./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe018_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/safe018_power.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe018_power.oepc.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe018_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-eb4cb34-m [2024-06-21 21:54:54,115 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 21:54:54,190 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 21:54:54,194 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 21:54:54,195 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 21:54:54,221 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 21:54:54,222 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 21:54:54,222 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 21:54:54,223 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 21:54:54,223 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 21:54:54,223 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 21:54:54,224 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 21:54:54,224 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 21:54:54,225 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 21:54:54,225 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 21:54:54,225 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 21:54:54,226 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 21:54:54,226 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 21:54:54,226 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 21:54:54,227 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 21:54:54,227 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 21:54:54,229 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 21:54:54,229 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 21:54:54,229 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 21:54:54,230 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 21:54:54,230 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 21:54:54,230 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 21:54:54,231 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 21:54:54,231 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 21:54:54,231 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 21:54:54,232 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 21:54:54,233 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 21:54:54,233 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 21:54:54,233 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 21:54:54,233 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 21:54:54,234 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 21:54:54,234 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 21:54:54,234 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 21:54:54,234 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 21:54:54,235 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 21:54:54,235 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 21:54:54,235 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 21:54:54,235 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 21:54:54,236 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 21:54:54,476 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 21:54:54,497 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 21:54:54,499 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 21:54:54,500 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 21:54:54,500 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 21:54:54,501 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe018_power.oepc.yml/witness.yml [2024-06-21 21:54:54,725 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 21:54:54,726 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 21:54:54,727 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe018_power.oepc.i [2024-06-21 21:54:55,825 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 21:54:56,075 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 21:54:56,076 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe018_power.oepc.i [2024-06-21 21:54:56,091 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c3b6c82ec/9594b073dc0a41cd8042f23f6d6b254a/FLAGcc7d89fcd [2024-06-21 21:54:56,109 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c3b6c82ec/9594b073dc0a41cd8042f23f6d6b254a [2024-06-21 21:54:56,109 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 21:54:56,110 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 21:54:56,111 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 21:54:56,111 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 21:54:56,116 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 21:54:56,117 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 09:54:54" (1/2) ... [2024-06-21 21:54:56,118 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c219740 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:54:56, skipping insertion in model container [2024-06-21 21:54:56,118 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 09:54:54" (1/2) ... [2024-06-21 21:54:56,119 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@16aff970 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:54:56, skipping insertion in model container [2024-06-21 21:54:56,119 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 09:54:56" (2/2) ... [2024-06-21 21:54:56,119 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c219740 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:54:56, skipping insertion in model container [2024-06-21 21:54:56,120 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 09:54:56" (2/2) ... [2024-06-21 21:54:56,120 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 21:54:56,271 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 21:54:56,272 INFO L97 edCorrectnessWitness]: Location invariant before [L835-L835] ((((((((((((((((((((((((((((((((((((! 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 == 0 || __unbuffered_p0_EAX == 1)) && (__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_EBX == 0 || __unbuffered_p0_EBX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1)) && (y$mem_tmp == 0 || y$mem_tmp == 1)))) && (! 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$read_delayed_var == 1))))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! 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))) && (! 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$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (y$mem_tmp == 0 || y$mem_tmp == 1))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0) [2024-06-21 21:54:56,272 INFO L97 edCorrectnessWitness]: Location invariant before [L838-L838] ((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$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$w_buff1_used == (_Bool)0) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1)))) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1)) && (y$mem_tmp == 0 || y$mem_tmp == 1)))) && (! multithreaded || __unbuffered_p0_EAX$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))))) && (! 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))) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || y$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$mem_tmp == 0 || y$mem_tmp == 1))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0) [2024-06-21 21:54:56,273 INFO L97 edCorrectnessWitness]: Location invariant before [L837-L837] ((((((((((((((((((((((((((((((((((((! 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 == 0 || __unbuffered_p0_EAX == 1)) && (__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_EBX == 0 || __unbuffered_p0_EBX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1)) && (y$mem_tmp == 0 || y$mem_tmp == 1)))) && (! 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$read_delayed_var == 1))))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! 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))) && (! 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$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (y$mem_tmp == 0 || y$mem_tmp == 1))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0) [2024-06-21 21:54:56,273 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 21:54:56,273 INFO L106 edCorrectnessWitness]: ghost_update [L833-L833] multithreaded = 1; [2024-06-21 21:54:56,319 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 21:54:56,758 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 21:54:56,771 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 21:54:56,919 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 21:54:56,955 INFO L206 MainTranslator]: Completed translation [2024-06-21 21:54:56,956 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:54:56 WrapperNode [2024-06-21 21:54:56,956 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 21:54:56,958 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 21:54:56,958 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 21:54:56,958 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 21:54:56,965 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:54:56" (1/1) ... [2024-06-21 21:54:57,003 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:54:56" (1/1) ... [2024-06-21 21:54:57,049 INFO L138 Inliner]: procedures = 175, calls = 80, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 208 [2024-06-21 21:54:57,050 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 21:54:57,050 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 21:54:57,050 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 21:54:57,054 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 21:54:57,087 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:54:56" (1/1) ... [2024-06-21 21:54:57,087 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:54:56" (1/1) ... [2024-06-21 21:54:57,123 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:54:56" (1/1) ... [2024-06-21 21:54:57,163 INFO L175 MemorySlicer]: Split 41 memory accesses to 2 slices as follows [2, 39]. 95 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 5 writes are split as follows [0, 5]. [2024-06-21 21:54:57,163 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:54:56" (1/1) ... [2024-06-21 21:54:57,163 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:54:56" (1/1) ... [2024-06-21 21:54:57,188 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:54:56" (1/1) ... [2024-06-21 21:54:57,197 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:54:56" (1/1) ... [2024-06-21 21:54:57,207 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:54:56" (1/1) ... [2024-06-21 21:54:57,209 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:54:56" (1/1) ... [2024-06-21 21:54:57,214 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 21:54:57,215 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 21:54:57,215 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 21:54:57,215 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 21:54:57,216 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:54:56" (1/1) ... [2024-06-21 21:54:57,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 21:54:57,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 21:54:57,259 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-21 21:54:57,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-21 21:54:57,300 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-21 21:54:57,300 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-21 21:54:57,300 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-21 21:54:57,300 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-21 21:54:57,300 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 21:54:57,301 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 21:54:57,301 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 21:54:57,301 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 21:54:57,301 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 21:54:57,301 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 21:54:57,302 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 21:54:57,302 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 21:54:57,303 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 21:54:57,303 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-21 21:54:57,304 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 21:54:57,304 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 21:54:57,306 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 21:54:57,307 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 21:54:57,483 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 21:54:57,485 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 21:54:58,009 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 21:54:58,009 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 21:54:58,483 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 21:54:58,484 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 21:54:58,485 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 09:54:58 BoogieIcfgContainer [2024-06-21 21:54:58,485 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 21:54:58,488 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 21:54:58,489 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 21:54:58,492 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 21:54:58,492 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 09:54:54" (1/4) ... [2024-06-21 21:54:58,492 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@172e890e and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 09:54:58, skipping insertion in model container [2024-06-21 21:54:58,493 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 09:54:56" (2/4) ... [2024-06-21 21:54:58,493 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@172e890e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 09:54:58, skipping insertion in model container [2024-06-21 21:54:58,493 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:54:56" (3/4) ... [2024-06-21 21:54:58,493 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@172e890e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 09:54:58, skipping insertion in model container [2024-06-21 21:54:58,494 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 09:54:58" (4/4) ... [2024-06-21 21:54:58,495 INFO L112 eAbstractionObserver]: Analyzing ICFG safe018_power.oepc.i [2024-06-21 21:54:58,514 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 21:54:58,514 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-21 21:54:58,514 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 21:54:58,598 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 21:54:58,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 41 transitions, 94 flow [2024-06-21 21:54:58,679 INFO L124 PetriNetUnfolderBase]: 0/38 cut-off events. [2024-06-21 21:54:58,680 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 21:54:58,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 38 events. 0/38 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 51 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 21:54:58,683 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 41 transitions, 94 flow [2024-06-21 21:54:58,687 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 32 transitions, 73 flow [2024-06-21 21:54:58,702 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 21:54:58,711 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;@5d126243, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 21:54:58,712 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-21 21:54:58,719 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 21:54:58,719 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 21:54:58,719 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 21:54:58,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:54:58,720 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 21:54:58,721 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)] === [2024-06-21 21:54:58,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:54:58,729 INFO L85 PathProgramCache]: Analyzing trace with hash 720258345, now seen corresponding path program 1 times [2024-06-21 21:54:58,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:54:58,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294434586] [2024-06-21 21:54:58,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:54:58,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:54:58,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:55:01,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:55:01,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:55:01,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294434586] [2024-06-21 21:55:01,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294434586] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:55:01,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:55:01,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 21:55:01,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464553941] [2024-06-21 21:55:01,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:55:01,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 21:55:01,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:55:01,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 21:55:01,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 21:55:01,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-21 21:55:01,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:55:01,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:55:01,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-21 21:55:01,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:55:01,603 INFO L124 PetriNetUnfolderBase]: 602/990 cut-off events. [2024-06-21 21:55:01,604 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-06-21 21:55:01,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1977 conditions, 990 events. 602/990 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 4658 event pairs, 367 based on Foata normal form. 1/968 useless extension candidates. Maximal degree in co-relation 1965. Up to 930 conditions per place. [2024-06-21 21:55:01,617 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 32 selfloop transitions, 4 changer transitions 0/44 dead transitions. [2024-06-21 21:55:01,617 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 44 transitions, 175 flow [2024-06-21 21:55:01,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 21:55:01,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 21:55:01,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 72 transitions. [2024-06-21 21:55:01,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-21 21:55:01,630 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 73 flow. Second operand 3 states and 72 transitions. [2024-06-21 21:55:01,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 44 transitions, 175 flow [2024-06-21 21:55:01,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 44 transitions, 170 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 21:55:01,637 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 100 flow [2024-06-21 21:55:01,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2024-06-21 21:55:01,642 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 0 predicate places. [2024-06-21 21:55:01,642 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 100 flow [2024-06-21 21:55:01,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:55:01,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:55:01,643 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:55:01,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 21:55:01,643 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)] === [2024-06-21 21:55:01,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:55:01,644 INFO L85 PathProgramCache]: Analyzing trace with hash 679406862, now seen corresponding path program 1 times [2024-06-21 21:55:01,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:55:01,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720289597] [2024-06-21 21:55:01,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:55:01,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:55:01,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:55:04,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:55:04,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:55:04,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720289597] [2024-06-21 21:55:04,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720289597] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:55:04,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:55:04,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 21:55:04,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46323690] [2024-06-21 21:55:04,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:55:04,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 21:55:04,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:55:04,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 21:55:04,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-21 21:55:04,396 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-21 21:55:04,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 100 flow. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:55:04,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:55:04,397 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-21 21:55:04,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:55:04,981 INFO L124 PetriNetUnfolderBase]: 596/982 cut-off events. [2024-06-21 21:55:04,981 INFO L125 PetriNetUnfolderBase]: For 207/215 co-relation queries the response was YES. [2024-06-21 21:55:04,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2276 conditions, 982 events. 596/982 cut-off events. For 207/215 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 4604 event pairs, 277 based on Foata normal form. 6/987 useless extension candidates. Maximal degree in co-relation 2264. Up to 902 conditions per place. [2024-06-21 21:55:04,988 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 41 selfloop transitions, 7 changer transitions 0/56 dead transitions. [2024-06-21 21:55:04,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 56 transitions, 250 flow [2024-06-21 21:55:04,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 21:55:04,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 21:55:04,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 95 transitions. [2024-06-21 21:55:04,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5792682926829268 [2024-06-21 21:55:04,990 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 100 flow. Second operand 4 states and 95 transitions. [2024-06-21 21:55:04,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 56 transitions, 250 flow [2024-06-21 21:55:04,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 56 transitions, 246 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 21:55:04,992 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 136 flow [2024-06-21 21:55:04,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=136, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2024-06-21 21:55:04,993 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 3 predicate places. [2024-06-21 21:55:04,993 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 136 flow [2024-06-21 21:55:04,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:55:04,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:55:04,994 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:55:04,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 21:55:04,994 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)] === [2024-06-21 21:55:04,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:55:04,995 INFO L85 PathProgramCache]: Analyzing trace with hash -1969864464, now seen corresponding path program 1 times [2024-06-21 21:55:04,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:55:04,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914311189] [2024-06-21 21:55:04,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:55:04,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:55:05,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:55:08,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:55:08,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:55:08,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914311189] [2024-06-21 21:55:08,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914311189] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:55:08,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:55:08,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 21:55:08,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253792246] [2024-06-21 21:55:08,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:55:08,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 21:55:08,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:55:08,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 21:55:08,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 21:55:08,184 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 21:55:08,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 136 flow. Second operand has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:55:08,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:55:08,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 21:55:08,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:55:09,110 INFO L124 PetriNetUnfolderBase]: 754/1210 cut-off events. [2024-06-21 21:55:09,110 INFO L125 PetriNetUnfolderBase]: For 709/725 co-relation queries the response was YES. [2024-06-21 21:55:09,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3144 conditions, 1210 events. 754/1210 cut-off events. For 709/725 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 5591 event pairs, 215 based on Foata normal form. 12/1221 useless extension candidates. Maximal degree in co-relation 3130. Up to 1079 conditions per place. [2024-06-21 21:55:09,120 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 56 selfloop transitions, 12 changer transitions 0/75 dead transitions. [2024-06-21 21:55:09,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 75 transitions, 374 flow [2024-06-21 21:55:09,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:55:09,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:55:09,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 131 transitions. [2024-06-21 21:55:09,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.532520325203252 [2024-06-21 21:55:09,126 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 136 flow. Second operand 6 states and 131 transitions. [2024-06-21 21:55:09,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 75 transitions, 374 flow [2024-06-21 21:55:09,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 75 transitions, 354 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-21 21:55:09,130 INFO L231 Difference]: Finished difference. Result has 49 places, 42 transitions, 179 flow [2024-06-21 21:55:09,130 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=179, PETRI_PLACES=49, PETRI_TRANSITIONS=42} [2024-06-21 21:55:09,131 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 7 predicate places. [2024-06-21 21:55:09,131 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 42 transitions, 179 flow [2024-06-21 21:55:09,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:55:09,132 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:55:09,132 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:55:09,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 21:55:09,132 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)] === [2024-06-21 21:55:09,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:55:09,133 INFO L85 PathProgramCache]: Analyzing trace with hash 1219030179, now seen corresponding path program 1 times [2024-06-21 21:55:09,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:55:09,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213048827] [2024-06-21 21:55:09,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:55:09,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:55:09,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:55:10,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:55:10,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:55:10,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213048827] [2024-06-21 21:55:10,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213048827] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:55:10,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:55:10,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 21:55:10,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276645393] [2024-06-21 21:55:10,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:55:10,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 21:55:10,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:55:10,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 21:55:10,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 21:55:10,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 21:55:10,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 42 transitions, 179 flow. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:55:10,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:55:10,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 21:55:10,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:55:11,852 INFO L124 PetriNetUnfolderBase]: 868/1376 cut-off events. [2024-06-21 21:55:11,852 INFO L125 PetriNetUnfolderBase]: For 1438/1438 co-relation queries the response was YES. [2024-06-21 21:55:11,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3929 conditions, 1376 events. 868/1376 cut-off events. For 1438/1438 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 6337 event pairs, 337 based on Foata normal form. 2/1378 useless extension candidates. Maximal degree in co-relation 3912. Up to 1311 conditions per place. [2024-06-21 21:55:11,863 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 49 selfloop transitions, 8 changer transitions 0/62 dead transitions. [2024-06-21 21:55:11,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 62 transitions, 352 flow [2024-06-21 21:55:11,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 21:55:11,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 21:55:11,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 88 transitions. [2024-06-21 21:55:11,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4292682926829268 [2024-06-21 21:55:11,865 INFO L175 Difference]: Start difference. First operand has 49 places, 42 transitions, 179 flow. Second operand 5 states and 88 transitions. [2024-06-21 21:55:11,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 62 transitions, 352 flow [2024-06-21 21:55:11,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 62 transitions, 321 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-21 21:55:11,872 INFO L231 Difference]: Finished difference. Result has 52 places, 48 transitions, 211 flow [2024-06-21 21:55:11,872 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=211, PETRI_PLACES=52, PETRI_TRANSITIONS=48} [2024-06-21 21:55:11,873 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 10 predicate places. [2024-06-21 21:55:11,874 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 48 transitions, 211 flow [2024-06-21 21:55:11,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:55:11,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:55:11,874 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:55:11,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 21:55:11,875 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)] === [2024-06-21 21:55:11,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:55:11,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1043735326, now seen corresponding path program 1 times [2024-06-21 21:55:11,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:55:11,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113164287] [2024-06-21 21:55:11,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:55:11,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:55:11,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:55:14,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:55:14,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:55:14,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113164287] [2024-06-21 21:55:14,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113164287] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:55:14,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:55:14,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:55:14,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970339796] [2024-06-21 21:55:14,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:55:14,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:55:14,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:55:14,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:55:14,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:55:14,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 21:55:14,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 48 transitions, 211 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:55:14,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:55:14,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 21:55:14,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:55:16,038 INFO L124 PetriNetUnfolderBase]: 881/1391 cut-off events. [2024-06-21 21:55:16,039 INFO L125 PetriNetUnfolderBase]: For 1985/1985 co-relation queries the response was YES. [2024-06-21 21:55:16,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4301 conditions, 1391 events. 881/1391 cut-off events. For 1985/1985 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 6416 event pairs, 320 based on Foata normal form. 2/1392 useless extension candidates. Maximal degree in co-relation 4281. Up to 1287 conditions per place. [2024-06-21 21:55:16,050 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 61 selfloop transitions, 15 changer transitions 0/81 dead transitions. [2024-06-21 21:55:16,050 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 81 transitions, 473 flow [2024-06-21 21:55:16,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:55:16,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:55:16,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 112 transitions. [2024-06-21 21:55:16,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45528455284552843 [2024-06-21 21:55:16,054 INFO L175 Difference]: Start difference. First operand has 52 places, 48 transitions, 211 flow. Second operand 6 states and 112 transitions. [2024-06-21 21:55:16,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 81 transitions, 473 flow [2024-06-21 21:55:16,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 81 transitions, 469 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-06-21 21:55:16,065 INFO L231 Difference]: Finished difference. Result has 58 places, 56 transitions, 296 flow [2024-06-21 21:55:16,065 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=207, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=296, PETRI_PLACES=58, PETRI_TRANSITIONS=56} [2024-06-21 21:55:16,068 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 16 predicate places. [2024-06-21 21:55:16,068 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 56 transitions, 296 flow [2024-06-21 21:55:16,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:55:16,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:55:16,068 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:55:16,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 21:55:16,069 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)] === [2024-06-21 21:55:16,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:55:16,069 INFO L85 PathProgramCache]: Analyzing trace with hash -7550716, now seen corresponding path program 2 times [2024-06-21 21:55:16,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:55:16,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339899263] [2024-06-21 21:55:16,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:55:16,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:55:16,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:55:18,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:55:18,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:55:18,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339899263] [2024-06-21 21:55:18,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339899263] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:55:18,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:55:18,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:55:18,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939015379] [2024-06-21 21:55:18,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:55:18,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:55:18,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:55:18,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:55:18,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:55:18,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 21:55:18,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 56 transitions, 296 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:55:18,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:55:18,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 21:55:18,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:55:19,838 INFO L124 PetriNetUnfolderBase]: 876/1390 cut-off events. [2024-06-21 21:55:19,838 INFO L125 PetriNetUnfolderBase]: For 3068/3074 co-relation queries the response was YES. [2024-06-21 21:55:19,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4738 conditions, 1390 events. 876/1390 cut-off events. For 3068/3074 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 6441 event pairs, 324 based on Foata normal form. 8/1398 useless extension candidates. Maximal degree in co-relation 4714. Up to 1282 conditions per place. [2024-06-21 21:55:19,849 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 55 selfloop transitions, 16 changer transitions 0/76 dead transitions. [2024-06-21 21:55:19,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 76 transitions, 491 flow [2024-06-21 21:55:19,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:55:19,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:55:19,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-21 21:55:19,851 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43089430894308944 [2024-06-21 21:55:19,851 INFO L175 Difference]: Start difference. First operand has 58 places, 56 transitions, 296 flow. Second operand 6 states and 106 transitions. [2024-06-21 21:55:19,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 76 transitions, 491 flow [2024-06-21 21:55:19,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 76 transitions, 463 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-21 21:55:19,856 INFO L231 Difference]: Finished difference. Result has 61 places, 57 transitions, 315 flow [2024-06-21 21:55:19,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=270, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=315, PETRI_PLACES=61, PETRI_TRANSITIONS=57} [2024-06-21 21:55:19,857 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 19 predicate places. [2024-06-21 21:55:19,857 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 57 transitions, 315 flow [2024-06-21 21:55:19,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:55:19,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:55:19,858 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:55:19,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 21:55:19,858 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)] === [2024-06-21 21:55:19,859 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:55:19,859 INFO L85 PathProgramCache]: Analyzing trace with hash -40610790, now seen corresponding path program 1 times [2024-06-21 21:55:19,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:55:19,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803780999] [2024-06-21 21:55:19,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:55:19,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:55:19,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:55:21,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:55:21,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:55:21,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803780999] [2024-06-21 21:55:21,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803780999] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:55:21,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:55:21,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:55:21,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558922220] [2024-06-21 21:55:21,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:55:21,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:55:21,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:55:21,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:55:21,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:55:21,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 21:55:21,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 57 transitions, 315 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:55:21,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:55:21,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 21:55:21,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:55:22,702 INFO L124 PetriNetUnfolderBase]: 868/1376 cut-off events. [2024-06-21 21:55:22,703 INFO L125 PetriNetUnfolderBase]: For 3542/3542 co-relation queries the response was YES. [2024-06-21 21:55:22,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4787 conditions, 1376 events. 868/1376 cut-off events. For 3542/3542 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 6309 event pairs, 296 based on Foata normal form. 4/1380 useless extension candidates. Maximal degree in co-relation 4762. Up to 1289 conditions per place. [2024-06-21 21:55:22,714 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 64 selfloop transitions, 10 changer transitions 0/79 dead transitions. [2024-06-21 21:55:22,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 79 transitions, 521 flow [2024-06-21 21:55:22,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:55:22,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:55:22,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 104 transitions. [2024-06-21 21:55:22,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42276422764227645 [2024-06-21 21:55:22,716 INFO L175 Difference]: Start difference. First operand has 61 places, 57 transitions, 315 flow. Second operand 6 states and 104 transitions. [2024-06-21 21:55:22,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 79 transitions, 521 flow [2024-06-21 21:55:22,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 79 transitions, 497 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-06-21 21:55:22,721 INFO L231 Difference]: Finished difference. Result has 64 places, 59 transitions, 332 flow [2024-06-21 21:55:22,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=291, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=332, PETRI_PLACES=64, PETRI_TRANSITIONS=59} [2024-06-21 21:55:22,722 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 22 predicate places. [2024-06-21 21:55:22,722 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 59 transitions, 332 flow [2024-06-21 21:55:22,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:55:22,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:55:22,722 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:55:22,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 21:55:22,723 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)] === [2024-06-21 21:55:22,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:55:22,723 INFO L85 PathProgramCache]: Analyzing trace with hash 2003824865, now seen corresponding path program 1 times [2024-06-21 21:55:22,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:55:22,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787101178] [2024-06-21 21:55:22,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:55:22,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:55:22,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:55:25,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:55:25,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:55:25,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787101178] [2024-06-21 21:55:25,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787101178] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:55:25,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:55:25,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:55:25,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590583244] [2024-06-21 21:55:25,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:55:25,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:55:25,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:55:25,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:55:25,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:55:26,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 21:55:26,014 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 59 transitions, 332 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 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) [2024-06-21 21:55:26,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:55:26,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 21:55:26,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:55:27,123 INFO L124 PetriNetUnfolderBase]: 886/1414 cut-off events. [2024-06-21 21:55:27,123 INFO L125 PetriNetUnfolderBase]: For 4613/4613 co-relation queries the response was YES. [2024-06-21 21:55:27,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5098 conditions, 1414 events. 886/1414 cut-off events. For 4613/4613 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 6671 event pairs, 272 based on Foata normal form. 3/1417 useless extension candidates. Maximal degree in co-relation 5071. Up to 1283 conditions per place. [2024-06-21 21:55:27,135 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 72 selfloop transitions, 19 changer transitions 0/96 dead transitions. [2024-06-21 21:55:27,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 96 transitions, 622 flow [2024-06-21 21:55:27,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:55:27,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:55:27,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-21 21:55:27,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45993031358885017 [2024-06-21 21:55:27,138 INFO L175 Difference]: Start difference. First operand has 64 places, 59 transitions, 332 flow. Second operand 7 states and 132 transitions. [2024-06-21 21:55:27,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 96 transitions, 622 flow [2024-06-21 21:55:27,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 96 transitions, 599 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-21 21:55:27,145 INFO L231 Difference]: Finished difference. Result has 67 places, 63 transitions, 388 flow [2024-06-21 21:55:27,145 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=309, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=388, PETRI_PLACES=67, PETRI_TRANSITIONS=63} [2024-06-21 21:55:27,147 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 25 predicate places. [2024-06-21 21:55:27,147 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 63 transitions, 388 flow [2024-06-21 21:55:27,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 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) [2024-06-21 21:55:27,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:55:27,148 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:55:27,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 21:55:27,148 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)] === [2024-06-21 21:55:27,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:55:27,149 INFO L85 PathProgramCache]: Analyzing trace with hash 2003944835, now seen corresponding path program 2 times [2024-06-21 21:55:27,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:55:27,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508009194] [2024-06-21 21:55:27,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:55:27,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:55:27,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:55:30,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:55:30,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:55:30,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508009194] [2024-06-21 21:55:30,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508009194] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:55:30,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:55:30,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:55:30,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608858013] [2024-06-21 21:55:30,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:55:30,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:55:30,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:55:30,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:55:30,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:55:30,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 21:55:30,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 63 transitions, 388 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 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) [2024-06-21 21:55:30,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:55:30,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 21:55:30,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:55:31,604 INFO L124 PetriNetUnfolderBase]: 899/1431 cut-off events. [2024-06-21 21:55:31,604 INFO L125 PetriNetUnfolderBase]: For 5649/5649 co-relation queries the response was YES. [2024-06-21 21:55:31,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5590 conditions, 1431 events. 899/1431 cut-off events. For 5649/5649 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 6700 event pairs, 294 based on Foata normal form. 2/1432 useless extension candidates. Maximal degree in co-relation 5562. Up to 1261 conditions per place. [2024-06-21 21:55:31,619 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 73 selfloop transitions, 25 changer transitions 0/103 dead transitions. [2024-06-21 21:55:31,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 103 transitions, 763 flow [2024-06-21 21:55:31,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:55:31,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:55:31,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-21 21:55:31,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4529616724738676 [2024-06-21 21:55:31,623 INFO L175 Difference]: Start difference. First operand has 67 places, 63 transitions, 388 flow. Second operand 7 states and 130 transitions. [2024-06-21 21:55:31,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 103 transitions, 763 flow [2024-06-21 21:55:31,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 103 transitions, 703 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-21 21:55:31,632 INFO L231 Difference]: Finished difference. Result has 71 places, 73 transitions, 494 flow [2024-06-21 21:55:31,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=339, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=494, PETRI_PLACES=71, PETRI_TRANSITIONS=73} [2024-06-21 21:55:31,633 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 29 predicate places. [2024-06-21 21:55:31,634 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 73 transitions, 494 flow [2024-06-21 21:55:31,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 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) [2024-06-21 21:55:31,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:55:31,634 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:55:31,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 21:55:31,635 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)] === [2024-06-21 21:55:31,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:55:31,643 INFO L85 PathProgramCache]: Analyzing trace with hash -234070623, now seen corresponding path program 3 times [2024-06-21 21:55:31,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:55:31,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431668488] [2024-06-21 21:55:31,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:55:31,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:55:31,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:55:34,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:55:34,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:55:34,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431668488] [2024-06-21 21:55:34,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431668488] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:55:34,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:55:34,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:55:34,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215322954] [2024-06-21 21:55:34,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:55:34,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:55:34,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:55:34,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:55:34,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:55:34,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 21:55:34,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 73 transitions, 494 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 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) [2024-06-21 21:55:34,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:55:34,397 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 21:55:34,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:55:35,576 INFO L124 PetriNetUnfolderBase]: 894/1425 cut-off events. [2024-06-21 21:55:35,576 INFO L125 PetriNetUnfolderBase]: For 7398/7398 co-relation queries the response was YES. [2024-06-21 21:55:35,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5966 conditions, 1425 events. 894/1425 cut-off events. For 7398/7398 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 6634 event pairs, 307 based on Foata normal form. 2/1426 useless extension candidates. Maximal degree in co-relation 5935. Up to 1256 conditions per place. [2024-06-21 21:55:35,587 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 67 selfloop transitions, 26 changer transitions 0/98 dead transitions. [2024-06-21 21:55:35,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 98 transitions, 749 flow [2024-06-21 21:55:35,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:55:35,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:55:35,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-21 21:55:35,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43205574912891986 [2024-06-21 21:55:35,591 INFO L175 Difference]: Start difference. First operand has 71 places, 73 transitions, 494 flow. Second operand 7 states and 124 transitions. [2024-06-21 21:55:35,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 98 transitions, 749 flow [2024-06-21 21:55:35,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 98 transitions, 711 flow, removed 15 selfloop flow, removed 2 redundant places. [2024-06-21 21:55:35,601 INFO L231 Difference]: Finished difference. Result has 76 places, 74 transitions, 527 flow [2024-06-21 21:55:35,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=460, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=527, PETRI_PLACES=76, PETRI_TRANSITIONS=74} [2024-06-21 21:55:35,602 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 34 predicate places. [2024-06-21 21:55:35,603 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 74 transitions, 527 flow [2024-06-21 21:55:35,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 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) [2024-06-21 21:55:35,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:55:35,603 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:55:35,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 21:55:35,603 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)] === [2024-06-21 21:55:35,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:55:35,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1199820739, now seen corresponding path program 1 times [2024-06-21 21:55:35,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:55:35,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982586471] [2024-06-21 21:55:35,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:55:35,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:55:35,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:55:37,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:55:37,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:55:37,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982586471] [2024-06-21 21:55:37,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982586471] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:55:37,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:55:37,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:55:37,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32159557] [2024-06-21 21:55:37,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:55:37,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:55:37,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:55:37,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:55:37,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:55:37,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 21:55:37,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 74 transitions, 527 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 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) [2024-06-21 21:55:37,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:55:37,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 21:55:37,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:55:38,931 INFO L124 PetriNetUnfolderBase]: 960/1534 cut-off events. [2024-06-21 21:55:38,931 INFO L125 PetriNetUnfolderBase]: For 8909/8909 co-relation queries the response was YES. [2024-06-21 21:55:38,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6656 conditions, 1534 events. 960/1534 cut-off events. For 8909/8909 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 7240 event pairs, 294 based on Foata normal form. 4/1537 useless extension candidates. Maximal degree in co-relation 6623. Up to 1362 conditions per place. [2024-06-21 21:55:38,942 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 88 selfloop transitions, 31 changer transitions 0/124 dead transitions. [2024-06-21 21:55:38,942 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 124 transitions, 997 flow [2024-06-21 21:55:38,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:55:38,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:55:38,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-21 21:55:38,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4420731707317073 [2024-06-21 21:55:38,944 INFO L175 Difference]: Start difference. First operand has 76 places, 74 transitions, 527 flow. Second operand 8 states and 145 transitions. [2024-06-21 21:55:38,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 124 transitions, 997 flow [2024-06-21 21:55:38,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 124 transitions, 936 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-21 21:55:38,957 INFO L231 Difference]: Finished difference. Result has 82 places, 90 transitions, 716 flow [2024-06-21 21:55:38,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=481, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=716, PETRI_PLACES=82, PETRI_TRANSITIONS=90} [2024-06-21 21:55:38,958 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 40 predicate places. [2024-06-21 21:55:38,958 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 90 transitions, 716 flow [2024-06-21 21:55:38,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 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) [2024-06-21 21:55:38,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:55:38,959 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:55:38,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 21:55:38,959 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)] === [2024-06-21 21:55:38,959 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:55:38,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1516736055, now seen corresponding path program 2 times [2024-06-21 21:55:38,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:55:38,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794024625] [2024-06-21 21:55:38,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:55:38,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:55:38,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:55:41,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:55:41,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:55:41,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794024625] [2024-06-21 21:55:41,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794024625] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:55:41,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:55:41,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:55:41,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010375587] [2024-06-21 21:55:41,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:55:41,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:55:41,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:55:41,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:55:41,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:55:41,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 21:55:41,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 90 transitions, 716 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 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) [2024-06-21 21:55:41,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:55:41,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 21:55:41,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:55:42,624 INFO L124 PetriNetUnfolderBase]: 980/1566 cut-off events. [2024-06-21 21:55:42,624 INFO L125 PetriNetUnfolderBase]: For 10732/10732 co-relation queries the response was YES. [2024-06-21 21:55:42,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7126 conditions, 1566 events. 980/1566 cut-off events. For 10732/10732 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 7395 event pairs, 290 based on Foata normal form. 4/1569 useless extension candidates. Maximal degree in co-relation 7089. Up to 1368 conditions per place. [2024-06-21 21:55:42,638 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 84 selfloop transitions, 32 changer transitions 0/121 dead transitions. [2024-06-21 21:55:42,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 121 transitions, 1052 flow [2024-06-21 21:55:42,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:55:42,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:55:42,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-21 21:55:42,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-21 21:55:42,641 INFO L175 Difference]: Start difference. First operand has 82 places, 90 transitions, 716 flow. Second operand 7 states and 126 transitions. [2024-06-21 21:55:42,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 121 transitions, 1052 flow [2024-06-21 21:55:42,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 121 transitions, 1008 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-21 21:55:42,654 INFO L231 Difference]: Finished difference. Result has 86 places, 92 transitions, 771 flow [2024-06-21 21:55:42,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=672, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=771, PETRI_PLACES=86, PETRI_TRANSITIONS=92} [2024-06-21 21:55:42,656 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 44 predicate places. [2024-06-21 21:55:42,656 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 92 transitions, 771 flow [2024-06-21 21:55:42,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 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) [2024-06-21 21:55:42,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:55:42,656 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:55:42,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 21:55:42,659 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)] === [2024-06-21 21:55:42,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:55:42,659 INFO L85 PathProgramCache]: Analyzing trace with hash -754520393, now seen corresponding path program 3 times [2024-06-21 21:55:42,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:55:42,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598153787] [2024-06-21 21:55:42,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:55:42,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:55:42,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:55:45,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:55:45,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:55:45,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598153787] [2024-06-21 21:55:45,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598153787] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:55:45,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:55:45,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:55:45,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190480560] [2024-06-21 21:55:45,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:55:45,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:55:45,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:55:45,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:55:45,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:55:45,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 21:55:45,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 92 transitions, 771 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 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) [2024-06-21 21:55:45,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:55:45,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 21:55:45,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:55:46,230 INFO L124 PetriNetUnfolderBase]: 1000/1604 cut-off events. [2024-06-21 21:55:46,230 INFO L125 PetriNetUnfolderBase]: For 12924/12930 co-relation queries the response was YES. [2024-06-21 21:55:46,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7539 conditions, 1604 events. 1000/1604 cut-off events. For 12924/12930 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 7667 event pairs, 300 based on Foata normal form. 10/1614 useless extension candidates. Maximal degree in co-relation 7501. Up to 1422 conditions per place. [2024-06-21 21:55:46,242 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 85 selfloop transitions, 30 changer transitions 0/120 dead transitions. [2024-06-21 21:55:46,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 120 transitions, 1103 flow [2024-06-21 21:55:46,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:55:46,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:55:46,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-21 21:55:46,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4250871080139373 [2024-06-21 21:55:46,245 INFO L175 Difference]: Start difference. First operand has 86 places, 92 transitions, 771 flow. Second operand 7 states and 122 transitions. [2024-06-21 21:55:46,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 120 transitions, 1103 flow [2024-06-21 21:55:46,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 120 transitions, 1022 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-21 21:55:46,258 INFO L231 Difference]: Finished difference. Result has 88 places, 94 transitions, 786 flow [2024-06-21 21:55:46,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=694, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=786, PETRI_PLACES=88, PETRI_TRANSITIONS=94} [2024-06-21 21:55:46,258 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 46 predicate places. [2024-06-21 21:55:46,258 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 94 transitions, 786 flow [2024-06-21 21:55:46,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 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) [2024-06-21 21:55:46,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:55:46,259 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:55:46,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 21:55:46,259 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)] === [2024-06-21 21:55:46,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:55:46,260 INFO L85 PathProgramCache]: Analyzing trace with hash -372215143, now seen corresponding path program 4 times [2024-06-21 21:55:46,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:55:46,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764978678] [2024-06-21 21:55:46,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:55:46,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:55:46,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:55:48,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:55:48,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:55:48,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764978678] [2024-06-21 21:55:48,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764978678] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:55:48,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:55:48,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:55:48,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130358153] [2024-06-21 21:55:48,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:55:48,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:55:48,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:55:48,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:55:48,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:55:48,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 21:55:48,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 94 transitions, 786 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 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) [2024-06-21 21:55:48,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:55:48,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 21:55:48,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:55:49,668 INFO L124 PetriNetUnfolderBase]: 992/1592 cut-off events. [2024-06-21 21:55:49,669 INFO L125 PetriNetUnfolderBase]: For 12548/12554 co-relation queries the response was YES. [2024-06-21 21:55:49,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7396 conditions, 1592 events. 992/1592 cut-off events. For 12548/12554 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 7549 event pairs, 262 based on Foata normal form. 10/1602 useless extension candidates. Maximal degree in co-relation 7357. Up to 1312 conditions per place. [2024-06-21 21:55:49,679 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 81 selfloop transitions, 37 changer transitions 0/123 dead transitions. [2024-06-21 21:55:49,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 123 transitions, 1124 flow [2024-06-21 21:55:49,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:55:49,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:55:49,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-21 21:55:49,681 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 21:55:49,681 INFO L175 Difference]: Start difference. First operand has 88 places, 94 transitions, 786 flow. Second operand 7 states and 123 transitions. [2024-06-21 21:55:49,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 123 transitions, 1124 flow [2024-06-21 21:55:49,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 123 transitions, 1052 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-21 21:55:49,695 INFO L231 Difference]: Finished difference. Result has 90 places, 96 transitions, 823 flow [2024-06-21 21:55:49,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=714, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=823, PETRI_PLACES=90, PETRI_TRANSITIONS=96} [2024-06-21 21:55:49,696 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 48 predicate places. [2024-06-21 21:55:49,696 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 96 transitions, 823 flow [2024-06-21 21:55:49,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 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) [2024-06-21 21:55:49,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:55:49,696 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:55:49,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 21:55:49,697 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)] === [2024-06-21 21:55:49,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:55:49,697 INFO L85 PathProgramCache]: Analyzing trace with hash -1201333248, now seen corresponding path program 1 times [2024-06-21 21:55:49,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:55:49,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943093409] [2024-06-21 21:55:49,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:55:49,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:55:49,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:55:52,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:55:52,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:55:52,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943093409] [2024-06-21 21:55:52,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943093409] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:55:52,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:55:52,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:55:52,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556591436] [2024-06-21 21:55:52,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:55:52,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:55:52,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:55:52,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:55:52,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:55:52,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 21:55:52,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 96 transitions, 823 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:55:52,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:55:52,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 21:55:52,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:55:53,949 INFO L124 PetriNetUnfolderBase]: 1210/1952 cut-off events. [2024-06-21 21:55:53,949 INFO L125 PetriNetUnfolderBase]: For 18547/18547 co-relation queries the response was YES. [2024-06-21 21:55:53,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9315 conditions, 1952 events. 