing trace with hash -594709845, now seen corresponding path program 1 times [2024-06-28 03:54:48,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:54:48,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182194371] [2024-06-28 03:54:48,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:54:48,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:54:48,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:54:50,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:54:50,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:54:50,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182194371] [2024-06-28 03:54:50,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182194371] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:54:50,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:54:50,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 03:54:50,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878867402] [2024-06-28 03:54:50,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:54:50,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 03:54:50,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:54:50,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 03:54:50,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 03:54:50,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:54:50,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 557 transitions, 9650 flow. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:54:50,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:54:50,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:54:50,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:54:52,369 INFO L124 PetriNetUnfolderBase]: 5257/8143 cut-off events. [2024-06-28 03:54:52,369 INFO L125 PetriNetUnfolderBase]: For 404104/404176 co-relation queries the response was YES. [2024-06-28 03:54:52,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67806 conditions, 8143 events. 5257/8143 cut-off events. For 404104/404176 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 49353 event pairs, 2105 based on Foata normal form. 36/8121 useless extension candidates. Maximal degree in co-relation 67689. Up to 7619 conditions per place. [2024-06-28 03:54:52,460 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 503 selfloop transitions, 11 changer transitions 0/570 dead transitions. [2024-06-28 03:54:52,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 570 transitions, 10750 flow [2024-06-28 03:54:52,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 03:54:52,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 03:54:52,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 86 transitions. [2024-06-28 03:54:52,462 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4095238095238095 [2024-06-28 03:54:52,462 INFO L175 Difference]: Start difference. First operand has 255 places, 557 transitions, 9650 flow. Second operand 5 states and 86 transitions. [2024-06-28 03:54:52,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 570 transitions, 10750 flow [2024-06-28 03:54:53,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 570 transitions, 10595 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-06-28 03:54:53,254 INFO L231 Difference]: Finished difference. Result has 256 places, 560 transitions, 9563 flow [2024-06-28 03:54:53,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9495, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=557, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=546, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=9563, PETRI_PLACES=256, PETRI_TRANSITIONS=560} [2024-06-28 03:54:53,255 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 213 predicate places. [2024-06-28 03:54:53,255 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 560 transitions, 9563 flow [2024-06-28 03:54:53,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:54:53,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:54:53,256 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:54:53,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-28 03:54:53,256 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:54:53,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:54:53,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1831356056, now seen corresponding path program 1 times [2024-06-28 03:54:53,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:54:53,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699292141] [2024-06-28 03:54:53,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:54:53,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:54:53,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:54:55,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:54:55,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:54:55,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699292141] [2024-06-28 03:54:55,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699292141] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:54:55,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:54:55,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:54:55,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20580455] [2024-06-28 03:54:55,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:54:55,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:54:55,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:54:55,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:54:55,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:54:55,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:54:55,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 560 transitions, 9563 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:54:55,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:54:55,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:54:55,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:54:58,518 INFO L124 PetriNetUnfolderBase]: 5855/8998 cut-off events. [2024-06-28 03:54:58,518 INFO L125 PetriNetUnfolderBase]: For 479321/479329 co-relation queries the response was YES. [2024-06-28 03:54:58,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72897 conditions, 8998 events. 