1210/1952 cut-off events. For 18547/18547 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9897 event pairs, 245 based on Foata normal form. 18/1970 useless extension candidates. Maximal degree in co-relation 9275. Up to 1438 conditions per place. [2024-06-21 21:55:53,962 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 117 selfloop transitions, 31 changer transitions 0/153 dead transitions. [2024-06-21 21:55:53,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 153 transitions, 1393 flow [2024-06-21 21:55:53,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:55:53,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:55:53,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-21 21:55:53,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46612466124661245 [2024-06-21 21:55:53,969 INFO L175 Difference]: Start difference. First operand has 90 places, 96 transitions, 823 flow. Second operand 9 states and 172 transitions. [2024-06-21 21:55:53,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 153 transitions, 1393 flow [2024-06-21 21:55:53,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 153 transitions, 1302 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-21 21:55:53,988 INFO L231 Difference]: Finished difference. Result has 95 places, 102 transitions, 879 flow [2024-06-21 21:55:53,988 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=732, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=879, PETRI_PLACES=95, PETRI_TRANSITIONS=102} [2024-06-21 21:55:53,989 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 53 predicate places. [2024-06-21 21:55:53,989 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 102 transitions, 879 flow [2024-06-21 21:55:53,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:55:53,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:55:53,990 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:55:53,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 21:55:53,990 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)] === [2024-06-21 21:55:53,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:55:53,991 INFO L85 PathProgramCache]: Analyzing trace with hash 1530398016, now seen corresponding path program 2 times [2024-06-21 21:55:53,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:55:53,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436161727] [2024-06-21 21:55:53,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:55:53,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:55:54,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:55:57,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:55:57,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:55:57,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436161727] [2024-06-21 21:55:57,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436161727] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:55:57,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:55:57,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:55:57,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636511318] [2024-06-21 21:55:57,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:55:57,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:55:57,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:55:57,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:55:57,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:55:57,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 21:55:57,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 102 transitions, 879 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:55:57,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:55:57,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 21:55:57,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:55:58,619 INFO L124 PetriNetUnfolderBase]: 1164/1882 cut-off events. [2024-06-21 21:55:58,620 INFO L125 PetriNetUnfolderBase]: For 18818/18818 co-relation queries the response was YES. [2024-06-21 21:55:58,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8931 conditions, 1882 events. 1164/1882 cut-off events. For 18818/18818 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 9459 event pairs, 312 based on Foata normal form. 24/1906 useless extension candidates. Maximal degree in co-relation 8889. Up to 1574 conditions per place. [2024-06-21 21:55:58,636 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 112 selfloop transitions, 27 changer transitions 0/144 dead transitions. [2024-06-21 21:55:58,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 144 transitions, 1306 flow [2024-06-21 21:55:58,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:55:58,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:55:58,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-21 21:55:58,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603658536585366 [2024-06-21 21:55:58,639 INFO L175 Difference]: Start difference. First operand has 95 places, 102 transitions, 879 flow. Second operand 8 states and 151 transitions. [2024-06-21 21:55:58,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 144 transitions, 1306 flow [2024-06-21 21:55:58,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 144 transitions, 1241 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-21 21:55:58,726 INFO L231 Difference]: Finished difference. Result has 98 places, 103 transitions, 899 flow [2024-06-21 21:55:58,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=822, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=899, PETRI_PLACES=98, PETRI_TRANSITIONS=103} [2024-06-21 21:55:58,727 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 56 predicate places. [2024-06-21 21:55:58,727 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 103 transitions, 899 flow [2024-06-21 21:55:58,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:55:58,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:55:58,728 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:55:58,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 21:55:58,728 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)] === [2024-06-21 21:55:58,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:55:58,729 INFO L85 PathProgramCache]: Analyzing trace with hash -226005428, now seen corresponding path program 3 times [2024-06-21 21:55:58,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:55:58,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626618319] [2024-06-21 21:55:58,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:55:58,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:55:58,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:56:02,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:56:02,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:56:02,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626618319] [2024-06-21 21:56:02,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626618319] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:56:02,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:56:02,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:56:02,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785330922] [2024-06-21 21:56:02,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:56:02,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:56:02,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:56:02,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:56:02,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:56:02,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 21:56:02,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 103 transitions, 899 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:56:02,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:56:02,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 21:56:02,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:56:03,397 INFO L124 PetriNetUnfolderBase]: 1232/2006 cut-off events. [2024-06-21 21:56:03,397 INFO L125 PetriNetUnfolderBase]: For 20052/20052 co-relation queries the response was YES. [2024-06-21 21:56:03,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9468 conditions, 2006 events. 1232/2006 cut-off events. For 20052/20052 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 10443 event pairs, 336 based on Foata normal form. 16/2021 useless extension candidates. Maximal degree in co-relation 9424. Up to 1654 conditions per place. [2024-06-21 21:56:03,407 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 100 selfloop transitions, 37 changer transitions 0/142 dead transitions. [2024-06-21 21:56:03,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 142 transitions, 1313 flow [2024-06-21 21:56:03,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:56:03,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:56:03,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-21 21:56:03,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4451219512195122 [2024-06-21 21:56:03,410 INFO L175 Difference]: Start difference. First operand has 98 places, 103 transitions, 899 flow. Second operand 8 states and 146 transitions. [2024-06-21 21:56:03,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 142 transitions, 1313 flow [2024-06-21 21:56:03,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 142 transitions, 1263 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-21 21:56:03,436 INFO L231 Difference]: Finished difference. Result has 100 places, 104 transitions, 950 flow [2024-06-21 21:56:03,436 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=849, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=950, PETRI_PLACES=100, PETRI_TRANSITIONS=104} [2024-06-21 21:56:03,437 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 58 predicate places. [2024-06-21 21:56:03,437 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 104 transitions, 950 flow [2024-06-21 21:56:03,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:56:03,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:56:03,438 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:56:03,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 21:56:03,438 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)] === [2024-06-21 21:56:03,438 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:56:03,438 INFO L85 PathProgramCache]: Analyzing trace with hash 1645873636, now seen corresponding path program 1 times [2024-06-21 21:56:03,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:56:03,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989206938] [2024-06-21 21:56:03,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:56:03,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:56:03,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:56:06,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:56:06,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:56:06,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989206938] [2024-06-21 21:56:06,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989206938] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:56:06,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:56:06,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:56:06,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363799686] [2024-06-21 21:56:06,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:56:06,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:56:06,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:56:06,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:56:06,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:56:06,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 21:56:06,453 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 104 transitions, 950 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:56:06,453 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:56:06,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 21:56:06,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:56:07,575 INFO L124 PetriNetUnfolderBase]: 1280/2102 cut-off events. [2024-06-21 21:56:07,575 INFO L125 PetriNetUnfolderBase]: For 22410/22410 co-relation queries the response was YES. [2024-06-21 21:56:07,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10000 conditions, 2102 events. 1280/2102 cut-off events. For 22410/22410 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 11140 event pairs, 332 based on Foata normal form. 12/2113 useless extension candidates. Maximal degree in co-relation 9955. Up to 1482 conditions per place. [2024-06-21 21:56:07,613 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 101 selfloop transitions, 40 changer transitions 0/146 dead transitions. [2024-06-21 21:56:07,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 146 transitions, 1386 flow [2024-06-21 21:56:07,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:56:07,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:56:07,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-21 21:56:07,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45121951219512196 [2024-06-21 21:56:07,617 INFO L175 Difference]: Start difference. First operand has 100 places, 104 transitions, 950 flow. Second operand 8 states and 148 transitions. [2024-06-21 21:56:07,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 146 transitions, 1386 flow [2024-06-21 21:56:07,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 146 transitions, 1305 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-21 21:56:07,643 INFO L231 Difference]: Finished difference. Result has 102 places, 105 transitions, 978 flow [2024-06-21 21:56:07,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=869, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=978, PETRI_PLACES=102, PETRI_TRANSITIONS=105} [2024-06-21 21:56:07,643 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 60 predicate places. [2024-06-21 21:56:07,644 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 105 transitions, 978 flow [2024-06-21 21:56:07,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:56:07,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:56:07,644 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:56:07,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 21:56:07,644 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)] === [2024-06-21 21:56:07,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:56:07,645 INFO L85 PathProgramCache]: Analyzing trace with hash -1607085828, now seen corresponding path program 4 times [2024-06-21 21:56:07,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:56:07,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455371191] [2024-06-21 21:56:07,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:56:07,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:56:07,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:56:10,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:56:10,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:56:10,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455371191] [2024-06-21 21:56:10,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455371191] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:56:10,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:56:10,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:56:10,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345339890] [2024-06-21 21:56:10,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:56:10,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:56:10,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:56:10,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:56:10,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:56:10,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 21:56:10,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 105 transitions, 978 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:56:10,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:56:10,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 21:56:10,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:56:11,749 INFO L124 PetriNetUnfolderBase]: 1320/2174 cut-off events. [2024-06-21 21:56:11,750 INFO L125 PetriNetUnfolderBase]: For 25152/25152 co-relation queries the response was YES. [2024-06-21 21:56:11,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10338 conditions, 2174 events. 1320/2174 cut-off events. For 25152/25152 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 11691 event pairs, 375 based on Foata normal form. 16/2189 useless extension candidates. Maximal degree in co-relation 10292. Up to 1810 conditions per place. [2024-06-21 21:56:11,760 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 99 selfloop transitions, 36 changer transitions 0/140 dead transitions. [2024-06-21 21:56:11,760 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 140 transitions, 1382 flow [2024-06-21 21:56:11,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:56:11,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:56:11,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-21 21:56:11,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329268292682927 [2024-06-21 21:56:11,761 INFO L175 Difference]: Start difference. First operand has 102 places, 105 transitions, 978 flow. Second operand 8 states and 142 transitions. [2024-06-21 21:56:11,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 140 transitions, 1382 flow [2024-06-21 21:56:11,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 140 transitions, 1304 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-21 21:56:11,782 INFO L231 Difference]: Finished difference. Result has 105 places, 106 transitions, 1003 flow [2024-06-21 21:56:11,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=900, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1003, PETRI_PLACES=105, PETRI_TRANSITIONS=106} [2024-06-21 21:56:11,783 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 63 predicate places. [2024-06-21 21:56:11,783 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 106 transitions, 1003 flow [2024-06-21 21:56:11,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:56:11,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:56:11,783 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:56:11,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 21:56:11,784 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)] === [2024-06-21 21:56:11,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:56:11,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1110058668, now seen corresponding path program 2 times [2024-06-21 21:56:11,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:56:11,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954215980] [2024-06-21 21:56:11,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:56:11,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:56:11,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:56:14,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:56:14,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:56:14,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954215980] [2024-06-21 21:56:14,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954215980] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:56:14,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:56:14,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:56:14,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703405101] [2024-06-21 21:56:14,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:56:14,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:56:14,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:56:14,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:56:14,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:56:14,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 21:56:14,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 106 transitions, 1003 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:56:14,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:56:14,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 21:56:14,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:56:15,802 INFO L124 PetriNetUnfolderBase]: 1368/2270 cut-off events. [2024-06-21 21:56:15,802 INFO L125 PetriNetUnfolderBase]: For 27059/27059 co-relation queries the response was YES. [2024-06-21 21:56:15,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10772 conditions, 2270 events. 1368/2270 cut-off events. For 27059/27059 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 12385 event pairs, 375 based on Foata normal form. 12/2281 useless extension candidates. Maximal degree in co-relation 10725. Up to 1784 conditions per place. [2024-06-21 21:56:15,813 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 103 selfloop transitions, 37 changer transitions 0/145 dead transitions. [2024-06-21 21:56:15,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 145 transitions, 1435 flow [2024-06-21 21:56:15,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:56:15,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:56:15,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-21 21:56:15,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4420731707317073 [2024-06-21 21:56:15,815 INFO L175 Difference]: Start difference. First operand has 105 places, 106 transitions, 1003 flow. Second operand 8 states and 145 transitions. [2024-06-21 21:56:15,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 145 transitions, 1435 flow [2024-06-21 21:56:15,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 145 transitions, 1352 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-21 21:56:15,840 INFO L231 Difference]: Finished difference. Result has 107 places, 107 transitions, 1026 flow [2024-06-21 21:56:15,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=920, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1026, PETRI_PLACES=107, PETRI_TRANSITIONS=107} [2024-06-21 21:56:15,841 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 65 predicate places. [2024-06-21 21:56:15,841 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 107 transitions, 1026 flow [2024-06-21 21:56:15,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:56:15,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:56:15,842 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:56:15,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 21:56:15,842 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)] === [2024-06-21 21:56:15,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:56:15,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1346234028, now seen corresponding path program 3 times [2024-06-21 21:56:15,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:56:15,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281419474] [2024-06-21 21:56:15,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:56:15,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:56:15,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:56:18,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:56:18,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:56:18,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281419474] [2024-06-21 21:56:18,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281419474] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:56:18,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:56:18,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:56:18,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159597475] [2024-06-21 21:56:18,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:56:18,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:56:18,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:56:18,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:56:18,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:56:18,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 21:56:18,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 107 transitions, 1026 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:56:18,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:56:18,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 21:56:18,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:56:19,272 INFO L124 PetriNetUnfolderBase]: 1348/2238 cut-off events. [2024-06-21 21:56:19,273 INFO L125 PetriNetUnfolderBase]: For 26643/26643 co-relation queries the response was YES. [2024-06-21 21:56:19,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10452 conditions, 2238 events. 1348/2238 cut-off events. For 26643/26643 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 12101 event pairs, 310 based on Foata normal form. 12/2249 useless extension candidates. Maximal degree in co-relation 10404. Up to 1250 conditions per place. [2024-06-21 21:56:19,282 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 94 selfloop transitions, 45 changer transitions 0/144 dead transitions. [2024-06-21 21:56:19,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 144 transitions, 1388 flow [2024-06-21 21:56:19,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:56:19,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:56:19,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-21 21:56:19,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-21 21:56:19,284 INFO L175 Difference]: Start difference. First operand has 107 places, 107 transitions, 1026 flow. Second operand 8 states and 144 transitions. [2024-06-21 21:56:19,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 144 transitions, 1388 flow [2024-06-21 21:56:19,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 144 transitions, 1298 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-21 21:56:19,305 INFO L231 Difference]: Finished difference. Result has 108 places, 106 transitions, 990 flow [2024-06-21 21:56:19,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=896, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=990, PETRI_PLACES=108, PETRI_TRANSITIONS=106} [2024-06-21 21:56:19,306 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 66 predicate places. [2024-06-21 21:56:19,306 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 106 transitions, 990 flow [2024-06-21 21:56:19,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:56:19,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:56:19,307 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:56:19,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 21:56:19,307 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:56:19,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:56:19,307 INFO L85 PathProgramCache]: Analyzing trace with hash -1804292201, now seen corresponding path program 1 times [2024-06-21 21:56:19,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:56:19,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087738883] [2024-06-21 21:56:19,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:56:19,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:56:19,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:56:20,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:56:20,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:56:20,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087738883] [2024-06-21 21:56:20,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087738883] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:56:20,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:56:20,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:56:20,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481102961] [2024-06-21 21:56:20,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:56:20,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:56:20,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:56:20,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:56:20,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:56:21,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 21:56:21,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 106 transitions, 990 flow. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:56:21,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:56:21,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 21:56:21,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:56:21,773 INFO L124 PetriNetUnfolderBase]: 1215/2070 cut-off events. [2024-06-21 21:56:21,774 INFO L125 PetriNetUnfolderBase]: For 25216/25216 co-relation queries the response was YES. [2024-06-21 21:56:21,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9736 conditions, 2070 events. 1215/2070 cut-off events. For 25216/25216 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 11656 event pairs, 356 based on Foata normal form. 2/2047 useless extension candidates. Maximal degree in co-relation 9687. Up to 1893 conditions per place. [2024-06-21 21:56:21,788 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 92 selfloop transitions, 10 changer transitions 0/120 dead transitions. [2024-06-21 21:56:21,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 120 transitions, 1242 flow [2024-06-21 21:56:21,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 21:56:21,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 21:56:21,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 88 transitions. [2024-06-21 21:56:21,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4292682926829268 [2024-06-21 21:56:21,789 INFO L175 Difference]: Start difference. First operand has 108 places, 106 transitions, 990 flow. Second operand 5 states and 88 transitions. [2024-06-21 21:56:21,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 120 transitions, 1242 flow [2024-06-21 21:56:21,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 120 transitions, 1134 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-21 21:56:21,818 INFO L231 Difference]: Finished difference. Result has 107 places, 109 transitions, 932 flow [2024-06-21 21:56:21,818 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=882, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=932, PETRI_PLACES=107, PETRI_TRANSITIONS=109} [2024-06-21 21:56:21,818 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 65 predicate places. [2024-06-21 21:56:21,818 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 109 transitions, 932 flow [2024-06-21 21:56:21,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:56:21,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:56:21,819 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:56:21,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 21:56:21,819 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:56:21,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:56:21,820 INFO L85 PathProgramCache]: Analyzing trace with hash -98666642, now seen corresponding path program 1 times [2024-06-21 21:56:21,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:56:21,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255354894] [2024-06-21 21:56:21,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:56:21,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:56:21,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:56:23,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:56:23,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:56:23,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255354894] [2024-06-21 21:56:23,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255354894] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:56:23,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:56:23,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:56:23,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577591054] [2024-06-21 21:56:23,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:56:23,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:56:23,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:56:23,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:56:23,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:56:23,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 21:56:23,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 109 transitions, 932 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) [2024-06-21 21:56:23,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:56:23,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 21:56:23,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:56:24,521 INFO L124 PetriNetUnfolderBase]: 1347/2242 cut-off events. [2024-06-21 21:56:24,521 INFO L125 PetriNetUnfolderBase]: For 25839/25839 co-relation queries the response was YES. [2024-06-21 21:56:24,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10453 conditions, 2242 events. 1347/2242 cut-off events. For 25839/25839 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 12322 event pairs, 373 based on Foata normal form. 1/2242 useless extension candidates. Maximal degree in co-relation 10403. Up to 2102 conditions per place. [2024-06-21 21:56:24,532 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 110 selfloop transitions, 16 changer transitions 0/131 dead transitions. [2024-06-21 21:56:24,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 131 transitions, 1334 flow [2024-06-21 21:56:24,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:56:24,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:56:24,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-06-21 21:56:24,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4105691056910569 [2024-06-21 21:56:24,533 INFO L175 Difference]: Start difference. First operand has 107 places, 109 transitions, 932 flow. Second operand 6 states and 101 transitions. [2024-06-21 21:56:24,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 131 transitions, 1334 flow [2024-06-21 21:56:24,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 131 transitions, 1306 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-21 21:56:24,554 INFO L231 Difference]: Finished difference. Result has 110 places, 115 transitions, 1012 flow [2024-06-21 21:56:24,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=904, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1012, PETRI_PLACES=110, PETRI_TRANSITIONS=115} [2024-06-21 21:56:24,554 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 68 predicate places. [2024-06-21 21:56:24,554 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 115 transitions, 1012 flow [2024-06-21 21:56:24,555 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) [2024-06-21 21:56:24,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:56:24,555 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:56:24,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 21:56:24,555 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:56:24,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:56:24,555 INFO L85 PathProgramCache]: Analyzing trace with hash -53802512, now seen corresponding path program 2 times [2024-06-21 21:56:24,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:56:24,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023276707] [2024-06-21 21:56:24,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:56:24,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:56:24,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:56:26,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:56:26,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:56:26,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023276707] [2024-06-21 21:56:26,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023276707] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:56:26,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:56:26,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:56:26,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092103952] [2024-06-21 21:56:26,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:56:26,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:56:26,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:56:26,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:56:26,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:56:26,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 21:56:26,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 115 transitions, 1012 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) [2024-06-21 21:56:26,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:56:26,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 21:56:26,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:56:27,095 INFO L124 PetriNetUnfolderBase]: 1344/2238 cut-off events. [2024-06-21 21:56:27,095 INFO L125 PetriNetUnfolderBase]: For 28331/28331 co-relation queries the response was YES. [2024-06-21 21:56:27,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10722 conditions, 2238 events. 1344/2238 cut-off events. For 28331/28331 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 12310 event pairs, 373 based on Foata normal form. 1/2238 useless extension candidates. Maximal degree in co-relation 10671. Up to 2102 conditions per place. [2024-06-21 21:56:27,108 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 111 selfloop transitions, 13 changer transitions 0/129 dead transitions. [2024-06-21 21:56:27,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 129 transitions, 1300 flow [2024-06-21 21:56:27,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 21:56:27,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 21:56:27,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 88 transitions. [2024-06-21 21:56:27,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4292682926829268 [2024-06-21 21:56:27,109 INFO L175 Difference]: Start difference. First operand has 110 places, 115 transitions, 1012 flow. Second operand 5 states and 88 transitions. [2024-06-21 21:56:27,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 129 transitions, 1300 flow [2024-06-21 21:56:27,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 129 transitions, 1248 flow, removed 22 selfloop flow, removed 2 redundant places. [2024-06-21 21:56:27,133 INFO L231 Difference]: Finished difference. Result has 113 places, 115 transitions, 996 flow [2024-06-21 21:56:27,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=960, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=996, PETRI_PLACES=113, PETRI_TRANSITIONS=115} [2024-06-21 21:56:27,133 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 71 predicate places. [2024-06-21 21:56:27,133 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 115 transitions, 996 flow [2024-06-21 21:56:27,134 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) [2024-06-21 21:56:27,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:56:27,134 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:56:27,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 21:56:27,134 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:56:27,134 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:56:27,134 INFO L85 PathProgramCache]: Analyzing trace with hash 1848111470, now seen corresponding path program 1 times [2024-06-21 21:56:27,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:56:27,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832154880] [2024-06-21 21:56:27,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:56:27,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:56:27,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:56:29,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:56:29,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:56:29,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832154880] [2024-06-21 21:56:29,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832154880] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:56:29,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:56:29,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:56:29,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817156655] [2024-06-21 21:56:29,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:56:29,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:56:29,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:56:29,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:56:29,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:56:29,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 21:56:29,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 115 transitions, 996 flow. Second operand has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:56:29,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:56:29,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 21:56:29,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:56:30,659 INFO L124 PetriNetUnfolderBase]: 1276/2177 cut-off events. [2024-06-21 21:56:30,659 INFO L125 PetriNetUnfolderBase]: For 31652/31652 co-relation queries the response was YES. [2024-06-21 21:56:30,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10580 conditions, 2177 events. 1276/2177 cut-off events. For 31652/31652 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 12295 event pairs, 347 based on Foata normal form. 4/2165 useless extension candidates. Maximal degree in co-relation 10527. Up to 1896 conditions per place. [2024-06-21 21:56:30,672 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 103 selfloop transitions, 30 changer transitions 0/151 dead transitions. [2024-06-21 21:56:30,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 151 transitions, 1459 flow [2024-06-21 21:56:30,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:56:30,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:56:30,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-21 21:56:30,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42073170731707316 [2024-06-21 21:56:30,673 INFO L175 Difference]: Start difference. First operand has 113 places, 115 transitions, 996 flow. Second operand 8 states and 138 transitions. [2024-06-21 21:56:30,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 151 transitions, 1459 flow [2024-06-21 21:56:30,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 151 transitions, 1433 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-21 21:56:30,698 INFO L231 Difference]: Finished difference. Result has 117 places, 126 transitions, 1124 flow [2024-06-21 21:56:30,699 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=970, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1124, PETRI_PLACES=117, PETRI_TRANSITIONS=126} [2024-06-21 21:56:30,699 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 75 predicate places. [2024-06-21 21:56:30,699 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 126 transitions, 1124 flow [2024-06-21 21:56:30,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:56:30,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:56:30,699 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:56:30,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 21:56:30,699 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:56:30,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:56:30,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1668061100, now seen corresponding path program 2 times [2024-06-21 21:56:30,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:56:30,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354704921] [2024-06-21 21:56:30,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:56:30,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:56:30,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:56:33,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:56:33,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:56:33,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354704921] [2024-06-21 21:56:33,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354704921] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:56:33,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:56:33,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:56:33,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745001090] [2024-06-21 21:56:33,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:56:33,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:56:33,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:56:33,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:56:33,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:56:33,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 21:56:33,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 126 transitions, 1124 flow. Second operand has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:56:33,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:56:33,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 21:56:33,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:56:34,094 INFO L124 PetriNetUnfolderBase]: 1264/2161 cut-off events. [2024-06-21 21:56:34,094 INFO L125 PetriNetUnfolderBase]: For 33561/33561 co-relation queries the response was YES. [2024-06-21 21:56:34,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10837 conditions, 2161 events. 1264/2161 cut-off events. For 33561/33561 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 12242 event pairs, 345 based on Foata normal form. 4/2149 useless extension candidates. Maximal degree in co-relation 10783. Up to 1888 conditions per place. [2024-06-21 21:56:34,108 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 102 selfloop transitions, 27 changer transitions 0/147 dead transitions. [2024-06-21 21:56:34,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 147 transitions, 1444 flow [2024-06-21 21:56:34,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:56:34,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:56:34,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-21 21:56:34,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44715447154471544 [2024-06-21 21:56:34,110 INFO L175 Difference]: Start difference. First operand has 117 places, 126 transitions, 1124 flow. Second operand 6 states and 110 transitions. [2024-06-21 21:56:34,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 147 transitions, 1444 flow [2024-06-21 21:56:34,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 147 transitions, 1400 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-21 21:56:34,134 INFO L231 Difference]: Finished difference. Result has 121 places, 126 transitions, 1146 flow [2024-06-21 21:56:34,135 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1080, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1146, PETRI_PLACES=121, PETRI_TRANSITIONS=126} [2024-06-21 21:56:34,135 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 79 predicate places. [2024-06-21 21:56:34,135 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 126 transitions, 1146 flow [2024-06-21 21:56:34,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:56:34,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:56:34,135 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:56:34,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 21:56:34,136 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:56:34,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:56:34,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1667675150, now seen corresponding path program 3 times [2024-06-21 21:56:34,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:56:34,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169412915] [2024-06-21 21:56:34,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:56:34,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:56:34,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:56:36,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:56:36,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:56:36,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169412915] [2024-06-21 21:56:36,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169412915] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:56:36,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:56:36,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:56:36,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714500621] [2024-06-21 21:56:36,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:56:36,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:56:36,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:56:36,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:56:36,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:56:36,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 21:56:36,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 126 transitions, 1146 flow. Second operand has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:56:36,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:56:36,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 21:56:36,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:56:37,669 INFO L124 PetriNetUnfolderBase]: 1251/2138 cut-off events. [2024-06-21 21:56:37,669 INFO L125 PetriNetUnfolderBase]: For 34929/34930 co-relation queries the response was YES. [2024-06-21 21:56:37,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10758 conditions, 2138 events. 1251/2138 cut-off events. For 34929/34930 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 12102 event pairs, 351 based on Foata normal form. 4/2125 useless extension candidates. Maximal degree in co-relation 10702. Up to 1860 conditions per place. [2024-06-21 21:56:37,682 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 94 selfloop transitions, 31 changer transitions 0/143 dead transitions. [2024-06-21 21:56:37,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 143 transitions, 1464 flow [2024-06-21 21:56:37,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:56:37,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:56:37,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 104 transitions. [2024-06-21 21:56:37,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42276422764227645 [2024-06-21 21:56:37,684 INFO L175 Difference]: Start difference. First operand has 121 places, 126 transitions, 1146 flow. Second operand 6 states and 104 transitions. [2024-06-21 21:56:37,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 143 transitions, 1464 flow [2024-06-21 21:56:37,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 143 transitions, 1403 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-21 21:56:37,714 INFO L231 Difference]: Finished difference. Result has 121 places, 129 transitions, 1187 flow [2024-06-21 21:56:37,715 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1085, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1187, PETRI_PLACES=121, PETRI_TRANSITIONS=129} [2024-06-21 21:56:37,715 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 79 predicate places. [2024-06-21 21:56:37,715 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 129 transitions, 1187 flow [2024-06-21 21:56:37,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:56:37,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:56:37,715 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:56:37,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 21:56:37,716 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:56:37,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:56:37,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1959020598, now seen corresponding path program 1 times [2024-06-21 21:56:37,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:56:37,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239743043] [2024-06-21 21:56:37,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:56:37,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:56:37,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:56:39,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:56:39,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:56:39,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239743043] [2024-06-21 21:56:39,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239743043] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:56:39,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:56:39,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:56:39,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811019314] [2024-06-21 21:56:39,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:56:39,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:56:39,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:56:39,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:56:39,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:56:39,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 21:56:39,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 129 transitions, 1187 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:56:39,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:56:39,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 21:56:39,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:56:41,029 INFO L124 PetriNetUnfolderBase]: 1392/2312 cut-off events. [2024-06-21 21:56:41,029 INFO L125 PetriNetUnfolderBase]: For 35379/35379 co-relation queries the response was YES. [2024-06-21 21:56:41,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11835 conditions, 2312 events. 1392/2312 cut-off events. For 35379/35379 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 12721 event pairs, 370 based on Foata normal form. 2/2313 useless extension candidates. Maximal degree in co-relation 11779. Up to 2142 conditions per place. [2024-06-21 21:56:41,042 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 127 selfloop transitions, 23 changer transitions 0/155 dead transitions. [2024-06-21 21:56:41,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 155 transitions, 1653 flow [2024-06-21 21:56:41,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:56:41,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:56:41,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-21 21:56:41,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41114982578397213 [2024-06-21 21:56:41,044 INFO L175 Difference]: Start difference. First operand has 121 places, 129 transitions, 1187 flow. Second operand 7 states and 118 transitions. [2024-06-21 21:56:41,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 155 transitions, 1653 flow [2024-06-21 21:56:41,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 155 transitions, 1573 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-21 21:56:41,081 INFO L231 Difference]: Finished difference. Result has 124 places, 135 transitions, 1229 flow [2024-06-21 21:56:41,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1107, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1229, PETRI_PLACES=124, PETRI_TRANSITIONS=135} [2024-06-21 21:56:41,082 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 82 predicate places. [2024-06-21 21:56:41,082 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 135 transitions, 1229 flow [2024-06-21 21:56:41,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:56:41,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:56:41,083 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:56:41,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 21:56:41,083 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:56:41,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:56:41,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1667876588, now seen corresponding path program 2 times [2024-06-21 21:56:41,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:56:41,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883041707] [2024-06-21 21:56:41,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:56:41,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:56:41,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:56:43,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:56:43,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:56:43,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883041707] [2024-06-21 21:56:43,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883041707] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:56:43,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:56:43,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:56:43,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844826934] [2024-06-21 21:56:43,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:56:43,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:56:43,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:56:43,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:56:43,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:56:43,184 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 21:56:43,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 135 transitions, 1229 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:56:43,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:56:43,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 21:56:43,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:56:44,093 INFO L124 PetriNetUnfolderBase]: 1402/2330 cut-off events. [2024-06-21 21:56:44,093 INFO L125 PetriNetUnfolderBase]: For 38241/38241 co-relation queries the response was YES. [2024-06-21 21:56:44,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12137 conditions, 2330 events. 1402/2330 cut-off events. For 38241/38241 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 12825 event pairs, 369 based on Foata normal form. 2/2331 useless extension candidates. Maximal degree in co-relation 12080. Up to 2161 conditions per place. [2024-06-21 21:56:44,106 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 131 selfloop transitions, 21 changer transitions 0/157 dead transitions. [2024-06-21 21:56:44,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 157 transitions, 1673 flow [2024-06-21 21:56:44,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:56:44,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:56:44,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-21 21:56:44,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43089430894308944 [2024-06-21 21:56:44,107 INFO L175 Difference]: Start difference. First operand has 124 places, 135 transitions, 1229 flow. Second operand 6 states and 106 transitions. [2024-06-21 21:56:44,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 157 transitions, 1673 flow [2024-06-21 21:56:44,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 157 transitions, 1629 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-21 21:56:44,142 INFO L231 Difference]: Finished difference. Result has 127 places, 138 transitions, 1271 flow [2024-06-21 21:56:44,142 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1187, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1271, PETRI_PLACES=127, PETRI_TRANSITIONS=138} [2024-06-21 21:56:44,143 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 85 predicate places. [2024-06-21 21:56:44,143 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 138 transitions, 1271 flow [2024-06-21 21:56:44,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:56:44,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:56:44,143 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:56:44,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 21:56:44,144 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:56:44,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:56:44,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1667669198, now seen corresponding path program 3 times [2024-06-21 21:56:44,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:56:44,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57443681] [2024-06-21 21:56:44,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:56:44,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:56:44,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:56:46,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:56:46,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:56:46,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57443681] [2024-06-21 21:56:46,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57443681] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:56:46,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:56:46,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:56:46,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724552274] [2024-06-21 21:56:46,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:56:46,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:56:46,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:56:46,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:56:46,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:56:46,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 21:56:46,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 138 transitions, 1271 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:56:46,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:56:46,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 21:56:46,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:56:47,295 INFO L124 PetriNetUnfolderBase]: 1396/2322 cut-off events. [2024-06-21 21:56:47,295 INFO L125 PetriNetUnfolderBase]: For 39817/39817 co-relation queries the response was YES. [2024-06-21 21:56:47,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12157 conditions, 2322 events. 1396/2322 cut-off events. For 39817/39817 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 12758 event pairs, 367 based on Foata normal form. 2/2323 useless extension candidates. Maximal degree in co-relation 12098. Up to 2156 conditions per place. [2024-06-21 21:56:47,315 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 131 selfloop transitions, 22 changer transitions 0/158 dead transitions. [2024-06-21 21:56:47,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 158 transitions, 1629 flow [2024-06-21 21:56:47,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:56:47,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:56:47,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-21 21:56:47,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3871951219512195 [2024-06-21 21:56:47,317 INFO L175 Difference]: Start difference. First operand has 127 places, 138 transitions, 1271 flow. Second operand 8 states and 127 transitions. [2024-06-21 21:56:47,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 158 transitions, 1629 flow [2024-06-21 21:56:47,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 158 transitions, 1553 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-21 21:56:47,375 INFO L231 Difference]: Finished difference. Result has 131 places, 138 transitions, 1245 flow [2024-06-21 21:56:47,375 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1195, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1245, PETRI_PLACES=131, PETRI_TRANSITIONS=138} [2024-06-21 21:56:47,376 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 89 predicate places. [2024-06-21 21:56:47,376 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 138 transitions, 1245 flow [2024-06-21 21:56:47,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:56:47,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:56:47,377 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:56:47,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 21:56:47,377 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:56:47,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:56:47,377 INFO L85 PathProgramCache]: Analyzing trace with hash -1667661262, now seen corresponding path program 1 times [2024-06-21 21:56:47,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:56:47,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230709621] [2024-06-21 21:56:47,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:56:47,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:56:47,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:56:50,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:56:50,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:56:50,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230709621] [2024-06-21 21:56:50,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230709621] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:56:50,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:56:50,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:56:50,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93692365] [2024-06-21 21:56:50,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:56:50,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:56:50,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:56:50,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:56:50,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:56:50,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 21:56:50,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 138 transitions, 1245 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:56:50,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:56:50,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 21:56:50,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:56:51,494 INFO L124 PetriNetUnfolderBase]: 1252/2152 cut-off events. [2024-06-21 21:56:51,494 INFO L125 PetriNetUnfolderBase]: For 40490/40490 co-relation queries the response was YES. [2024-06-21 21:56:51,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11341 conditions, 2152 events. 1252/2152 cut-off events. For 40490/40490 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 12222 event pairs, 348 based on Foata normal form. 2/2137 useless extension candidates. Maximal degree in co-relation 11281. Up to 1938 conditions per place. [2024-06-21 21:56:51,509 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 123 selfloop transitions, 12 changer transitions 0/153 dead transitions. [2024-06-21 21:56:51,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 153 transitions, 1577 flow [2024-06-21 21:56:51,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:56:51,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:56:51,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-06-21 21:56:51,510 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4105691056910569 [2024-06-21 21:56:51,510 INFO L175 Difference]: Start difference. First operand has 131 places, 138 transitions, 1245 flow. Second operand 6 states and 101 transitions. [2024-06-21 21:56:51,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 153 transitions, 1577 flow [2024-06-21 21:56:51,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 153 transitions, 1513 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-21 21:56:51,547 INFO L231 Difference]: Finished difference. Result has 130 places, 140 transitions, 1242 flow [2024-06-21 21:56:51,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1181, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1242, PETRI_PLACES=130, PETRI_TRANSITIONS=140} [2024-06-21 21:56:51,547 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 88 predicate places. [2024-06-21 21:56:51,548 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 140 transitions, 1242 flow [2024-06-21 21:56:51,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:56:51,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:56:51,548 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:56:51,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 21:56:51,549 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:56:51,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:56:51,549 INFO L85 PathProgramCache]: Analyzing trace with hash -606500531, now seen corresponding path program 1 times [2024-06-21 21:56:51,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:56:51,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369684167] [2024-06-21 21:56:51,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:56:51,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:56:51,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:56:54,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:56:54,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:56:54,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369684167] [2024-06-21 21:56:54,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369684167] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:56:54,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:56:54,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:56:54,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332275008] [2024-06-21 21:56:54,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:56:54,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:56:54,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:56:54,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:56:54,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:56:54,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 21:56:54,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 140 transitions, 1242 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:56:54,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:56:54,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 21:56:54,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:56:55,674 INFO L124 PetriNetUnfolderBase]: 1404/2332 cut-off events. [2024-06-21 21:56:55,674 INFO L125 PetriNetUnfolderBase]: For 43858/43858 co-relation queries the response was YES. [2024-06-21 21:56:55,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12350 conditions, 2332 events. 1404/2332 cut-off events. For 43858/43858 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 12777 event pairs, 366 based on Foata normal form. 1/2332 useless extension candidates. Maximal degree in co-relation 12289. Up to 2088 conditions per place. [2024-06-21 21:56:55,689 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 126 selfloop transitions, 44 changer transitions 0/175 dead transitions. [2024-06-21 21:56:55,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 175 transitions, 1892 flow [2024-06-21 21:56:55,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:56:55,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:56:55,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-21 21:56:55,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4355400696864111 [2024-06-21 21:56:55,690 INFO L175 Difference]: Start difference. First operand has 130 places, 140 transitions, 1242 flow. Second operand 7 states and 125 transitions. [2024-06-21 21:56:55,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 175 transitions, 1892 flow [2024-06-21 21:56:55,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 175 transitions, 1847 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-21 21:56:55,735 INFO L231 Difference]: Finished difference. Result has 133 places, 149 transitions, 1419 flow [2024-06-21 21:56:55,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1197, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1419, PETRI_PLACES=133, PETRI_TRANSITIONS=149} [2024-06-21 21:56:55,736 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 91 predicate places. [2024-06-21 21:56:55,736 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 149 transitions, 1419 flow [2024-06-21 21:56:55,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:56:55,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:56:55,736 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:56:55,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 21:56:55,737 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:56:55,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:56:55,737 INFO L85 PathProgramCache]: Analyzing trace with hash -601738931, now seen corresponding path program 2 times [2024-06-21 21:56:55,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:56:55,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219952582] [2024-06-21 21:56:55,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:56:55,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:56:55,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:56:58,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:56:58,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:56:58,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219952582] [2024-06-21 21:56:58,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219952582] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:56:58,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:56:58,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:56:58,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238721916] [2024-06-21 21:56:58,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:56:58,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:56:58,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:56:58,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:56:58,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:56:58,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 21:56:58,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 149 transitions, 1419 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:56:58,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:56:58,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 21:56:58,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:56:59,531 INFO L124 PetriNetUnfolderBase]: 1414/2354 cut-off events. [2024-06-21 21:56:59,531 INFO L125 PetriNetUnfolderBase]: For 47678/47678 co-relation queries the response was YES. [2024-06-21 21:56:59,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12832 conditions, 2354 events. 1414/2354 cut-off events. For 47678/47678 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 12954 event pairs, 359 based on Foata normal form. 1/2355 useless extension candidates. Maximal degree in co-relation 12770. Up to 2140 conditions per place. [2024-06-21 21:56:59,546 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 142 selfloop transitions, 30 changer transitions 0/177 dead transitions. [2024-06-21 21:56:59,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 177 transitions, 1905 flow [2024-06-21 21:56:59,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:56:59,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:56:59,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-21 21:56:59,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-21 21:56:59,548 INFO L175 Difference]: Start difference. First operand has 133 places, 149 transitions, 1419 flow. Second operand 7 states and 119 transitions. [2024-06-21 21:56:59,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 177 transitions, 1905 flow [2024-06-21 21:56:59,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 177 transitions, 1829 flow, removed 31 selfloop flow, removed 2 redundant places. [2024-06-21 21:56:59,599 INFO L231 Difference]: Finished difference. Result has 138 places, 155 transitions, 1496 flow [2024-06-21 21:56:59,599 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1353, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1496, PETRI_PLACES=138, PETRI_TRANSITIONS=155} [2024-06-21 21:56:59,600 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 96 predicate places. [2024-06-21 21:56:59,600 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 155 transitions, 1496 flow [2024-06-21 21:56:59,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:56:59,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:56:59,600 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:56:59,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 21:56:59,600 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:56:59,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:56:59,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1862013257, now seen corresponding path program 3 times [2024-06-21 21:56:59,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:56:59,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841754066] [2024-06-21 21:56:59,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:56:59,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:56:59,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:57:02,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:57:02,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:57:02,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841754066] [2024-06-21 21:57:02,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841754066] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:57:02,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:57:02,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:57:02,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592528821] [2024-06-21 21:57:02,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:57:02,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:57:02,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:57:02,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:57:02,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:57:02,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 21:57:02,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 155 transitions, 1496 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:57:02,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:57:02,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 21:57:02,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:57:03,353 INFO L124 PetriNetUnfolderBase]: 1419/2363 cut-off events. [2024-06-21 21:57:03,354 INFO L125 PetriNetUnfolderBase]: For 50678/50684 co-relation queries the response was YES. [2024-06-21 21:57:03,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12956 conditions, 2363 events. 1419/2363 cut-off events. For 50678/50684 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 13014 event pairs, 368 based on Foata normal form. 7/2370 useless extension candidates. Maximal degree in co-relation 12892. Up to 2107 conditions per place. [2024-06-21 21:57:03,370 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 127 selfloop transitions, 49 changer transitions 0/181 dead transitions. [2024-06-21 21:57:03,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 181 transitions, 2080 flow [2024-06-21 21:57:03,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:57:03,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:57:03,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-21 21:57:03,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42160278745644597 [2024-06-21 21:57:03,372 INFO L175 Difference]: Start difference. First operand has 138 places, 155 transitions, 1496 flow. Second operand 7 states and 121 transitions. [2024-06-21 21:57:03,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 181 transitions, 2080 flow [2024-06-21 21:57:03,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 181 transitions, 2004 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-21 21:57:03,422 INFO L231 Difference]: Finished difference. Result has 140 places, 158 transitions, 1565 flow [2024-06-21 21:57:03,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1420, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1565, PETRI_PLACES=140, PETRI_TRANSITIONS=158} [2024-06-21 21:57:03,423 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 98 predicate places. [2024-06-21 21:57:03,423 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 158 transitions, 1565 flow [2024-06-21 21:57:03,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:57:03,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:57:03,423 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:57:03,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 21:57:03,423 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:57:03,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:57:03,424 INFO L85 PathProgramCache]: Analyzing trace with hash 600084813, now seen corresponding path program 4 times [2024-06-21 21:57:03,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:57:03,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622915373] [2024-06-21 21:57:03,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:57:03,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:57:03,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:57:05,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:57:05,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:57:05,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622915373] [2024-06-21 21:57:05,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622915373] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:57:05,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:57:05,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:57:05,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735355229] [2024-06-21 21:57:05,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:57:05,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:57:05,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:57:05,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:57:05,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:57:05,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 21:57:05,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 158 transitions, 1565 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:57:05,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:57:05,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 21:57:05,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:57:07,000 INFO L124 PetriNetUnfolderBase]: 1424/2370 cut-off events. [2024-06-21 21:57:07,000 INFO L125 PetriNetUnfolderBase]: For 53419/53425 co-relation queries the response was YES. [2024-06-21 21:57:07,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13162 conditions, 2370 events. 1424/2370 cut-off events. For 53419/53425 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 13063 event pairs, 368 based on Foata normal form. 7/2377 useless extension candidates. Maximal degree in co-relation 13097. Up to 2113 conditions per place. [2024-06-21 21:57:07,015 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 120 selfloop transitions, 54 changer transitions 0/179 dead transitions. [2024-06-21 21:57:07,015 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 179 transitions, 2075 flow [2024-06-21 21:57:07,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:57:07,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:57:07,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-21 21:57:07,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40418118466898956 [2024-06-21 21:57:07,017 INFO L175 Difference]: Start difference. First operand has 140 places, 158 transitions, 1565 flow. Second operand 7 states and 116 transitions. [2024-06-21 21:57:07,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 179 transitions, 2075 flow [2024-06-21 21:57:07,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 179 transitions, 1917 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-21 21:57:07,079 INFO L231 Difference]: Finished difference. Result has 141 places, 161 transitions, 1567 flow [2024-06-21 21:57:07,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1417, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1567, PETRI_PLACES=141, PETRI_TRANSITIONS=161} [2024-06-21 21:57:07,080 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 99 predicate places. [2024-06-21 21:57:07,080 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 161 transitions, 1567 flow [2024-06-21 21:57:07,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:57:07,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:57:07,080 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:57:07,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 21:57:07,081 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:57:07,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:57:07,081 INFO L85 PathProgramCache]: Analyzing trace with hash -2030744363, now seen corresponding path program 5 times [2024-06-21 21:57:07,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:57:07,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322354254] [2024-06-21 21:57:07,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:57:07,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:57:07,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:57:09,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:57:09,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:57:09,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322354254] [2024-06-21 21:57:09,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322354254] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:57:09,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:57:09,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:57:09,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837662430] [2024-06-21 21:57:09,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:57:09,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:57:09,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:57:09,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:57:09,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:57:09,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 21:57:09,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 161 transitions, 1567 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:57:09,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:57:09,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 21:57:09,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:57:10,750 INFO L124 PetriNetUnfolderBase]: 1421/2364 cut-off events. [2024-06-21 21:57:10,751 INFO L125 PetriNetUnfolderBase]: For 54896/54896 co-relation queries the response was YES. [2024-06-21 21:57:10,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13101 conditions, 2364 events. 1421/2364 cut-off events. For 54896/54896 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 13023 event pairs, 359 based on Foata normal form. 1/2365 useless extension candidates. Maximal degree in co-relation 13036. Up to 2076 conditions per place. [2024-06-21 21:57:10,767 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 131 selfloop transitions, 60 changer transitions 0/196 dead transitions. [2024-06-21 21:57:10,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 196 transitions, 2119 flow [2024-06-21 21:57:10,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:57:10,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:57:10,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-21 21:57:10,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4451219512195122 [2024-06-21 21:57:10,769 INFO L175 Difference]: Start difference. First operand has 141 places, 161 transitions, 1567 flow. Second operand 8 states and 146 transitions. [2024-06-21 21:57:10,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 196 transitions, 2119 flow [2024-06-21 21:57:10,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 196 transitions, 2003 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-21 21:57:10,825 INFO L231 Difference]: Finished difference. Result has 145 places, 161 transitions, 1604 flow [2024-06-21 21:57:10,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1451, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1604, PETRI_PLACES=145, PETRI_TRANSITIONS=161} [2024-06-21 21:57:10,826 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 103 predicate places. [2024-06-21 21:57:10,826 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 161 transitions, 1604 flow [2024-06-21 21:57:10,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:57:10,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:57:10,827 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:57:10,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 21:57:10,827 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:57:10,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:57:10,827 INFO L85 PathProgramCache]: Analyzing trace with hash -1215786057, now seen corresponding path program 6 times [2024-06-21 21:57:10,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:57:10,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709244397] [2024-06-21 21:57:10,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:57:10,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:57:10,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:57:13,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:57:13,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:57:13,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709244397] [2024-06-21 21:57:13,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709244397] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:57:13,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:57:13,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:57:13,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389700255] [2024-06-21 21:57:13,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:57:13,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:57:13,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:57:13,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:57:13,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:57:13,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 21:57:13,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 161 transitions, 1604 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:57:13,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:57:13,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 21:57:13,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:57:14,057 INFO L124 PetriNetUnfolderBase]: 1418/2356 cut-off events. [2024-06-21 21:57:14,057 INFO L125 PetriNetUnfolderBase]: For 58004/58004 co-relation queries the response was YES. [2024-06-21 21:57:14,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13206 conditions, 2356 events. 1418/2356 cut-off events. For 58004/58004 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 12945 event pairs, 379 based on Foata normal form. 1/2356 useless extension candidates. Maximal degree in co-relation 13140. Up to 2073 conditions per place. [2024-06-21 21:57:14,073 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 118 selfloop transitions, 58 changer transitions 0/181 dead transitions. [2024-06-21 21:57:14,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 181 transitions, 2018 flow [2024-06-21 21:57:14,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:57:14,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:57:14,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 109 transitions. [2024-06-21 21:57:14,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44308943089430897 [2024-06-21 21:57:14,075 INFO L175 Difference]: Start difference. First operand has 145 places, 161 transitions, 1604 flow. Second operand 6 states and 109 transitions. [2024-06-21 21:57:14,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 181 transitions, 2018 flow [2024-06-21 21:57:14,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 181 transitions, 1827 flow, removed 11 selfloop flow, removed 9 redundant places. [2024-06-21 21:57:14,138 INFO L231 Difference]: Finished difference. Result has 142 places, 161 transitions, 1542 flow [2024-06-21 21:57:14,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1413, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1542, PETRI_PLACES=142, PETRI_TRANSITIONS=161} [2024-06-21 21:57:14,138 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 100 predicate places. [2024-06-21 21:57:14,138 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 161 transitions, 1542 flow [2024-06-21 21:57:14,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:57:14,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:57:14,139 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:57:14,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 21:57:14,139 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:57:14,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:57:14,139 INFO L85 PathProgramCache]: Analyzing trace with hash -329444401, now seen corresponding path program 1 times [2024-06-21 21:57:14,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:57:14,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298797393] [2024-06-21 21:57:14,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:57:14,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:57:14,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:57:16,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:57:16,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:57:16,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298797393] [2024-06-21 21:57:16,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298797393] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:57:16,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:57:16,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:57:16,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762135426] [2024-06-21 21:57:16,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:57:16,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:57:16,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:57:16,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:57:16,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:57:16,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 21:57:16,226 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 161 transitions, 1542 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:57:16,226 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:57:16,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 21:57:16,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:57:17,144 INFO L124 PetriNetUnfolderBase]: 1426/2364 cut-off events. [2024-06-21 21:57:17,144 INFO L125 PetriNetUnfolderBase]: For 55308/55308 co-relation queries the response was YES. [2024-06-21 21:57:17,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13135 conditions, 2364 events. 1426/2364 cut-off events. For 55308/55308 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 12989 event pairs, 331 based on Foata normal form. 2/2365 useless extension candidates. Maximal degree in co-relation 13069. Up to 2175 conditions per place. [2024-06-21 21:57:17,159 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 162 selfloop transitions, 21 changer transitions 0/188 dead transitions. [2024-06-21 21:57:17,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 188 transitions, 2100 flow [2024-06-21 21:57:17,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:57:17,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:57:17,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-21 21:57:17,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41114982578397213 [2024-06-21 21:57:17,161 INFO L175 Difference]: Start difference. First operand has 142 places, 161 transitions, 1542 flow. Second operand 7 states and 118 transitions. [2024-06-21 21:57:17,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 188 transitions, 2100 flow [2024-06-21 21:57:17,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 188 transitions, 1973 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-21 21:57:17,209 INFO L231 Difference]: Finished difference. Result has 143 places, 165 transitions, 1532 flow [2024-06-21 21:57:17,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1417, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1532, PETRI_PLACES=143, PETRI_TRANSITIONS=165} [2024-06-21 21:57:17,209 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 101 predicate places. [2024-06-21 21:57:17,209 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 165 transitions, 1532 flow [2024-06-21 21:57:17,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:57:17,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:57:17,210 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:57:17,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 21:57:17,210 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:57:17,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:57:17,210 INFO L85 PathProgramCache]: Analyzing trace with hash -1851529801, now seen corresponding path program 2 times [2024-06-21 21:57:17,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:57:17,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971395026] [2024-06-21 21:57:17,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:57:17,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:57:17,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:57:19,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:57:19,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:57:19,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971395026] [2024-06-21 21:57:19,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971395026] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:57:19,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:57:19,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:57:19,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027466569] [2024-06-21 21:57:19,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:57:19,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:57:19,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:57:19,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:57:19,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:57:19,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 21:57:19,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 165 transitions, 1532 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:57:19,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:57:19,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 21:57:19,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:57:20,406 INFO L124 PetriNetUnfolderBase]: 1434/2383 cut-off events. [2024-06-21 21:57:20,406 INFO L125 PetriNetUnfolderBase]: For 55301/55301 co-relation queries the response was YES. [2024-06-21 21:57:20,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13175 conditions, 2383 events. 1434/2383 cut-off events. For 55301/55301 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 13186 event pairs, 369 based on Foata normal form. 2/2384 useless extension candidates. Maximal degree in co-relation 13109. Up to 2222 conditions per place. [2024-06-21 21:57:20,423 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 161 selfloop transitions, 18 changer transitions 0/184 dead transitions. [2024-06-21 21:57:20,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 184 transitions, 1972 flow [2024-06-21 21:57:20,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:57:20,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:57:20,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-21 21:57:20,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-21 21:57:20,424 INFO L175 Difference]: Start difference. First operand has 143 places, 165 transitions, 1532 flow. Second operand 7 states and 112 transitions. [2024-06-21 21:57:20,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 184 transitions, 1972 flow [2024-06-21 21:57:20,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 184 transitions, 1906 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-06-21 21:57:20,479 INFO L231 Difference]: Finished difference. Result has 147 places, 167 transitions, 1547 flow [2024-06-21 21:57:20,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1476, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1547, PETRI_PLACES=147, PETRI_TRANSITIONS=167} [2024-06-21 21:57:20,480 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 105 predicate places. [2024-06-21 21:57:20,480 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 167 transitions, 1547 flow [2024-06-21 21:57:20,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:57:20,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:57:20,480 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:57:20,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 21:57:20,481 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:57:20,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:57:20,481 INFO L85 PathProgramCache]: Analyzing trace with hash -164570321, now seen corresponding path program 3 times [2024-06-21 21:57:20,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:57:20,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681569721] [2024-06-21 21:57:20,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:57:20,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:57:20,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:57:22,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:57:22,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:57:22,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681569721] [2024-06-21 21:57:22,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681569721] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:57:22,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:57:22,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:57:22,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586876063] [2024-06-21 21:57:22,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:57:22,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:57:22,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:57:22,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:57:22,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:57:22,609 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 21:57:22,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 167 transitions, 1547 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:57:22,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:57:22,610 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 21:57:22,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:57:23,546 INFO L124 PetriNetUnfolderBase]: 1429/2369 cut-off events. [2024-06-21 21:57:23,546 INFO L125 PetriNetUnfolderBase]: For 56942/56942 co-relation queries the response was YES. [2024-06-21 21:57:23,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13107 conditions, 2369 events. 1429/2369 cut-off events. For 56942/56942 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 13017 event pairs, 330 based on Foata normal form. 2/2370 useless extension candidates. Maximal degree in co-relation 13039. Up to 2196 conditions per place. [2024-06-21 21:57:23,560 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 165 selfloop transitions, 17 changer transitions 0/187 dead transitions. [2024-06-21 21:57:23,561 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 187 transitions, 1967 flow [2024-06-21 21:57:23,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:57:23,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:57:23,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-21 21:57:23,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-21 21:57:23,562 INFO L175 Difference]: Start difference. First operand has 147 places, 167 transitions, 1547 flow. Second operand 6 states and 105 transitions. [2024-06-21 21:57:23,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 187 transitions, 1967 flow [2024-06-21 21:57:23,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 187 transitions, 1900 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-21 21:57:23,623 INFO L231 Difference]: Finished difference. Result has 148 places, 167 transitions, 1522 flow [2024-06-21 21:57:23,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1480, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1522, PETRI_PLACES=148, PETRI_TRANSITIONS=167} [2024-06-21 21:57:23,623 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 106 predicate places. [2024-06-21 21:57:23,624 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 167 transitions, 1522 flow [2024-06-21 21:57:23,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:57:23,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:57:23,624 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:57:23,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 21:57:23,624 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:57:23,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:57:23,625 INFO L85 PathProgramCache]: Analyzing trace with hash -1483271634, now seen corresponding path program 1 times [2024-06-21 21:57:23,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:57:23,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436035038] [2024-06-21 21:57:23,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:57:23,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:57:23,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:57:26,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:57:26,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:57:26,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436035038] [2024-06-21 21:57:26,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436035038] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:57:26,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:57:26,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:57:26,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088111385] [2024-06-21 21:57:26,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:57:26,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:57:26,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:57:26,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:57:26,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:57:26,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 21:57:26,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 167 transitions, 1522 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:57:26,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:57:26,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 21:57:26,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:57:27,886 INFO L124 PetriNetUnfolderBase]: 1434/2384 cut-off events. [2024-06-21 21:57:27,887 INFO L125 PetriNetUnfolderBase]: For 58937/58937 co-relation queries the response was YES. [2024-06-21 21:57:27,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13219 conditions, 2384 events. 1434/2384 cut-off events. For 58937/58937 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 13172 event pairs, 355 based on Foata normal form. 1/2385 useless extension candidates. Maximal degree in co-relation 13150. Up to 2156 conditions per place. [2024-06-21 21:57:27,900 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 162 selfloop transitions, 36 changer transitions 0/203 dead transitions. [2024-06-21 21:57:27,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 203 transitions, 2060 flow [2024-06-21 21:57:27,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:57:27,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:57:27,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-21 21:57:27,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329268292682927 [2024-06-21 21:57:27,902 INFO L175 Difference]: Start difference. First operand has 148 places, 167 transitions, 1522 flow. Second operand 8 states and 142 transitions. [2024-06-21 21:57:27,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 203 transitions, 2060 flow [2024-06-21 21:57:27,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 203 transitions, 2019 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-21 21:57:27,959 INFO L231 Difference]: Finished difference. Result has 151 places, 170 transitions, 1611 flow [2024-06-21 21:57:27,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1481, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1611, PETRI_PLACES=151, PETRI_TRANSITIONS=170} [2024-06-21 21:57:27,960 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 109 predicate places. [2024-06-21 21:57:27,960 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 170 transitions, 1611 flow [2024-06-21 21:57:27,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:57:27,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:57:27,960 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:57:27,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 21:57:27,960 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:57:27,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:57:27,961 INFO L85 PathProgramCache]: Analyzing trace with hash -1621915104, now seen corresponding path program 2 times [2024-06-21 21:57:27,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:57:27,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716525445] [2024-06-21 21:57:27,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:57:27,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:57:27,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:57:31,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:57:31,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:57:31,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716525445] [2024-06-21 21:57:31,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716525445] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:57:31,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:57:31,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:57:31,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158207586] [2024-06-21 21:57:31,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:57:31,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:57:31,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:57:31,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:57:31,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:57:31,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 21:57:31,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 170 transitions, 1611 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:57:31,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:57:31,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 21:57:31,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:57:32,448 INFO L124 PetriNetUnfolderBase]: 1447/2400 cut-off events. [2024-06-21 21:57:32,449 INFO L125 PetriNetUnfolderBase]: For 64189/64189 co-relation queries the response was YES. [2024-06-21 21:57:32,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13819 conditions, 2400 events. 1447/2400 cut-off events. For 64189/64189 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 13265 event pairs, 362 based on Foata normal form. 1/2400 useless extension candidates. Maximal degree in co-relation 13749. Up to 2037 conditions per place. [2024-06-21 21:57:32,465 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 131 selfloop transitions, 75 changer transitions 0/211 dead transitions. [2024-06-21 21:57:32,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 211 transitions, 2415 flow [2024-06-21 21:57:32,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:57:32,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:57:32,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-21 21:57:32,467 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-21 21:57:32,467 INFO L175 Difference]: Start difference. First operand has 151 places, 170 transitions, 1611 flow. Second operand 8 states and 144 transitions. [2024-06-21 21:57:32,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 211 transitions, 2415 flow [2024-06-21 21:57:32,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 211 transitions, 2307 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-21 21:57:32,546 INFO L231 Difference]: Finished difference. Result has 153 places, 179 transitions, 1821 flow [2024-06-21 21:57:32,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1503, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1821, PETRI_PLACES=153, PETRI_TRANSITIONS=179} [2024-06-21 21:57:32,546 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 111 predicate places. [2024-06-21 21:57:32,546 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 179 transitions, 1821 flow [2024-06-21 21:57:32,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:57:32,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:57:32,547 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:57:32,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 21:57:32,547 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)] === [2024-06-21 21:57:32,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:57:32,547 INFO L85 PathProgramCache]: Analyzing trace with hash 523743926, now seen corresponding path program 3 times [2024-06-21 21:57:32,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:57:32,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208431400] [2024-06-21 21:57:32,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:57:32,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:57:32,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:57:35,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:57:35,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:57:35,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208431400] [2024-06-21 21:57:35,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208431400] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:57:35,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:57:35,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:57:35,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071411764] [2024-06-21 21:57:35,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:57:35,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:57:35,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:57:35,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:57:35,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:57:35,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 21:57:35,672 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 179 transitions, 1821 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:57:35,672 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:57:35,672 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 21:57:35,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:57:37,192 INFO L124 PetriNetUnfolderBase]: 1452/2409 cut-off events. [2024-06-21 21:57:37,192 INFO L125 PetriNetUnfolderBase]: For 69393/69393 co-relation queries the response was YES. [2024-06-21 21:57:37,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14322 conditions, 2409 events. 1452/2409 cut-off events. For 69393/69393 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 13303 event pairs, 362 based on Foata normal form. 1/2409 useless extension candidates. Maximal degree in co-relation 14251. Up to 2043 conditions per place. [2024-06-21 21:57:37,210 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 128 selfloop transitions, 77 changer transitions 0/210 dead transitions. [2024-06-21 21:57:37,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 210 transitions, 2517 flow [2024-06-21 21:57:37,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:57:37,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:57:37,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-21 21:57:37,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-21 21:57:37,212 INFO L175 Difference]: Start difference. First operand has 153 places, 179 transitions, 1821 flow. Second operand 8 states and 140 transitions. [2024-06-21 21:57:37,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 210 transitions, 2517 flow [2024-06-21 21:57:37,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 210 transitions, 2380 flow, removed 45 selfloop flow, removed 3 redundant places. [2024-06-21 21:57:37,304 INFO L231 Difference]: Finished difference. Result has 158 places, 182 transitions, 1902 flow [2024-06-21 21:57:37,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1702, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1902, PETRI_PLACES=158, PETRI_TRANSITIONS=182} [2024-06-21 21:57:37,305 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 116 predicate places. [2024-06-21 21:57:37,305 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 182 transitions, 1902 flow [2024-06-21 21:57:37,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:57:37,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:57:37,305 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:57:37,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 21:57:37,306 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:57:37,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:57:37,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1621645993, now seen corresponding path program 1 times [2024-06-21 21:57:37,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:57:37,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011972087] [2024-06-21 21:57:37,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:57:37,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:57:37,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:57:40,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:57:40,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:57:40,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011972087] [2024-06-21 21:57:40,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011972087] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:57:40,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:57:40,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:57:40,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159211272] [2024-06-21 21:57:40,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:57:40,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:57:40,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:57:40,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:57:40,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:57:40,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 21:57:40,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 182 transitions, 1902 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:57:40,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:57:40,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 21:57:40,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:57:41,569 INFO L124 PetriNetUnfolderBase]: 1494/2467 cut-off events. [2024-06-21 21:57:41,569 INFO L125 PetriNetUnfolderBase]: For 76716/76716 co-relation queries the response was YES. [2024-06-21 21:57:41,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15039 conditions, 2467 events. 1494/2467 cut-off events. For 76716/76716 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 13581 event pairs, 365 based on Foata normal form. 2/2468 useless extension candidates. Maximal degree in co-relation 14966. Up to 2164 conditions per place. [2024-06-21 21:57:41,587 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 156 selfloop transitions, 66 changer transitions 0/227 dead transitions. [2024-06-21 21:57:41,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 227 transitions, 2730 flow [2024-06-21 21:57:41,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:57:41,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:57:41,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 165 transitions. [2024-06-21 21:57:41,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-21 21:57:41,589 INFO L175 Difference]: Start difference. First operand has 158 places, 182 transitions, 1902 flow. Second operand 10 states and 165 transitions. [2024-06-21 21:57:41,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 227 transitions, 2730 flow [2024-06-21 21:57:41,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 227 transitions, 2584 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-21 21:57:41,662 INFO L231 Difference]: Finished difference. Result has 164 places, 195 transitions, 2066 flow [2024-06-21 21:57:41,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1756, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2066, PETRI_PLACES=164, PETRI_TRANSITIONS=195} [2024-06-21 21:57:41,663 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 122 predicate places. [2024-06-21 21:57:41,663 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 195 transitions, 2066 flow [2024-06-21 21:57:41,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:57:41,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:57:41,663 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:57:41,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 21:57:41,663 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:57:41,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:57:41,664 INFO L85 PathProgramCache]: Analyzing trace with hash -1617926923, now seen corresponding path program 2 times [2024-06-21 21:57:41,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:57:41,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225191659] [2024-06-21 21:57:41,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:57:41,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:57:41,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:57:44,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:57:44,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:57:44,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225191659] [2024-06-21 21:57:44,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225191659] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:57:44,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:57:44,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:57:44,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788410142] [2024-06-21 21:57:44,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:57:44,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:57:44,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:57:44,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:57:44,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:57:44,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 21:57:44,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 195 transitions, 2066 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:57:44,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:57:44,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 21:57:44,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:57:46,011 INFO L124 PetriNetUnfolderBase]: 1546/2551 cut-off events. [2024-06-21 21:57:46,012 INFO L125 PetriNetUnfolderBase]: For 87039/87039 co-relation queries the response was YES. [2024-06-21 21:57:46,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16094 conditions, 2551 events. 1546/2551 cut-off events. For 87039/87039 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 14171 event pairs, 358 based on Foata normal form. 4/2555 useless extension candidates. Maximal degree in co-relation 16019. Up to 2259 conditions per place. [2024-06-21 21:57:46,032 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 182 selfloop transitions, 52 changer transitions 0/239 dead transitions. [2024-06-21 21:57:46,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 239 transitions, 2925 flow [2024-06-21 21:57:46,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:57:46,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:57:46,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 164 transitions. [2024-06-21 21:57:46,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-21 21:57:46,033 INFO L175 Difference]: Start difference. First operand has 164 places, 195 transitions, 2066 flow. Second operand 10 states and 164 transitions. [2024-06-21 21:57:46,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 239 transitions, 2925 flow [2024-06-21 21:57:46,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 239 transitions, 2736 flow, removed 61 selfloop flow, removed 5 redundant places. [2024-06-21 21:57:46,121 INFO L231 Difference]: Finished difference. Result has 169 places, 207 transitions, 2208 flow [2024-06-21 21:57:46,122 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1926, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2208, PETRI_PLACES=169, PETRI_TRANSITIONS=207} [2024-06-21 21:57:46,122 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 127 predicate places. [2024-06-21 21:57:46,122 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 207 transitions, 2208 flow [2024-06-21 21:57:46,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:57:46,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:57:46,122 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:57:46,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 21:57:46,123 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:57:46,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:57:46,123 INFO L85 PathProgramCache]: Analyzing trace with hash -1948880363, now seen corresponding path program 3 times [2024-06-21 21:57:46,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:57:46,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640275088] [2024-06-21 21:57:46,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:57:46,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:57:46,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:57:48,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:57:48,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:57:48,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640275088] [2024-06-21 21:57:48,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640275088] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:57:48,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:57:48,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:57:48,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297734248] [2024-06-21 21:57:48,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:57:48,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:57:48,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:57:48,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:57:48,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:57:49,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 21:57:49,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 207 transitions, 2208 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:57:49,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:57:49,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 21:57:49,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:57:50,324 INFO L124 PetriNetUnfolderBase]: 1534/2541 cut-off events. [2024-06-21 21:57:50,324 INFO L125 PetriNetUnfolderBase]: For 88413/88413 co-relation queries the response was YES. [2024-06-21 21:57:50,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16106 conditions, 2541 events. 1534/2541 cut-off events. For 88413/88413 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 14170 event pairs, 360 based on Foata normal form. 4/2545 useless extension candidates. Maximal degree in co-relation 16029. Up to 2249 conditions per place. [2024-06-21 21:57:50,346 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 182 selfloop transitions, 52 changer transitions 0/239 dead transitions. [2024-06-21 21:57:50,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 239 transitions, 2784 flow [2024-06-21 21:57:50,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:57:50,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:57:50,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 175 transitions. [2024-06-21 21:57:50,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38802660753880264 [2024-06-21 21:57:50,349 INFO L175 Difference]: Start difference. First operand has 169 places, 207 transitions, 2208 flow. Second operand 11 states and 175 transitions. [2024-06-21 21:57:50,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 239 transitions, 2784 flow [2024-06-21 21:57:50,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 239 transitions, 2640 flow, removed 50 selfloop flow, removed 6 redundant places. [2024-06-21 21:57:50,456 INFO L231 Difference]: Finished difference. Result has 174 places, 207 transitions, 2178 flow [2024-06-21 21:57:50,456 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2064, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2178, PETRI_PLACES=174, PETRI_TRANSITIONS=207} [2024-06-21 21:57:50,456 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 132 predicate places. [2024-06-21 21:57:50,457 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 207 transitions, 2178 flow [2024-06-21 21:57:50,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:57:50,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:57:50,457 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:57:50,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 21:57:50,457 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:57:50,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:57:50,457 INFO L85 PathProgramCache]: Analyzing trace with hash -1474036734, now seen corresponding path program 4 times [2024-06-21 21:57:50,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:57:50,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898863690] [2024-06-21 21:57:50,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:57:50,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:57:50,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:57:53,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:57:53,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:57:53,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898863690] [2024-06-21 21:57:53,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898863690] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:57:53,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:57:53,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:57:53,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414575173] [2024-06-21 21:57:53,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:57:53,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:57:53,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:57:53,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:57:53,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:57:53,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 21:57:53,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 207 transitions, 2178 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:57:53,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:57:53,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 21:57:53,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:57:54,909 INFO L124 PetriNetUnfolderBase]: 1539/2552 cut-off events. [2024-06-21 21:57:54,909 INFO L125 PetriNetUnfolderBase]: For 88939/88939 co-relation queries the response was YES. [2024-06-21 21:57:54,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16224 conditions, 2552 events. 1539/2552 cut-off events. For 88939/88939 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 14234 event pairs, 366 based on Foata normal form. 1/2553 useless extension candidates. Maximal degree in co-relation 16145. Up to 2313 conditions per place. [2024-06-21 21:57:54,930 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 195 selfloop transitions, 33 changer transitions 0/233 dead transitions. [2024-06-21 21:57:54,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 233 transitions, 2749 flow [2024-06-21 21:57:54,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:57:54,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:57:54,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-21 21:57:54,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39939024390243905 [2024-06-21 21:57:54,931 INFO L175 Difference]: Start difference. First operand has 174 places, 207 transitions, 2178 flow. Second operand 8 states and 131 transitions. [2024-06-21 21:57:54,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 233 transitions, 2749 flow [2024-06-21 21:57:55,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 233 transitions, 2625 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-06-21 21:57:55,036 INFO L231 Difference]: Finished difference. Result has 172 places, 210 transitions, 2175 flow [2024-06-21 21:57:55,037 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2054, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2175, PETRI_PLACES=172, PETRI_TRANSITIONS=210} [2024-06-21 21:57:55,037 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 130 predicate places. [2024-06-21 21:57:55,037 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 210 transitions, 2175 flow [2024-06-21 21:57:55,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:57:55,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:57:55,038 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:57:55,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 21:57:55,038 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:57:55,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:57:55,039 INFO L85 PathProgramCache]: Analyzing trace with hash -1473821067, now seen corresponding path program 1 times [2024-06-21 21:57:55,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:57:55,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274124028] [2024-06-21 21:57:55,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:57:55,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:57:55,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:57:59,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:57:59,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:57:59,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274124028] [2024-06-21 21:57:59,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274124028] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:57:59,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:57:59,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:57:59,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013393791] [2024-06-21 21:57:59,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:57:59,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:57:59,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:57:59,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:57:59,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:57:59,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 21:57:59,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 210 transitions, 2175 flow. Second operand has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:57:59,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:57:59,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 21:57:59,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:58:00,288 INFO L124 PetriNetUnfolderBase]: 1459/2450 cut-off events. [2024-06-21 21:58:00,289 INFO L125 PetriNetUnfolderBase]: For 104321/104333 co-relation queries the response was YES. [2024-06-21 21:58:00,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15941 conditions, 2450 events. 1459/2450 cut-off events. For 104321/104333 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 13900 event pairs, 343 based on Foata normal form. 12/2436 useless extension candidates. Maximal degree in co-relation 15861. Up to 2078 conditions per place. [2024-06-21 21:58:00,310 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 177 selfloop transitions, 35 changer transitions 0/241 dead transitions. [2024-06-21 21:58:00,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 241 transitions, 2723 flow [2024-06-21 21:58:00,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:58:00,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:58:00,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-21 21:58:00,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-21 21:58:00,311 INFO L175 Difference]: Start difference. First operand has 172 places, 210 transitions, 2175 flow. Second operand 9 states and 153 transitions. [2024-06-21 21:58:00,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 241 transitions, 2723 flow [2024-06-21 21:58:00,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 241 transitions, 2633 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-21 21:58:00,438 INFO L231 Difference]: Finished difference. Result has 175 places, 211 transitions, 2179 flow [2024-06-21 21:58:00,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2085, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2179, PETRI_PLACES=175, PETRI_TRANSITIONS=211} [2024-06-21 21:58:00,439 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 133 predicate places. [2024-06-21 21:58:00,439 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 211 transitions, 2179 flow [2024-06-21 21:58:00,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:58:00,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:58:00,440 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:58:00,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 21:58:00,440 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:58:00,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:58:00,441 INFO L85 PathProgramCache]: Analyzing trace with hash -220405920, now seen corresponding path program 5 times [2024-06-21 21:58:00,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:58:00,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808534179] [2024-06-21 21:58:00,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:58:00,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:58:00,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:58:03,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:58:03,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:58:03,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808534179] [2024-06-21 21:58:03,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808534179] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:58:03,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:58:03,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:58:03,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177218649] [2024-06-21 21:58:03,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:58:03,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:58:03,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:58:03,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:58:03,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:58:03,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 21:58:03,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 211 transitions, 2179 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:58:03,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:58:03,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 21:58:03,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:58:04,801 INFO L124 PetriNetUnfolderBase]: 1588/2617 cut-off events. [2024-06-21 21:58:04,802 INFO L125 PetriNetUnfolderBase]: For 97743/97743 co-relation queries the response was YES. [2024-06-21 21:58:04,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16823 conditions, 2617 events. 1588/2617 cut-off events. For 97743/97743 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 14579 event pairs, 390 based on Foata normal form. 1/2617 useless extension candidates. Maximal degree in co-relation 16742. Up to 2237 conditions per place. [2024-06-21 21:58:04,823 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 154 selfloop transitions, 83 changer transitions 0/242 dead transitions. [2024-06-21 21:58:04,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 242 transitions, 2957 flow [2024-06-21 21:58:04,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:58:04,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:58:04,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-21 21:58:04,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-21 21:58:04,825 INFO L175 Difference]: Start difference. First operand has 175 places, 211 transitions, 2179 flow. Second operand 8 states and 140 transitions. [2024-06-21 21:58:04,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 242 transitions, 2957 flow [2024-06-21 21:58:04,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 242 transitions, 2885 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-21 21:58:04,958 INFO L231 Difference]: Finished difference. Result has 176 places, 214 transitions, 2329 flow [2024-06-21 21:58:04,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2107, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2329, PETRI_PLACES=176, PETRI_TRANSITIONS=214} [2024-06-21 21:58:04,959 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 134 predicate places. [2024-06-21 21:58:04,959 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 214 transitions, 2329 flow [2024-06-21 21:58:04,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:58:04,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:58:04,960 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:58:04,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 21:58:04,960 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:58:04,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:58:04,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1574135946, now seen corresponding path program 6 times [2024-06-21 21:58:04,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:58:04,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143406661] [2024-06-21 21:58:04,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:58:04,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:58:04,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:58:07,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:58:07,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:58:07,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143406661] [2024-06-21 21:58:07,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143406661] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:58:07,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:58:07,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:58:07,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411120403] [2024-06-21 21:58:07,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:58:07,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:58:07,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:58:07,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:58:07,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:58:08,009 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 21:58:08,010 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 214 transitions, 2329 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:58:08,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:58:08,010 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 21:58:08,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:58:09,519 INFO L124 PetriNetUnfolderBase]: 1593/2630 cut-off events. [2024-06-21 21:58:09,519 INFO L125 PetriNetUnfolderBase]: For 101542/101542 co-relation queries the response was YES. [2024-06-21 21:58:09,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17036 conditions, 2630 events. 1593/2630 cut-off events. For 101542/101542 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 14675 event pairs, 398 based on Foata normal form. 1/2630 useless extension candidates. Maximal degree in co-relation 16954. Up to 2243 conditions per place. [2024-06-21 21:58:09,538 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 153 selfloop transitions, 84 changer transitions 0/242 dead transitions. [2024-06-21 21:58:09,538 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 242 transitions, 3109 flow [2024-06-21 21:58:09,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:58:09,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:58:09,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-21 21:58:09,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4176829268292683 [2024-06-21 21:58:09,539 INFO L175 Difference]: Start difference. First operand has 176 places, 214 transitions, 2329 flow. Second operand 8 states and 137 transitions. [2024-06-21 21:58:09,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 242 transitions, 3109 flow [2024-06-21 21:58:09,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 242 transitions, 2859 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-21 21:58:09,659 INFO L231 Difference]: Finished difference. Result has 178 places, 217 transitions, 2309 flow [2024-06-21 21:58:09,659 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2095, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2309, PETRI_PLACES=178, PETRI_TRANSITIONS=217} [2024-06-21 21:58:09,659 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 136 predicate places. [2024-06-21 21:58:09,660 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 217 transitions, 2309 flow [2024-06-21 21:58:09,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:58:09,660 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:58:09,660 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:58:09,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 21:58:09,660 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:58:09,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:58:09,661 INFO L85 PathProgramCache]: Analyzing trace with hash -1887834835, now seen corresponding path program 4 times [2024-06-21 21:58:09,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:58:09,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265422757] [2024-06-21 21:58:09,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:58:09,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:58:09,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:58:12,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:58:12,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:58:12,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265422757] [2024-06-21 21:58:12,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265422757] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:58:12,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:58:12,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:58:12,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920635996] [2024-06-21 21:58:12,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:58:12,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:58:12,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:58:12,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:58:12,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:58:12,641 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 21:58:12,642 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 217 transitions, 2309 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:58:12,642 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:58:12,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 21:58:12,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:58:13,986 INFO L124 PetriNetUnfolderBase]: 1603/2646 cut-off events. [2024-06-21 21:58:13,986 INFO L125 PetriNetUnfolderBase]: For 105810/105816 co-relation queries the response was YES. [2024-06-21 21:58:13,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17132 conditions, 2646 events. 1603/2646 cut-off events. For 105810/105816 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 14791 event pairs, 385 based on Foata normal form. 8/2654 useless extension candidates. Maximal degree in co-relation 17049. Up to 2356 conditions per place. [2024-06-21 21:58:14,006 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 184 selfloop transitions, 58 changer transitions 0/247 dead transitions. [2024-06-21 21:58:14,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 247 transitions, 3001 flow [2024-06-21 21:58:14,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:58:14,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:58:14,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-21 21:58:14,008 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3956639566395664 [2024-06-21 21:58:14,008 INFO L175 Difference]: Start difference. First operand has 178 places, 217 transitions, 2309 flow. Second operand 9 states and 146 transitions. [2024-06-21 21:58:14,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 247 transitions, 3001 flow [2024-06-21 21:58:14,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 247 transitions, 2826 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-21 21:58:14,153 INFO L231 Difference]: Finished difference. Result has 182 places, 221 transitions, 2302 flow [2024-06-21 21:58:14,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2134, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2302, PETRI_PLACES=182, PETRI_TRANSITIONS=221} [2024-06-21 21:58:14,154 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 140 predicate places. [2024-06-21 21:58:14,154 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 221 transitions, 2302 flow [2024-06-21 21:58:14,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:58:14,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:58:14,154 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:58:14,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 21:58:14,155 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:58:14,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:58:14,155 INFO L85 PathProgramCache]: Analyzing trace with hash -1562707765, now seen corresponding path program 5 times [2024-06-21 21:58:14,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:58:14,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958800564] [2024-06-21 21:58:14,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:58:14,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:58:14,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:58:16,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:58:16,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:58:16,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958800564] [2024-06-21 21:58:16,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958800564] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:58:16,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:58:16,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:58:16,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153116157] [2024-06-21 21:58:16,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:58:16,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:58:16,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:58:16,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:58:16,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:58:16,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 21:58:16,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 221 transitions, 2302 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:58:16,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:58:16,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 21:58:16,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:58:18,177 INFO L124 PetriNetUnfolderBase]: 1629/2692 cut-off events. [2024-06-21 21:58:18,177 INFO L125 PetriNetUnfolderBase]: For 112048/112054 co-relation queries the response was YES. [2024-06-21 21:58:18,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17516 conditions, 2692 events. 