5855/8998 cut-off events. For 479321/479329 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 54251 event pairs, 1891 based on Foata normal form. 82/9080 useless extension candidates. Maximal degree in co-relation 72779. Up to 7661 conditions per place. [2024-06-28 03:54:58,643 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 476 selfloop transitions, 152 changer transitions 8/640 dead transitions. [2024-06-28 03:54:58,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 640 transitions, 11568 flow [2024-06-28 03:54:58,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-28 03:54:58,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-28 03:54:58,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 265 transitions. [2024-06-28 03:54:58,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-28 03:54:58,654 INFO L175 Difference]: Start difference. First operand has 256 places, 560 transitions, 9563 flow. Second operand 15 states and 265 transitions. [2024-06-28 03:54:58,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 640 transitions, 11568 flow [2024-06-28 03:54:59,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 640 transitions, 11522 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-28 03:54:59,844 INFO L231 Difference]: Finished difference. Result has 268 places, 558 transitions, 9837 flow [2024-06-28 03:54:59,844 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9517, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=560, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=9837, PETRI_PLACES=268, PETRI_TRANSITIONS=558} [2024-06-28 03:54:59,845 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 225 predicate places. [2024-06-28 03:54:59,845 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 558 transitions, 9837 flow [2024-06-28 03:54:59,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:54:59,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:54:59,845 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:54:59,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-28 03:54:59,846 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:54:59,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:54:59,846 INFO L85 PathProgramCache]: Analyzing trace with hash -1819481816, now seen corresponding path program 2 times [2024-06-28 03:54:59,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:54:59,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769349405] [2024-06-28 03:54:59,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:54:59,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:54:59,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:55:02,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:55:02,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:55:02,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769349405] [2024-06-28 03:55:02,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769349405] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:55:02,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:55:02,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:55:02,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449891154] [2024-06-28 03:55:02,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:55:02,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:55:02,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:55:02,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:55:02,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:55:02,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:55:02,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 558 transitions, 9837 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:55:02,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:55:02,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:55:02,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:55:05,529 INFO L124 PetriNetUnfolderBase]: 5811/8942 cut-off events. [2024-06-28 03:55:05,529 INFO L125 PetriNetUnfolderBase]: For 483432/483440 co-relation queries the response was YES. [2024-06-28 03:55:05,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72843 conditions, 8942 events. 5811/8942 cut-off events. For 483432/483440 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 54000 event pairs, 1631 based on Foata normal form. 72/9014 useless extension candidates. Maximal degree in co-relation 72724. Up to 6945 conditions per place. [2024-06-28 03:55:05,654 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 483 selfloop transitions, 145 changer transitions 16/648 dead transitions. [2024-06-28 03:55:05,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 648 transitions, 12035 flow [2024-06-28 03:55:05,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-28 03:55:05,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-28 03:55:05,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 270 transitions. [2024-06-28 03:55:05,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-28 03:55:05,656 INFO L175 Difference]: Start difference. First operand has 268 places, 558 transitions, 9837 flow. Second operand 15 states and 270 transitions. [2024-06-28 03:55:05,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 648 transitions, 12035 flow [2024-06-28 03:55:06,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 648 transitions, 11771 flow, removed 27 selfloop flow, removed 10 redundant places. [2024-06-28 03:55:06,704 INFO L231 Difference]: Finished difference. Result has 273 places, 550 transitions, 9741 flow [2024-06-28 03:55:06,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9573, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=558, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=9741, PETRI_PLACES=273, PETRI_TRANSITIONS=550} [2024-06-28 03:55:06,705 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 230 predicate places. [2024-06-28 03:55:06,705 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 550 transitions, 9741 flow [2024-06-28 03:55:06,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:55:06,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:55:06,706 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:55:06,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-28 03:55:06,706 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:55:06,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:55:06,706 INFO L85 PathProgramCache]: Analyzing trace with hash 467895690, now seen corresponding path program 3 times [2024-06-28 03:55:06,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:55:06,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422838270] [2024-06-28 03:55:06,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:55:06,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:55:06,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:55:08,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:55:08,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:55:08,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422838270] [2024-06-28 03:55:08,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422838270] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:55:08,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:55:08,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:55:08,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894989728] [2024-06-28 03:55:08,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:55:08,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:55:08,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:55:08,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:55:08,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:55:08,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:55:08,524 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 550 transitions, 9741 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:55:08,524 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:55:08,524 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:55:08,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:55:11,972 INFO L124 PetriNetUnfolderBase]: 6529/10107 cut-off events. [2024-06-28 03:55:11,972 INFO L125 PetriNetUnfolderBase]: For 574377/574385 co-relation queries the response was YES. [2024-06-28 03:55:12,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84575 conditions, 10107 events. 