1629/2692 cut-off events. For 112048/112054 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 15131 event pairs, 378 based on Foata normal form. 8/2700 useless extension candidates. Maximal degree in co-relation 17432. Up to 2279 conditions per place. [2024-06-21 21:58:18,198 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 162 selfloop transitions, 90 changer transitions 0/257 dead transitions. [2024-06-21 21:58:18,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 257 transitions, 3219 flow [2024-06-21 21:58:18,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:58:18,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:58:18,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-21 21:58:18,200 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-21 21:58:18,200 INFO L175 Difference]: Start difference. First operand has 182 places, 221 transitions, 2302 flow. Second operand 8 states and 136 transitions. [2024-06-21 21:58:18,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 257 transitions, 3219 flow [2024-06-21 21:58:18,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 257 transitions, 3133 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-21 21:58:18,353 INFO L231 Difference]: Finished difference. Result has 186 places, 233 transitions, 2597 flow [2024-06-21 21:58:18,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2218, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2597, PETRI_PLACES=186, PETRI_TRANSITIONS=233} [2024-06-21 21:58:18,354 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 144 predicate places. [2024-06-21 21:58:18,354 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 233 transitions, 2597 flow [2024-06-21 21:58:18,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:58:18,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:58:18,354 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:58:18,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 21:58:18,354 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:58:18,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:58:18,355 INFO L85 PathProgramCache]: Analyzing trace with hash -2054227466, now seen corresponding path program 7 times [2024-06-21 21:58:18,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:58:18,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604642003] [2024-06-21 21:58:18,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:58:18,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:58:18,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:58:21,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:58:21,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:58:21,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604642003] [2024-06-21 21:58:21,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604642003] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:58:21,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:58:21,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:58:21,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908238315] [2024-06-21 21:58:21,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:58:21,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:58:21,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:58:21,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:58:21,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:58:21,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 21:58:21,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 233 transitions, 2597 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:58:21,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:58:21,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 21:58:21,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:58:22,438 INFO L124 PetriNetUnfolderBase]: 1634/2689 cut-off events. [2024-06-21 21:58:22,438 INFO L125 PetriNetUnfolderBase]: For 117079/117079 co-relation queries the response was YES. [2024-06-21 21:58:22,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18194 conditions, 2689 events. 1634/2689 cut-off events. For 117079/117079 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 15059 event pairs, 395 based on Foata normal form. 1/2689 useless extension candidates. Maximal degree in co-relation 18107. Up to 2299 conditions per place. [2024-06-21 21:58:22,463 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 159 selfloop transitions, 91 changer transitions 0/255 dead transitions. [2024-06-21 21:58:22,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 255 transitions, 3288 flow [2024-06-21 21:58:22,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:58:22,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:58:22,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-21 21:58:22,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39939024390243905 [2024-06-21 21:58:22,465 INFO L175 Difference]: Start difference. First operand has 186 places, 233 transitions, 2597 flow. Second operand 8 states and 131 transitions. [2024-06-21 21:58:22,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 255 transitions, 3288 flow [2024-06-21 21:58:22,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 255 transitions, 3209 flow, removed 30 selfloop flow, removed 2 redundant places. [2024-06-21 21:58:22,626 INFO L231 Difference]: Finished difference. Result has 192 places, 236 transitions, 2749 flow [2024-06-21 21:58:22,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2518, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2749, PETRI_PLACES=192, PETRI_TRANSITIONS=236} [2024-06-21 21:58:22,627 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 150 predicate places. [2024-06-21 21:58:22,627 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 236 transitions, 2749 flow [2024-06-21 21:58:22,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:58:22,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:58:22,628 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:58:22,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 21:58:22,628 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:58:22,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:58:22,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1563093715, now seen corresponding path program 6 times [2024-06-21 21:58:22,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:58:22,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834658326] [2024-06-21 21:58:22,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:58:22,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:58:22,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:58:25,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:58:25,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:58:25,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834658326] [2024-06-21 21:58:25,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834658326] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:58:25,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:58:25,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:58:25,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376415890] [2024-06-21 21:58:25,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:58:25,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:58:25,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:58:25,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:58:25,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:58:25,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 21:58:25,634 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 236 transitions, 2749 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:58:25,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:58:25,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 21:58:25,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:58:26,878 INFO L124 PetriNetUnfolderBase]: 1628/2683 cut-off events. [2024-06-21 21:58:26,878 INFO L125 PetriNetUnfolderBase]: For 120685/120691 co-relation queries the response was YES. [2024-06-21 21:58:26,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18268 conditions, 2683 events. 1628/2683 cut-off events. For 120685/120691 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 15062 event pairs, 381 based on Foata normal form. 8/2691 useless extension candidates. Maximal degree in co-relation 18178. Up to 2402 conditions per place. [2024-06-21 21:58:26,898 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 193 selfloop transitions, 57 changer transitions 0/255 dead transitions. [2024-06-21 21:58:26,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 255 transitions, 3303 flow [2024-06-21 21:58:26,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:58:26,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:58:26,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-21 21:58:26,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-21 21:58:26,900 INFO L175 Difference]: Start difference. First operand has 192 places, 236 transitions, 2749 flow. Second operand 8 states and 128 transitions. [2024-06-21 21:58:26,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 255 transitions, 3303 flow [2024-06-21 21:58:27,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 255 transitions, 3134 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-21 21:58:27,052 INFO L231 Difference]: Finished difference. Result has 195 places, 236 transitions, 2700 flow [2024-06-21 21:58:27,052 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2580, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2700, PETRI_PLACES=195, PETRI_TRANSITIONS=236} [2024-06-21 21:58:27,053 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 153 predicate places. [2024-06-21 21:58:27,053 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 236 transitions, 2700 flow [2024-06-21 21:58:27,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:58:27,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:58:27,053 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:58:27,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 21:58:27,053 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:58:27,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:58:27,054 INFO L85 PathProgramCache]: Analyzing trace with hash -1670797781, now seen corresponding path program 7 times [2024-06-21 21:58:27,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:58:27,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157349498] [2024-06-21 21:58:27,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:58:27,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:58:27,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:58:29,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:58:29,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:58:29,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157349498] [2024-06-21 21:58:29,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157349498] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:58:29,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:58:29,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:58:29,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126134433] [2024-06-21 21:58:29,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:58:29,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:58:29,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:58:29,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:58:29,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:58:29,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 21:58:29,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 236 transitions, 2700 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:58:29,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:58:29,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 21:58:29,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:58:30,907 INFO L124 PetriNetUnfolderBase]: 1686/2765 cut-off events. [2024-06-21 21:58:30,908 INFO L125 PetriNetUnfolderBase]: For 133750/133750 co-relation queries the response was YES. [2024-06-21 21:58:30,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19184 conditions, 2765 events. 1686/2765 cut-off events. For 133750/133750 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 15465 event pairs, 394 based on Foata normal form. 2/2766 useless extension candidates. Maximal degree in co-relation 19093. Up to 2282 conditions per place. [2024-06-21 21:58:30,931 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 160 selfloop transitions, 106 changer transitions 0/271 dead transitions. [2024-06-21 21:58:30,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 271 transitions, 3706 flow [2024-06-21 21:58:30,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:58:30,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:58:30,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-21 21:58:30,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-21 21:58:30,933 INFO L175 Difference]: Start difference. First operand has 195 places, 236 transitions, 2700 flow. Second operand 7 states and 126 transitions. [2024-06-21 21:58:30,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 271 transitions, 3706 flow [2024-06-21 21:58:31,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 271 transitions, 3580 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-21 21:58:31,114 INFO L231 Difference]: Finished difference. Result has 195 places, 248 transitions, 3014 flow [2024-06-21 21:58:31,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2574, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3014, PETRI_PLACES=195, PETRI_TRANSITIONS=248} [2024-06-21 21:58:31,114 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 153 predicate places. [2024-06-21 21:58:31,115 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 248 transitions, 3014 flow [2024-06-21 21:58:31,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:58:31,115 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:58:31,115 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:58:31,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 21:58:31,115 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:58:31,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:58:31,116 INFO L85 PathProgramCache]: Analyzing trace with hash -806957728, now seen corresponding path program 8 times [2024-06-21 21:58:31,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:58:31,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883569736] [2024-06-21 21:58:31,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:58:31,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:58:31,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:58:33,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:58:33,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:58:33,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883569736] [2024-06-21 21:58:33,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883569736] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:58:33,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:58:33,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:58:33,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678581947] [2024-06-21 21:58:33,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:58:33,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:58:33,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:58:33,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:58:33,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:58:34,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 21:58:34,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 248 transitions, 3014 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:58:34,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:58:34,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 21:58:34,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:58:34,944 INFO L124 PetriNetUnfolderBase]: 1683/2765 cut-off events. [2024-06-21 21:58:34,944 INFO L125 PetriNetUnfolderBase]: For 138906/138906 co-relation queries the response was YES. [2024-06-21 21:58:34,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19695 conditions, 2765 events. 1683/2765 cut-off events. For 138906/138906 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 15527 event pairs, 401 based on Foata normal form. 1/2765 useless extension candidates. Maximal degree in co-relation 19603. Up to 2404 conditions per place. [2024-06-21 21:58:34,966 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 201 selfloop transitions, 68 changer transitions 0/274 dead transitions. [2024-06-21 21:58:34,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 274 transitions, 3730 flow [2024-06-21 21:58:34,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:58:34,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:58:34,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-21 21:58:34,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4425087108013937 [2024-06-21 21:58:34,968 INFO L175 Difference]: Start difference. First operand has 195 places, 248 transitions, 3014 flow. Second operand 7 states and 127 transitions. [2024-06-21 21:58:34,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 274 transitions, 3730 flow [2024-06-21 21:58:35,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 274 transitions, 3602 flow, removed 48 selfloop flow, removed 2 redundant places. [2024-06-21 21:58:35,140 INFO L231 Difference]: Finished difference. Result has 200 places, 248 transitions, 3033 flow [2024-06-21 21:58:35,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2886, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3033, PETRI_PLACES=200, PETRI_TRANSITIONS=248} [2024-06-21 21:58:35,140 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 158 predicate places. [2024-06-21 21:58:35,140 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 248 transitions, 3033 flow [2024-06-21 21:58:35,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:58:35,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:58:35,141 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:58:35,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 21:58:35,141 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:58:35,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:58:35,142 INFO L85 PathProgramCache]: Analyzing trace with hash -612983567, now seen corresponding path program 8 times [2024-06-21 21:58:35,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:58:35,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118308268] [2024-06-21 21:58:35,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:58:35,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:58:35,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:58:38,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:58:38,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:58:38,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118308268] [2024-06-21 21:58:38,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118308268] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:58:38,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:58:38,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:58:38,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097039877] [2024-06-21 21:58:38,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:58:38,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:58:38,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:58:38,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:58:38,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:58:38,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 21:58:38,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 248 transitions, 3033 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:58:38,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:58:38,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 21:58:38,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:58:39,842 INFO L124 PetriNetUnfolderBase]: 1703/2797 cut-off events. [2024-06-21 21:58:39,842 INFO L125 PetriNetUnfolderBase]: For 145531/145531 co-relation queries the response was YES. [2024-06-21 21:58:39,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19828 conditions, 2797 events. 1703/2797 cut-off events. For 145531/145531 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 15731 event pairs, 376 based on Foata normal form. 4/2800 useless extension candidates. Maximal degree in co-relation 19734. Up to 2298 conditions per place. [2024-06-21 21:58:39,868 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 157 selfloop transitions, 119 changer transitions 0/281 dead transitions. [2024-06-21 21:58:39,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 281 transitions, 3983 flow [2024-06-21 21:58:39,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:58:39,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:58:39,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 165 transitions. [2024-06-21 21:58:39,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-21 21:58:39,870 INFO L175 Difference]: Start difference. First operand has 200 places, 248 transitions, 3033 flow. Second operand 10 states and 165 transitions. [2024-06-21 21:58:39,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 281 transitions, 3983 flow [2024-06-21 21:58:40,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 281 transitions, 3755 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-21 21:58:40,058 INFO L231 Difference]: Finished difference. Result has 201 places, 254 transitions, 3181 flow [2024-06-21 21:58:40,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2809, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3181, PETRI_PLACES=201, PETRI_TRANSITIONS=254} [2024-06-21 21:58:40,058 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 159 predicate places. [2024-06-21 21:58:40,058 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 254 transitions, 3181 flow [2024-06-21 21:58:40,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:58:40,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:58:40,058 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:58:40,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-21 21:58:40,059 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:58:40,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:58:40,059 INFO L85 PathProgramCache]: Analyzing trace with hash -806957387, now seen corresponding path program 9 times [2024-06-21 21:58:40,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:58:40,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706646162] [2024-06-21 21:58:40,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:58:40,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:58:40,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:58:42,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:58:42,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:58:42,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706646162] [2024-06-21 21:58:42,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706646162] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:58:42,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:58:42,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:58:42,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965720955] [2024-06-21 21:58:42,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:58:42,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:58:42,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:58:42,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:58:42,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:58:42,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 21:58:42,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 254 transitions, 3181 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:58:42,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:58:42,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 21:58:42,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:58:44,113 INFO L124 PetriNetUnfolderBase]: 1697/2789 cut-off events. [2024-06-21 21:58:44,113 INFO L125 PetriNetUnfolderBase]: For 140133/140133 co-relation queries the response was YES. [2024-06-21 21:58:44,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19825 conditions, 2789 events. 1697/2789 cut-off events. For 140133/140133 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 15664 event pairs, 404 based on Foata normal form. 2/2790 useless extension candidates. Maximal degree in co-relation 19731. Up to 2464 conditions per place. [2024-06-21 21:58:44,141 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 210 selfloop transitions, 61 changer transitions 0/276 dead transitions. [2024-06-21 21:58:44,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 276 transitions, 3789 flow [2024-06-21 21:58:44,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:58:44,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:58:44,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-21 21:58:44,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4250871080139373 [2024-06-21 21:58:44,143 INFO L175 Difference]: Start difference. First operand has 201 places, 254 transitions, 3181 flow. Second operand 7 states and 122 transitions. [2024-06-21 21:58:44,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 276 transitions, 3789 flow [2024-06-21 21:58:44,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 276 transitions, 3463 flow, removed 74 selfloop flow, removed 6 redundant places. [2024-06-21 21:58:44,387 INFO L231 Difference]: Finished difference. Result has 202 places, 254 transitions, 2983 flow [2024-06-21 21:58:44,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2855, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2983, PETRI_PLACES=202, PETRI_TRANSITIONS=254} [2024-06-21 21:58:44,388 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 160 predicate places. [2024-06-21 21:58:44,388 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 254 transitions, 2983 flow [2024-06-21 21:58:44,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:58:44,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:58:44,388 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:58:44,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-21 21:58:44,388 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:58:44,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:58:44,389 INFO L85 PathProgramCache]: Analyzing trace with hash -607269647, now seen corresponding path program 10 times [2024-06-21 21:58:44,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:58:44,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964044183] [2024-06-21 21:58:44,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:58:44,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:58:44,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:58:47,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:58:47,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:58:47,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964044183] [2024-06-21 21:58:47,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964044183] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:58:47,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:58:47,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:58:47,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135449525] [2024-06-21 21:58:47,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:58:47,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:58:47,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:58:47,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:58:47,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:58:47,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 21:58:47,065 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 254 transitions, 2983 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:58:47,065 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:58:47,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 21:58:47,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:58:48,375 INFO L124 PetriNetUnfolderBase]: 1691/2781 cut-off events. [2024-06-21 21:58:48,375 INFO L125 PetriNetUnfolderBase]: For 139816/139816 co-relation queries the response was YES. [2024-06-21 21:58:48,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19309 conditions, 2781 events. 1691/2781 cut-off events. For 139816/139816 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 15636 event pairs, 381 based on Foata normal form. 2/2782 useless extension candidates. Maximal degree in co-relation 19214. Up to 2288 conditions per place. [2024-06-21 21:58:48,400 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 157 selfloop transitions, 117 changer transitions 0/279 dead transitions. [2024-06-21 21:58:48,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 279 transitions, 3805 flow [2024-06-21 21:58:48,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:58:48,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:58:48,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-21 21:58:48,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41192411924119243 [2024-06-21 21:58:48,401 INFO L175 Difference]: Start difference. First operand has 202 places, 254 transitions, 2983 flow. Second operand 9 states and 152 transitions. [2024-06-21 21:58:48,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 279 transitions, 3805 flow [2024-06-21 21:58:48,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 279 transitions, 3663 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-21 21:58:48,599 INFO L231 Difference]: Finished difference. Result has 205 places, 254 transitions, 3081 flow [2024-06-21 21:58:48,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2841, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3081, PETRI_PLACES=205, PETRI_TRANSITIONS=254} [2024-06-21 21:58:48,600 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 163 predicate places. [2024-06-21 21:58:48,600 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 254 transitions, 3081 flow [2024-06-21 21:58:48,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:58:48,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:58:48,600 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:58:48,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-21 21:58:48,600 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:58:48,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:58:48,601 INFO L85 PathProgramCache]: Analyzing trace with hash -983881517, now seen corresponding path program 11 times [2024-06-21 21:58:48,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:58:48,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238810759] [2024-06-21 21:58:48,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:58:48,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:58:48,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:58:51,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:58:51,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:58:51,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238810759] [2024-06-21 21:58:51,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238810759] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:58:51,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:58:51,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:58:51,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533814612] [2024-06-21 21:58:51,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:58:51,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:58:51,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:58:51,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:58:51,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:58:51,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 21:58:51,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 254 transitions, 3081 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:58:51,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:58:51,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 21:58:51,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:58:52,828 INFO L124 PetriNetUnfolderBase]: 1725/2845 cut-off events. [2024-06-21 21:58:52,828 INFO L125 PetriNetUnfolderBase]: For 144932/144932 co-relation queries the response was YES. [2024-06-21 21:58:52,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19798 conditions, 2845 events. 1725/2845 cut-off events. For 144932/144932 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 16144 event pairs, 376 based on Foata normal form. 4/2849 useless extension candidates. Maximal degree in co-relation 19702. Up to 2418 conditions per place. [2024-06-21 21:58:52,852 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 197 selfloop transitions, 98 changer transitions 0/300 dead transitions. [2024-06-21 21:58:52,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 300 transitions, 4033 flow [2024-06-21 21:58:52,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:58:52,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:58:52,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-21 21:58:52,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4281842818428184 [2024-06-21 21:58:52,854 INFO L175 Difference]: Start difference. First operand has 205 places, 254 transitions, 3081 flow. Second operand 9 states and 158 transitions. [2024-06-21 21:58:52,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 300 transitions, 4033 flow [2024-06-21 21:58:53,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 300 transitions, 3723 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-21 21:58:53,055 INFO L231 Difference]: Finished difference. Result has 207 places, 266 transitions, 3204 flow [2024-06-21 21:58:53,056 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2795, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3204, PETRI_PLACES=207, PETRI_TRANSITIONS=266} [2024-06-21 21:58:53,056 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 165 predicate places. [2024-06-21 21:58:53,056 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 266 transitions, 3204 flow [2024-06-21 21:58:53,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:58:53,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:58:53,057 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:58:53,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-21 21:58:53,057 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:58:53,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:58:53,058 INFO L85 PathProgramCache]: Analyzing trace with hash -861253238, now seen corresponding path program 9 times [2024-06-21 21:58:53,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:58:53,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134382591] [2024-06-21 21:58:53,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:58:53,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:58:53,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:58:56,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:58:56,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:58:56,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134382591] [2024-06-21 21:58:56,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134382591] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:58:56,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:58:56,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:58:56,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779219741] [2024-06-21 21:58:56,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:58:56,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:58:56,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:58:56,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:58:56,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:58:56,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 21:58:56,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 266 transitions, 3204 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:58:56,169 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:58:56,169 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 21:58:56,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:58:57,842 INFO L124 PetriNetUnfolderBase]: 1722/2845 cut-off events. [2024-06-21 21:58:57,842 INFO L125 PetriNetUnfolderBase]: For 143238/143238 co-relation queries the response was YES. [2024-06-21 21:58:57,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19859 conditions, 2845 events. 1722/2845 cut-off events. For 143238/143238 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 16197 event pairs, 390 based on Foata normal form. 1/2846 useless extension candidates. Maximal degree in co-relation 19761. Up to 2461 conditions per place. [2024-06-21 21:58:57,867 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 229 selfloop transitions, 72 changer transitions 0/306 dead transitions. [2024-06-21 21:58:57,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 306 transitions, 3926 flow [2024-06-21 21:58:57,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:58:57,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:58:57,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-21 21:58:57,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44173441734417346 [2024-06-21 21:58:57,868 INFO L175 Difference]: Start difference. First operand has 207 places, 266 transitions, 3204 flow. Second operand 9 states and 163 transitions. [2024-06-21 21:58:57,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 306 transitions, 3926 flow [2024-06-21 21:58:58,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 306 transitions, 3715 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-21 21:58:58,105 INFO L231 Difference]: Finished difference. Result has 210 places, 266 transitions, 3153 flow [2024-06-21 21:58:58,105 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2993, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3153, PETRI_PLACES=210, PETRI_TRANSITIONS=266} [2024-06-21 21:58:58,106 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 168 predicate places. [2024-06-21 21:58:58,106 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 266 transitions, 3153 flow [2024-06-21 21:58:58,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:58:58,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:58:58,106 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:58:58,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-21 21:58:58,107 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:58:58,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:58:58,107 INFO L85 PathProgramCache]: Analyzing trace with hash 1471435471, now seen corresponding path program 12 times [2024-06-21 21:58:58,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:58:58,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383876141] [2024-06-21 21:58:58,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:58:58,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:58:58,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:59:00,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:59:00,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:59:00,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383876141] [2024-06-21 21:59:00,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383876141] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:59:00,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:59:00,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:59:00,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18318065] [2024-06-21 21:59:00,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:59:00,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:59:00,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:59:00,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:59:00,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:59:00,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 21:59:00,925 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 266 transitions, 3153 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:59:00,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:59:00,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 21:59:00,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:59:02,523 INFO L124 PetriNetUnfolderBase]: 1710/2825 cut-off events. [2024-06-21 21:59:02,523 INFO L125 PetriNetUnfolderBase]: For 145808/145808 co-relation queries the response was YES. [2024-06-21 21:59:02,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19467 conditions, 2825 events. 1710/2825 cut-off events. For 145808/145808 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 16104 event pairs, 374 based on Foata normal form. 4/2829 useless extension candidates. Maximal degree in co-relation 19368. Up to 2404 conditions per place. [2024-06-21 21:59:02,545 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 203 selfloop transitions, 98 changer transitions 0/306 dead transitions. [2024-06-21 21:59:02,545 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 306 transitions, 3869 flow [2024-06-21 21:59:02,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:59:02,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:59:02,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 188 transitions. [2024-06-21 21:59:02,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41685144124168516 [2024-06-21 21:59:02,547 INFO L175 Difference]: Start difference. First operand has 210 places, 266 transitions, 3153 flow. Second operand 11 states and 188 transitions. [2024-06-21 21:59:02,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 306 transitions, 3869 flow [2024-06-21 21:59:02,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 306 transitions, 3642 flow, removed 19 selfloop flow, removed 10 redundant places. [2024-06-21 21:59:02,754 INFO L231 Difference]: Finished difference. Result has 211 places, 266 transitions, 3140 flow [2024-06-21 21:59:02,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2926, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3140, PETRI_PLACES=211, PETRI_TRANSITIONS=266} [2024-06-21 21:59:02,754 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 169 predicate places. [2024-06-21 21:59:02,755 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 266 transitions, 3140 flow [2024-06-21 21:59:02,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:59:02,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:59:02,755 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:59:02,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-21 21:59:02,755 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:59:02,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:59:02,755 INFO L85 PathProgramCache]: Analyzing trace with hash -983873581, now seen corresponding path program 2 times [2024-06-21 21:59:02,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:59:02,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314032500] [2024-06-21 21:59:02,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:59:02,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:59:02,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:59:06,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:59:06,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:59:06,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314032500] [2024-06-21 21:59:06,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314032500] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:59:06,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:59:06,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:59:06,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674716815] [2024-06-21 21:59:06,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:59:06,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:59:06,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:59:06,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:59:06,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:59:06,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 21:59:06,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 266 transitions, 3140 flow. Second operand has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:59:06,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:59:06,397 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 21:59:06,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:59:07,422 INFO L124 PetriNetUnfolderBase]: 1620/2707 cut-off events. [2024-06-21 21:59:07,422 INFO L125 PetriNetUnfolderBase]: For 152968/152972 co-relation queries the response was YES. [2024-06-21 21:59:07,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18887 conditions, 2707 events. 1620/2707 cut-off events. For 152968/152972 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 15611 event pairs, 352 based on Foata normal form. 12/2687 useless extension candidates. Maximal degree in co-relation 18788. Up to 2235 conditions per place. [2024-06-21 21:59:07,444 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 217 selfloop transitions, 39 changer transitions 0/294 dead transitions. [2024-06-21 21:59:07,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 294 transitions, 3774 flow [2024-06-21 21:59:07,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:59:07,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:59:07,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-21 21:59:07,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-21 21:59:07,446 INFO L175 Difference]: Start difference. First operand has 211 places, 266 transitions, 3140 flow. Second operand 7 states and 126 transitions. [2024-06-21 21:59:07,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 294 transitions, 3774 flow [2024-06-21 21:59:07,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 294 transitions, 3544 flow, removed 1 selfloop flow, removed 11 redundant places. [2024-06-21 21:59:07,620 INFO L231 Difference]: Finished difference. Result has 207 places, 267 transitions, 3022 flow [2024-06-21 21:59:07,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2910, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3022, PETRI_PLACES=207, PETRI_TRANSITIONS=267} [2024-06-21 21:59:07,621 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 165 predicate places. [2024-06-21 21:59:07,621 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 267 transitions, 3022 flow [2024-06-21 21:59:07,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:59:07,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:59:07,621 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:59:07,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-21 21:59:07,622 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:59:07,622 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:59:07,622 INFO L85 PathProgramCache]: Analyzing trace with hash -612600841, now seen corresponding path program 3 times [2024-06-21 21:59:07,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:59:07,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717018274] [2024-06-21 21:59:07,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:59:07,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:59:07,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:59:11,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:59:11,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:59:11,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717018274] [2024-06-21 21:59:11,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717018274] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:59:11,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:59:11,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:59:11,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496045360] [2024-06-21 21:59:11,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:59:11,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:59:11,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:59:11,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:59:11,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:59:11,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 21:59:11,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 267 transitions, 3022 flow. Second operand has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:59:11,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:59:11,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 21:59:11,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:59:12,561 INFO L124 PetriNetUnfolderBase]: 1659/2780 cut-off events. [2024-06-21 21:59:12,561 INFO L125 PetriNetUnfolderBase]: For 153722/153727 co-relation queries the response was YES. [2024-06-21 21:59:12,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19164 conditions, 2780 events. 1659/2780 cut-off events. For 153722/153727 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 16203 event pairs, 361 based on Foata normal form. 12/2759 useless extension candidates. Maximal degree in co-relation 19065. Up to 2337 conditions per place. [2024-06-21 21:59:12,588 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 206 selfloop transitions, 44 changer transitions 0/288 dead transitions. [2024-06-21 21:59:12,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 288 transitions, 3624 flow [2024-06-21 21:59:12,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:59:12,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:59:12,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-21 21:59:12,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4181184668989547 [2024-06-21 21:59:12,590 INFO L175 Difference]: Start difference. First operand has 207 places, 267 transitions, 3022 flow. Second operand 7 states and 120 transitions. [2024-06-21 21:59:12,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 288 transitions, 3624 flow [2024-06-21 21:59:12,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 288 transitions, 3546 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-21 21:59:12,786 INFO L231 Difference]: Finished difference. Result has 209 places, 268 transitions, 3060 flow [2024-06-21 21:59:12,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2946, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3060, PETRI_PLACES=209, PETRI_TRANSITIONS=268} [2024-06-21 21:59:12,786 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 167 predicate places. [2024-06-21 21:59:12,787 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 268 transitions, 3060 flow [2024-06-21 21:59:12,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:59:12,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:59:12,787 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:59:12,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-21 21:59:12,787 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:59:12,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:59:12,788 INFO L85 PathProgramCache]: Analyzing trace with hash -599643151, now seen corresponding path program 4 times [2024-06-21 21:59:12,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:59:12,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238888524] [2024-06-21 21:59:12,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:59:12,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:59:12,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:59:16,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:59:16,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:59:16,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238888524] [2024-06-21 21:59:16,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238888524] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:59:16,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:59:16,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:59:16,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522807756] [2024-06-21 21:59:16,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:59:16,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:59:16,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:59:16,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:59:16,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:59:16,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 21:59:16,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 268 transitions, 3060 flow. Second operand has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:59:16,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:59:16,272 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 21:59:16,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:59:17,222 INFO L124 PetriNetUnfolderBase]: 1661/2786 cut-off events. [2024-06-21 21:59:17,222 INFO L125 PetriNetUnfolderBase]: For 141460/141465 co-relation queries the response was YES. [2024-06-21 21:59:17,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18915 conditions, 2786 events. 1661/2786 cut-off events. For 141460/141465 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 16232 event pairs, 357 based on Foata normal form. 8/2761 useless extension candidates. Maximal degree in co-relation 18815. Up to 2207 conditions per place. [2024-06-21 21:59:17,248 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 205 selfloop transitions, 48 changer transitions 0/291 dead transitions. [2024-06-21 21:59:17,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 291 transitions, 3688 flow [2024-06-21 21:59:17,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:59:17,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:59:17,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-21 21:59:17,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42160278745644597 [2024-06-21 21:59:17,249 INFO L175 Difference]: Start difference. First operand has 209 places, 268 transitions, 3060 flow. Second operand 7 states and 121 transitions. [2024-06-21 21:59:17,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 291 transitions, 3688 flow [2024-06-21 21:59:17,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 291 transitions, 3596 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-21 21:59:17,449 INFO L231 Difference]: Finished difference. Result has 211 places, 269 transitions, 3090 flow [2024-06-21 21:59:17,449 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2968, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3090, PETRI_PLACES=211, PETRI_TRANSITIONS=269} [2024-06-21 21:59:17,449 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 169 predicate places. [2024-06-21 21:59:17,449 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 269 transitions, 3090 flow [2024-06-21 21:59:17,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:59:17,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:59:17,449 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:59:17,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-21 21:59:17,450 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:59:17,450 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:59:17,450 INFO L85 PathProgramCache]: Analyzing trace with hash -1566509109, now seen corresponding path program 1 times [2024-06-21 21:59:17,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:59:17,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252869577] [2024-06-21 21:59:17,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:59:17,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:59:17,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:59:19,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:59:19,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:59:19,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252869577] [2024-06-21 21:59:19,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252869577] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:59:19,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:59:19,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:59:19,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216747234] [2024-06-21 21:59:19,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:59:19,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:59:19,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:59:19,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:59:19,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:59:19,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 21:59:19,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 269 transitions, 3090 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:59:19,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:59:19,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 21:59:19,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:59:20,982 INFO L124 PetriNetUnfolderBase]: 1861/3060 cut-off events. [2024-06-21 21:59:20,982 INFO L125 PetriNetUnfolderBase]: For 157550/157550 co-relation queries the response was YES. [2024-06-21 21:59:21,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20909 conditions, 3060 events. 1861/3060 cut-off events. For 157550/157550 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 17469 event pairs, 391 based on Foata normal form. 8/3067 useless extension candidates. Maximal degree in co-relation 20808. Up to 2673 conditions per place. [2024-06-21 21:59:21,010 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 268 selfloop transitions, 32 changer transitions 0/305 dead transitions. [2024-06-21 21:59:21,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 305 transitions, 3972 flow [2024-06-21 21:59:21,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:59:21,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:59:21,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-21 21:59:21,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-21 21:59:21,011 INFO L175 Difference]: Start difference. First operand has 211 places, 269 transitions, 3090 flow. Second operand 8 states and 140 transitions. [2024-06-21 21:59:21,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 305 transitions, 3972 flow [2024-06-21 21:59:21,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 305 transitions, 3866 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-21 21:59:21,231 INFO L231 Difference]: Finished difference. Result has 214 places, 271 transitions, 3090 flow [2024-06-21 21:59:21,232 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2984, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3090, PETRI_PLACES=214, PETRI_TRANSITIONS=271} [2024-06-21 21:59:21,232 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 172 predicate places. [2024-06-21 21:59:21,232 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 271 transitions, 3090 flow [2024-06-21 21:59:21,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:59:21,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:59:21,232 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:59:21,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-21 21:59:21,232 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:59:21,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:59:21,233 INFO L85 PathProgramCache]: Analyzing trace with hash 1423007319, now seen corresponding path program 2 times [2024-06-21 21:59:21,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:59:21,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58661605] [2024-06-21 21:59:21,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:59:21,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:59:21,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:59:23,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:59:23,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:59:23,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58661605] [2024-06-21 21:59:23,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58661605] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:59:23,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:59:23,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:59:23,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076881119] [2024-06-21 21:59:23,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:59:23,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:59:23,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:59:23,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:59:23,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:59:23,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 21:59:23,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 271 transitions, 3090 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:59:23,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:59:23,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 21:59:23,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:59:25,058 INFO L124 PetriNetUnfolderBase]: 1948/3202 cut-off events. [2024-06-21 21:59:25,058 INFO L125 PetriNetUnfolderBase]: For 178948/178948 co-relation queries the response was YES. [2024-06-21 21:59:25,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22255 conditions, 3202 events. 1948/3202 cut-off events. For 178948/178948 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 18493 event pairs, 436 based on Foata normal form. 8/3209 useless extension candidates. Maximal degree in co-relation 22153. Up to 2862 conditions per place. [2024-06-21 21:59:25,089 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 269 selfloop transitions, 29 changer transitions 0/303 dead transitions. [2024-06-21 21:59:25,089 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 303 transitions, 3962 flow [2024-06-21 21:59:25,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:59:25,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:59:25,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-21 21:59:25,090 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4176829268292683 [2024-06-21 21:59:25,091 INFO L175 Difference]: Start difference. First operand has 214 places, 271 transitions, 3090 flow. Second operand 8 states and 137 transitions. [2024-06-21 21:59:25,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 303 transitions, 3962 flow [2024-06-21 21:59:25,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 303 transitions, 3919 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-21 21:59:25,337 INFO L231 Difference]: Finished difference. Result has 218 places, 273 transitions, 3151 flow [2024-06-21 21:59:25,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3047, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3151, PETRI_PLACES=218, PETRI_TRANSITIONS=273} [2024-06-21 21:59:25,337 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 176 predicate places. [2024-06-21 21:59:25,337 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 273 transitions, 3151 flow [2024-06-21 21:59:25,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:59:25,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:59:25,338 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:59:25,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-21 21:59:25,338 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:59:25,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:59:25,338 INFO L85 PathProgramCache]: Analyzing trace with hash 1336319229, now seen corresponding path program 3 times [2024-06-21 21:59:25,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:59:25,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582211820] [2024-06-21 21:59:25,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:59:25,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:59:25,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:59:27,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:59:27,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:59:27,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582211820] [2024-06-21 21:59:27,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582211820] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:59:27,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:59:27,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:59:27,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455097758] [2024-06-21 21:59:27,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:59:27,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:59:27,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:59:27,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:59:27,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:59:27,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 21:59:27,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 273 transitions, 3151 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:59:27,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:59:27,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 21:59:27,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:59:29,420 INFO L124 PetriNetUnfolderBase]: 1925/3169 cut-off events. [2024-06-21 21:59:29,420 INFO L125 PetriNetUnfolderBase]: For 171131/171131 co-relation queries the response was YES. [2024-06-21 21:59:29,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21645 conditions, 3169 events. 1925/3169 cut-off events. For 171131/171131 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 18288 event pairs, 431 based on Foata normal form. 10/3178 useless extension candidates. Maximal degree in co-relation 21541. Up to 2890 conditions per place. [2024-06-21 21:59:29,446 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 266 selfloop transitions, 27 changer transitions 0/298 dead transitions. [2024-06-21 21:59:29,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 298 transitions, 3837 flow [2024-06-21 21:59:29,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:59:29,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:59:29,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-21 21:59:29,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-21 21:59:29,447 INFO L175 Difference]: Start difference. First operand has 218 places, 273 transitions, 3151 flow. Second operand 8 states and 132 transitions. [2024-06-21 21:59:29,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 298 transitions, 3837 flow [2024-06-21 21:59:29,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 298 transitions, 3789 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-21 21:59:29,712 INFO L231 Difference]: Finished difference. Result has 222 places, 273 transitions, 3162 flow [2024-06-21 21:59:29,712 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3103, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3162, PETRI_PLACES=222, PETRI_TRANSITIONS=273} [2024-06-21 21:59:29,713 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 180 predicate places. [2024-06-21 21:59:29,713 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 273 transitions, 3162 flow [2024-06-21 21:59:29,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:59:29,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:59:29,713 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:59:29,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-21 21:59:29,714 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:59:29,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:59:29,714 INFO L85 PathProgramCache]: Analyzing trace with hash -607261711, now seen corresponding path program 4 times [2024-06-21 21:59:29,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:59:29,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942460265] [2024-06-21 21:59:29,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:59:29,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:59:29,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:59:32,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:59:32,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:59:32,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942460265] [2024-06-21 21:59:32,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942460265] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:59:32,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:59:32,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:59:32,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640758656] [2024-06-21 21:59:32,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:59:32,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:59:32,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:59:32,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:59:32,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:59:32,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 21:59:32,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 273 transitions, 3162 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:59:32,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:59:32,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 21:59:32,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:59:33,587 INFO L124 PetriNetUnfolderBase]: 1961/3225 cut-off events. [2024-06-21 21:59:33,587 INFO L125 PetriNetUnfolderBase]: For 176700/176700 co-relation queries the response was YES. [2024-06-21 21:59:33,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22071 conditions, 3225 events. 1961/3225 cut-off events. For 176700/176700 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 18632 event pairs, 443 based on Foata normal form. 10/3234 useless extension candidates. Maximal degree in co-relation 21965. Up to 2955 conditions per place. [2024-06-21 21:59:33,617 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 272 selfloop transitions, 23 changer transitions 0/300 dead transitions. [2024-06-21 21:59:33,617 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 300 transitions, 3876 flow [2024-06-21 21:59:33,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:59:33,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:59:33,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-21 21:59:33,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38482384823848237 [2024-06-21 21:59:33,619 INFO L175 Difference]: Start difference. First operand has 222 places, 273 transitions, 3162 flow. Second operand 9 states and 142 transitions. [2024-06-21 21:59:33,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 300 transitions, 3876 flow [2024-06-21 21:59:33,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 300 transitions, 3817 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-21 21:59:33,918 INFO L231 Difference]: Finished difference. Result has 224 places, 274 transitions, 3178 flow [2024-06-21 21:59:33,918 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3103, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3178, PETRI_PLACES=224, PETRI_TRANSITIONS=274} [2024-06-21 21:59:33,918 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 182 predicate places. [2024-06-21 21:59:33,918 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 274 transitions, 3178 flow [2024-06-21 21:59:33,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:59:33,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:59:33,918 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:59:33,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-21 21:59:33,919 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:59:33,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:59:33,919 INFO L85 PathProgramCache]: Analyzing trace with hash -806563501, now seen corresponding path program 5 times [2024-06-21 21:59:33,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:59:33,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934043740] [2024-06-21 21:59:33,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:59:33,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:59:33,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:59:36,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:59:36,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:59:36,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934043740] [2024-06-21 21:59:36,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934043740] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:59:36,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:59:36,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:59:36,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420700892] [2024-06-21 21:59:36,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:59:36,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:59:36,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:59:36,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:59:36,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:59:36,413 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 21:59:36,413 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 274 transitions, 3178 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:59:36,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:59:36,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 21:59:36,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:59:37,604 INFO L124 PetriNetUnfolderBase]: 1984/3262 cut-off events. [2024-06-21 21:59:37,604 INFO L125 PetriNetUnfolderBase]: For 179343/179343 co-relation queries the response was YES. [2024-06-21 21:59:37,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22284 conditions, 3262 events. 1984/3262 cut-off events. For 179343/179343 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 18875 event pairs, 450 based on Foata normal form. 10/3271 useless extension candidates. Maximal degree in co-relation 22177. Up to 2992 conditions per place. [2024-06-21 21:59:37,636 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 272 selfloop transitions, 22 changer transitions 0/299 dead transitions. [2024-06-21 21:59:37,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 299 transitions, 3888 flow [2024-06-21 21:59:37,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:59:37,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:59:37,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-21 21:59:37,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4181184668989547 [2024-06-21 21:59:37,637 INFO L175 Difference]: Start difference. First operand has 224 places, 274 transitions, 3178 flow. Second operand 7 states and 120 transitions. [2024-06-21 21:59:37,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 299 transitions, 3888 flow [2024-06-21 21:59:37,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 299 transitions, 3835 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-21 21:59:37,944 INFO L231 Difference]: Finished difference. Result has 224 places, 275 transitions, 3200 flow [2024-06-21 21:59:37,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3125, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3200, PETRI_PLACES=224, PETRI_TRANSITIONS=275} [2024-06-21 21:59:37,945 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 182 predicate places. [2024-06-21 21:59:37,945 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 275 transitions, 3200 flow [2024-06-21 21:59:37,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:59:37,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:59:37,945 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:59:37,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-21 21:59:37,945 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:59:37,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:59:37,945 INFO L85 PathProgramCache]: Analyzing trace with hash -806711371, now seen corresponding path program 6 times [2024-06-21 21:59:37,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:59:37,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880912239] [2024-06-21 21:59:37,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:59:37,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:59:37,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:59:40,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:59:40,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:59:40,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880912239] [2024-06-21 21:59:40,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880912239] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:59:40,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:59:40,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:59:40,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991700348] [2024-06-21 21:59:40,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:59:40,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:59:40,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:59:40,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:59:40,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:59:40,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 21:59:40,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 275 transitions, 3200 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:59:40,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:59:40,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 21:59:40,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:59:41,656 INFO L124 PetriNetUnfolderBase]: 1966/3229 cut-off events. [2024-06-21 21:59:41,657 INFO L125 PetriNetUnfolderBase]: For 166207/166207 co-relation queries the response was YES. [2024-06-21 21:59:41,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21664 conditions, 3229 events. 1966/3229 cut-off events. For 166207/166207 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 18595 event pairs, 398 based on Foata normal form. 8/3236 useless extension candidates. Maximal degree in co-relation 21556. Up to 2864 conditions per place. [2024-06-21 21:59:41,690 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 274 selfloop transitions, 27 changer transitions 0/306 dead transitions. [2024-06-21 21:59:41,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 306 transitions, 3932 flow [2024-06-21 21:59:41,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:59:41,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:59:41,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-21 21:59:41,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4425087108013937 [2024-06-21 21:59:41,692 INFO L175 Difference]: Start difference. First operand has 224 places, 275 transitions, 3200 flow. Second operand 7 states and 127 transitions. [2024-06-21 21:59:41,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 306 transitions, 3932 flow [2024-06-21 21:59:41,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 306 transitions, 3875 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-21 21:59:41,974 INFO L231 Difference]: Finished difference. Result has 226 places, 275 transitions, 3201 flow [2024-06-21 21:59:41,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3143, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3201, PETRI_PLACES=226, PETRI_TRANSITIONS=275} [2024-06-21 21:59:41,974 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 184 predicate places. [2024-06-21 21:59:41,974 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 275 transitions, 3201 flow [2024-06-21 21:59:41,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:59:41,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:59:41,975 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:59:41,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-21 21:59:41,975 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:59:41,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:59:41,976 INFO L85 PathProgramCache]: Analyzing trace with hash -599637199, now seen corresponding path program 1 times [2024-06-21 21:59:41,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:59:41,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725043890] [2024-06-21 21:59:41,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:59:41,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:59:41,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:59:45,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:59:45,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:59:45,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725043890] [2024-06-21 21:59:45,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725043890] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:59:45,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:59:45,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:59:45,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728993686] [2024-06-21 21:59:45,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:59:45,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:59:45,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:59:45,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:59:45,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:59:45,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 21:59:45,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 275 transitions, 3201 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:59:45,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:59:45,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 21:59:45,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:59:46,494 INFO L124 PetriNetUnfolderBase]: 1953/3217 cut-off events. [2024-06-21 21:59:46,494 INFO L125 PetriNetUnfolderBase]: For 155163/155163 co-relation queries the response was YES. [2024-06-21 21:59:46,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21190 conditions, 3217 events. 1953/3217 cut-off events. For 155163/155163 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 18605 event pairs, 417 based on Foata normal form. 6/3222 useless extension candidates. Maximal degree in co-relation 21081. Up to 2875 conditions per place. [2024-06-21 21:59:46,528 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 271 selfloop transitions, 27 changer transitions 0/303 dead transitions. [2024-06-21 21:59:46,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 303 transitions, 3927 flow [2024-06-21 21:59:46,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:59:46,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:59:46,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-21 21:59:46,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875338753387534 [2024-06-21 21:59:46,529 INFO L175 Difference]: Start difference. First operand has 226 places, 275 transitions, 3201 flow. Second operand 9 states and 143 transitions. [2024-06-21 21:59:46,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 303 transitions, 3927 flow [2024-06-21 21:59:46,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 303 transitions, 3823 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-21 21:59:46,830 INFO L231 Difference]: Finished difference. Result has 228 places, 275 transitions, 3155 flow [2024-06-21 21:59:46,830 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3097, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3155, PETRI_PLACES=228, PETRI_TRANSITIONS=275} [2024-06-21 21:59:46,831 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 186 predicate places. [2024-06-21 21:59:46,831 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 275 transitions, 3155 flow [2024-06-21 21:59:46,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:59:46,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:59:46,831 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:59:46,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-21 21:59:46,831 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:59:46,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:59:46,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1892523622, now seen corresponding path program 1 times [2024-06-21 21:59:46,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:59:46,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741620761] [2024-06-21 21:59:46,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:59:46,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:59:46,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:59:50,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:59:50,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:59:50,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741620761] [2024-06-21 21:59:50,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741620761] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:59:50,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:59:50,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:59:50,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023128946] [2024-06-21 21:59:50,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:59:50,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:59:50,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:59:50,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:59:50,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:59:50,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 21:59:50,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 275 transitions, 3155 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:59:50,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:59:50,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 21:59:50,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:59:51,797 INFO L124 PetriNetUnfolderBase]: 2021/3326 cut-off events. [2024-06-21 21:59:51,797 INFO L125 PetriNetUnfolderBase]: For 164182/164182 co-relation queries the response was YES. [2024-06-21 21:59:51,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21629 conditions, 3326 events. 2021/3326 cut-off events. For 164182/164182 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 19234 event pairs, 362 based on Foata normal form. 8/3334 useless extension candidates. Maximal degree in co-relation 21520. Up to 2790 conditions per place. [2024-06-21 21:59:51,825 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 273 selfloop transitions, 49 changer transitions 0/327 dead transitions. [2024-06-21 21:59:51,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 327 transitions, 4145 flow [2024-06-21 21:59:51,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:59:51,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:59:51,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 187 transitions. [2024-06-21 21:59:51,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-21 21:59:51,827 INFO L175 Difference]: Start difference. First operand has 228 places, 275 transitions, 3155 flow. Second operand 11 states and 187 transitions. [2024-06-21 21:59:51,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 327 transitions, 4145 flow [2024-06-21 21:59:52,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 327 transitions, 4060 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-21 21:59:52,161 INFO L231 Difference]: Finished difference. Result has 232 places, 278 transitions, 3242 flow [2024-06-21 21:59:52,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3070, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3242, PETRI_PLACES=232, PETRI_TRANSITIONS=278} [2024-06-21 21:59:52,162 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 190 predicate places. [2024-06-21 21:59:52,162 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 278 transitions, 3242 flow [2024-06-21 21:59:52,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:59:52,162 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:59:52,162 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:59:52,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-21 21:59:52,162 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:59:52,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:59:52,163 INFO L85 PathProgramCache]: Analyzing trace with hash 1268635160, now seen corresponding path program 2 times [2024-06-21 21:59:52,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:59:52,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713932413] [2024-06-21 21:59:52,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:59:52,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:59:52,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:59:55,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:59:55,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:59:55,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713932413] [2024-06-21 21:59:55,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713932413] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:59:55,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:59:55,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:59:55,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327567825] [2024-06-21 21:59:55,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:59:55,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:59:55,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:59:55,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:59:55,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:59:55,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 21:59:55,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 278 transitions, 3242 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:59:55,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:59:55,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 21:59:55,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:59:57,184 INFO L124 PetriNetUnfolderBase]: 2108/3459 cut-off events. [2024-06-21 21:59:57,184 INFO L125 PetriNetUnfolderBase]: For 171146/171146 co-relation queries the response was YES. [2024-06-21 21:59:57,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22578 conditions, 3459 events. 2108/3459 cut-off events. For 171146/171146 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 20171 event pairs, 447 based on Foata normal form. 8/3465 useless extension candidates. Maximal degree in co-relation 22468. Up to 3068 conditions per place. [2024-06-21 21:59:57,218 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 276 selfloop transitions, 52 changer transitions 0/333 dead transitions. [2024-06-21 21:59:57,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 333 transitions, 4211 flow [2024-06-21 21:59:57,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:59:57,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:59:57,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 194 transitions. [2024-06-21 21:59:57,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3943089430894309 [2024-06-21 21:59:57,220 INFO L175 Difference]: Start difference. First operand has 232 places, 278 transitions, 3242 flow. Second operand 12 states and 194 transitions. [2024-06-21 21:59:57,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 333 transitions, 4211 flow [2024-06-21 21:59:57,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 333 transitions, 4003 flow, removed 22 selfloop flow, removed 9 redundant places. [2024-06-21 21:59:57,588 INFO L231 Difference]: Finished difference. Result has 236 places, 288 transitions, 3309 flow [2024-06-21 21:59:57,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3049, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3309, PETRI_PLACES=236, PETRI_TRANSITIONS=288} [2024-06-21 21:59:57,589 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 194 predicate places. [2024-06-21 21:59:57,589 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 288 transitions, 3309 flow [2024-06-21 21:59:57,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:59:57,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:59:57,589 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:59:57,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-21 21:59:57,589 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:59:57,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:59:57,590 INFO L85 PathProgramCache]: Analyzing trace with hash 1263220886, now seen corresponding path program 1 times [2024-06-21 21:59:57,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:59:57,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849072433] [2024-06-21 21:59:57,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:59:57,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:59:57,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:00:01,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:00:01,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:00:01,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849072433] [2024-06-21 22:00:01,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849072433] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:00:01,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:00:01,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:00:01,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272852762] [2024-06-21 22:00:01,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:00:01,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:00:01,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:00:01,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:00:01,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:00:01,146 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 22:00:01,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 288 transitions, 3309 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:00:01,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:00:01,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 22:00:01,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:00:02,754 INFO L124 PetriNetUnfolderBase]: 2118/3483 cut-off events. [2024-06-21 22:00:02,755 INFO L125 PetriNetUnfolderBase]: For 159360/159360 co-relation queries the response was YES. [2024-06-21 22:00:02,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22347 conditions, 3483 events. 2118/3483 cut-off events. For 159360/159360 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 20362 event pairs, 457 based on Foata normal form. 2/3485 useless extension candidates. Maximal degree in co-relation 22238. Up to 3083 conditions per place. [2024-06-21 22:00:02,792 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 249 selfloop transitions, 78 changer transitions 0/332 dead transitions. [2024-06-21 22:00:02,792 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 332 transitions, 4261 flow [2024-06-21 22:00:02,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 22:00:02,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 22:00:02,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 184 transitions. [2024-06-21 22:00:02,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4079822616407982 [2024-06-21 22:00:02,794 INFO L175 Difference]: Start difference. First operand has 236 places, 288 transitions, 3309 flow. Second operand 11 states and 184 transitions. [2024-06-21 22:00:02,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 332 transitions, 4261 flow [2024-06-21 22:00:03,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 332 transitions, 4151 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-21 22:00:03,138 INFO L231 Difference]: Finished difference. Result has 240 places, 291 transitions, 3427 flow [2024-06-21 22:00:03,139 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3199, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3427, PETRI_PLACES=240, PETRI_TRANSITIONS=291} [2024-06-21 22:00:03,139 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 198 predicate places. [2024-06-21 22:00:03,139 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 291 transitions, 3427 flow [2024-06-21 22:00:03,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:00:03,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:00:03,140 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:00:03,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-21 22:00:03,140 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:00:03,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:00:03,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1545691460, now seen corresponding path program 3 times [2024-06-21 22:00:03,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:00:03,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091686543] [2024-06-21 22:00:03,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:00:03,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:00:03,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:00:06,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:00:06,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:00:06,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091686543] [2024-06-21 22:00:06,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091686543] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:00:06,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:00:06,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:00:06,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593928041] [2024-06-21 22:00:06,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:00:06,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:00:06,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:00:06,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:00:06,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:00:06,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 22:00:06,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 291 transitions, 3427 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:00:06,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:00:06,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 22:00:06,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:00:08,447 INFO L124 PetriNetUnfolderBase]: 2154/3531 cut-off events. [2024-06-21 22:00:08,447 INFO L125 PetriNetUnfolderBase]: For 178518/178518 co-relation queries the response was YES. [2024-06-21 22:00:08,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23090 conditions, 3531 events. 2154/3531 cut-off events. For 178518/178518 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 20621 event pairs, 458 based on Foata normal form. 8/3539 useless extension candidates. Maximal degree in co-relation 22980. Up to 3132 conditions per place. [2024-06-21 22:00:08,484 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 277 selfloop transitions, 52 changer transitions 0/334 dead transitions. [2024-06-21 22:00:08,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 334 transitions, 4301 flow [2024-06-21 22:00:08,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 22:00:08,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 22:00:08,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 189 transitions. [2024-06-21 22:00:08,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38414634146341464 [2024-06-21 22:00:08,485 INFO L175 Difference]: Start difference. First operand has 240 places, 291 transitions, 3427 flow. Second operand 12 states and 189 transitions. [2024-06-21 22:00:08,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 334 transitions, 4301 flow [2024-06-21 22:00:08,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 334 transitions, 4085 flow, removed 47 selfloop flow, removed 8 redundant places. [2024-06-21 22:00:08,870 INFO L231 Difference]: Finished difference. Result has 247 places, 296 transitions, 3424 flow [2024-06-21 22:00:08,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3215, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3424, PETRI_PLACES=247, PETRI_TRANSITIONS=296} [2024-06-21 22:00:08,870 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 205 predicate places. [2024-06-21 22:00:08,870 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 296 transitions, 3424 flow [2024-06-21 22:00:08,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:00:08,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:00:08,870 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:00:08,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-21 22:00:08,871 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:00:08,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:00:08,871 INFO L85 PathProgramCache]: Analyzing trace with hash 1265721164, now seen corresponding path program 1 times [2024-06-21 22:00:08,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:00:08,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696734041] [2024-06-21 22:00:08,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:00:08,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:00:08,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:00:11,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:00:11,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:00:11,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696734041] [2024-06-21 22:00:11,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696734041] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:00:11,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:00:11,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:00:11,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923226078] [2024-06-21 22:00:11,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:00:11,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:00:11,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:00:11,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:00:11,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:00:11,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 22:00:11,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 296 transitions, 3424 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:00:11,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:00:11,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 22:00:11,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:00:13,526 INFO L124 PetriNetUnfolderBase]: 2175/3564 cut-off events. [2024-06-21 22:00:13,526 INFO L125 PetriNetUnfolderBase]: For 175505/175505 co-relation queries the response was YES. [2024-06-21 22:00:13,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23444 conditions, 3564 events. 2175/3564 cut-off events. For 175505/175505 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 20889 event pairs, 486 based on Foata normal form. 2/3565 useless extension candidates. Maximal degree in co-relation 23330. Up to 3178 conditions per place. [2024-06-21 22:00:13,558 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 268 selfloop transitions, 59 changer transitions 0/332 dead transitions. [2024-06-21 22:00:13,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 332 transitions, 4374 flow [2024-06-21 22:00:13,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:00:13,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:00:13,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-21 22:00:13,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4298780487804878 [2024-06-21 22:00:13,560 INFO L175 Difference]: Start difference. First operand has 247 places, 296 transitions, 3424 flow. Second operand 8 states and 141 transitions. [2024-06-21 22:00:13,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 332 transitions, 4374 flow [2024-06-21 22:00:13,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 332 transitions, 4248 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-21 22:00:13,932 INFO L231 Difference]: Finished difference. Result has 248 places, 300 transitions, 3502 flow [2024-06-21 22:00:13,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3302, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3502, PETRI_PLACES=248, PETRI_TRANSITIONS=300} [2024-06-21 22:00:13,933 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 206 predicate places. [2024-06-21 22:00:13,933 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 300 transitions, 3502 flow [2024-06-21 22:00:13,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:00:13,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:00:13,933 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:00:13,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-21 22:00:13,933 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:00:13,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:00:13,934 INFO L85 PathProgramCache]: Analyzing trace with hash -383268268, now seen corresponding path program 2 times [2024-06-21 22:00:13,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:00:13,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182229169] [2024-06-21 22:00:13,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:00:13,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:00:13,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:00:17,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:00:17,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:00:17,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182229169] [2024-06-21 22:00:17,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182229169] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:00:17,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:00:17,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:00:17,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088749982] [2024-06-21 22:00:17,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:00:17,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:00:17,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:00:17,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:00:17,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:00:17,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 22:00:17,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 300 transitions, 3502 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:00:17,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:00:17,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 22:00:17,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:00:19,024 INFO L124 PetriNetUnfolderBase]: 2183/3582 cut-off events. [2024-06-21 22:00:19,024 INFO L125 PetriNetUnfolderBase]: For 177049/177049 co-relation queries the response was YES. [2024-06-21 22:00:19,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23322 conditions, 3582 events. 2183/3582 cut-off events. For 177049/177049 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 21043 event pairs, 496 based on Foata normal form. 2/3583 useless extension candidates. Maximal degree in co-relation 23207. Up to 3257 conditions per place. [2024-06-21 22:00:19,056 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 267 selfloop transitions, 56 changer transitions 0/328 dead transitions. [2024-06-21 22:00:19,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 328 transitions, 4262 flow [2024-06-21 22:00:19,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:00:19,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:00:19,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-21 22:00:19,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4115853658536585 [2024-06-21 22:00:19,057 INFO L175 Difference]: Start difference. First operand has 248 places, 300 transitions, 3502 flow. Second operand 8 states and 135 transitions. [2024-06-21 22:00:19,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 328 transitions, 4262 flow [2024-06-21 22:00:19,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 328 transitions, 4137 flow, removed 32 selfloop flow, removed 4 redundant places. [2024-06-21 22:00:19,456 INFO L231 Difference]: Finished difference. Result has 252 places, 302 transitions, 3538 flow [2024-06-21 22:00:19,456 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3393, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3538, PETRI_PLACES=252, PETRI_TRANSITIONS=302} [2024-06-21 22:00:19,456 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 210 predicate places. [2024-06-21 22:00:19,457 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 302 transitions, 3538 flow [2024-06-21 22:00:19,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:00:19,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:00:19,457 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:00:19,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-21 22:00:19,457 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:00:19,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:00:19,457 INFO L85 PathProgramCache]: Analyzing trace with hash -391605780, now seen corresponding path program 2 times [2024-06-21 22:00:19,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:00:19,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109223376] [2024-06-21 22:00:19,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:00:19,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:00:19,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:00:22,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:00:22,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:00:22,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109223376] [2024-06-21 22:00:22,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109223376] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:00:22,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:00:22,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:00:22,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136969577] [2024-06-21 22:00:22,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:00:22,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:00:22,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:00:22,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:00:22,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:00:22,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 22:00:22,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 302 transitions, 3538 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:00:22,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:00:22,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 22:00:22,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:00:24,598 INFO L124 PetriNetUnfolderBase]: 2225/3648 cut-off events. [2024-06-21 22:00:24,599 INFO L125 PetriNetUnfolderBase]: For 192376/192376 co-relation queries the response was YES. [2024-06-21 22:00:24,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24196 conditions, 3648 events. 2225/3648 cut-off events. For 192376/192376 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 21470 event pairs, 480 based on Foata normal form. 2/3649 useless extension candidates. Maximal degree in co-relation 24079. Up to 2982 conditions per place. [2024-06-21 22:00:24,638 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 184 selfloop transitions, 163 changer transitions 0/352 dead transitions. [2024-06-21 22:00:24,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 352 transitions, 4930 flow [2024-06-21 22:00:24,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 22:00:24,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 22:00:24,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 200 transitions. [2024-06-21 22:00:24,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4065040650406504 [2024-06-21 22:00:24,639 INFO L175 Difference]: Start difference. First operand has 252 places, 302 transitions, 3538 flow. Second operand 12 states and 200 transitions. [2024-06-21 22:00:24,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 352 transitions, 4930 flow [2024-06-21 22:00:25,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 352 transitions, 4805 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-21 22:00:25,293 INFO L231 Difference]: Finished difference. Result has 258 places, 311 transitions, 3937 flow [2024-06-21 22:00:25,293 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3413, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3937, PETRI_PLACES=258, PETRI_TRANSITIONS=311} [2024-06-21 22:00:25,294 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 216 predicate places. [2024-06-21 22:00:25,294 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 311 transitions, 3937 flow [2024-06-21 22:00:25,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:00:25,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:00:25,294 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:00:25,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-21 22:00:25,294 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:00:25,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:00:25,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1418847324, now seen corresponding path program 3 times [2024-06-21 22:00:25,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:00:25,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793865590] [2024-06-21 22:00:25,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:00:25,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:00:25,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:00:28,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:00:28,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:00:28,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793865590] [2024-06-21 22:00:28,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793865590] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:00:28,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:00:28,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:00:28,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968699437] [2024-06-21 22:00:28,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:00:28,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:00:28,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:00:28,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:00:28,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:00:28,617 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 22:00:28,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 311 transitions, 3937 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:00:28,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:00:28,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 22:00:28,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:00:30,280 INFO L124 PetriNetUnfolderBase]: 2251/3684 cut-off events. [2024-06-21 22:00:30,280 INFO L125 PetriNetUnfolderBase]: For 206901/206901 co-relation queries the response was YES. [2024-06-21 22:00:30,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25415 conditions, 3684 events. 2251/3684 cut-off events. For 206901/206901 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 21663 event pairs, 482 based on Foata normal form. 2/3685 useless extension candidates. Maximal degree in co-relation 25297. Up to 3007 conditions per place. [2024-06-21 22:00:30,319 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 185 selfloop transitions, 163 changer transitions 0/353 dead transitions. [2024-06-21 22:00:30,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 353 transitions, 5273 flow [2024-06-21 22:00:30,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 22:00:30,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 22:00:30,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 185 transitions. [2024-06-21 22:00:30,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41019955654101997 [2024-06-21 22:00:30,321 INFO L175 Difference]: Start difference. First operand has 258 places, 311 transitions, 3937 flow. Second operand 11 states and 185 transitions. [2024-06-21 22:00:30,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 353 transitions, 5273 flow [2024-06-21 22:00:30,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 353 transitions, 4989 flow, removed 85 selfloop flow, removed 6 redundant places. [2024-06-21 22:00:30,887 INFO L231 Difference]: Finished difference. Result has 263 places, 317 transitions, 4121 flow [2024-06-21 22:00:30,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3717, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4121, PETRI_PLACES=263, PETRI_TRANSITIONS=317} [2024-06-21 22:00:30,887 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 221 predicate places. [2024-06-21 22:00:30,887 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 317 transitions, 4121 flow [2024-06-21 22:00:30,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:00:30,887 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:00:30,887 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:00:30,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-21 22:00:30,888 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:00:30,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:00:30,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1268572482, now seen corresponding path program 4 times [2024-06-21 22:00:30,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:00:30,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504784522] [2024-06-21 22:00:30,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:00:30,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:00:30,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:00:34,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:00:34,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:00:34,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504784522] [2024-06-21 22:00:34,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504784522] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:00:34,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:00:34,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:00:34,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994873760] [2024-06-21 22:00:34,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:00:34,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:00:34,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:00:34,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:00:34,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:00:34,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 22:00:34,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 317 transitions, 4121 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:00:34,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:00:34,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 22:00:34,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:00:36,352 INFO L124 PetriNetUnfolderBase]: 2245/3680 cut-off events. [2024-06-21 22:00:36,352 INFO L125 PetriNetUnfolderBase]: For 205650/205650 co-relation queries the response was YES. [2024-06-21 22:00:36,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25381 conditions, 3680 events. 2245/3680 cut-off events. For 205650/205650 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 21737 event pairs, 480 based on Foata normal form. 2/3681 useless extension candidates. Maximal degree in co-relation 25261. Up to 3002 conditions per place. [2024-06-21 22:00:36,392 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 186 selfloop transitions, 164 changer transitions 0/355 dead transitions. [2024-06-21 22:00:36,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 355 transitions, 5197 flow [2024-06-21 22:00:36,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 22:00:36,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 22:00:36,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 209 transitions. [2024-06-21 22:00:36,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3921200750469043 [2024-06-21 22:00:36,394 INFO L175 Difference]: Start difference. First operand has 263 places, 317 transitions, 4121 flow. Second operand 13 states and 209 transitions. [2024-06-21 22:00:36,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 355 transitions, 5197 flow [2024-06-21 22:00:37,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 355 transitions, 4891 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-21 22:00:37,029 INFO L231 Difference]: Finished difference. Result has 269 places, 317 transitions, 4149 flow [2024-06-21 22:00:37,029 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3815, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4149, PETRI_PLACES=269, PETRI_TRANSITIONS=317} [2024-06-21 22:00:37,030 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 227 predicate places. [2024-06-21 22:00:37,030 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 317 transitions, 4149 flow [2024-06-21 22:00:37,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:00:37,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:00:37,030 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:00:37,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-21 22:00:37,031 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:00:37,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:00:37,031 INFO L85 PathProgramCache]: Analyzing trace with hash 1549508428, now seen corresponding path program 3 times [2024-06-21 22:00:37,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:00:37,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460512347] [2024-06-21 22:00:37,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:00:37,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:00:37,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:00:40,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:00:40,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:00:40,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460512347] [2024-06-21 22:00:40,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460512347] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:00:40,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:00:40,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:00:40,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135055077] [2024-06-21 22:00:40,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:00:40,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:00:40,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:00:40,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:00:40,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:00:40,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 22:00:40,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 317 transitions, 4149 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:00:40,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:00:40,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 22:00:40,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:00:41,667 INFO L124 PetriNetUnfolderBase]: 2281/3740 cut-off events. [2024-06-21 22:00:41,668 INFO L125 PetriNetUnfolderBase]: For 211411/211411 co-relation queries the response was YES. [2024-06-21 22:00:41,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25764 conditions, 3740 events. 2281/3740 cut-off events. For 211411/211411 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 22142 event pairs, 501 based on Foata normal form. 2/3742 useless extension candidates. Maximal degree in co-relation 25643. Up to 3403 conditions per place. [2024-06-21 22:00:41,702 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 305 selfloop transitions, 36 changer transitions 0/346 dead transitions. [2024-06-21 22:00:41,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 346 transitions, 4987 flow [2024-06-21 22:00:41,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:00:41,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:00:41,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-21 22:00:41,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40853658536585363 [2024-06-21 22:00:41,703 INFO L175 Difference]: Start difference. First operand has 269 places, 317 transitions, 4149 flow. Second operand 8 states and 134 transitions. [2024-06-21 22:00:41,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 346 transitions, 4987 flow [2024-06-21 22:00:42,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 346 transitions, 4641 flow, removed 3 selfloop flow, removed 12 redundant places. [2024-06-21 22:00:42,397 INFO L231 Difference]: Finished difference. Result has 265 places, 320 transitions, 3927 flow [2024-06-21 22:00:42,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3803, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3927, PETRI_PLACES=265, PETRI_TRANSITIONS=320} [2024-06-21 22:00:42,397 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 223 predicate places. [2024-06-21 22:00:42,397 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 320 transitions, 3927 flow [2024-06-21 22:00:42,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:00:42,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:00:42,397 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:00:42,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-21 22:00:42,398 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:00:42,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:00:42,398 INFO L85 PathProgramCache]: Analyzing trace with hash -285748166, now seen corresponding path program 5 times [2024-06-21 22:00:42,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:00:42,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861380765] [2024-06-21 22:00:42,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:00:42,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:00:42,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:00:45,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:00:45,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:00:45,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861380765] [2024-06-21 22:00:45,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861380765] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:00:45,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:00:45,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:00:45,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557355548] [2024-06-21 22:00:45,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:00:45,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:00:45,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:00:45,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:00:45,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:00:46,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 22:00:46,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 320 transitions, 3927 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:00:46,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:00:46,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 22:00:46,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:00:47,778 INFO L124 PetriNetUnfolderBase]: 2307/3778 cut-off events. [2024-06-21 22:00:47,778 INFO L125 PetriNetUnfolderBase]: For 221231/221231 co-relation queries the response was YES. [2024-06-21 22:00:47,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25832 conditions, 3778 events. 2307/3778 cut-off events. For 221231/221231 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 22385 event pairs, 486 based on Foata normal form. 2/3780 useless extension candidates. Maximal degree in co-relation 25710. Up to 3367 conditions per place. [2024-06-21 22:00:47,813 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 279 selfloop transitions, 74 changer transitions 0/358 dead transitions. [2024-06-21 22:00:47,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 358 transitions, 4937 flow [2024-06-21 22:00:47,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 22:00:47,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 22:00:47,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 189 transitions. [2024-06-21 22:00:47,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38414634146341464 [2024-06-21 22:00:47,815 INFO L175 Difference]: Start difference. First operand has 265 places, 320 transitions, 3927 flow. Second operand 12 states and 189 transitions. [2024-06-21 22:00:47,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 358 transitions, 4937 flow [2024-06-21 22:00:48,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 358 transitions, 4857 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-21 22:00:48,416 INFO L231 Difference]: Finished difference. Result has 271 places, 326 transitions, 4085 flow [2024-06-21 22:00:48,417 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3847, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4085, PETRI_PLACES=271, PETRI_TRANSITIONS=326} [2024-06-21 22:00:48,417 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 229 predicate places. [2024-06-21 22:00:48,417 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 326 transitions, 4085 flow [2024-06-21 22:00:48,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:00:48,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:00:48,418 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:00:48,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-21 22:00:48,418 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:00:48,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:00:48,418 INFO L85 PathProgramCache]: Analyzing trace with hash -292177256, now seen corresponding path program 6 times [2024-06-21 22:00:48,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:00:48,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194207663] [2024-06-21 22:00:48,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:00:48,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:00:48,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:00:51,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:00:51,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:00:51,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194207663] [2024-06-21 22:00:51,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194207663] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:00:51,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:00:51,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:00:51,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115253801] [2024-06-21 22:00:51,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:00:51,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:00:51,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:00:51,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:00:51,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:00:51,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 22:00:51,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 326 transitions, 4085 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:00:51,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:00:51,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 22:00:51,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:00:53,718 INFO L124 PetriNetUnfolderBase]: 2317/3792 cut-off events. [2024-06-21 22:00:53,718 INFO L125 PetriNetUnfolderBase]: For 227562/227562 co-relation queries the response was YES. [2024-06-21 22:00:53,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26113 conditions, 3792 events. 2317/3792 cut-off events. For 227562/227562 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 22415 event pairs, 484 based on Foata normal form. 2/3794 useless extension candidates. Maximal degree in co-relation 25990. Up to 3377 conditions per place. [2024-06-21 22:00:53,754 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 278 selfloop transitions, 77 changer transitions 0/360 dead transitions. [2024-06-21 22:00:53,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 360 transitions, 5066 flow [2024-06-21 22:00:53,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 22:00:53,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 22:00:53,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 177 transitions. [2024-06-21 22:00:53,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3924611973392461 [2024-06-21 22:00:53,756 INFO L175 Difference]: Start difference. First operand has 271 places, 326 transitions, 4085 flow. Second operand 11 states and 177 transitions. [2024-06-21 22:00:53,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 360 transitions, 5066 flow [2024-06-21 22:00:54,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 360 transitions, 4961 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-21 22:00:54,297 INFO L231 Difference]: Finished difference. Result has 274 places, 329 transitions, 4185 flow [2024-06-21 22:00:54,298 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3980, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4185, PETRI_PLACES=274, PETRI_TRANSITIONS=329} [2024-06-21 22:00:54,298 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 232 predicate places. [2024-06-21 22:00:54,298 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 329 transitions, 4185 flow [2024-06-21 22:00:54,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:00:54,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:00:54,299 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:00:54,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-21 22:00:54,299 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:00:54,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:00:54,299 INFO L85 PathProgramCache]: Analyzing trace with hash 1549502786, now seen corresponding path program 7 times [2024-06-21 22:00:54,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:00:54,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470788227] [2024-06-21 22:00:54,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:00:54,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:00:54,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:00:57,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:00:57,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:00:57,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470788227] [2024-06-21 22:00:57,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470788227] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:00:57,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:00:57,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:00:57,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810310596] [2024-06-21 22:00:57,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:00:57,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:00:57,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:00:57,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:00:57,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:00:57,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 22:00:57,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 329 transitions, 4185 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:00:57,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:00:57,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 22:00:57,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:00:59,477 INFO L124 PetriNetUnfolderBase]: 2311/3784 cut-off events. [2024-06-21 22:00:59,478 INFO L125 PetriNetUnfolderBase]: For 227744/227744 co-relation queries the response was YES. [2024-06-21 22:00:59,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26150 conditions, 3784 events. 2311/3784 cut-off events. For 227744/227744 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 22389 event pairs, 483 based on Foata normal form. 2/3786 useless extension candidates. Maximal degree in co-relation 26025. Up to 3372 conditions per place. [2024-06-21 22:00:59,521 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 277 selfloop transitions, 77 changer transitions 0/359 dead transitions. [2024-06-21 22:00:59,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 359 transitions, 4973 flow [2024-06-21 22:00:59,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 22:00:59,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 22:00:59,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 176 transitions. [2024-06-21 22:00:59,523 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-21 22:00:59,523 INFO L175 Difference]: Start difference. First operand has 274 places, 329 transitions, 4185 flow. Second operand 11 states and 176 transitions. [2024-06-21 22:00:59,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 359 transitions, 4973 flow [2024-06-21 22:01:00,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 359 transitions, 4773 flow, removed 24 selfloop flow, removed 9 redundant places. [2024-06-21 22:01:00,223 INFO L231 Difference]: Finished difference. Result has 276 places, 329 transitions, 4145 flow [2024-06-21 22:01:00,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3985, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4145, PETRI_PLACES=276, PETRI_TRANSITIONS=329} [2024-06-21 22:01:00,223 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 234 predicate places. [2024-06-21 22:01:00,223 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 329 transitions, 4145 flow [2024-06-21 22:01:00,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:01:00,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:01:00,224 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:01:00,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-21 22:01:00,224 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:01:00,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:01:00,224 INFO L85 PathProgramCache]: Analyzing trace with hash -445805658, now seen corresponding path program 4 times [2024-06-21 22:01:00,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:01:00,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371604915] [2024-06-21 22:01:00,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:01:00,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:01:00,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:01:03,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:01:03,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:01:03,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371604915] [2024-06-21 22:01:03,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371604915] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:01:03,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:01:03,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:01:03,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089209068] [2024-06-21 22:01:03,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:01:03,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:01:03,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:01:03,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:01:03,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:01:03,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 22:01:03,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 329 transitions, 4145 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:01:03,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:01:03,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 22:01:03,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:01:05,276 INFO L124 PetriNetUnfolderBase]: 2293/3752 cut-off events. [2024-06-21 22:01:05,277 INFO L125 PetriNetUnfolderBase]: For 227260/227260 co-relation queries the response was YES. [2024-06-21 22:01:05,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25385 conditions, 3752 events. 2293/3752 cut-off events. For 227260/227260 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 22001 event pairs, 366 based on Foata normal form. 8/3760 useless extension candidates. Maximal degree in co-relation 25259. Up to 3089 conditions per place. [2024-06-21 22:01:05,318 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 306 selfloop transitions, 64 changer transitions 0/375 dead transitions. [2024-06-21 22:01:05,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 375 transitions, 5059 flow [2024-06-21 22:01:05,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 22:01:05,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 22:01:05,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 174 transitions. [2024-06-21 22:01:05,320 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.424390243902439 [2024-06-21 22:01:05,320 INFO L175 Difference]: Start difference. First operand has 276 places, 329 transitions, 4145 flow. Second operand 10 states and 174 transitions. [2024-06-21 22:01:05,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 375 transitions, 5059 flow [2024-06-21 22:01:05,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 375 transitions, 4887 flow, removed 5 selfloop flow, removed 10 redundant places. [2024-06-21 22:01:05,964 INFO L231 Difference]: Finished difference. Result has 276 places, 329 transitions, 4111 flow [2024-06-21 22:01:05,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3973, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4111, PETRI_PLACES=276, PETRI_TRANSITIONS=329} [2024-06-21 22:01:05,965 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 234 predicate places. [2024-06-21 22:01:05,965 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 329 transitions, 4111 flow [2024-06-21 22:01:05,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:01:05,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:01:05,965 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:01:05,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-21 22:01:05,965 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:01:05,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:01:05,966 INFO L85 PathProgramCache]: Analyzing trace with hash -321234450, now seen corresponding path program 4 times [2024-06-21 22:01:05,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:01:05,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382447280] [2024-06-21 22:01:05,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:01:05,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:01:05,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:01:08,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:01:08,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:01:08,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382447280] [2024-06-21 22:01:08,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382447280] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:01:08,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:01:08,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:01:08,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108942731] [2024-06-21 22:01:08,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:01:08,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:01:08,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:01:08,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:01:08,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:01:08,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 22:01:08,992 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 329 transitions, 4111 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:01:08,992 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:01:08,992 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 22:01:08,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:01:10,442 INFO L124 PetriNetUnfolderBase]: 2314/3791 cut-off events. [2024-06-21 22:01:10,443 INFO L125 PetriNetUnfolderBase]: For 221607/221613 co-relation queries the response was YES. [2024-06-21 22:01:10,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25940 conditions, 3791 events. 2314/3791 cut-off events. For 221607/221613 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 22444 event pairs, 499 based on Foata normal form. 8/3799 useless extension candidates. Maximal degree in co-relation 25813. Up to 3405 conditions per place. [2024-06-21 22:01:10,486 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 300 selfloop transitions, 57 changer transitions 0/362 dead transitions. [2024-06-21 22:01:10,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 362 transitions, 5139 flow [2024-06-21 22:01:10,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:01:10,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:01:10,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-21 22:01:10,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4176829268292683 [2024-06-21 22:01:10,487 INFO L175 Difference]: Start difference. First operand has 276 places, 329 transitions, 4111 flow. Second operand 8 states and 137 transitions. [2024-06-21 22:01:10,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 362 transitions, 5139 flow [2024-06-21 22:01:11,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 362 transitions, 5024 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-21 22:01:11,151 INFO L231 Difference]: Finished difference. Result has 276 places, 333 transitions, 4205 flow [2024-06-21 22:01:11,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4002, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4205, PETRI_PLACES=276, PETRI_TRANSITIONS=333} [2024-06-21 22:01:11,151 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 234 predicate places. [2024-06-21 22:01:11,151 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 333 transitions, 4205 flow [2024-06-21 22:01:11,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:01:11,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:01:11,152 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:01:11,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-21 22:01:11,152 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:01:11,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:01:11,152 INFO L85 PathProgramCache]: Analyzing trace with hash 813625198, now seen corresponding path program 5 times [2024-06-21 22:01:11,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:01:11,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863112529] [2024-06-21 22:01:11,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:01:11,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:01:11,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:01:14,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:01:14,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:01:14,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863112529] [2024-06-21 22:01:14,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863112529] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:01:14,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:01:14,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:01:14,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118233247] [2024-06-21 22:01:14,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:01:14,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:01:14,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:01:14,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:01:14,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:01:14,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 22:01:14,423 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 333 transitions, 4205 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:01:14,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:01:14,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 22:01:14,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:01:16,069 INFO L124 PetriNetUnfolderBase]: 2322/3805 cut-off events. [2024-06-21 22:01:16,069 INFO L125 PetriNetUnfolderBase]: For 212310/212316 co-relation queries the response was YES. [2024-06-21 22:01:16,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25866 conditions, 3805 events. 2322/3805 cut-off events. For 212310/212316 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 22605 event pairs, 505 based on Foata normal form. 8/3813 useless extension candidates. Maximal degree in co-relation 25739. Up to 3458 conditions per place. [2024-06-21 22:01:16,110 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 298 selfloop transitions, 55 changer transitions 0/358 dead transitions. [2024-06-21 22:01:16,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 358 transitions, 5023 flow [2024-06-21 22:01:16,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:01:16,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:01:16,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-21 22:01:16,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39939024390243905 [2024-06-21 22:01:16,111 INFO L175 Difference]: Start difference. First operand has 276 places, 333 transitions, 4205 flow. Second operand 8 states and 131 transitions. [2024-06-21 22:01:16,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 358 transitions, 5023 flow [2024-06-21 22:01:16,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 358 transitions, 4886 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-21 22:01:16,724 INFO L231 Difference]: Finished difference. Result has 280 places, 335 transitions, 4231 flow [2024-06-21 22:01:16,724 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4088, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4231, PETRI_PLACES=280, PETRI_TRANSITIONS=335} [2024-06-21 22:01:16,725 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 238 predicate places. [2024-06-21 22:01:16,725 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 335 transitions, 4231 flow [2024-06-21 22:01:16,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:01:16,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:01:16,725 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:01:16,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-21 22:01:16,725 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:01:16,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:01:16,725 INFO L85 PathProgramCache]: Analyzing trace with hash 1598321102, now seen corresponding path program 8 times [2024-06-21 22:01:16,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:01:16,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982767312] [2024-06-21 22:01:16,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:01:16,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:01:16,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:01:20,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:01:20,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:01:20,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982767312] [2024-06-21 22:01:20,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982767312] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:01:20,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:01:20,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:01:20,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562636684] [2024-06-21 22:01:20,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:01:20,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:01:20,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:01:20,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:01:20,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:01:20,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 22:01:20,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 335 transitions, 4231 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:01:20,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:01:20,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 22:01:20,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:01:21,894 INFO L124 PetriNetUnfolderBase]: 2332/3813 cut-off events. [2024-06-21 22:01:21,894 INFO L125 PetriNetUnfolderBase]: For 216836/216836 co-relation queries the response was YES. [2024-06-21 22:01:21,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26020 conditions, 3813 events. 2332/3813 cut-off events. For 216836/216836 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 22575 event pairs, 517 based on Foata normal form. 2/3814 useless extension candidates. Maximal degree in co-relation 25891. Up to 3311 conditions per place. [2024-06-21 22:01:21,938 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 259 selfloop transitions, 107 changer transitions 0/371 dead transitions. [2024-06-21 22:01:21,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 371 transitions, 5253 flow [2024-06-21 22:01:21,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 22:01:21,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 22:01:21,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 178 transitions. [2024-06-21 22:01:21,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3946784922394678 [2024-06-21 22:01:21,940 INFO L175 Difference]: Start difference. First operand has 280 places, 335 transitions, 4231 flow. Second operand 11 states and 178 transitions. [2024-06-21 22:01:21,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 371 transitions, 5253 flow [2024-06-21 22:01:22,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 371 transitions, 5130 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-21 22:01:22,657 INFO L231 Difference]: Finished difference. Result has 285 places, 338 transitions, 4378 flow [2024-06-21 22:01:22,657 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4108, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4378, PETRI_PLACES=285, PETRI_TRANSITIONS=338} [2024-06-21 22:01:22,657 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 243 predicate places. [2024-06-21 22:01:22,657 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 338 transitions, 4378 flow [2024-06-21 22:01:22,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:01:22,658 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:01:22,658 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:01:22,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-21 22:01:22,658 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:01:22,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:01:22,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1606652972, now seen corresponding path program 9 times [2024-06-21 22:01:22,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:01:22,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794490828] [2024-06-21 22:01:22,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:01:22,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:01:22,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:01:26,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:01:26,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:01:26,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794490828] [2024-06-21 22:01:26,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794490828] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:01:26,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:01:26,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:01:26,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342303358] [2024-06-21 22:01:26,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:01:26,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:01:26,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:01:26,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:01:26,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:01:26,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 22:01:26,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 338 transitions, 4378 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:01:26,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:01:26,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 22:01:26,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:01:28,000 INFO L124 PetriNetUnfolderBase]: 2358/3857 cut-off events. [2024-06-21 22:01:28,000 INFO L125 PetriNetUnfolderBase]: For 228283/228283 co-relation queries the response was YES. [2024-06-21 22:01:28,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26644 conditions, 3857 events. 