6529/10107 cut-off events. For 574377/574385 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 63097 event pairs, 1678 based on Foata normal form. 24/10131 useless extension candidates. Maximal degree in co-relation 84455. Up to 5426 conditions per place. [2024-06-28 03:55:12,110 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 470 selfloop transitions, 169 changer transitions 0/643 dead transitions. [2024-06-28 03:55:12,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 643 transitions, 12246 flow [2024-06-28 03:55:12,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-28 03:55:12,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-28 03:55:12,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 239 transitions. [2024-06-28 03:55:12,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43772893772893773 [2024-06-28 03:55:12,111 INFO L175 Difference]: Start difference. First operand has 273 places, 550 transitions, 9741 flow. Second operand 13 states and 239 transitions. [2024-06-28 03:55:12,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 643 transitions, 12246 flow [2024-06-28 03:55:13,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 643 transitions, 11872 flow, removed 43 selfloop flow, removed 13 redundant places. [2024-06-28 03:55:13,286 INFO L231 Difference]: Finished difference. Result has 273 places, 558 transitions, 10022 flow [2024-06-28 03:55:13,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9386, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=550, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=10022, PETRI_PLACES=273, PETRI_TRANSITIONS=558} [2024-06-28 03:55:13,287 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 230 predicate places. [2024-06-28 03:55:13,287 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 558 transitions, 10022 flow [2024-06-28 03:55:13,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:55:13,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:55:13,288 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:55:13,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-28 03:55:13,288 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:55:13,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:55:13,288 INFO L85 PathProgramCache]: Analyzing trace with hash -132162506, now seen corresponding path program 4 times [2024-06-28 03:55:13,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:55:13,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759830772] [2024-06-28 03:55:13,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:55:13,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:55:13,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:55:15,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:55:15,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:55:15,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759830772] [2024-06-28 03:55:15,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759830772] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:55:15,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:55:15,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:55:15,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871159078] [2024-06-28 03:55:15,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:55:15,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:55:15,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:55:15,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:55:15,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:55:15,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:55:15,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 558 transitions, 10022 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:55:15,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:55:15,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:55:15,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:55:20,388 INFO L124 PetriNetUnfolderBase]: 8673/13585 cut-off events. [2024-06-28 03:55:20,389 INFO L125 PetriNetUnfolderBase]: For 909212/909220 co-relation queries the response was YES. [2024-06-28 03:55:20,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113057 conditions, 13585 events. 8673/13585 cut-off events. For 909212/909220 co-relation queries the response was YES. Maximal size of possible extension queue 609. Compared 91067 event pairs, 2514 based on Foata normal form. 80/13665 useless extension candidates. Maximal degree in co-relation 112935. Up to 9181 conditions per place. [2024-06-28 03:55:20,584 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 535 selfloop transitions, 129 changer transitions 0/668 dead transitions. [2024-06-28 03:55:20,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 668 transitions, 12947 flow [2024-06-28 03:55:20,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-28 03:55:20,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-28 03:55:20,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 265 transitions. [2024-06-28 03:55:20,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45068027210884354 [2024-06-28 03:55:20,586 INFO L175 Difference]: Start difference. First operand has 273 places, 558 transitions, 10022 flow. Second operand 14 states and 265 transitions. [2024-06-28 03:55:20,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 668 transitions, 12947 flow [2024-06-28 03:55:22,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 668 transitions, 12564 flow, removed 92 selfloop flow, removed 9 redundant places. [2024-06-28 03:55:22,907 INFO L231 Difference]: Finished difference. Result has 280 places, 571 transitions, 10436 flow [2024-06-28 03:55:22,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9737, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=558, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=10436, PETRI_PLACES=280, PETRI_TRANSITIONS=571} [2024-06-28 03:55:22,908 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 237 predicate places. [2024-06-28 03:55:22,908 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 571 transitions, 10436 flow [2024-06-28 03:55:22,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:55:22,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:55:22,908 