2358/3857 cut-off events. For 228283/228283 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 22920 event pairs, 519 based on Foata normal form. 2/3858 useless extension candidates. Maximal degree in co-relation 26514. Up to 3336 conditions per place. [2024-06-21 22:01:28,045 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 263 selfloop transitions, 109 changer transitions 0/377 dead transitions. [2024-06-21 22:01:28,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 377 transitions, 5624 flow [2024-06-21 22:01:28,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 22:01:28,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 22:01:28,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 191 transitions. [2024-06-21 22:01:28,047 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3882113821138211 [2024-06-21 22:01:28,047 INFO L175 Difference]: Start difference. First operand has 285 places, 338 transitions, 4378 flow. Second operand 12 states and 191 transitions. [2024-06-21 22:01:28,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 377 transitions, 5624 flow [2024-06-21 22:01:28,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 377 transitions, 5288 flow, removed 40 selfloop flow, removed 9 redundant places. [2024-06-21 22:01:28,796 INFO L231 Difference]: Finished difference. Result has 288 places, 344 transitions, 4378 flow [2024-06-21 22:01:28,797 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4082, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4378, PETRI_PLACES=288, PETRI_TRANSITIONS=344} [2024-06-21 22:01:28,797 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 246 predicate places. [2024-06-21 22:01:28,797 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 344 transitions, 4378 flow [2024-06-21 22:01:28,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:01:28,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:01:28,797 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:01:28,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-21 22:01:28,797 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:01:28,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:01:28,798 INFO L85 PathProgramCache]: Analyzing trace with hash -321111752, now seen corresponding path program 10 times [2024-06-21 22:01:28,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:01:28,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638113547] [2024-06-21 22:01:28,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:01:28,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:01:28,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:01:32,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:01:32,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:01:32,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638113547] [2024-06-21 22:01:32,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638113547] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:01:32,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:01:32,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:01:32,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971775493] [2024-06-21 22:01:32,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:01:32,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:01:32,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:01:32,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:01:32,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:01:32,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 22:01:32,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 344 transitions, 4378 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:01:32,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:01:32,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 22:01:32,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:01:33,736 INFO L124 PetriNetUnfolderBase]: 2352/3853 cut-off events. [2024-06-21 22:01:33,736 INFO L125 PetriNetUnfolderBase]: For 226579/226579 co-relation queries the response was YES. [2024-06-21 22:01:33,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26354 conditions, 3853 events. 2352/3853 cut-off events. For 226579/226579 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 22969 event pairs, 521 based on Foata normal form. 2/3854 useless extension candidates. Maximal degree in co-relation 26223. Up to 3331 conditions per place. [2024-06-21 22:01:33,783 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 260 selfloop transitions, 108 changer transitions 0/373 dead transitions. [2024-06-21 22:01:33,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 373 transitions, 5348 flow [2024-06-21 22:01:33,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 22:01:33,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 22:01:33,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 165 transitions. [2024-06-21 22:01:33,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-21 22:01:33,785 INFO L175 Difference]: Start difference. First operand has 288 places, 344 transitions, 4378 flow. Second operand 10 states and 165 transitions. [2024-06-21 22:01:33,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 373 transitions, 5348 flow [2024-06-21 22:01:34,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 373 transitions, 5101 flow, removed 24 selfloop flow, removed 8 redundant places. [2024-06-21 22:01:34,652 INFO L231 Difference]: Finished difference. Result has 290 places, 344 transitions, 4353 flow [2024-06-21 22:01:34,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4131, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4353, PETRI_PLACES=290, PETRI_TRANSITIONS=344} [2024-06-21 22:01:34,653 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 248 predicate places. [2024-06-21 22:01:34,653 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 344 transitions, 4353 flow [2024-06-21 22:01:34,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:01:34,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:01:34,653 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:01:34,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-21 22:01:34,653 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:01:34,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:01:34,654 INFO L85 PathProgramCache]: Analyzing trace with hash 654809880, now seen corresponding path program 6 times [2024-06-21 22:01:34,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:01:34,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762866094] [2024-06-21 22:01:34,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:01:34,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:01:34,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:01:37,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:01:37,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:01:37,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762866094] [2024-06-21 22:01:37,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762866094] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:01:37,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:01:37,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:01:37,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283830990] [2024-06-21 22:01:37,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:01:37,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:01:37,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:01:37,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:01:37,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:01:37,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 22:01:37,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 344 transitions, 4353 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:01:37,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:01:37,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 22:01:37,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:01:39,318 INFO L124 PetriNetUnfolderBase]: 2360/3871 cut-off events. [2024-06-21 22:01:39,318 INFO L125 PetriNetUnfolderBase]: For 231837/231843 co-relation queries the response was YES. [2024-06-21 22:01:39,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26469 conditions, 3871 events. 2360/3871 cut-off events. For 231837/231843 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 23056 event pairs, 412 based on Foata normal form. 8/3879 useless extension candidates. Maximal degree in co-relation 26337. Up to 3289 conditions per place. [2024-06-21 22:01:39,356 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 296 selfloop transitions, 78 changer transitions 0/379 dead transitions. [2024-06-21 22:01:39,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 379 transitions, 5583 flow [2024-06-21 22:01:39,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:01:39,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:01:39,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-21 22:01:39,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42378048780487804 [2024-06-21 22:01:39,358 INFO L175 Difference]: Start difference. First operand has 290 places, 344 transitions, 4353 flow. Second operand 8 states and 139 transitions. [2024-06-21 22:01:39,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 379 transitions, 5583 flow [2024-06-21 22:01:40,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 379 transitions, 5367 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-21 22:01:40,228 INFO L231 Difference]: Finished difference. Result has 289 places, 348 transitions, 4390 flow [2024-06-21 22:01:40,228 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4137, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4390, PETRI_PLACES=289, PETRI_TRANSITIONS=348} [2024-06-21 22:01:40,228 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 247 predicate places. [2024-06-21 22:01:40,228 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 348 transitions, 4390 flow [2024-06-21 22:01:40,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:01:40,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:01:40,228 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:01:40,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-21 22:01:40,228 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:01:40,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:01:40,229 INFO L85 PathProgramCache]: Analyzing trace with hash -1581996212, now seen corresponding path program 7 times [2024-06-21 22:01:40,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:01:40,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516568978] [2024-06-21 22:01:40,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:01:40,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:01:40,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:01:42,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:01:42,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:01:42,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516568978] [2024-06-21 22:01:42,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516568978] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:01:42,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:01:42,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:01:42,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561335693] [2024-06-21 22:01:42,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:01:42,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:01:42,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:01:42,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:01:42,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:01:43,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 22:01:43,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 348 transitions, 4390 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:01:43,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:01:43,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 22:01:43,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:01:44,512 INFO L124 PetriNetUnfolderBase]: 2368/3883 cut-off events. [2024-06-21 22:01:44,513 INFO L125 PetriNetUnfolderBase]: For 237910/237916 co-relation queries the response was YES. [2024-06-21 22:01:44,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26739 conditions, 3883 events. 2368/3883 cut-off events. For 237910/237916 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 23140 event pairs, 415 based on Foata normal form. 8/3891 useless extension candidates. Maximal degree in co-relation 26606. Up to 3297 conditions per place. [2024-06-21 22:01:44,549 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 290 selfloop transitions, 81 changer transitions 0/376 dead transitions. [2024-06-21 22:01:44,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 376 transitions, 5408 flow [2024-06-21 22:01:44,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:01:44,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:01:44,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-21 22:01:44,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40853658536585363 [2024-06-21 22:01:44,551 INFO L175 Difference]: Start difference. First operand has 289 places, 348 transitions, 4390 flow. Second operand 8 states and 134 transitions. [2024-06-21 22:01:44,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 376 transitions, 5408 flow [2024-06-21 22:01:45,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 376 transitions, 5113 flow, removed 49 selfloop flow, removed 7 redundant places. [2024-06-21 22:01:45,543 INFO L231 Difference]: Finished difference. Result has 290 places, 350 transitions, 4310 flow [2024-06-21 22:01:45,544 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4119, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4310, PETRI_PLACES=290, PETRI_TRANSITIONS=350} [2024-06-21 22:01:45,544 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 248 predicate places. [2024-06-21 22:01:45,544 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 350 transitions, 4310 flow [2024-06-21 22:01:45,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:01:45,544 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:01:45,544 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:01:45,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-21 22:01:45,545 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:01:45,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:01:45,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1211268554, now seen corresponding path program 8 times [2024-06-21 22:01:45,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:01:45,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198167051] [2024-06-21 22:01:45,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:01:45,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:01:45,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:01:48,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:01:48,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:01:48,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198167051] [2024-06-21 22:01:48,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198167051] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:01:48,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:01:48,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:01:48,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385988660] [2024-06-21 22:01:48,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:01:48,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:01:48,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:01:48,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:01:48,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:01:48,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 22:01:48,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 350 transitions, 4310 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:01:48,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:01:48,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 22:01:48,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:01:50,355 INFO L124 PetriNetUnfolderBase]: 2376/3891 cut-off events. [2024-06-21 22:01:50,355 INFO L125 PetriNetUnfolderBase]: For 241270/241276 co-relation queries the response was YES. [2024-06-21 22:01:50,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26396 conditions, 3891 events. 2376/3891 cut-off events. For 241270/241276 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 23185 event pairs, 513 based on Foata normal form. 8/3899 useless extension candidates. Maximal degree in co-relation 26264. Up to 3536 conditions per place. [2024-06-21 22:01:50,399 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 309 selfloop transitions, 57 changer transitions 0/371 dead transitions. [2024-06-21 22:01:50,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 371 transitions, 5128 flow [2024-06-21 22:01:50,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:01:50,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:01:50,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-21 22:01:50,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3871951219512195 [2024-06-21 22:01:50,401 INFO L175 Difference]: Start difference. First operand has 290 places, 350 transitions, 4310 flow. Second operand 8 states and 127 transitions. [2024-06-21 22:01:50,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 371 transitions, 5128 flow [2024-06-21 22:01:51,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 371 transitions, 4988 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-21 22:01:51,319 INFO L231 Difference]: Finished difference. Result has 293 places, 352 transitions, 4325 flow [2024-06-21 22:01:51,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4172, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4325, PETRI_PLACES=293, PETRI_TRANSITIONS=352} [2024-06-21 22:01:51,320 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 251 predicate places. [2024-06-21 22:01:51,320 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 352 transitions, 4325 flow [2024-06-21 22:01:51,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:01:51,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:01:51,321 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:01:51,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-21 22:01:51,321 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:01:51,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:01:51,322 INFO L85 PathProgramCache]: Analyzing trace with hash 1163542348, now seen corresponding path program 9 times [2024-06-21 22:01:51,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:01:51,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270179341] [2024-06-21 22:01:51,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:01:51,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:01:51,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:01:54,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:01:54,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:01:54,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270179341] [2024-06-21 22:01:54,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270179341] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:01:54,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:01:54,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:01:54,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743211442] [2024-06-21 22:01:54,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:01:54,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:01:54,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:01:54,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:01:54,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:01:54,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 22:01:54,169 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 352 transitions, 4325 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:01:54,169 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:01:54,169 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 22:01:54,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:01:55,519 INFO L124 PetriNetUnfolderBase]: 2384/3907 cut-off events. [2024-06-21 22:01:55,519 INFO L125 PetriNetUnfolderBase]: For 246606/246612 co-relation queries the response was YES. [2024-06-21 22:01:55,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26409 conditions, 3907 events. 2384/3907 cut-off events. For 246606/246612 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 23391 event pairs, 513 based on Foata normal form. 8/3915 useless extension candidates. Maximal degree in co-relation 26276. Up to 3522 conditions per place. [2024-06-21 22:01:55,565 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 305 selfloop transitions, 64 changer transitions 0/374 dead transitions. [2024-06-21 22:01:55,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 374 transitions, 5145 flow [2024-06-21 22:01:55,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:01:55,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:01:55,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-21 22:01:55,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-21 22:01:55,566 INFO L175 Difference]: Start difference. First operand has 293 places, 352 transitions, 4325 flow. Second operand 8 states and 128 transitions. [2024-06-21 22:01:55,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 374 transitions, 5145 flow [2024-06-21 22:01:56,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 374 transitions, 5014 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-21 22:01:56,465 INFO L231 Difference]: Finished difference. Result has 295 places, 354 transitions, 4357 flow [2024-06-21 22:01:56,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4194, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4357, PETRI_PLACES=295, PETRI_TRANSITIONS=354} [2024-06-21 22:01:56,466 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 253 predicate places. [2024-06-21 22:01:56,466 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 354 transitions, 4357 flow [2024-06-21 22:01:56,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:01:56,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:01:56,466 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:01:56,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-21 22:01:56,467 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:01:56,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:01:56,467 INFO L85 PathProgramCache]: Analyzing trace with hash 1167892826, now seen corresponding path program 11 times [2024-06-21 22:01:56,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:01:56,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224081680] [2024-06-21 22:01:56,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:01:56,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:01:56,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:01:59,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:01:59,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:01:59,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224081680] [2024-06-21 22:01:59,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224081680] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:01:59,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:01:59,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:01:59,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564139038] [2024-06-21 22:01:59,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:01:59,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:01:59,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:01:59,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:01:59,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:01:59,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 22:01:59,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 354 transitions, 4357 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:01:59,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:01:59,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 22:01:59,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:02:01,470 INFO L124 PetriNetUnfolderBase]: 2410/3945 cut-off events. [2024-06-21 22:02:01,470 INFO L125 PetriNetUnfolderBase]: For 259222/259222 co-relation queries the response was YES. [2024-06-21 22:02:01,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26910 conditions, 3945 events. 2410/3945 cut-off events. For 259222/259222 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 23573 event pairs, 496 based on Foata normal form. 2/3946 useless extension candidates. Maximal degree in co-relation 26776. Up to 3103 conditions per place. [2024-06-21 22:02:01,517 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 183 selfloop transitions, 201 changer transitions 0/389 dead transitions. [2024-06-21 22:02:01,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 389 transitions, 5692 flow [2024-06-21 22:02:01,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:02:01,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:02:01,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-21 22:02:01,518 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-21 22:02:01,519 INFO L175 Difference]: Start difference. First operand has 295 places, 354 transitions, 4357 flow. Second operand 9 states and 153 transitions. [2024-06-21 22:02:01,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 389 transitions, 5692 flow [2024-06-21 22:02:02,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 389 transitions, 5551 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-21 22:02:02,503 INFO L231 Difference]: Finished difference. Result has 298 places, 363 transitions, 4805 flow [2024-06-21 22:02:02,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4216, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=195, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4805, PETRI_PLACES=298, PETRI_TRANSITIONS=363} [2024-06-21 22:02:02,504 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 256 predicate places. [2024-06-21 22:02:02,504 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 363 transitions, 4805 flow [2024-06-21 22:02:02,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:02:02,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:02:02,504 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:02:02,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-21 22:02:02,504 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:02:02,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:02:02,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1899651396, now seen corresponding path program 12 times [2024-06-21 22:02:02,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:02:02,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358324296] [2024-06-21 22:02:02,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:02:02,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:02:02,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:02:05,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:02:05,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:02:05,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358324296] [2024-06-21 22:02:05,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358324296] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:02:05,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:02:05,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:02:05,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158212539] [2024-06-21 22:02:05,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:02:05,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:02:05,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:02:05,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:02:05,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:02:05,608 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 22:02:05,608 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 363 transitions, 4805 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:02:05,608 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:02:05,608 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 22:02:05,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:02:07,252 INFO L124 PetriNetUnfolderBase]: 2420/3959 cut-off events. [2024-06-21 22:02:07,252 INFO L125 PetriNetUnfolderBase]: For 269493/269493 co-relation queries the response was YES. [2024-06-21 22:02:07,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27838 conditions, 3959 events. 2420/3959 cut-off events. For 269493/269493 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 23693 event pairs, 532 based on Foata normal form. 2/3960 useless extension candidates. Maximal degree in co-relation 27703. Up to 3463 conditions per place. [2024-06-21 22:02:07,300 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 281 selfloop transitions, 102 changer transitions 0/388 dead transitions. [2024-06-21 22:02:07,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 388 transitions, 5840 flow [2024-06-21 22:02:07,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:02:07,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:02:07,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-21 22:02:07,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3983739837398374 [2024-06-21 22:02:07,301 INFO L175 Difference]: Start difference. First operand has 298 places, 363 transitions, 4805 flow. Second operand 9 states and 147 transitions. [2024-06-21 22:02:07,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 388 transitions, 5840 flow [2024-06-21 22:02:08,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 388 transitions, 5680 flow, removed 39 selfloop flow, removed 4 redundant places. [2024-06-21 22:02:08,306 INFO L231 Difference]: Finished difference. Result has 303 places, 366 transitions, 4900 flow [2024-06-21 22:02:08,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4645, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4900, PETRI_PLACES=303, PETRI_TRANSITIONS=366} [2024-06-21 22:02:08,306 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 261 predicate places. [2024-06-21 22:02:08,307 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 366 transitions, 4900 flow [2024-06-21 22:02:08,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:02:08,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:02:08,307 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:02:08,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-21 22:02:08,307 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:02:08,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:02:08,307 INFO L85 PathProgramCache]: Analyzing trace with hash -255410182, now seen corresponding path program 13 times [2024-06-21 22:02:08,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:02:08,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432275155] [2024-06-21 22:02:08,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:02:08,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:02:08,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:02:11,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:02:11,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:02:11,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432275155] [2024-06-21 22:02:11,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432275155] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:02:11,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:02:11,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:02:11,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833775399] [2024-06-21 22:02:11,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:02:11,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:02:11,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:02:11,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:02:11,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:02:11,508 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 22:02:11,508 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 366 transitions, 4900 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:02:11,508 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:02:11,508 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 22:02:11,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:02:13,336 INFO L124 PetriNetUnfolderBase]: 2414/3951 cut-off events. [2024-06-21 22:02:13,337 INFO L125 PetriNetUnfolderBase]: For 262376/262376 co-relation queries the response was YES. [2024-06-21 22:02:13,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27150 conditions, 3951 events. 2414/3951 cut-off events. For 262376/262376 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 23648 event pairs, 531 based on Foata normal form. 2/3952 useless extension candidates. Maximal degree in co-relation 27013. Up to 3458 conditions per place. [2024-06-21 22:02:13,386 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 282 selfloop transitions, 103 changer transitions 0/390 dead transitions. [2024-06-21 22:02:13,386 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 390 transitions, 5734 flow [2024-06-21 22:02:13,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 22:02:13,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 22:02:13,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 169 transitions. [2024-06-21 22:02:13,388 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37472283813747226 [2024-06-21 22:02:13,388 INFO L175 Difference]: Start difference. First operand has 303 places, 366 transitions, 4900 flow. Second operand 11 states and 169 transitions. [2024-06-21 22:02:13,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 390 transitions, 5734 flow [2024-06-21 22:02:14,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 390 transitions, 5448 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-21 22:02:14,425 INFO L231 Difference]: Finished difference. Result has 307 places, 366 transitions, 4826 flow [2024-06-21 22:02:14,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4614, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4826, PETRI_PLACES=307, PETRI_TRANSITIONS=366} [2024-06-21 22:02:14,426 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 265 predicate places. [2024-06-21 22:02:14,426 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 366 transitions, 4826 flow [2024-06-21 22:02:14,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:02:14,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:02:14,426 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:02:14,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-21 22:02:14,426 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:02:14,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:02:14,426 INFO L85 PathProgramCache]: Analyzing trace with hash 754121134, now seen corresponding path program 10 times [2024-06-21 22:02:14,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:02:14,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266606803] [2024-06-21 22:02:14,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:02:14,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:02:14,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:02:17,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:02:17,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:02:17,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266606803] [2024-06-21 22:02:17,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266606803] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:02:17,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:02:17,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:02:17,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682698330] [2024-06-21 22:02:17,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:02:17,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:02:17,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:02:17,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:02:17,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:02:17,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 22:02:17,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 366 transitions, 4826 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:02:17,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:02:17,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 22:02:17,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:02:18,543 INFO L124 PetriNetUnfolderBase]: 2409/3938 cut-off events. [2024-06-21 22:02:18,543 INFO L125 PetriNetUnfolderBase]: For 260357/260357 co-relation queries the response was YES. [2024-06-21 22:02:18,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26917 conditions, 3938 events. 2409/3938 cut-off events. For 260357/260357 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 23530 event pairs, 524 based on Foata normal form. 2/3939 useless extension candidates. Maximal degree in co-relation 26779. Up to 3520 conditions per place. [2024-06-21 22:02:18,589 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 322 selfloop transitions, 65 changer transitions 0/392 dead transitions. [2024-06-21 22:02:18,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 392 transitions, 5678 flow [2024-06-21 22:02:18,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:02:18,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:02:18,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-21 22:02:18,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-21 22:02:18,590 INFO L175 Difference]: Start difference. First operand has 307 places, 366 transitions, 4826 flow. Second operand 7 states and 126 transitions. [2024-06-21 22:02:18,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 392 transitions, 5678 flow [2024-06-21 22:02:19,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 392 transitions, 5454 flow, removed 7 selfloop flow, removed 10 redundant places. [2024-06-21 22:02:19,630 INFO L231 Difference]: Finished difference. Result has 304 places, 366 transitions, 4741 flow [2024-06-21 22:02:19,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4602, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4741, PETRI_PLACES=304, PETRI_TRANSITIONS=366} [2024-06-21 22:02:19,630 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 262 predicate places. [2024-06-21 22:02:19,630 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 366 transitions, 4741 flow [2024-06-21 22:02:19,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:02:19,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:02:19,631 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:02:19,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-21 22:02:19,631 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:02:19,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:02:19,631 INFO L85 PathProgramCache]: Analyzing trace with hash 761739694, now seen corresponding path program 11 times [2024-06-21 22:02:19,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:02:19,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812271767] [2024-06-21 22:02:19,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:02:19,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:02:19,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:02:22,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:02:22,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:02:22,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812271767] [2024-06-21 22:02:22,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812271767] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:02:22,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:02:22,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:02:22,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256251801] [2024-06-21 22:02:22,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:02:22,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:02:22,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:02:22,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:02:22,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:02:22,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 22:02:22,388 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 366 transitions, 4741 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:02:22,388 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:02:22,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 22:02:22,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:02:23,613 INFO L124 PetriNetUnfolderBase]: 2404/3933 cut-off events. [2024-06-21 22:02:23,614 INFO L125 PetriNetUnfolderBase]: For 258294/258294 co-relation queries the response was YES. [2024-06-21 22:02:23,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26702 conditions, 3933 events. 2404/3933 cut-off events. For 258294/258294 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 23430 event pairs, 414 based on Foata normal form. 2/3934 useless extension candidates. Maximal degree in co-relation 26563. Up to 3210 conditions per place. [2024-06-21 22:02:23,660 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 310 selfloop transitions, 82 changer transitions 0/397 dead transitions. [2024-06-21 22:02:23,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 397 transitions, 5823 flow [2024-06-21 22:02:23,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:02:23,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:02:23,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-21 22:02:23,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4564459930313589 [2024-06-21 22:02:23,661 INFO L175 Difference]: Start difference. First operand has 304 places, 366 transitions, 4741 flow. Second operand 7 states and 131 transitions. [2024-06-21 22:02:23,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 397 transitions, 5823 flow [2024-06-21 22:02:24,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 397 transitions, 5665 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-21 22:02:24,692 INFO L231 Difference]: Finished difference. Result has 305 places, 366 transitions, 4755 flow [2024-06-21 22:02:24,692 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4583, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4755, PETRI_PLACES=305, PETRI_TRANSITIONS=366} [2024-06-21 22:02:24,693 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 263 predicate places. [2024-06-21 22:02:24,693 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 366 transitions, 4755 flow [2024-06-21 22:02:24,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:02:24,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:02:24,693 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:02:24,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-21 22:02:24,694 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:02:24,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:02:24,694 INFO L85 PathProgramCache]: Analyzing trace with hash -441988690, now seen corresponding path program 12 times [2024-06-21 22:02:24,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:02:24,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112166343] [2024-06-21 22:02:24,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:02:24,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:02:24,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:02:27,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:02:27,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:02:27,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112166343] [2024-06-21 22:02:27,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112166343] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:02:27,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:02:27,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:02:27,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515585617] [2024-06-21 22:02:27,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:02:27,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:02:27,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:02:27,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:02:27,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:02:27,691 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 22:02:27,692 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 366 transitions, 4755 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:02:27,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:02:27,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 22:02:27,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:02:29,580 INFO L124 PetriNetUnfolderBase]: 2399/3928 cut-off events. [2024-06-21 22:02:29,580 INFO L125 PetriNetUnfolderBase]: For 256608/256608 co-relation queries the response was YES. [2024-06-21 22:02:29,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26665 conditions, 3928 events. 2399/3928 cut-off events. For 256608/256608 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 23494 event pairs, 499 based on Foata normal form. 2/3930 useless extension candidates. Maximal degree in co-relation 26525. Up to 3302 conditions per place. [2024-06-21 22:02:29,627 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 330 selfloop transitions, 74 changer transitions 0/409 dead transitions. [2024-06-21 22:02:29,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 409 transitions, 5729 flow [2024-06-21 22:02:29,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:02:29,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:02:29,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-21 22:02:29,631 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44715447154471544 [2024-06-21 22:02:29,631 INFO L175 Difference]: Start difference. First operand has 305 places, 366 transitions, 4755 flow. Second operand 9 states and 165 transitions. [2024-06-21 22:02:29,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 409 transitions, 5729 flow [2024-06-21 22:02:30,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 409 transitions, 5525 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-21 22:02:30,675 INFO L231 Difference]: Finished difference. Result has 308 places, 366 transitions, 4723 flow [2024-06-21 22:02:30,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4551, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4723, PETRI_PLACES=308, PETRI_TRANSITIONS=366} [2024-06-21 22:02:30,675 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 266 predicate places. [2024-06-21 22:02:30,675 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 366 transitions, 4723 flow [2024-06-21 22:02:30,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:02:30,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:02:30,676 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:02:30,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-21 22:02:30,676 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:02:30,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:02:30,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1645488930, now seen corresponding path program 14 times [2024-06-21 22:02:30,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:02:30,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140641158] [2024-06-21 22:02:30,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:02:30,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:02:30,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:02:33,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:02:33,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:02:33,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140641158] [2024-06-21 22:02:33,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140641158] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:02:33,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:02:33,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:02:33,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022354652] [2024-06-21 22:02:33,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:02:33,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:02:33,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:02:33,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:02:33,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:02:33,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 22:02:33,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 366 transitions, 4723 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:02:33,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:02:33,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 22:02:33,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:02:35,046 INFO L124 PetriNetUnfolderBase]: 2441/3996 cut-off events. [2024-06-21 22:02:35,046 INFO L125 PetriNetUnfolderBase]: For 278575/278575 co-relation queries the response was YES. [2024-06-21 22:02:35,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27580 conditions, 3996 events. 2441/3996 cut-off events. For 278575/278575 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 23939 event pairs, 483 based on Foata normal form. 2/3997 useless extension candidates. Maximal degree in co-relation 27439. Up to 3263 conditions per place. [2024-06-21 22:02:35,094 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 235 selfloop transitions, 162 changer transitions 0/402 dead transitions. [2024-06-21 22:02:35,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 402 transitions, 6126 flow [2024-06-21 22:02:35,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 22:02:35,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 22:02:35,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 165 transitions. [2024-06-21 22:02:35,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-21 22:02:35,096 INFO L175 Difference]: Start difference. First operand has 308 places, 366 transitions, 4723 flow. Second operand 10 states and 165 transitions. [2024-06-21 22:02:35,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 402 transitions, 6126 flow [2024-06-21 22:02:36,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 402 transitions, 5944 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-21 22:02:36,206 INFO L231 Difference]: Finished difference. Result has 309 places, 375 transitions, 5070 flow [2024-06-21 22:02:36,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4549, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5070, PETRI_PLACES=309, PETRI_TRANSITIONS=375} [2024-06-21 22:02:36,207 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 267 predicate places. [2024-06-21 22:02:36,207 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 375 transitions, 5070 flow [2024-06-21 22:02:36,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:02:36,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:02:36,208 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:02:36,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-21 22:02:36,208 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:02:36,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:02:36,208 INFO L85 PathProgramCache]: Analyzing trace with hash -435674982, now seen corresponding path program 15 times [2024-06-21 22:02:36,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:02:36,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084457267] [2024-06-21 22:02:36,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:02:36,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:02:36,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:02:39,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:02:39,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:02:39,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084457267] [2024-06-21 22:02:39,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084457267] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:02:39,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:02:39,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:02:39,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125710307] [2024-06-21 22:02:39,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:02:39,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:02:39,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:02:39,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:02:39,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:02:39,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 22:02:39,804 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 375 transitions, 5070 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:02:39,804 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:02:39,804 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 22:02:39,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:02:41,415 INFO L124 PetriNetUnfolderBase]: 2435/3988 cut-off events. [2024-06-21 22:02:41,415 INFO L125 PetriNetUnfolderBase]: For 267117/267117 co-relation queries the response was YES. [2024-06-21 22:02:41,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27464 conditions, 3988 events. 2435/3988 cut-off events. For 267117/267117 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 23880 event pairs, 494 based on Foata normal form. 2/3990 useless extension candidates. Maximal degree in co-relation 27323. Up to 3607 conditions per place. [2024-06-21 22:02:41,459 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 344 selfloop transitions, 51 changer transitions 0/400 dead transitions. [2024-06-21 22:02:41,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 400 transitions, 5930 flow [2024-06-21 22:02:41,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:02:41,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:02:41,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-21 22:02:41,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4054878048780488 [2024-06-21 22:02:41,460 INFO L175 Difference]: Start difference. First operand has 309 places, 375 transitions, 5070 flow. Second operand 8 states and 133 transitions. [2024-06-21 22:02:41,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 400 transitions, 5930 flow [2024-06-21 22:02:42,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 400 transitions, 5466 flow, removed 52 selfloop flow, removed 7 redundant places. [2024-06-21 22:02:42,544 INFO L231 Difference]: Finished difference. Result has 310 places, 375 transitions, 4718 flow [2024-06-21 22:02:42,544 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4606, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4718, PETRI_PLACES=310, PETRI_TRANSITIONS=375} [2024-06-21 22:02:42,544 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 268 predicate places. [2024-06-21 22:02:42,545 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 375 transitions, 4718 flow [2024-06-21 22:02:42,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:02:42,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:02:42,545 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:02:42,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-21 22:02:42,545 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:02:42,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:02:42,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1822620450, now seen corresponding path program 16 times [2024-06-21 22:02:42,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:02:42,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675657880] [2024-06-21 22:02:42,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:02:42,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:02:42,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:02:45,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:02:45,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:02:45,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675657880] [2024-06-21 22:02:45,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675657880] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:02:45,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:02:45,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:02:45,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111335758] [2024-06-21 22:02:45,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:02:45,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:02:45,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:02:45,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:02:45,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:02:45,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 22:02:45,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 375 transitions, 4718 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:02:45,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:02:45,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 22:02:45,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:02:48,184 INFO L124 PetriNetUnfolderBase]: 2429/3984 cut-off events. [2024-06-21 22:02:48,184 INFO L125 PetriNetUnfolderBase]: For 260795/260795 co-relation queries the response was YES. [2024-06-21 22:02:48,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26720 conditions, 3984 events. 2429/3984 cut-off events. For 260795/260795 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 23908 event pairs, 476 based on Foata normal form. 2/3985 useless extension candidates. Maximal degree in co-relation 26578. Up to 3253 conditions per place. [2024-06-21 22:02:48,231 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 235 selfloop transitions, 164 changer transitions 0/404 dead transitions. [2024-06-21 22:02:48,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 404 transitions, 5938 flow [2024-06-21 22:02:48,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 22:02:48,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 22:02:48,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 179 transitions. [2024-06-21 22:02:48,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968957871396896 [2024-06-21 22:02:48,233 INFO L175 Difference]: Start difference. First operand has 310 places, 375 transitions, 4718 flow. Second operand 11 states and 179 transitions. [2024-06-21 22:02:48,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 404 transitions, 5938 flow [2024-06-21 22:02:49,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 404 transitions, 5645 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-21 22:02:49,388 INFO L231 Difference]: Finished difference. Result has 312 places, 375 transitions, 4759 flow [2024-06-21 22:02:49,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4425, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4759, PETRI_PLACES=312, PETRI_TRANSITIONS=375} [2024-06-21 22:02:49,389 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 270 predicate places. [2024-06-21 22:02:49,389 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 375 transitions, 4759 flow [2024-06-21 22:02:49,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:02:49,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:02:49,389 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:02:49,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-21 22:02:49,389 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:02:49,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:02:49,390 INFO L85 PathProgramCache]: Analyzing trace with hash 754125722, now seen corresponding path program 17 times [2024-06-21 22:02:49,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:02:49,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699179091] [2024-06-21 22:02:49,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:02:49,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:02:49,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:02:52,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:02:52,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:02:52,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699179091] [2024-06-21 22:02:52,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699179091] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:02:52,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:02:52,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:02:52,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55233467] [2024-06-21 22:02:52,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:02:52,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:02:52,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:02:52,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:02:52,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:02:52,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 22:02:52,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 375 transitions, 4759 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:02:52,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:02:52,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 22:02:52,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:02:54,427 INFO L124 PetriNetUnfolderBase]: 2439/3992 cut-off events. [2024-06-21 22:02:54,427 INFO L125 PetriNetUnfolderBase]: For 266842/266842 co-relation queries the response was YES. [2024-06-21 22:02:54,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27004 conditions, 3992 events. 2439/3992 cut-off events. For 266842/266842 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 23938 event pairs, 532 based on Foata normal form. 2/3993 useless extension candidates. Maximal degree in co-relation 26862. Up to 3526 conditions per place. [2024-06-21 22:02:54,468 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 322 selfloop transitions, 77 changer transitions 0/404 dead transitions. [2024-06-21 22:02:54,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 404 transitions, 5860 flow [2024-06-21 22:02:54,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:02:54,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:02:54,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-21 22:02:54,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42073170731707316 [2024-06-21 22:02:54,470 INFO L175 Difference]: Start difference. First operand has 312 places, 375 transitions, 4759 flow. Second operand 8 states and 138 transitions. [2024-06-21 22:02:54,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 404 transitions, 5860 flow [2024-06-21 22:02:55,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 404 transitions, 5416 flow, removed 27 selfloop flow, removed 8 redundant places. [2024-06-21 22:02:55,786 INFO L231 Difference]: Finished difference. Result has 312 places, 378 transitions, 4526 flow [2024-06-21 22:02:55,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4321, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4526, PETRI_PLACES=312, PETRI_TRANSITIONS=378} [2024-06-21 22:02:55,786 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 270 predicate places. [2024-06-21 22:02:55,786 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 378 transitions, 4526 flow [2024-06-21 22:02:55,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:02:55,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:02:55,787 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:02:55,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-21 22:02:55,787 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:02:55,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:02:55,787 INFO L85 PathProgramCache]: Analyzing trace with hash 754115492, now seen corresponding path program 18 times [2024-06-21 22:02:55,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:02:55,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774960297] [2024-06-21 22:02:55,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:02:55,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:02:55,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:02:59,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:02:59,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:02:59,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774960297] [2024-06-21 22:02:59,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774960297] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:02:59,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:02:59,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:02:59,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45189253] [2024-06-21 22:02:59,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:02:59,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:02:59,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:02:59,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:02:59,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:02:59,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 22:02:59,075 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 378 transitions, 4526 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:02:59,075 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:02:59,075 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 22:02:59,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:03:00,782 INFO L124 PetriNetUnfolderBase]: 2433/3986 cut-off events. [2024-06-21 22:03:00,782 INFO L125 PetriNetUnfolderBase]: For 263583/263583 co-relation queries the response was YES. [2024-06-21 22:03:00,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26041 conditions, 3986 events. 2433/3986 cut-off events. For 263583/263583 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 23915 event pairs, 531 based on Foata normal form. 2/3987 useless extension candidates. Maximal degree in co-relation 25899. Up to 3521 conditions per place. [2024-06-21 22:03:00,831 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 324 selfloop transitions, 80 changer transitions 0/409 dead transitions. [2024-06-21 22:03:00,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 409 transitions, 5422 flow [2024-06-21 22:03:00,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 22:03:00,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 22:03:00,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 165 transitions. [2024-06-21 22:03:00,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-21 22:03:00,832 INFO L175 Difference]: Start difference. First operand has 312 places, 378 transitions, 4526 flow. Second operand 10 states and 165 transitions. [2024-06-21 22:03:00,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 409 transitions, 5422 flow [2024-06-21 22:03:02,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 409 transitions, 5140 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-21 22:03:02,007 INFO L231 Difference]: Finished difference. Result has 315 places, 378 transitions, 4410 flow [2024-06-21 22:03:02,007 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4244, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4410, PETRI_PLACES=315, PETRI_TRANSITIONS=378} [2024-06-21 22:03:02,007 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 273 predicate places. [2024-06-21 22:03:02,008 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 378 transitions, 4410 flow [2024-06-21 22:03:02,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:02,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:03:02,008 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:03:02,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-21 22:03:02,008 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:03:02,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:03:02,009 INFO L85 PathProgramCache]: Analyzing trace with hash 766090172, now seen corresponding path program 19 times [2024-06-21 22:03:02,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:03:02,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456154380] [2024-06-21 22:03:02,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:03:02,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:03:02,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:03:05,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:03:05,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:03:05,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456154380] [2024-06-21 22:03:05,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456154380] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:03:05,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:03:05,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:03:05,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797546022] [2024-06-21 22:03:05,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:03:05,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:03:05,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:03:05,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:03:05,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:03:05,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 22:03:05,177 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 378 transitions, 4410 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:05,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:03:05,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 22:03:05,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:03:06,835 INFO L124 PetriNetUnfolderBase]: 2427/3978 cut-off events. [2024-06-21 22:03:06,835 INFO L125 PetriNetUnfolderBase]: For 259528/259528 co-relation queries the response was YES. [2024-06-21 22:03:06,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25758 conditions, 3978 events. 2427/3978 cut-off events. For 259528/259528 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 23935 event pairs, 497 based on Foata normal form. 2/3979 useless extension candidates. Maximal degree in co-relation 25615. Up to 3253 conditions per place. [2024-06-21 22:03:06,883 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 239 selfloop transitions, 159 changer transitions 0/403 dead transitions. [2024-06-21 22:03:06,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 403 transitions, 5632 flow [2024-06-21 22:03:06,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:03:06,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:03:06,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-21 22:03:06,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42378048780487804 [2024-06-21 22:03:06,884 INFO L175 Difference]: Start difference. First operand has 315 places, 378 transitions, 4410 flow. Second operand 8 states and 139 transitions. [2024-06-21 22:03:06,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 403 transitions, 5632 flow [2024-06-21 22:03:08,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 403 transitions, 5420 flow, removed 12 selfloop flow, removed 10 redundant places. [2024-06-21 22:03:08,202 INFO L231 Difference]: Finished difference. Result has 313 places, 378 transitions, 4522 flow [2024-06-21 22:03:08,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4198, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4522, PETRI_PLACES=313, PETRI_TRANSITIONS=378} [2024-06-21 22:03:08,202 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 271 predicate places. [2024-06-21 22:03:08,202 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 378 transitions, 4522 flow [2024-06-21 22:03:08,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:08,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:03:08,203 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:03:08,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-21 22:03:08,203 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:03:08,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:03:08,203 INFO L85 PathProgramCache]: Analyzing trace with hash -435555012, now seen corresponding path program 20 times [2024-06-21 22:03:08,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:03:08,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17794522] [2024-06-21 22:03:08,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:03:08,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:03:08,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:03:11,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:03:11,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:03:11,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17794522] [2024-06-21 22:03:11,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17794522] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:03:11,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:03:11,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:03:11,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727004873] [2024-06-21 22:03:11,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:03:11,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:03:11,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:03:11,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:03:11,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:03:11,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 22:03:11,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 378 transitions, 4522 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:11,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:03:11,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 22:03:11,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:03:13,323 INFO L124 PetriNetUnfolderBase]: 2421/3978 cut-off events. [2024-06-21 22:03:13,323 INFO L125 PetriNetUnfolderBase]: For 256993/256993 co-relation queries the response was YES. [2024-06-21 22:03:13,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25807 conditions, 3978 events. 2421/3978 cut-off events. For 256993/256993 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 23993 event pairs, 490 based on Foata normal form. 2/3980 useless extension candidates. Maximal degree in co-relation 25663. Up to 3340 conditions per place. [2024-06-21 22:03:13,369 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 269 selfloop transitions, 140 changer transitions 0/414 dead transitions. [2024-06-21 22:03:13,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 414 transitions, 5622 flow [2024-06-21 22:03:13,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 22:03:13,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 22:03:13,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 171 transitions. [2024-06-21 22:03:13,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4170731707317073 [2024-06-21 22:03:13,371 INFO L175 Difference]: Start difference. First operand has 313 places, 378 transitions, 4522 flow. Second operand 10 states and 171 transitions. [2024-06-21 22:03:13,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 414 transitions, 5622 flow [2024-06-21 22:03:14,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 414 transitions, 5157 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-21 22:03:14,577 INFO L231 Difference]: Finished difference. Result has 315 places, 378 transitions, 4347 flow [2024-06-21 22:03:14,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4057, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4347, PETRI_PLACES=315, PETRI_TRANSITIONS=378} [2024-06-21 22:03:14,577 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 273 predicate places. [2024-06-21 22:03:14,577 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 378 transitions, 4347 flow [2024-06-21 22:03:14,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:14,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:03:14,578 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:03:14,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-21 22:03:14,578 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:03:14,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:03:14,579 INFO L85 PathProgramCache]: Analyzing trace with hash -929035088, now seen corresponding path program 21 times [2024-06-21 22:03:14,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:03:14,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422580086] [2024-06-21 22:03:14,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:03:14,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:03:14,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:03:17,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:03:17,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:03:17,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422580086] [2024-06-21 22:03:17,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422580086] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:03:17,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:03:17,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:03:17,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106413402] [2024-06-21 22:03:17,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:03:17,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:03:17,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:03:17,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:03:17,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:03:18,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 22:03:18,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 378 transitions, 4347 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:18,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:03:18,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 22:03:18,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:03:19,895 INFO L124 PetriNetUnfolderBase]: 2431/3992 cut-off events. [2024-06-21 22:03:19,895 INFO L125 PetriNetUnfolderBase]: For 261813/261813 co-relation queries the response was YES. [2024-06-21 22:03:19,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25531 conditions, 3992 events. 2431/3992 cut-off events. For 261813/261813 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 24038 event pairs, 486 based on Foata normal form. 2/3994 useless extension candidates. Maximal degree in co-relation 25387. Up to 3350 conditions per place. [2024-06-21 22:03:19,941 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 277 selfloop transitions, 143 changer transitions 0/425 dead transitions. [2024-06-21 22:03:19,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 425 transitions, 5549 flow [2024-06-21 22:03:19,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 22:03:19,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 22:03:19,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 203 transitions. [2024-06-21 22:03:19,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41260162601626016 [2024-06-21 22:03:19,942 INFO L175 Difference]: Start difference. First operand has 315 places, 378 transitions, 4347 flow. Second operand 12 states and 203 transitions. [2024-06-21 22:03:19,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 425 transitions, 5549 flow [2024-06-21 22:03:21,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 425 transitions, 5282 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-21 22:03:21,308 INFO L231 Difference]: Finished difference. Result has 318 places, 381 transitions, 4432 flow [2024-06-21 22:03:21,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4085, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4432, PETRI_PLACES=318, PETRI_TRANSITIONS=381} [2024-06-21 22:03:21,309 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 276 predicate places. [2024-06-21 22:03:21,309 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 381 transitions, 4432 flow [2024-06-21 22:03:21,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:21,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:03:21,309 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:03:21,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-21 22:03:21,309 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:03:21,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:03:21,309 INFO L85 PathProgramCache]: Analyzing trace with hash -441994332, now seen corresponding path program 22 times [2024-06-21 22:03:21,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:03:21,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103153468] [2024-06-21 22:03:21,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:03:21,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:03:21,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:03:24,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:03:24,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:03:24,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103153468] [2024-06-21 22:03:24,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103153468] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:03:24,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:03:24,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:03:24,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422014301] [2024-06-21 22:03:24,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:03:24,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:03:24,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:03:24,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:03:24,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:03:24,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 22:03:24,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 381 transitions, 4432 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:24,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:03:24,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 22:03:24,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:03:26,847 INFO L124 PetriNetUnfolderBase]: 2425/3984 cut-off events. [2024-06-21 22:03:26,847 INFO L125 PetriNetUnfolderBase]: For 253894/253894 co-relation queries the response was YES. [2024-06-21 22:03:26,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25299 conditions, 3984 events. 2425/3984 cut-off events. For 253894/253894 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 24007 event pairs, 485 based on Foata normal form. 2/3986 useless extension candidates. Maximal degree in co-relation 25155. Up to 3345 conditions per place. [2024-06-21 22:03:26,897 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 274 selfloop transitions, 150 changer transitions 0/429 dead transitions. [2024-06-21 22:03:26,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 429 transitions, 5416 flow [2024-06-21 22:03:26,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 22:03:26,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 22:03:26,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 218 transitions. [2024-06-21 22:03:26,898 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4090056285178236 [2024-06-21 22:03:26,898 INFO L175 Difference]: Start difference. First operand has 318 places, 381 transitions, 4432 flow. Second operand 13 states and 218 transitions. [2024-06-21 22:03:26,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 429 transitions, 5416 flow [2024-06-21 22:03:28,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 429 transitions, 4947 flow, removed 25 selfloop flow, removed 13 redundant places. [2024-06-21 22:03:28,220 INFO L231 Difference]: Finished difference. Result has 318 places, 381 transitions, 4273 flow [2024-06-21 22:03:28,220 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3963, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4273, PETRI_PLACES=318, PETRI_TRANSITIONS=381} [2024-06-21 22:03:28,220 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 276 predicate places. [2024-06-21 22:03:28,220 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 381 transitions, 4273 flow [2024-06-21 22:03:28,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:28,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:03:28,221 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:03:28,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-21 22:03:28,221 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:03:28,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:03:28,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1133707691, now seen corresponding path program 1 times [2024-06-21 22:03:28,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:03:28,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474616327] [2024-06-21 22:03:28,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:03:28,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:03:28,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:03:31,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:03:31,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:03:31,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474616327] [2024-06-21 22:03:31,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474616327] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:03:31,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:03:31,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:03:31,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353580944] [2024-06-21 22:03:31,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:03:31,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:03:31,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:03:31,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:03:31,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:03:31,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 22:03:31,621 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 381 transitions, 4273 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:31,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:03:31,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 22:03:31,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:03:33,248 INFO L124 PetriNetUnfolderBase]: 2524/4141 cut-off events. [2024-06-21 22:03:33,248 INFO L125 PetriNetUnfolderBase]: For 329835/329835 co-relation queries the response was YES. [2024-06-21 22:03:33,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27573 conditions, 4141 events. 2524/4141 cut-off events. For 329835/329835 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 24944 event pairs, 422 based on Foata normal form. 6/4147 useless extension candidates. Maximal degree in co-relation 27429. Up to 3297 conditions per place. [2024-06-21 22:03:33,299 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 380 selfloop transitions, 54 changer transitions 0/439 dead transitions. [2024-06-21 22:03:33,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 439 transitions, 5813 flow [2024-06-21 22:03:33,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 22:03:33,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 22:03:33,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 183 transitions. [2024-06-21 22:03:33,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44634146341463415 [2024-06-21 22:03:33,301 INFO L175 Difference]: Start difference. First operand has 318 places, 381 transitions, 4273 flow. Second operand 10 states and 183 transitions. [2024-06-21 22:03:33,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 439 transitions, 5813 flow [2024-06-21 22:03:34,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 439 transitions, 5455 flow, removed 3 selfloop flow, removed 14 redundant places. [2024-06-21 22:03:34,415 INFO L231 Difference]: Finished difference. Result has 314 places, 384 transitions, 4099 flow [2024-06-21 22:03:34,415 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3919, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4099, PETRI_PLACES=314, PETRI_TRANSITIONS=384} [2024-06-21 22:03:34,415 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 272 predicate places. [2024-06-21 22:03:34,416 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 384 transitions, 4099 flow [2024-06-21 22:03:34,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:34,416 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:03:34,416 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:03:34,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-21 22:03:34,416 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:03:34,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:03:34,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1461315491, now seen corresponding path program 2 times [2024-06-21 22:03:34,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:03:34,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474132439] [2024-06-21 22:03:34,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:03:34,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:03:34,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:03:38,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:03:38,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:03:38,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474132439] [2024-06-21 22:03:38,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474132439] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:03:38,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:03:38,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:03:38,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753369686] [2024-06-21 22:03:38,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:03:38,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:03:38,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:03:38,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:03:38,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:03:38,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 22:03:38,304 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 384 transitions, 4099 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:38,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:03:38,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 22:03:38,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:03:40,007 INFO L124 PetriNetUnfolderBase]: 2511/4122 cut-off events. [2024-06-21 22:03:40,007 INFO L125 PetriNetUnfolderBase]: For 302376/302376 co-relation queries the response was YES. [2024-06-21 22:03:40,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26683 conditions, 4122 events. 2511/4122 cut-off events. For 302376/302376 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 24840 event pairs, 443 based on Foata normal form. 6/4128 useless extension candidates. Maximal degree in co-relation 26539. Up to 3703 conditions per place. [2024-06-21 22:03:40,058 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 380 selfloop transitions, 38 changer transitions 0/423 dead transitions. [2024-06-21 22:03:40,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 423 transitions, 5067 flow [2024-06-21 22:03:40,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:03:40,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:03:40,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-21 22:03:40,060 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42005420054200543 [2024-06-21 22:03:40,060 INFO L175 Difference]: Start difference. First operand has 314 places, 384 transitions, 4099 flow. Second operand 9 states and 155 transitions. [2024-06-21 22:03:40,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 423 transitions, 5067 flow [2024-06-21 22:03:41,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 423 transitions, 4995 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-21 22:03:41,416 INFO L231 Difference]: Finished difference. Result has 318 places, 384 transitions, 4107 flow [2024-06-21 22:03:41,416 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4027, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4107, PETRI_PLACES=318, PETRI_TRANSITIONS=384} [2024-06-21 22:03:41,416 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 276 predicate places. [2024-06-21 22:03:41,416 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 384 transitions, 4107 flow [2024-06-21 22:03:41,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:41,416 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:03:41,417 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:03:41,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-21 22:03:41,417 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:03:41,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:03:41,417 INFO L85 PathProgramCache]: Analyzing trace with hash 1611830869, now seen corresponding path program 3 times [2024-06-21 22:03:41,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:03:41,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477333273] [2024-06-21 22:03:41,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:03:41,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:03:41,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:03:44,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:03:44,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:03:44,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477333273] [2024-06-21 22:03:44,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477333273] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:03:44,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:03:44,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:03:44,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827197300] [2024-06-21 22:03:44,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:03:44,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:03:44,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:03:44,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:03:44,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:03:44,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 22:03:44,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 384 transitions, 4107 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:44,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:03:44,848 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 22:03:44,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:03:46,646 INFO L124 PetriNetUnfolderBase]: 2539/4166 cut-off events. [2024-06-21 22:03:46,646 INFO L125 PetriNetUnfolderBase]: For 319451/319451 co-relation queries the response was YES. [2024-06-21 22:03:46,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27045 conditions, 4166 events. 2539/4166 cut-off events. For 319451/319451 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 25258 event pairs, 533 based on Foata normal form. 8/4174 useless extension candidates. Maximal degree in co-relation 26899. Up to 3543 conditions per place. [2024-06-21 22:03:46,689 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 383 selfloop transitions, 44 changer transitions 0/432 dead transitions. [2024-06-21 22:03:46,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 432 transitions, 5381 flow [2024-06-21 22:03:46,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:03:46,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:03:46,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-21 22:03:46,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-21 22:03:46,691 INFO L175 Difference]: Start difference. First operand has 318 places, 384 transitions, 4107 flow. Second operand 9 states and 164 transitions. [2024-06-21 22:03:46,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 432 transitions, 5381 flow [2024-06-21 22:03:47,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 432 transitions, 5273 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-21 22:03:47,669 INFO L231 Difference]: Finished difference. Result has 318 places, 385 transitions, 4113 flow [2024-06-21 22:03:47,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3999, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4113, PETRI_PLACES=318, PETRI_TRANSITIONS=385} [2024-06-21 22:03:47,670 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 276 predicate places. [2024-06-21 22:03:47,670 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 385 transitions, 4113 flow [2024-06-21 22:03:47,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:47,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:03:47,671 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:03:47,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-21 22:03:47,671 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:03:47,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:03:47,671 INFO L85 PathProgramCache]: Analyzing trace with hash 1287080029, now seen corresponding path program 4 times [2024-06-21 22:03:47,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:03:47,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333968657] [2024-06-21 22:03:47,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:03:47,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:03:47,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:03:51,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:03:51,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:03:51,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333968657] [2024-06-21 22:03:51,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333968657] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:03:51,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:03:51,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:03:51,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313091597] [2024-06-21 22:03:51,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:03:51,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:03:51,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:03:51,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:03:51,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:03:51,402 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 22:03:51,402 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 385 transitions, 4113 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:51,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:03:51,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 22:03:51,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:03:53,085 INFO L124 PetriNetUnfolderBase]: 2521/4140 cut-off events. [2024-06-21 22:03:53,085 INFO L125 PetriNetUnfolderBase]: For 290374/290374 co-relation queries the response was YES. [2024-06-21 22:03:53,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26166 conditions, 4140 events. 2521/4140 cut-off events. For 290374/290374 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 25178 event pairs, 543 based on Foata normal form. 8/4148 useless extension candidates. Maximal degree in co-relation 26019. Up to 3755 conditions per place. [2024-06-21 22:03:53,138 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 377 selfloop transitions, 41 changer transitions 0/423 dead transitions. [2024-06-21 22:03:53,138 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 423 transitions, 5097 flow [2024-06-21 22:03:53,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:03:53,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:03:53,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-21 22:03:53,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42276422764227645 [2024-06-21 22:03:53,140 INFO L175 Difference]: Start difference. First operand has 318 places, 385 transitions, 4113 flow. Second operand 9 states and 156 transitions. [2024-06-21 22:03:53,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 423 transitions, 5097 flow [2024-06-21 22:03:54,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 423 transitions, 4989 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-21 22:03:54,557 INFO L231 Difference]: Finished difference. Result has 320 places, 385 transitions, 4092 flow [2024-06-21 22:03:54,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4005, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4092, PETRI_PLACES=320, PETRI_TRANSITIONS=385} [2024-06-21 22:03:54,558 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 278 predicate places. [2024-06-21 22:03:54,558 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 385 transitions, 4092 flow [2024-06-21 22:03:54,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:54,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:03:54,558 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:03:54,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-21 22:03:54,558 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:03:54,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:03:54,559 INFO L85 PathProgramCache]: Analyzing trace with hash -852697441, now seen corresponding path program 5 times [2024-06-21 22:03:54,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:03:54,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066796343] [2024-06-21 22:03:54,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:03:54,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:03:54,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:03:58,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:03:58,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:03:58,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066796343] [2024-06-21 22:03:58,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066796343] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:03:58,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:03:58,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:03:58,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946244116] [2024-06-21 22:03:58,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:03:58,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:03:58,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:03:58,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:03:58,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:03:58,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 22:03:58,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 385 transitions, 4092 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:58,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:03:58,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 22:03:58,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:04:00,022 INFO L124 PetriNetUnfolderBase]: 2595/4250 cut-off events. [2024-06-21 22:04:00,022 INFO L125 PetriNetUnfolderBase]: For 332709/332709 co-relation queries the response was YES. [2024-06-21 22:04:00,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27687 conditions, 4250 events. 2595/4250 cut-off events. For 332709/332709 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 25944 event pairs, 562 based on Foata normal form. 8/4257 useless extension candidates. Maximal degree in co-relation 27539. Up to 3543 conditions per place. [2024-06-21 22:04:00,067 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 331 selfloop transitions, 95 changer transitions 0/431 dead transitions. [2024-06-21 22:04:00,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 431 transitions, 5382 flow [2024-06-21 22:04:00,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:04:00,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:04:00,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-21 22:04:00,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-21 22:04:00,068 INFO L175 Difference]: Start difference. First operand has 320 places, 385 transitions, 4092 flow. Second operand 9 states and 164 transitions. [2024-06-21 22:04:00,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 431 transitions, 5382 flow [2024-06-21 22:04:01,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 431 transitions, 5264 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-06-21 22:04:01,718 INFO L231 Difference]: Finished difference. Result has 320 places, 387 transitions, 4214 flow [2024-06-21 22:04:01,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3974, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4214, PETRI_PLACES=320, PETRI_TRANSITIONS=387} [2024-06-21 22:04:01,719 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 278 predicate places. [2024-06-21 22:04:01,719 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 387 transitions, 4214 flow [2024-06-21 22:04:01,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:01,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:04:01,719 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:04:01,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-21 22:04:01,719 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:04:01,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:04:01,719 INFO L85 PathProgramCache]: Analyzing trace with hash -845078881, now seen corresponding path program 6 times [2024-06-21 22:04:01,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:04:01,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037319827] [2024-06-21 22:04:01,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:04:01,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:04:01,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:04:05,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:04:05,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:04:05,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037319827] [2024-06-21 22:04:05,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037319827] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:04:05,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:04:05,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:04:05,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836352769] [2024-06-21 22:04:05,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:04:05,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:04:05,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:04:05,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:04:05,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:04:05,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 22:04:05,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 387 transitions, 4214 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:05,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:04:05,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 22:04:05,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:04:07,075 INFO L124 PetriNetUnfolderBase]: 2623/4294 cut-off events. [2024-06-21 22:04:07,075 INFO L125 PetriNetUnfolderBase]: For 341476/341476 co-relation queries the response was YES. [2024-06-21 22:04:07,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28145 conditions, 4294 events. 2623/4294 cut-off events. For 341476/341476 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 26327 event pairs, 582 based on Foata normal form. 8/4301 useless extension candidates. Maximal degree in co-relation 27997. Up to 3773 conditions per place. [2024-06-21 22:04:07,128 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 324 selfloop transitions, 94 changer transitions 0/423 dead transitions. [2024-06-21 22:04:07,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 423 transitions, 5214 flow [2024-06-21 22:04:07,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:04:07,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:04:07,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-21 22:04:07,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42276422764227645 [2024-06-21 22:04:07,130 INFO L175 Difference]: Start difference. First operand has 320 places, 387 transitions, 4214 flow. Second operand 9 states and 156 transitions. [2024-06-21 22:04:07,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 423 transitions, 5214 flow [2024-06-21 22:04:08,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 423 transitions, 5086 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-21 22:04:08,738 INFO L231 Difference]: Finished difference. Result has 324 places, 388 transitions, 4305 flow [2024-06-21 22:04:08,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4090, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=387, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4305, PETRI_PLACES=324, PETRI_TRANSITIONS=388} [2024-06-21 22:04:08,738 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 282 predicate places. [2024-06-21 22:04:08,739 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 388 transitions, 4305 flow [2024-06-21 22:04:08,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:08,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:04:08,739 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:04:08,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-21 22:04:08,739 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:04:08,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:04:08,739 INFO L85 PathProgramCache]: Analyzing trace with hash 671032673, now seen corresponding path program 7 times [2024-06-21 22:04:08,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:04:08,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903075834] [2024-06-21 22:04:08,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:04:08,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:04:08,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:04:12,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:04:12,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:04:12,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903075834] [2024-06-21 22:04:12,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903075834] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:04:12,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:04:12,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:04:12,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897978608] [2024-06-21 22:04:12,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:04:12,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:04:12,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:04:12,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:04:12,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:04:12,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 22:04:12,679 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 388 transitions, 4305 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:12,679 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:04:12,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 22:04:12,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:04:14,640 INFO L124 PetriNetUnfolderBase]: 2651/4338 cut-off events. [2024-06-21 22:04:14,640 INFO L125 PetriNetUnfolderBase]: For 348036/348036 co-relation queries the response was YES. [2024-06-21 22:04:14,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28647 conditions, 4338 events. 2651/4338 cut-off events. For 348036/348036 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 26605 event pairs, 586 based on Foata normal form. 8/4345 useless extension candidates. Maximal degree in co-relation 28497. Up to 3817 conditions per place. [2024-06-21 22:04:14,690 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 322 selfloop transitions, 93 changer transitions 0/420 dead transitions. [2024-06-21 22:04:14,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 420 transitions, 5285 flow [2024-06-21 22:04:14,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:04:14,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:04:14,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-21 22:04:14,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41192411924119243 [2024-06-21 22:04:14,692 INFO L175 Difference]: Start difference. First operand has 324 places, 388 transitions, 4305 flow. Second operand 9 states and 152 transitions. [2024-06-21 22:04:14,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 420 transitions, 5285 flow [2024-06-21 22:04:16,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 420 transitions, 5096 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-21 22:04:16,177 INFO L231 Difference]: Finished difference. Result has 326 places, 389 transitions, 4331 flow [2024-06-21 22:04:16,177 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4116, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4331, PETRI_PLACES=326, PETRI_TRANSITIONS=389} [2024-06-21 22:04:16,178 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 284 predicate places. [2024-06-21 22:04:16,178 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 389 transitions, 4331 flow [2024-06-21 22:04:16,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:16,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:04:16,178 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:04:16,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-21 22:04:16,179 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:04:16,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:04:16,179 INFO L85 PathProgramCache]: Analyzing trace with hash 1122306905, now seen corresponding path program 8 times [2024-06-21 22:04:16,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:04:16,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686900587] [2024-06-21 22:04:16,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:04:16,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:04:16,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:04:19,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:04:19,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:04:19,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686900587] [2024-06-21 22:04:19,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686900587] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:04:19,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:04:19,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:04:19,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893887161] [2024-06-21 22:04:19,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:04:19,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:04:19,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:04:19,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:04:19,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:04:20,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 22:04:20,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 389 transitions, 4331 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:20,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:04:20,018 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 22:04:20,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:04:21,616 INFO L124 PetriNetUnfolderBase]: 2679/4386 cut-off events. [2024-06-21 22:04:21,616 INFO L125 PetriNetUnfolderBase]: For 355719/355719 co-relation queries the response was YES. [2024-06-21 22:04:21,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29060 conditions, 4386 events. 2679/4386 cut-off events. For 355719/355719 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 26950 event pairs, 583 based on Foata normal form. 8/4394 useless extension candidates. Maximal degree in co-relation 28909. Up to 4012 conditions per place. [2024-06-21 22:04:21,669 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 375 selfloop transitions, 37 changer transitions 0/417 dead transitions. [2024-06-21 22:04:21,670 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 417 transitions, 5295 flow [2024-06-21 22:04:21,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:04:21,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:04:21,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-21 22:04:21,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39295392953929537 [2024-06-21 22:04:21,671 INFO L175 Difference]: Start difference. First operand has 326 places, 389 transitions, 4331 flow. Second operand 9 states and 145 transitions. [2024-06-21 22:04:21,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 417 transitions, 5295 flow [2024-06-21 22:04:23,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 417 transitions, 5106 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-21 22:04:23,317 INFO L231 Difference]: Finished difference. Result has 328 places, 390 transitions, 4247 flow [2024-06-21 22:04:23,317 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4142, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=352, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4247, PETRI_PLACES=328, PETRI_TRANSITIONS=390} [2024-06-21 22:04:23,317 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 286 predicate places. [2024-06-21 22:04:23,318 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 390 transitions, 4247 flow [2024-06-21 22:04:23,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:23,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:04:23,318 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:04:23,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-21 22:04:23,318 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:04:23,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:04:23,319 INFO L85 PathProgramCache]: Analyzing trace with hash 914751993, now seen corresponding path program 1 times [2024-06-21 22:04:23,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:04:23,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388883261] [2024-06-21 22:04:23,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:04:23,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:04:23,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:04:27,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:04:27,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:04:27,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388883261] [2024-06-21 22:04:27,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388883261] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:04:27,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:04:27,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:04:27,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522322510] [2024-06-21 22:04:27,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:04:27,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:04:27,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:04:27,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:04:27,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:04:27,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 22:04:27,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 390 transitions, 4247 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:27,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:04:27,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 22:04:27,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:04:28,740 INFO L124 PetriNetUnfolderBase]: 2732/4469 cut-off events. [2024-06-21 22:04:28,741 INFO L125 PetriNetUnfolderBase]: For 382610/382610 co-relation queries the response was YES. [2024-06-21 22:04:28,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30141 conditions, 4469 events. 2732/4469 cut-off events. For 382610/382610 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 27477 event pairs, 572 based on Foata normal form. 6/4474 useless extension candidates. Maximal degree in co-relation 29989. Up to 3167 conditions per place. [2024-06-21 22:04:28,803 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 326 selfloop transitions, 108 changer transitions 0/439 dead transitions. [2024-06-21 22:04:28,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 439 transitions, 5763 flow [2024-06-21 22:04:28,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:04:28,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:04:28,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-21 22:04:28,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44986449864498645 [2024-06-21 22:04:28,804 INFO L175 Difference]: Start difference. First operand has 328 places, 390 transitions, 4247 flow. Second operand 9 states and 166 transitions. [2024-06-21 22:04:28,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 439 transitions, 5763 flow [2024-06-21 22:04:30,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 439 transitions, 5684 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-21 22:04:30,499 INFO L231 Difference]: Finished difference. Result has 330 places, 392 transitions, 4438 flow [2024-06-21 22:04:30,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4168, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4438, PETRI_PLACES=330, PETRI_TRANSITIONS=392} [2024-06-21 22:04:30,499 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 288 predicate places. [2024-06-21 22:04:30,499 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 392 transitions, 4438 flow [2024-06-21 22:04:30,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:30,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:04:30,500 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:04:30,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-21 22:04:30,500 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:04:30,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:04:30,500 INFO L85 PathProgramCache]: Analyzing trace with hash 582651363, now seen corresponding path program 2 times [2024-06-21 22:04:30,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:04:30,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728291864] [2024-06-21 22:04:30,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:04:30,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:04:30,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:04:33,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:04:33,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:04:33,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728291864] [2024-06-21 22:04:33,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728291864] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:04:33,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:04:33,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:04:33,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998897035] [2024-06-21 22:04:33,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:04:33,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:04:33,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:04:33,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:04:33,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:04:33,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 22:04:33,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 392 transitions, 4438 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:33,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:04:33,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 22:04:33,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:04:35,535 INFO L124 PetriNetUnfolderBase]: 2752/4505 cut-off events. [2024-06-21 22:04:35,535 INFO L125 PetriNetUnfolderBase]: For 391871/391871 co-relation queries the response was YES. [2024-06-21 22:04:35,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30810 conditions, 4505 events. 2752/4505 cut-off events. For 391871/391871 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 27756 event pairs, 565 based on Foata normal form. 6/4510 useless extension candidates. Maximal degree in co-relation 30657. Up to 3179 conditions per place. [2024-06-21 22:04:35,750 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 323 selfloop transitions, 108 changer transitions 0/436 dead transitions. [2024-06-21 22:04:35,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 436 transitions, 5742 flow [2024-06-21 22:04:35,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:04:35,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:04:35,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-21 22:04:35,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-21 22:04:35,752 INFO L175 Difference]: Start difference. First operand has 330 places, 392 transitions, 4438 flow. Second operand 9 states and 162 transitions. [2024-06-21 22:04:35,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 436 transitions, 5742 flow [2024-06-21 22:04:37,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 436 transitions, 5496 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-21 22:04:37,607 INFO L231 Difference]: Finished difference. Result has 333 places, 393 transitions, 4438 flow [2024-06-21 22:04:37,607 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4202, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4438, PETRI_PLACES=333, PETRI_TRANSITIONS=393} [2024-06-21 22:04:37,607 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 291 predicate places. [2024-06-21 22:04:37,607 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 393 transitions, 4438 flow [2024-06-21 22:04:37,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:37,608 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:04:37,608 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:04:37,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-21 22:04:37,608 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:04:37,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:04:37,609 INFO L85 PathProgramCache]: Analyzing trace with hash 582651704, now seen corresponding path program 1 times [2024-06-21 22:04:37,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:04:37,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49599597] [2024-06-21 22:04:37,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:04:37,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:04:37,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:04:41,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:04:41,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:04:41,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49599597] [2024-06-21 22:04:41,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49599597] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:04:41,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:04:41,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:04:41,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471051892] [2024-06-21 22:04:41,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:04:41,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:04:41,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:04:41,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:04:41,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:04:41,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 22:04:41,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 393 transitions, 4438 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:41,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:04:41,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 22:04:41,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:04:42,925 INFO L124 PetriNetUnfolderBase]: 2839/4612 cut-off events. [2024-06-21 22:04:42,925 INFO L125 PetriNetUnfolderBase]: For 459695/459695 co-relation queries the response was YES. [2024-06-21 22:04:42,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32477 conditions, 4612 events. 2839/4612 cut-off events. For 459695/459695 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 28317 event pairs, 602 based on Foata normal form. 8/4619 useless extension candidates. Maximal degree in co-relation 32323. Up to 3984 conditions per place. [2024-06-21 22:04:42,985 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 343 selfloop transitions, 92 changer transitions 0/440 dead transitions. [2024-06-21 22:04:42,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 440 transitions, 5710 flow [2024-06-21 22:04:42,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 22:04:42,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 22:04:42,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 186 transitions. [2024-06-21 22:04:42,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4124168514412417 [2024-06-21 22:04:42,986 INFO L175 Difference]: Start difference. First operand has 333 places, 393 transitions, 4438 flow. Second operand 11 states and 186 transitions. [2024-06-21 22:04:42,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 440 transitions, 5710 flow [2024-06-21 22:04:44,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 440 transitions, 5532 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-21 22:04:44,895 INFO L231 Difference]: Finished difference. Result has 338 places, 395 transitions, 4482 flow [2024-06-21 22:04:44,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4260, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4482, PETRI_PLACES=338, PETRI_TRANSITIONS=395} [2024-06-21 22:04:44,895 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 296 predicate places. [2024-06-21 22:04:44,895 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 395 transitions, 4482 flow [2024-06-21 22:04:44,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:44,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:04:44,896 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:04:44,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-21 22:04:44,896 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:04:44,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:04:44,896 INFO L85 PathProgramCache]: Analyzing trace with hash 671365334, now seen corresponding path program 2 times [2024-06-21 22:04:44,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:04:44,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490655410] [2024-06-21 22:04:44,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:04:44,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:04:44,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:04:48,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:04:48,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:04:48,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490655410] [2024-06-21 22:04:48,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490655410] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:04:48,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:04:48,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:04:48,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59179838] [2024-06-21 22:04:48,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:04:48,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:04:48,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:04:48,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:04:48,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:04:48,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 22:04:48,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 395 transitions, 4482 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:48,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:04:48,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 22:04:48,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:04:50,401 INFO L124 PetriNetUnfolderBase]: 2875/4678 cut-off events. [2024-06-21 22:04:50,401 INFO L125 PetriNetUnfolderBase]: For 479092/479092 co-relation queries the response was YES. [2024-06-21 22:04:50,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32884 conditions, 4678 events. 2875/4678 cut-off events. For 479092/479092 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 28929 event pairs, 632 based on Foata normal form. 10/4687 useless extension candidates. Maximal degree in co-relation 32729. Up to 4209 conditions per place. [2024-06-21 22:04:50,451 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 342 selfloop transitions, 85 changer transitions 0/432 dead transitions. [2024-06-21 22:04:50,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 432 transitions, 5486 flow [2024-06-21 22:04:50,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 22:04:50,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 22:04:50,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 178 transitions. [2024-06-21 22:04:50,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3946784922394678 [2024-06-21 22:04:50,453 INFO L175 Difference]: Start difference. First operand has 338 places, 395 transitions, 4482 flow. Second operand 11 states and 178 transitions. [2024-06-21 22:04:50,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 432 transitions, 5486 flow [2024-06-21 22:04:53,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 432 transitions, 5369 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-21 22:04:53,060 INFO L231 Difference]: Finished difference. Result has 342 places, 396 transitions, 4560 flow [2024-06-21 22:04:53,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4365, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4560, PETRI_PLACES=342, PETRI_TRANSITIONS=396} [2024-06-21 22:04:53,061 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 300 predicate places. [2024-06-21 22:04:53,061 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 396 transitions, 4560 flow [2024-06-21 22:04:53,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:53,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:04:53,061 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:04:53,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-21 22:04:53,061 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:04:53,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:04:53,061 INFO L85 PathProgramCache]: Analyzing trace with hash -1034735369, now seen corresponding path program 3 times [2024-06-21 22:04:53,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:04:53,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533041913] [2024-06-21 22:04:53,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:04:53,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:04:53,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:04:56,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:04:56,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:04:56,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533041913] [2024-06-21 22:04:56,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533041913] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:04:56,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:04:56,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:04:56,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238864696] [2024-06-21 22:04:56,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:04:56,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:04:56,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:04:56,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:04:56,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:04:56,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 22:04:56,406 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 396 transitions, 4560 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:56,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:04:56,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 22:04:56,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:04:58,324 INFO L124 PetriNetUnfolderBase]: 2895/4734 cut-off events. [2024-06-21 22:04:58,324 INFO L125 PetriNetUnfolderBase]: For 466510/466510 co-relation queries the response was YES. [2024-06-21 22:04:58,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33348 conditions, 4734 events. 2895/4734 cut-off events. For 466510/466510 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 29491 event pairs, 658 based on Foata normal form. 6/4739 useless extension candidates. Maximal degree in co-relation 33191. Up to 4103 conditions per place. [2024-06-21 22:04:58,386 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 329 selfloop transitions, 97 changer transitions 0/431 dead transitions. [2024-06-21 22:04:58,386 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 431 transitions, 5581 flow [2024-06-21 22:04:58,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:04:58,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:04:58,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-21 22:04:58,387 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4173441734417344 [2024-06-21 22:04:58,387 INFO L175 Difference]: Start difference. First operand has 342 places, 396 transitions, 4560 flow. Second operand 9 states and 154 transitions. [2024-06-21 22:04:58,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 431 transitions, 5581 flow [2024-06-21 22:05:00,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 431 transitions, 5406 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-21 22:05:00,770 INFO L231 Difference]: Finished difference. Result has 342 places, 397 transitions, 4602 flow [2024-06-21 22:05:00,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4385, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4602, PETRI_PLACES=342, PETRI_TRANSITIONS=397} [2024-06-21 22:05:00,771 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 300 predicate places. [2024-06-21 22:05:00,771 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 397 transitions, 4602 flow [2024-06-21 22:05:00,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:05:00,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:05:00,771 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:05:00,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-21 22:05:00,771 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:05:00,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:05:00,771 INFO L85 PathProgramCache]: Analyzing trace with hash 671217464, now seen corresponding path program 3 times [2024-06-21 22:05:00,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:05:00,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083339957] [2024-06-21 22:05:00,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:05:00,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:05:00,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:05:04,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:05:04,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:05:04,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083339957] [2024-06-21 22:05:04,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083339957] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:05:04,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:05:04,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:05:04,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513940222] [2024-06-21 22:05:04,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:05:04,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:05:04,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:05:04,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:05:04,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:05:04,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 22:05:04,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 397 transitions, 4602 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:05:04,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:05:04,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 22:05:04,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:05:06,427 INFO L124 PetriNetUnfolderBase]: 2923/4756 cut-off events. [2024-06-21 22:05:06,427 INFO L125 PetriNetUnfolderBase]: For 487259/487259 co-relation queries the response was YES. [2024-06-21 22:05:06,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33647 conditions, 4756 events. 2923/4756 cut-off events. For 487259/487259 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 29471 event pairs, 634 based on Foata normal form. 8/4763 useless extension candidates. Maximal degree in co-relation 33489. Up to 4247 conditions per place. [2024-06-21 22:05:06,484 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 346 selfloop transitions, 88 changer transitions 0/439 dead transitions. [2024-06-21 22:05:06,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 439 transitions, 5646 flow [2024-06-21 22:05:06,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 22:05:06,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 22:05:06,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 193 transitions. [2024-06-21 22:05:06,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39227642276422764 [2024-06-21 22:05:06,485 INFO L175 Difference]: Start difference. First operand has 342 places, 397 transitions, 4602 flow. Second operand 12 states and 193 transitions. [2024-06-21 22:05:06,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 439 transitions, 5646 flow [2024-06-21 22:05:08,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 439 transitions, 5450 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-21 22:05:08,950 INFO L231 Difference]: Finished difference. Result has 347 places, 398 transitions, 4608 flow [2024-06-21 22:05:08,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4406, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4608, PETRI_PLACES=347, PETRI_TRANSITIONS=398} [2024-06-21 22:05:08,950 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 305 predicate places. [2024-06-21 22:05:08,950 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 398 transitions, 4608 flow [2024-06-21 22:05:08,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:05:08,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:05:08,950 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:05:08,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-21 22:05:08,951 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:05:08,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:05:08,951 INFO L85 PathProgramCache]: Analyzing trace with hash 91524468, now seen corresponding path program 4 times [2024-06-21 22:05:08,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:05:08,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296349599] [2024-06-21 22:05:08,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:05:08,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:05:08,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:05:12,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:05:12,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:05:12,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296349599] [2024-06-21 22:05:12,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296349599] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:05:12,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:05:12,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:05:12,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11073638] [2024-06-21 22:05:12,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:05:12,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:05:12,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:05:12,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:05:12,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:05:12,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 22:05:12,519 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 398 transitions, 4608 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:05:12,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:05:12,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 22:05:12,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:05:14,586 INFO L124 PetriNetUnfolderBase]: 3063/4998 cut-off events. [2024-06-21 22:05:14,586 INFO L125 PetriNetUnfolderBase]: For 695256/695256 co-relation queries the response was YES. [2024-06-21 22:05:14,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35024 conditions, 4998 events. 3063/4998 cut-off events. For 695256/695256 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 31298 event pairs, 687 based on Foata normal form. 44/5042 useless extension candidates. Maximal degree in co-relation 34865. Up to 4335 conditions per place. [2024-06-21 22:05:14,654 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 361 selfloop transitions, 59 changer transitions 11/436 dead transitions. [2024-06-21 22:05:14,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 436 transitions, 5642 flow [2024-06-21 22:05:14,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 22:05:14,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 22:05:14,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 192 transitions. [2024-06-21 22:05:14,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-21 22:05:14,656 INFO L175 Difference]: Start difference. First operand has 347 places, 398 transitions, 4608 flow. Second operand 12 states and 192 transitions. [2024-06-21 22:05:14,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 436 transitions, 5642 flow [2024-06-21 22:05:17,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 436 transitions, 5454 flow, removed 7 selfloop flow, removed 10 redundant places. [2024-06-21 22:05:17,695 INFO L231 Difference]: Finished difference. Result has 349 places, 390 transitions, 4470 flow [2024-06-21 22:05:17,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4420, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4470, PETRI_PLACES=349, PETRI_TRANSITIONS=390} [2024-06-21 22:05:17,695 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 307 predicate places. [2024-06-21 22:05:17,695 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 390 transitions, 4470 flow [2024-06-21 22:05:17,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:05:17,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:05:17,696 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:05:17,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-21 22:05:17,696 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:05:17,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:05:17,696 INFO L85 PathProgramCache]: Analyzing trace with hash 790270166, now seen corresponding path program 5 times [2024-06-21 22:05:17,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:05:17,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251469073] [2024-06-21 22:05:17,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:05:17,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:05:17,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:05:21,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:05:21,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:05:21,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251469073] [2024-06-21 22:05:21,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251469073] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:05:21,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:05:21,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 22:05:21,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340396816] [2024-06-21 22:05:21,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:05:21,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 22:05:21,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:05:21,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 22:05:21,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 22:05:21,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 22:05:21,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 390 transitions, 4470 flow. Second operand has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:05:21,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:05:21,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 22:05:21,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:05:23,794 INFO L124 PetriNetUnfolderBase]: 3067/5006 cut-off events. [2024-06-21 22:05:23,794 INFO L125 PetriNetUnfolderBase]: For 709214/709214 co-relation queries the response was YES. [2024-06-21 22:05:23,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35075 conditions, 5006 events. 3067/5006 cut-off events. For 709214/709214 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 31339 event pairs, 695 based on Foata normal form. 44/5050 useless extension candidates. Maximal degree in co-relation 34915. Up to 4381 conditions per place. [2024-06-21 22:05:23,861 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 361 selfloop transitions, 55 changer transitions 6/427 dead transitions. [2024-06-21 22:05:23,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 427 transitions, 5486 flow [2024-06-21 22:05:23,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 22:05:23,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 22:05:23,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 180 transitions. [2024-06-21 22:05:23,862 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3991130820399113 [2024-06-21 22:05:23,862 INFO L175 Difference]: Start difference. First operand has 349 places, 390 transitions, 4470 flow. Second operand 11 states and 180 transitions. [2024-06-21 22:05:23,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 427 transitions, 5486 flow [2024-06-21 22:05:26,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 427 transitions, 5347 flow, removed 10 selfloop flow, removed 11 redundant places. [2024-06-21 22:05:26,108 INFO L231 Difference]: Finished difference. Result has 349 places, 387 transitions, 4432 flow [2024-06-21 22:05:26,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4331, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4432, PETRI_PLACES=349, PETRI_TRANSITIONS=387} [2024-06-21 22:05:26,109 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 307 predicate places. [2024-06-21 22:05:26,109 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 387 transitions, 4432 flow [2024-06-21 22:05:26,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:05:26,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:05:26,109 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:05:26,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-21 22:05:26,110 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:05:26,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:05:26,110 INFO L85 PathProgramCache]: Analyzing trace with hash 1122491696, now seen corresponding path program 6 times [2024-06-21 22:05:26,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:05:26,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656570017] [2024-06-21 22:05:26,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:05:26,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:05:26,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:05:29,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:05:29,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:05:29,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656570017] [2024-06-21 22:05:29,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656570017] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:05:29,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:05:29,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:05:29,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741970080] [2024-06-21 22:05:29,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:05:29,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:05:29,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:05:29,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:05:29,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:05:29,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 22:05:29,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 387 transitions, 4432 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:05:29,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:05:29,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 22:05:29,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:05:31,665 INFO L124 PetriNetUnfolderBase]: 3075/5020 cut-off events. [2024-06-21 22:05:31,665 INFO L125 PetriNetUnfolderBase]: For 686590/686590 co-relation queries the response was YES. [2024-06-21 22:05:31,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35089 conditions, 5020 events. 