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:55:22,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-28 03:55:22,909 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:55:22,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:55:22,909 INFO L85 PathProgramCache]: Analyzing trace with hash -43448876, now seen corresponding path program 5 times [2024-06-28 03:55:22,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:55:22,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831796915] [2024-06-28 03:55:22,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:55:22,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:55:22,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:55:25,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:55:25,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:55:25,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831796915] [2024-06-28 03:55:25,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831796915] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:55:25,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:55:25,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:55:25,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454745984] [2024-06-28 03:55:25,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:55:25,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:55:25,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:55:25,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:55:25,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:55:25,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:55:25,621 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 571 transitions, 10436 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:55:25,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:55:25,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:55:25,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:55:30,111 INFO L124 PetriNetUnfolderBase]: 9030/14187 cut-off events. [2024-06-28 03:55:30,112 INFO L125 PetriNetUnfolderBase]: For 959677/959685 co-relation queries the response was YES. [2024-06-28 03:55:30,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116337 conditions, 14187 events. 9030/14187 cut-off events. For 959677/959685 co-relation queries the response was YES. Maximal size of possible extension queue 624. Compared 96275 event pairs, 3690 based on Foata normal form. 102/14289 useless extension candidates. Maximal degree in co-relation 116211. Up to 12724 conditions per place. [2024-06-28 03:55:30,296 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 524 selfloop transitions, 115 changer transitions 0/643 dead transitions. [2024-06-28 03:55:30,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 643 transitions, 12527 flow [2024-06-28 03:55:30,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-28 03:55:30,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-28 03:55:30,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 232 transitions. [2024-06-28 03:55:30,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4249084249084249 [2024-06-28 03:55:30,304 INFO L175 Difference]: Start difference. First operand has 280 places, 571 transitions, 10436 flow. Second operand 13 states and 232 transitions. [2024-06-28 03:55:30,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 643 transitions, 12527 flow [2024-06-28 03:55:33,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 643 transitions, 12243 flow, removed 79 selfloop flow, removed 9 redundant places. [2024-06-28 03:55:33,046 INFO L231 Difference]: Finished difference. Result has 284 places, 576 transitions, 10591 flow [2024-06-28 03:55:33,047 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10158, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=571, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=456, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=10591, PETRI_PLACES=284, PETRI_TRANSITIONS=576} [2024-06-28 03:55:33,047 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 241 predicate places. [2024-06-28 03:55:33,047 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 576 transitions, 10591 flow [2024-06-28 03:55:33,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:55:33,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:55:33,048 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:55:33,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-28 03:55:33,048 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:55:33,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:55:33,048 INFO L85 PathProgramCache]: Analyzing trace with hash -571617854, now seen corresponding path program 6 times [2024-06-28 03:55:33,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:55:33,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551268468] [2024-06-28 03:55:33,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:55:33,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:55:33,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:55:35,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:55:35,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:55:35,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551268468] [2024-06-28 03:55:35,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551268468] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:55:35,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:55:35,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:55:35,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177009962] [2024-06-28 03:55:35,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:55:35,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:55:35,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:55:35,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:55:35,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:55:35,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:55:35,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 576 transitions, 10591 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:55:35,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:55:35,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:55:35,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:55:40,725 INFO L124 PetriNetUnfolderBase]: 9114/14355 cut-off events. [2024-06-28 03:55:40,726 INFO L125 PetriNetUnfolderBase]: For 918504/918512 co-relation queries the response was YES. [2024-06-28 03:55:40,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114210 conditions, 14355 events. 9114/14355 cut-off events. For 918504/918512 co-relation queries the response was YES. Maximal size of possible extension queue 625. Compared 97944 event pairs, 3274 based on Foata normal form. 88/14443 useless extension candidates. Maximal degree in co-relation 114082. Up to 11150 conditions per place. [2024-06-28 03:55:40,907 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 534 selfloop transitions, 117 changer transitions 0/655 dead transitions. [2024-06-28 03:55:40,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 655 transitions, 12802 flow [2024-06-28 03:55:40,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-28 03:55:40,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-28 03:55:40,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 237 transitions. [2024-06-28 03:55:40,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4340659340659341 [2024-06-28 03:55:40,909 INFO L175 Difference]: Start difference. First operand has 284 places, 576 transitions, 10591 flow. Second operand 13 states and 237 transitions. [2024-06-28 03:55:40,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 655 transitions, 12802 flow [2024-06-28 03:55:43,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 655 transitions, 12548 flow, removed 48 selfloop flow, removed 8 redundant places. [2024-06-28 03:55:43,242 INFO L231 Difference]: Finished difference. Result has 290 places, 579 transitions, 10735 flow [2024-06-28 03:55:43,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10337, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=576, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=459, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=10735, PETRI_PLACES=290, PETRI_TRANSITIONS=579} [2024-06-28 03:55:43,242 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 247 predicate places. [2024-06-28 03:55:43,242 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 579 transitions, 10735 flow [2024-06-28 03:55:43,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:55:43,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:55:43,243 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:55:43,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-28 03:55:43,243 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:55:43,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:55:43,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1287048630, now seen corresponding path program 7 times [2024-06-28 03:55:43,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:55:43,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342156353] [2024-06-28 03:55:43,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:55:43,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:55:43,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:55:45,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:55:45,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:55:45,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342156353] [2024-06-28 03:55:45,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342156353] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:55:45,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:55:45,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:55:45,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155323079] [2024-06-28 03:55:45,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:55:45,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:55:45,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:55:45,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:55:45,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:55:45,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:55:45,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 579 transitions, 10735 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:55:45,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:55:45,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:55:45,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:55:51,089 INFO L124 PetriNetUnfolderBase]: 9426/14907 cut-off events. [2024-06-28 03:55:51,090 INFO L125 PetriNetUnfolderBase]: For 958364/958366 co-relation queries the response was YES. [2024-06-28 03:55:51,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117656 conditions, 14907 events. 9426/14907 cut-off events. For 958364/958366 co-relation queries the response was YES. Maximal size of possible extension queue 642. Compared 103144 event pairs, 3545 based on Foata normal form. 76/14983 useless extension candidates. Maximal degree in co-relation 117526. Up to 11866 conditions per place. [2024-06-28 03:55:51,308 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 322 selfloop transitions, 345 changer transitions 0/671 dead transitions. [2024-06-28 03:55:51,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 671 transitions, 13130 flow [2024-06-28 03:55:51,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-28 03:55:51,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-28 03:55:51,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 253 transitions. [2024-06-28 03:55:51,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4633699633699634 [2024-06-28 03:55:51,310 INFO L175 Difference]: Start difference. First operand has 290 places, 579 transitions, 10735 flow. Second operand 13 states and 253 transitions. [2024-06-28 03:55:51,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 671 transitions, 13130 flow [2024-06-28 03:55:54,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 671 transitions, 12852 flow, removed 59 selfloop flow, removed 8 redundant places. [2024-06-28 03:55:54,061 INFO L231 Difference]: Finished difference. Result has 295 places, 581 transitions, 11266 flow [2024-06-28 03:55:54,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10457, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=579, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=343, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=11266, PETRI_PLACES=295, PETRI_TRANSITIONS=581} [2024-06-28 03:55:54,062 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 252 predicate places. [2024-06-28 03:55:54,062 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 581 transitions, 11266 flow [2024-06-28 03:55:54,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:55:54,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:55:54,063 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:55:54,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-28 03:55:54,063 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:55:54,063 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:55:54,064 INFO L85 PathProgramCache]: Analyzing trace with hash 35614674, now seen corresponding path program 8 times [2024-06-28 03:55:54,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:55:54,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386429225] [2024-06-28 03:55:54,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:55:54,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:55:54,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:55:56,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:55:56,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:55:56,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386429225] [2024-06-28 