3075/5020 cut-off events. For 686590/686590 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 31407 event pairs, 651 based on Foata normal form. 40/5060 useless extension candidates. Maximal degree in co-relation 34929. Up to 4297 conditions per place. [2024-06-21 22:05:31,725 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 361 selfloop transitions, 54 changer transitions 10/430 dead transitions. [2024-06-21 22:05:31,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 430 transitions, 5524 flow [2024-06-21 22:05:31,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 22:05:31,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 22:05:31,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 184 transitions. [2024-06-21 22:05:31,727 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4079822616407982 [2024-06-21 22:05:31,727 INFO L175 Difference]: Start difference. First operand has 349 places, 387 transitions, 4432 flow. Second operand 11 states and 184 transitions. [2024-06-21 22:05:31,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 430 transitions, 5524 flow [2024-06-21 22:05:34,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 430 transitions, 5403 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-21 22:05:34,018 INFO L231 Difference]: Finished difference. Result has 351 places, 383 transitions, 4376 flow [2024-06-21 22:05:34,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4311, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=387, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4376, PETRI_PLACES=351, PETRI_TRANSITIONS=383} [2024-06-21 22:05:34,019 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 309 predicate places. [2024-06-21 22:05:34,019 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 383 transitions, 4376 flow [2024-06-21 22:05:34,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:05:34,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:05:34,019 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:05:34,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-21 22:05:34,020 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:05:34,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:05:34,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1122491355, now seen corresponding path program 4 times [2024-06-21 22:05:34,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:05:34,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202229662] [2024-06-21 22:05:34,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:05:34,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:05:34,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:05:37,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:05:37,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:05:37,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202229662] [2024-06-21 22:05:37,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202229662] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:05:37,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:05:37,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:05:37,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747166147] [2024-06-21 22:05:37,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:05:37,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:05:37,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:05:37,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:05:37,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:05:37,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 22:05:37,856 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 383 transitions, 4376 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:05:37,856 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:05:37,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 22:05:37,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:05:39,646 INFO L124 PetriNetUnfolderBase]: 2964/4855 cut-off events. [2024-06-21 22:05:39,647 INFO L125 PetriNetUnfolderBase]: For 503202/503202 co-relation queries the response was YES. [2024-06-21 22:05:39,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34204 conditions, 4855 events. 2964/4855 cut-off events. For 503202/503202 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 30365 event pairs, 681 based on Foata normal form. 6/4861 useless extension candidates. Maximal degree in co-relation 34043. Up to 4446 conditions per place. [2024-06-21 22:05:39,863 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 375 selfloop transitions, 34 changer transitions 0/414 dead transitions. [2024-06-21 22:05:39,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 414 transitions, 5353 flow [2024-06-21 22:05:39,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:05:39,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:05:39,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-21 22:05:39,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3983739837398374 [2024-06-21 22:05:39,865 INFO L175 Difference]: Start difference. First operand has 351 places, 383 transitions, 4376 flow. Second operand 9 states and 147 transitions. [2024-06-21 22:05:39,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 414 transitions, 5353 flow [2024-06-21 22:05:42,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 414 transitions, 5207 flow, removed 20 selfloop flow, removed 9 redundant places. [2024-06-21 22:05:42,114 INFO L231 Difference]: Finished difference. Result has 351 places, 384 transitions, 4323 flow [2024-06-21 22:05:42,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4230, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4323, PETRI_PLACES=351, PETRI_TRANSITIONS=384} [2024-06-21 22:05:42,115 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 309 predicate places. [2024-06-21 22:05:42,115 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 384 transitions, 4323 flow [2024-06-21 22:05:42,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:05:42,115 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:05:42,115 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:05:42,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-21 22:05:42,116 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:05:42,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:05:42,117 INFO L85 PathProgramCache]: Analyzing trace with hash 1329565868, now seen corresponding path program 1 times [2024-06-21 22:05:42,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:05:42,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925752245] [2024-06-21 22:05:42,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:05:42,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:05:42,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:05:46,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:05:46,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:05:46,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925752245] [2024-06-21 22:05:46,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925752245] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:05:46,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:05:46,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 22:05:46,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867067640] [2024-06-21 22:05:46,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:05:46,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 22:05:46,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:05:46,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 22:05:46,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 22:05:46,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 22:05:46,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 384 transitions, 4323 flow. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:05:46,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:05:46,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 22:05:46,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:05:48,279 INFO L124 PetriNetUnfolderBase]: 3072/5041 cut-off events. [2024-06-21 22:05:48,279 INFO L125 PetriNetUnfolderBase]: For 681698/681698 co-relation queries the response was YES. [2024-06-21 22:05:48,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34963 conditions, 5041 events. 3072/5041 cut-off events. For 681698/681698 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 31690 event pairs, 655 based on Foata normal form. 36/5077 useless extension candidates. Maximal degree in co-relation 34801. Up to 4239 conditions per place. [2024-06-21 22:05:48,345 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 361 selfloop transitions, 47 changer transitions 17/430 dead transitions. [2024-06-21 22:05:48,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 430 transitions, 5443 flow [2024-06-21 22:05:48,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 22:05:48,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 22:05:48,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 194 transitions. [2024-06-21 22:05:48,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3943089430894309 [2024-06-21 22:05:48,346 INFO L175 Difference]: Start difference. First operand has 351 places, 384 transitions, 4323 flow. Second operand 12 states and 194 transitions. [2024-06-21 22:05:48,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 430 transitions, 5443 flow [2024-06-21 22:05:51,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 430 transitions, 5371 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-21 22:05:51,156 INFO L231 Difference]: Finished difference. Result has 357 places, 376 transitions, 4220 flow [2024-06-21 22:05:51,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4251, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4220, PETRI_PLACES=357, PETRI_TRANSITIONS=376} [2024-06-21 22:05:51,156 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 315 predicate places. [2024-06-21 22:05:51,157 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 376 transitions, 4220 flow [2024-06-21 22:05:51,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:05:51,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:05:51,157 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:05:51,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-21 22:05:51,157 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:05:51,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:05:51,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1630761985, now seen corresponding path program 9 times [2024-06-21 22:05:51,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:05:51,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877259663] [2024-06-21 22:05:51,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:05:51,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:05:51,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:05:54,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:05:54,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:05:54,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877259663] [2024-06-21 22:05:54,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877259663] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:05:54,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:05:54,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:05:54,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813434506] [2024-06-21 22:05:54,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:05:54,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:05:54,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:05:54,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:05:54,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:05:54,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 22:05:54,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 376 transitions, 4220 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:05:54,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:05:54,491 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 22:05:54,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:05:56,458 INFO L124 PetriNetUnfolderBase]: 2947/4824 cut-off events. [2024-06-21 22:05:56,458 INFO L125 PetriNetUnfolderBase]: For 568513/568513 co-relation queries the response was YES. [2024-06-21 22:05:56,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34809 conditions, 4824 events. 2947/4824 cut-off events. For 568513/568513 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 30096 event pairs, 705 based on Foata normal form. 8/4831 useless extension candidates. Maximal degree in co-relation 34645. Up to 4116 conditions per place. [2024-06-21 22:05:56,520 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 326 selfloop transitions, 87 changer transitions 0/418 dead transitions. [2024-06-21 22:05:56,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 418 transitions, 5506 flow [2024-06-21 22:05:56,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:05:56,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:05:56,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-21 22:05:56,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43360433604336046 [2024-06-21 22:05:56,522 INFO L175 Difference]: Start difference. First operand has 357 places, 376 transitions, 4220 flow. Second operand 9 states and 160 transitions. [2024-06-21 22:05:56,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 418 transitions, 5506 flow [2024-06-21 22:05:59,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 418 transitions, 5422 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-21 22:05:59,290 INFO L231 Difference]: Finished difference. Result has 356 places, 378 transitions, 4364 flow [2024-06-21 22:05:59,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4136, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4364, PETRI_PLACES=356, PETRI_TRANSITIONS=378} [2024-06-21 22:05:59,291 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 314 predicate places. [2024-06-21 22:05:59,291 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 378 transitions, 4364 flow [2024-06-21 22:05:59,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:05:59,291 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:05:59,291 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:05:59,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-21 22:05:59,291 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:05:59,292 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:05:59,292 INFO L85 PathProgramCache]: Analyzing trace with hash 825253965, now seen corresponding path program 10 times [2024-06-21 22:05:59,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:05:59,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900115480] [2024-06-21 22:05:59,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:05:59,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:05:59,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:06:02,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:06:02,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:06:02,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900115480] [2024-06-21 22:06:02,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900115480] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:06:02,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:06:02,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:06:02,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260555612] [2024-06-21 22:06:02,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:06:02,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:06:02,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:06:02,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:06:02,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:06:02,822 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 22:06:02,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 378 transitions, 4364 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:06:02,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:06:02,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 22:06:02,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:06:05,060 INFO L124 PetriNetUnfolderBase]: 2975/4868 cut-off events. [2024-06-21 22:06:05,060 INFO L125 PetriNetUnfolderBase]: For 579983/579983 co-relation queries the response was YES. [2024-06-21 22:06:05,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35425 conditions, 4868 events. 2975/4868 cut-off events. For 579983/579983 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 30475 event pairs, 725 based on Foata normal form. 8/4875 useless extension candidates. Maximal degree in co-relation 35259. Up to 4346 conditions per place. [2024-06-21 22:06:05,116 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 319 selfloop transitions, 86 changer transitions 0/410 dead transitions. [2024-06-21 22:06:05,116 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 410 transitions, 5330 flow [2024-06-21 22:06:05,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:06:05,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:06:05,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-21 22:06:05,118 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41192411924119243 [2024-06-21 22:06:05,118 INFO L175 Difference]: Start difference. First operand has 356 places, 378 transitions, 4364 flow. Second operand 9 states and 152 transitions. [2024-06-21 22:06:05,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 410 transitions, 5330 flow [2024-06-21 22:06:07,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 410 transitions, 5207 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-21 22:06:07,629 INFO L231 Difference]: Finished difference. Result has 360 places, 379 transitions, 4446 flow [2024-06-21 22:06:07,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4247, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4446, PETRI_PLACES=360, PETRI_TRANSITIONS=379} [2024-06-21 22:06:07,629 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 318 predicate places. [2024-06-21 22:06:07,629 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 379 transitions, 4446 flow [2024-06-21 22:06:07,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:06:07,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:06:07,630 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:06:07,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-21 22:06:07,630 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:06:07,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:06:07,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1364855455, now seen corresponding path program 11 times [2024-06-21 22:06:07,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:06:07,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4654459] [2024-06-21 22:06:07,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:06:07,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:06:07,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:06:11,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:06:11,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:06:11,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4654459] [2024-06-21 22:06:11,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4654459] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:06:11,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:06:11,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:06:11,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110564854] [2024-06-21 22:06:11,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:06:11,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:06:11,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:06:11,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:06:11,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:06:11,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 22:06:11,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 379 transitions, 4446 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:06:11,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:06:11,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 22:06:11,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:06:13,432 INFO L124 PetriNetUnfolderBase]: 3003/4912 cut-off events. [2024-06-21 22:06:13,432 INFO L125 PetriNetUnfolderBase]: For 589614/589614 co-relation queries the response was YES. [2024-06-21 22:06:13,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35883 conditions, 4912 events. 3003/4912 cut-off events. For 589614/589614 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 30837 event pairs, 729 based on Foata normal form. 8/4919 useless extension candidates. Maximal degree in co-relation 35715. Up to 4390 conditions per place. [2024-06-21 22:06:13,497 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 319 selfloop transitions, 84 changer transitions 0/408 dead transitions. [2024-06-21 22:06:13,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 408 transitions, 5396 flow [2024-06-21 22:06:13,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:06:13,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:06:13,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-21 22:06:13,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4037940379403794 [2024-06-21 22:06:13,498 INFO L175 Difference]: Start difference. First operand has 360 places, 379 transitions, 4446 flow. Second operand 9 states and 149 transitions. [2024-06-21 22:06:13,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 408 transitions, 5396 flow [2024-06-21 22:06:16,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 408 transitions, 5223 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-21 22:06:16,404 INFO L231 Difference]: Finished difference. Result has 362 places, 380 transitions, 4470 flow [2024-06-21 22:06:16,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4273, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4470, PETRI_PLACES=362, PETRI_TRANSITIONS=380} [2024-06-21 22:06:16,404 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 320 predicate places. [2024-06-21 22:06:16,404 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 380 transitions, 4470 flow [2024-06-21 22:06:16,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:06:16,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:06:16,405 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:06:16,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-21 22:06:16,405 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:06:16,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:06:16,405 INFO L85 PathProgramCache]: Analyzing trace with hash 1473715553, now seen corresponding path program 12 times [2024-06-21 22:06:16,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:06:16,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786893174] [2024-06-21 22:06:16,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:06:16,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:06:16,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:06:19,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:06:19,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:06:19,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786893174] [2024-06-21 22:06:19,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786893174] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:06:19,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:06:19,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:06:19,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318784640] [2024-06-21 22:06:19,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:06:19,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:06:19,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:06:19,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:06:19,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:06:19,609 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 22:06:19,609 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 380 transitions, 4470 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:06:19,609 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:06:19,609 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 22:06:19,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:06:21,650 INFO L124 PetriNetUnfolderBase]: 3031/4956 cut-off events. [2024-06-21 22:06:21,650 INFO L125 PetriNetUnfolderBase]: For 600788/600788 co-relation queries the response was YES. [2024-06-21 22:06:21,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36316 conditions, 4956 events. 3031/4956 cut-off events. For 600788/600788 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 31183 event pairs, 733 based on Foata normal form. 8/4963 useless extension candidates. Maximal degree in co-relation 36147. Up to 4434 conditions per place. [2024-06-21 22:06:21,713 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 311 selfloop transitions, 88 changer transitions 0/404 dead transitions. [2024-06-21 22:06:21,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 404 transitions, 5396 flow [2024-06-21 22:06:21,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:06:21,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:06:21,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-21 22:06:21,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-21 22:06:21,714 INFO L175 Difference]: Start difference. First operand has 362 places, 380 transitions, 4470 flow. Second operand 9 states and 144 transitions. [2024-06-21 22:06:21,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 404 transitions, 5396 flow [2024-06-21 22:06:24,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 404 transitions, 5225 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-21 22:06:24,194 INFO L231 Difference]: Finished difference. Result has 364 places, 381 transitions, 4506 flow [2024-06-21 22:06:24,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4299, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4506, PETRI_PLACES=364, PETRI_TRANSITIONS=381} [2024-06-21 22:06:24,195 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 322 predicate places. [2024-06-21 22:06:24,195 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 381 transitions, 4506 flow [2024-06-21 22:06:24,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:06:24,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:06:24,195 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:06:24,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-21 22:06:24,195 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:06:24,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:06:24,195 INFO L85 PathProgramCache]: Analyzing trace with hash -816931009, now seen corresponding path program 13 times [2024-06-21 22:06:24,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:06:24,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521546341] [2024-06-21 22:06:24,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:06:24,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:06:24,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:06:27,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:06:27,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:06:27,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521546341] [2024-06-21 22:06:27,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521546341] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:06:27,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:06:27,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:06:27,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920371071] [2024-06-21 22:06:27,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:06:27,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:06:27,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:06:27,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:06:27,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:06:27,583 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 22:06:27,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 381 transitions, 4506 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:06:27,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:06:27,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 22:06:27,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:06:30,025 INFO L124 PetriNetUnfolderBase]: 3013/4934 cut-off events. [2024-06-21 22:06:30,025 INFO L125 PetriNetUnfolderBase]: For 560150/560150 co-relation queries the response was YES. [2024-06-21 22:06:30,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35309 conditions, 4934 events. 3013/4934 cut-off events. For 560150/560150 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 30990 event pairs, 692 based on Foata normal form. 8/4942 useless extension candidates. Maximal degree in co-relation 35139. Up to 4300 conditions per place. [2024-06-21 22:06:30,089 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 354 selfloop transitions, 71 changer transitions 0/430 dead transitions. [2024-06-21 22:06:30,089 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 430 transitions, 5540 flow [2024-06-21 22:06:30,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 22:06:30,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 22:06:30,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 182 transitions. [2024-06-21 22:06:30,091 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44390243902439025 [2024-06-21 22:06:30,091 INFO L175 Difference]: Start difference. First operand has 364 places, 381 transitions, 4506 flow. Second operand 10 states and 182 transitions. [2024-06-21 22:06:30,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 430 transitions, 5540 flow [2024-06-21 22:06:32,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 430 transitions, 5355 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-21 22:06:32,577 INFO L231 Difference]: Finished difference. Result has 367 places, 381 transitions, 4474 flow [2024-06-21 22:06:32,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4321, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4474, PETRI_PLACES=367, PETRI_TRANSITIONS=381} [2024-06-21 22:06:32,578 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 325 predicate places. [2024-06-21 22:06:32,578 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 381 transitions, 4474 flow [2024-06-21 22:06:32,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:06:32,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:06:32,578 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:06:32,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-21 22:06:32,578 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:06:32,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:06:32,578 INFO L85 PathProgramCache]: Analyzing trace with hash 1902735167, now seen corresponding path program 14 times [2024-06-21 22:06:32,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:06:32,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401174243] [2024-06-21 22:06:32,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:06:32,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:06:32,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:06:35,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:06:35,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:06:35,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401174243] [2024-06-21 22:06:35,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401174243] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:06:35,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:06:35,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:06:35,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695280245] [2024-06-21 22:06:35,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:06:35,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:06:35,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:06:35,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:06:35,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:06:36,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 22:06:36,000 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 381 transitions, 4474 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:06:36,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:06:36,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 22:06:36,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:06:37,600 INFO L124 PetriNetUnfolderBase]: 2995/4904 cut-off events. [2024-06-21 22:06:37,600 INFO L125 PetriNetUnfolderBase]: For 517805/517805 co-relation queries the response was YES. [2024-06-21 22:06:37,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34250 conditions, 4904 events. 2995/4904 cut-off events. For 517805/517805 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 30834 event pairs, 705 based on Foata normal form. 8/4911 useless extension candidates. Maximal degree in co-relation 34079. Up to 4306 conditions per place. [2024-06-21 22:06:37,667 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 344 selfloop transitions, 66 changer transitions 0/415 dead transitions. [2024-06-21 22:06:37,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 415 transitions, 5434 flow [2024-06-21 22:06:37,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:06:37,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:06:37,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-21 22:06:37,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4420731707317073 [2024-06-21 22:06:37,668 INFO L175 Difference]: Start difference. First operand has 367 places, 381 transitions, 4474 flow. Second operand 8 states and 145 transitions. [2024-06-21 22:06:37,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 415 transitions, 5434 flow [2024-06-21 22:06:40,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 415 transitions, 5271 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-06-21 22:06:40,567 INFO L231 Difference]: Finished difference. Result has 365 places, 381 transitions, 4451 flow [2024-06-21 22:06:40,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4311, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4451, PETRI_PLACES=365, PETRI_TRANSITIONS=381} [2024-06-21 22:06:40,567 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 323 predicate places. [2024-06-21 22:06:40,567 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 381 transitions, 4451 flow [2024-06-21 22:06:40,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:06:40,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:06:40,568 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:06:40,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-21 22:06:40,568 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:06:40,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:06:40,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1453505535, now seen corresponding path program 5 times [2024-06-21 22:06:40,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:06:40,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932463274] [2024-06-21 22:06:40,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:06:40,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:06:40,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:06:43,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:06:43,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:06:43,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932463274] [2024-06-21 22:06:43,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932463274] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:06:43,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:06:43,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:06:43,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954619789] [2024-06-21 22:06:43,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:06:43,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:06:43,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:06:43,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:06:43,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:06:43,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 22:06:43,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 381 transitions, 4451 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:06:43,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:06:43,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 22:06:43,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:06:45,741 INFO L124 PetriNetUnfolderBase]: 3048/4991 cut-off events. [2024-06-21 22:06:45,742 INFO L125 PetriNetUnfolderBase]: For 534511/534511 co-relation queries the response was YES. [2024-06-21 22:06:45,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35390 conditions, 4991 events. 3048/4991 cut-off events. For 534511/534511 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 31443 event pairs, 701 based on Foata normal form. 6/4996 useless extension candidates. Maximal degree in co-relation 35219. Up to 3996 conditions per place. [2024-06-21 22:06:45,807 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 325 selfloop transitions, 96 changer transitions 0/426 dead transitions. [2024-06-21 22:06:45,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 426 transitions, 5767 flow [2024-06-21 22:06:45,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:06:45,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:06:45,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-21 22:06:45,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-21 22:06:45,808 INFO L175 Difference]: Start difference. First operand has 365 places, 381 transitions, 4451 flow. Second operand 9 states and 162 transitions. [2024-06-21 22:06:45,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 426 transitions, 5767 flow [2024-06-21 22:06:48,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 426 transitions, 5613 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-21 22:06:48,692 INFO L231 Difference]: Finished difference. Result has 366 places, 383 transitions, 4549 flow [2024-06-21 22:06:48,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4299, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4549, PETRI_PLACES=366, PETRI_TRANSITIONS=383} [2024-06-21 22:06:48,693 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 324 predicate places. [2024-06-21 22:06:48,693 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 383 transitions, 4549 flow [2024-06-21 22:06:48,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:06:48,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:06:48,693 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:06:48,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-21 22:06:48,694 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:06:48,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:06:48,694 INFO L85 PathProgramCache]: Analyzing trace with hash -919601334, now seen corresponding path program 7 times [2024-06-21 22:06:48,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:06:48,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384023785] [2024-06-21 22:06:48,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:06:48,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:06:48,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:06:51,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:06:51,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:06:51,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384023785] [2024-06-21 22:06:51,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384023785] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:06:51,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:06:51,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:06:51,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79062697] [2024-06-21 22:06:51,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:06:51,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:06:51,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:06:51,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:06:51,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:06:51,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 22:06:51,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 383 transitions, 4549 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:06:51,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:06:51,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 22:06:51,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:06:53,838 INFO L124 PetriNetUnfolderBase]: 3135/5116 cut-off events. [2024-06-21 22:06:53,839 INFO L125 PetriNetUnfolderBase]: For 614255/614261 co-relation queries the response was YES. [2024-06-21 22:06:53,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37446 conditions, 5116 events. 3135/5116 cut-off events. For 614255/614261 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 32327 event pairs, 735 based on Foata normal form. 14/5130 useless extension candidates. Maximal degree in co-relation 37275. Up to 4552 conditions per place. [2024-06-21 22:06:53,902 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 351 selfloop transitions, 69 changer transitions 0/425 dead transitions. [2024-06-21 22:06:53,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 425 transitions, 5813 flow [2024-06-21 22:06:53,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 22:06:53,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 22:06:53,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 168 transitions. [2024-06-21 22:06:53,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4097560975609756 [2024-06-21 22:06:53,904 INFO L175 Difference]: Start difference. First operand has 366 places, 383 transitions, 4549 flow. Second operand 10 states and 168 transitions. [2024-06-21 22:06:53,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 425 transitions, 5813 flow [2024-06-21 22:06:56,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 425 transitions, 5601 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-21 22:06:56,165 INFO L231 Difference]: Finished difference. Result has 370 places, 385 transitions, 4521 flow [2024-06-21 22:06:56,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4337, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4521, PETRI_PLACES=370, PETRI_TRANSITIONS=385} [2024-06-21 22:06:56,166 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 328 predicate places. [2024-06-21 22:06:56,166 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 385 transitions, 4521 flow [2024-06-21 22:06:56,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:06:56,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:06:56,166 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:06:56,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-21 22:06:56,166 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:06:56,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:06:56,166 INFO L85 PathProgramCache]: Analyzing trace with hash -1821755335, now seen corresponding path program 6 times [2024-06-21 22:06:56,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:06:56,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134743615] [2024-06-21 22:06:56,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:06:56,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:06:56,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:06:59,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:06:59,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:06:59,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134743615] [2024-06-21 22:06:59,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134743615] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:06:59,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:06:59,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:06:59,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991652813] [2024-06-21 22:06:59,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:06:59,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:06:59,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:06:59,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:06:59,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:06:59,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 22:06:59,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 385 transitions, 4521 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:06:59,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:06:59,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 22:06:59,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:07:01,432 INFO L124 PetriNetUnfolderBase]: 3155/5160 cut-off events. [2024-06-21 22:07:01,432 INFO L125 PetriNetUnfolderBase]: For 609073/609073 co-relation queries the response was YES. [2024-06-21 22:07:01,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37515 conditions, 5160 events. 3155/5160 cut-off events. For 609073/609073 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 32667 event pairs, 737 based on Foata normal form. 6/5165 useless extension candidates. Maximal degree in co-relation 37343. Up to 4141 conditions per place. [2024-06-21 22:07:01,496 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 326 selfloop transitions, 95 changer transitions 0/426 dead transitions. [2024-06-21 22:07:01,496 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 426 transitions, 5817 flow [2024-06-21 22:07:01,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:07:01,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:07:01,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-21 22:07:01,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43089430894308944 [2024-06-21 22:07:01,497 INFO L175 Difference]: Start difference. First operand has 370 places, 385 transitions, 4521 flow. Second operand 9 states and 159 transitions. [2024-06-21 22:07:01,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 426 transitions, 5817 flow [2024-06-21 22:07:04,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 426 transitions, 5721 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-21 22:07:04,307 INFO L231 Difference]: Finished difference. Result has 373 places, 386 transitions, 4635 flow [2024-06-21 22:07:04,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4425, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4635, PETRI_PLACES=373, PETRI_TRANSITIONS=386} [2024-06-21 22:07:04,307 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 331 predicate places. [2024-06-21 22:07:04,307 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 386 transitions, 4635 flow [2024-06-21 22:07:04,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:07:04,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:07:04,308 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:07:04,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-21 22:07:04,308 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:07:04,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:07:04,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1733041364, now seen corresponding path program 8 times [2024-06-21 22:07:04,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:07:04,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648667591] [2024-06-21 22:07:04,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:07:04,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:07:04,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:07:07,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:07:07,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:07:07,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648667591] [2024-06-21 22:07:07,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648667591] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:07:07,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:07:07,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:07:07,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237621980] [2024-06-21 22:07:07,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:07:07,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:07:07,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:07:07,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:07:07,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:07:07,631 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 22:07:07,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 386 transitions, 4635 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:07:07,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:07:07,631 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 22:07:07,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:07:09,693 INFO L124 PetriNetUnfolderBase]: 3191/5216 cut-off events. [2024-06-21 22:07:09,693 INFO L125 PetriNetUnfolderBase]: For 646415/646421 co-relation queries the response was YES. [2024-06-21 22:07:09,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38127 conditions, 5216 events. 3191/5216 cut-off events. For 646415/646421 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 33108 event pairs, 763 based on Foata normal form. 16/5232 useless extension candidates. Maximal degree in co-relation 37953. Up to 4771 conditions per place. [2024-06-21 22:07:09,756 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 350 selfloop transitions, 63 changer transitions 0/418 dead transitions. [2024-06-21 22:07:09,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 418 transitions, 5601 flow [2024-06-21 22:07:09,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 22:07:09,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 22:07:09,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 160 transitions. [2024-06-21 22:07:09,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-21 22:07:09,758 INFO L175 Difference]: Start difference. First operand has 373 places, 386 transitions, 4635 flow. Second operand 10 states and 160 transitions. [2024-06-21 22:07:09,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 418 transitions, 5601 flow [2024-06-21 22:07:12,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 418 transitions, 5435 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-21 22:07:12,665 INFO L231 Difference]: Finished difference. Result has 377 places, 387 transitions, 4620 flow [2024-06-21 22:07:12,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4469, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4620, PETRI_PLACES=377, PETRI_TRANSITIONS=387} [2024-06-21 22:07:12,666 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 335 predicate places. [2024-06-21 22:07:12,666 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 387 transitions, 4620 flow [2024-06-21 22:07:12,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:07:12,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:07:12,666 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:07:12,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-21 22:07:12,666 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:07:12,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:07:12,667 INFO L85 PathProgramCache]: Analyzing trace with hash 1091135695, now seen corresponding path program 7 times [2024-06-21 22:07:12,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:07:12,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002051594] [2024-06-21 22:07:12,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:07:12,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:07:12,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:07:16,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:07:16,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:07:16,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002051594] [2024-06-21 22:07:16,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002051594] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:07:16,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:07:16,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:07:16,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922010206] [2024-06-21 22:07:16,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:07:16,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:07:16,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:07:16,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:07:16,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:07:16,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 22:07:16,234 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 387 transitions, 4620 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:07:16,234 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:07:16,234 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 22:07:16,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:07:18,259 INFO L124 PetriNetUnfolderBase]: 3211/5252 cut-off events. [2024-06-21 22:07:18,260 INFO L125 PetriNetUnfolderBase]: For 630105/630105 co-relation queries the response was YES. [2024-06-21 22:07:18,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38290 conditions, 5252 events. 3211/5252 cut-off events. For 630105/630105 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 33476 event pairs, 783 based on Foata normal form. 6/5257 useless extension candidates. Maximal degree in co-relation 38115. Up to 4656 conditions per place. [2024-06-21 22:07:18,331 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 327 selfloop transitions, 87 changer transitions 0/419 dead transitions. [2024-06-21 22:07:18,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 419 transitions, 5611 flow [2024-06-21 22:07:18,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:07:18,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:07:18,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-21 22:07:18,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4092140921409214 [2024-06-21 22:07:18,332 INFO L175 Difference]: Start difference. First operand has 377 places, 387 transitions, 4620 flow. Second operand 9 states and 151 transitions. [2024-06-21 22:07:18,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 419 transitions, 5611 flow [2024-06-21 22:07:21,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 419 transitions, 5480 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-21 22:07:21,186 INFO L231 Difference]: Finished difference. Result has 378 places, 388 transitions, 4686 flow [2024-06-21 22:07:21,186 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4489, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=387, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4686, PETRI_PLACES=378, PETRI_TRANSITIONS=388} [2024-06-21 22:07:21,186 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 336 predicate places. [2024-06-21 22:07:21,186 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 388 transitions, 4686 flow [2024-06-21 22:07:21,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:07:21,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:07:21,187 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:07:21,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-21 22:07:21,187 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:07:21,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:07:21,187 INFO L85 PathProgramCache]: Analyzing trace with hash -1364670664, now seen corresponding path program 9 times [2024-06-21 22:07:21,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:07:21,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249573383] [2024-06-21 22:07:21,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:07:21,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:07:21,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:07:24,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:07:24,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:07:24,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249573383] [2024-06-21 22:07:24,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249573383] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:07:24,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:07:24,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:07:24,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50093603] [2024-06-21 22:07:24,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:07:24,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:07:24,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:07:24,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:07:24,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:07:24,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 22:07:24,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 388 transitions, 4686 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:07:24,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:07:24,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 22:07:24,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:07:26,652 INFO L124 PetriNetUnfolderBase]: 3239/5294 cut-off events. [2024-06-21 22:07:26,652 INFO L125 PetriNetUnfolderBase]: For 655564/655570 co-relation queries the response was YES. [2024-06-21 22:07:26,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38653 conditions, 5294 events. 3239/5294 cut-off events. For 655564/655570 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 33740 event pairs, 765 based on Foata normal form. 14/5308 useless extension candidates. Maximal degree in co-relation 38477. Up to 4809 conditions per place. [2024-06-21 22:07:26,727 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 354 selfloop transitions, 66 changer transitions 0/425 dead transitions. [2024-06-21 22:07:26,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 425 transitions, 5692 flow [2024-06-21 22:07:26,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 22:07:26,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 22:07:26,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 175 transitions. [2024-06-21 22:07:26,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38802660753880264 [2024-06-21 22:07:26,729 INFO L175 Difference]: Start difference. First operand has 378 places, 388 transitions, 4686 flow. Second operand 11 states and 175 transitions. [2024-06-21 22:07:26,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 425 transitions, 5692 flow [2024-06-21 22:07:29,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 425 transitions, 5516 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-21 22:07:29,402 INFO L231 Difference]: Finished difference. Result has 382 places, 389 transitions, 4668 flow [2024-06-21 22:07:29,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4510, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4668, PETRI_PLACES=382, PETRI_TRANSITIONS=389} [2024-06-21 22:07:29,403 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 340 predicate places. [2024-06-21 22:07:29,403 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 389 transitions, 4668 flow [2024-06-21 22:07:29,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:07:29,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:07:29,403 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:07:29,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-21 22:07:29,403 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:07:29,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:07:29,403 INFO L85 PathProgramCache]: Analyzing trace with hash 751776927, now seen corresponding path program 8 times [2024-06-21 22:07:29,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:07:29,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069816091] [2024-06-21 22:07:29,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:07:29,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:07:29,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:07:32,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:07:32,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:07:32,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069816091] [2024-06-21 22:07:32,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069816091] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:07:32,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:07:32,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:07:32,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523882927] [2024-06-21 22:07:32,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:07:32,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:07:32,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:07:32,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:07:32,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:07:32,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 22:07:32,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 389 transitions, 4668 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:07:32,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:07:32,727 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 22:07:32,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:07:34,969 INFO L124 PetriNetUnfolderBase]: 3259/5332 cut-off events. [2024-06-21 22:07:34,969 INFO L125 PetriNetUnfolderBase]: For 650937/650937 co-relation queries the response was YES. [2024-06-21 22:07:35,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38970 conditions, 5332 events. 3259/5332 cut-off events. For 650937/650937 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 33740 event pairs, 648 based on Foata normal form. 6/5337 useless extension candidates. Maximal degree in co-relation 38793. Up to 3199 conditions per place. [2024-06-21 22:07:35,044 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 304 selfloop transitions, 125 changer transitions 0/434 dead transitions. [2024-06-21 22:07:35,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 434 transitions, 6218 flow [2024-06-21 22:07:35,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:07:35,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:07:35,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-21 22:07:35,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44173441734417346 [2024-06-21 22:07:35,046 INFO L175 Difference]: Start difference. First operand has 382 places, 389 transitions, 4668 flow. Second operand 9 states and 163 transitions. [2024-06-21 22:07:35,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 434 transitions, 6218 flow [2024-06-21 22:07:37,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 434 transitions, 6074 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-21 22:07:37,920 INFO L231 Difference]: Finished difference. Result has 382 places, 390 transitions, 4804 flow [2024-06-21 22:07:37,920 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4524, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4804, PETRI_PLACES=382, PETRI_TRANSITIONS=390} [2024-06-21 22:07:37,920 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 340 predicate places. [2024-06-21 22:07:37,920 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 390 transitions, 4804 flow [2024-06-21 22:07:37,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:07:37,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:07:37,921 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:07:37,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-21 22:07:37,921 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:07:37,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:07:37,921 INFO L85 PathProgramCache]: Analyzing trace with hash -1175728916, now seen corresponding path program 10 times [2024-06-21 22:07:37,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:07:37,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111843584] [2024-06-21 22:07:37,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:07:37,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:07:37,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:07:41,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:07:41,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:07:41,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111843584] [2024-06-21 22:07:41,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111843584] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:07:41,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:07:41,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:07:41,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71927154] [2024-06-21 22:07:41,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:07:41,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:07:41,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:07:41,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:07:41,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:07:41,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 22:07:41,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 390 transitions, 4804 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:07:41,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:07:41,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 22:07:41,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:07:43,332 INFO L124 PetriNetUnfolderBase]: 3333/5452 cut-off events. [2024-06-21 22:07:43,332 INFO L125 PetriNetUnfolderBase]: For 735319/735325 co-relation queries the response was YES. [2024-06-21 22:07:43,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41069 conditions, 5452 events. 3333/5452 cut-off events. For 735319/735325 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 34623 event pairs, 576 based on Foata normal form. 14/5466 useless extension candidates. Maximal degree in co-relation 40891. Up to 4731 conditions per place. [2024-06-21 22:07:43,420 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 341 selfloop transitions, 86 changer transitions 0/432 dead transitions. [2024-06-21 22:07:43,420 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 432 transitions, 6072 flow [2024-06-21 22:07:43,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 22:07:43,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 22:07:43,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 166 transitions. [2024-06-21 22:07:43,421 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40487804878048783 [2024-06-21 22:07:43,421 INFO L175 Difference]: Start difference. First operand has 382 places, 390 transitions, 4804 flow. Second operand 10 states and 166 transitions. [2024-06-21 22:07:43,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 432 transitions, 6072 flow [2024-06-21 22:07:46,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 432 transitions, 5653 flow, removed 14 selfloop flow, removed 9 redundant places. [2024-06-21 22:07:46,319 INFO L231 Difference]: Finished difference. Result has 383 places, 392 transitions, 4607 flow [2024-06-21 22:07:46,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4385, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4607, PETRI_PLACES=383, PETRI_TRANSITIONS=392} [2024-06-21 22:07:46,319 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 341 predicate places. [2024-06-21 22:07:46,319 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 392 transitions, 4607 flow [2024-06-21 22:07:46,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:07:46,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:07:46,320 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:07:46,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-21 22:07:46,320 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:07:46,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:07:46,320 INFO L85 PathProgramCache]: Analyzing trace with hash 752045697, now seen corresponding path program 9 times [2024-06-21 22:07:46,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:07:46,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058164605] [2024-06-21 22:07:46,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:07:46,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:07:46,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:07:49,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:07:49,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:07:49,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058164605] [2024-06-21 22:07:49,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058164605] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:07:49,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:07:49,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:07:49,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294255048] [2024-06-21 22:07:49,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:07:49,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:07:49,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:07:49,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:07:49,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:07:49,631 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 22:07:49,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 392 transitions, 4607 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:07:49,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:07:49,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 22:07:49,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:07:51,351 INFO L124 PetriNetUnfolderBase]: 3353/5482 cut-off events. [2024-06-21 22:07:51,352 INFO L125 PetriNetUnfolderBase]: For 729735/729735 co-relation queries the response was YES. [2024-06-21 22:07:51,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40151 conditions, 5482 events. 3353/5482 cut-off events. For 729735/729735 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 34751 event pairs, 664 based on Foata normal form. 6/5487 useless extension candidates. Maximal degree in co-relation 39975. Up to 3325 conditions per place. [2024-06-21 22:07:51,430 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 307 selfloop transitions, 123 changer transitions 0/435 dead transitions. [2024-06-21 22:07:51,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 435 transitions, 6166 flow [2024-06-21 22:07:51,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:07:51,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:07:51,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-21 22:07:51,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4363143631436314 [2024-06-21 22:07:51,431 INFO L175 Difference]: Start difference. First operand has 383 places, 392 transitions, 4607 flow. Second operand 9 states and 161 transitions. [2024-06-21 22:07:51,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 435 transitions, 6166 flow [2024-06-21 22:07:55,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 435 transitions, 6026 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-21 22:07:55,161 INFO L231 Difference]: Finished difference. Result has 386 places, 393 transitions, 4732 flow [2024-06-21 22:07:55,161 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4467, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4732, PETRI_PLACES=386, PETRI_TRANSITIONS=393} [2024-06-21 22:07:55,161 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 344 predicate places. [2024-06-21 22:07:55,162 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 393 transitions, 4732 flow [2024-06-21 22:07:55,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:07:55,162 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:07:55,162 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:07:55,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-21 22:07:55,162 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:07:55,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:07:55,163 INFO L85 PathProgramCache]: Analyzing trace with hash 494817460, now seen corresponding path program 11 times [2024-06-21 22:07:55,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:07:55,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235070571] [2024-06-21 22:07:55,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:07:55,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:07:55,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:07:58,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:07:58,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:07:58,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235070571] [2024-06-21 22:07:58,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235070571] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:07:58,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:07:58,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:07:58,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349920717] [2024-06-21 22:07:58,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:07:58,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:07:58,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:07:58,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:07:58,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:07:58,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 22:07:58,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 393 transitions, 4732 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:07:58,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:07:58,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 22:07:58,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:08:00,210 INFO L124 PetriNetUnfolderBase]: 3381/5532 cut-off events. [2024-06-21 22:08:00,210 INFO L125 PetriNetUnfolderBase]: For 756880/756886 co-relation queries the response was YES. [2024-06-21 22:08:00,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40759 conditions, 5532 events. 3381/5532 cut-off events. For 756880/756886 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 35337 event pairs, 580 based on Foata normal form. 14/5546 useless extension candidates. Maximal degree in co-relation 40581. Up to 4865 conditions per place. [2024-06-21 22:08:00,287 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 333 selfloop transitions, 86 changer transitions 0/424 dead transitions. [2024-06-21 22:08:00,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 424 transitions, 5676 flow [2024-06-21 22:08:00,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:08:00,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:08:00,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-21 22:08:00,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3983739837398374 [2024-06-21 22:08:00,289 INFO L175 Difference]: Start difference. First operand has 386 places, 393 transitions