03:55:56,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386429225] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:55:56,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:55:56,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:55:56,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186085431] [2024-06-28 03:55:56,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:55:56,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:55:56,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:55:56,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:55:56,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:55:56,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:55:56,695 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 581 transitions, 11266 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:55:56,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:55:56,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:55:56,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:56:02,735 INFO L124 PetriNetUnfolderBase]: 9738/15431 cut-off events. [2024-06-28 03:56:02,735 INFO L125 PetriNetUnfolderBase]: For 1008784/1008786 co-relation queries the response was YES. [2024-06-28 03:56:02,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122066 conditions, 15431 events. 9738/15431 cut-off events. For 1008784/1008786 co-relation queries the response was YES. Maximal size of possible extension queue 663. Compared 107808 event pairs, 3720 based on Foata normal form. 76/15507 useless extension candidates. Maximal degree in co-relation 121935. Up to 12390 conditions per place. [2024-06-28 03:56:02,968 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 337 selfloop transitions, 341 changer transitions 0/682 dead transitions. [2024-06-28 03:56:02,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 682 transitions, 13745 flow [2024-06-28 03:56:02,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-28 03:56:02,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-28 03:56:02,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 275 transitions. [2024-06-28 03:56:02,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.467687074829932 [2024-06-28 03:56:02,978 INFO L175 Difference]: Start difference. First operand has 295 places, 581 transitions, 11266 flow. Second operand 14 states and 275 transitions. [2024-06-28 03:56:02,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 682 transitions, 13745 flow [2024-06-28 03:56:05,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 682 transitions, 13047 flow, removed 40 selfloop flow, removed 10 redundant places. [2024-06-28 03:56:05,415 INFO L231 Difference]: Finished difference. Result has 299 places, 583 transitions, 11373 flow [2024-06-28 03:56:05,416 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10568, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=581, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=339, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=11373, PETRI_PLACES=299, PETRI_TRANSITIONS=583} [2024-06-28 03:56:05,417 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 256 predicate places. [2024-06-28 03:56:05,417 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 583 transitions, 11373 flow [2024-06-28 03:56:05,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:56:05,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:56:05,420 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:56:05,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-28 03:56:05,421 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:56:05,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:56:05,421 INFO L85 PathProgramCache]: Analyzing trace with hash 35466804, now seen corresponding path program 9 times [2024-06-28 03:56:05,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:56:05,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270920348] [2024-06-28 03:56:05,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:56:05,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:56:05,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:56:08,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:56:08,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:56:08,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270920348] [2024-06-28 03:56:08,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270920348] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:56:08,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:56:08,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:56:08,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338357317] [2024-06-28 03:56:08,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:56:08,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:56:08,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:56:08,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:56:08,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:56:08,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:56:08,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 583 transitions, 11373 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:56:08,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:56:08,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:56:08,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:56:14,535 INFO L124 PetriNetUnfolderBase]: 10299/16342 cut-off events. [2024-06-28 03:56:14,535 INFO L125 PetriNetUnfolderBase]: For 1103261/1103263 co-relation queries the response was YES. [2024-06-28 03:56:14,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129597 conditions, 16342 events. 10299/16342 cut-off events. For 1103261/1103263 co-relation queries the response was YES. Maximal size of possible extension queue 705. Compared 115487 event pairs, 3746 based on Foata normal form. 66/16408 useless extension candidates. Maximal degree in co-relation 129465. Up to 11759 conditions per place. [2024-06-28 03:56:14,747 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 347 selfloop transitions, 344 changer transitions 0/695 dead transitions. [2024-06-28 03:56:14,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 695 transitions, 14146 flow [2024-06-28 03:56:14,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-28 03:56:14,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-28 03:56:14,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 280 transitions. [2024-06-28 03:56:14,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-28 03:56:14,749 INFO L175 Difference]: Start difference. First operand has 299 places, 583 transitions, 11373 flow. Second operand 14 states and 280 transitions. [2024-06-28 03:56:14,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 695 transitions, 14146 flow [2024-06-28 03:56:16,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 695 transitions, 13387 flow, removed 42 selfloop flow, removed 12 redundant places. [2024-06-28 03:56:16,814 INFO L231 Difference]: Finished difference. Result has 302 places, 588 transitions, 11543 flow [2024-06-28 03:56:16,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10614, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=583, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=340, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=11543, PETRI_PLACES=302, PETRI_TRANSITIONS=588} [2024-06-28 03:56:16,815 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 259 predicate places. [2024-06-28 03:56:16,815 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 588 transitions, 11543 flow [2024-06-28 03:56:16,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:56:16,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:56:16,816 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:56:16,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-28 03:56:16,816 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:56:16,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:56:16,816 INFO L85 PathProgramCache]: Analyzing trace with hash 41192256, now seen corresponding path program 1 times [2024-06-28 03:56:16,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:56:16,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002751367] [2024-06-28 03:56:16,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:56:16,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:56:16,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:56:20,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:56:20,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:56:20,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002751367] [2024-06-28 03:56:20,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002751367] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:56:20,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:56:20,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:56:20,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140618547] [2024-06-28 03:56:20,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:56:20,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:56:20,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:56:20,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:56:20,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:56:20,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:56:20,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 588 transitions, 11543 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:56:20,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:56:20,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:56:20,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:56:27,498 INFO L124 PetriNetUnfolderBase]: 10847/17269 cut-off events. [2024-06-28 03:56:27,498 INFO L125 PetriNetUnfolderBase]: For 1215171/1215173 co-relation queries the response was YES. [2024-06-28 03:56:27,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138056 conditions, 17269 events. 10847/17269 cut-off events. For 1215171/1215173 co-relation queries the response was YES. Maximal size of possible extension queue 753. Compared 123709 event pairs, 3820 based on Foata normal form. 56/17325 useless extension candidates. Maximal degree in co-relation 137922. Up to 12079 conditions per place. [2024-06-28 03:56:27,725 INFO L140 encePairwiseOnDemand]: 25/42 looper letters, 418 selfloop transitions, 321 changer transitions 0/743 dead transitions. [2024-06-28 03:56:27,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 743 transitions, 15248 flow [2024-06-28 03:56:27,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-28 03:56:27,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-28 03:56:27,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 256 transitions. [2024-06-28 03:56:27,727 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46886446886446886 [2024-06-28 03:56:27,727 INFO L175 Difference]: Start difference. First operand has 302 places, 588 transitions, 11543 flow. Second operand 13 states and 256 transitions. [2024-06-28 03:56:27,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 743 transitions, 15248 flow [2024-06-28 03:56:30,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 743 transitions, 14530 flow, removed 62 selfloop flow, removed 11 redundant places. [2024-06-28 03:56:30,244 INFO L231 Difference]: Finished difference. Result has 306 places, 631 transitions, 12519 flow [2024-06-28 03:56:30,244 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10884, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=588, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=279, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=12519, PETRI_PLACES=306, PETRI_TRANSITIONS=631} [2024-06-28 03:56:30,245 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 263 predicate places. [2024-06-28 03:56:30,245 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 631 transitions, 12519 flow [2024-06-28 03:56:30,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:56:30,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:56:30,245 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:56:30,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-28 03:56:30,245 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:56:30,246 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:56:30,246 INFO L85 PathProgramCache]: Analyzing trace with hash 360627308, now seen corresponding path program 10 times [2024-06-28 03:56:30,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:56:30,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363883665] [2024-06-28 03:56:30,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:56:30,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:56:30,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:56:33,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:56:33,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:56:33,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363883665] [2024-06-28 03:56:33,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363883665] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:56:33,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:56:33,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:56:33,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798439261] [2024-06-28 03:56:33,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:56:33,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:56:33,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:56:33,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:56:33,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:56:33,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:56:33,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 631 transitions, 12519 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:56:33,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:56:33,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:56:33,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand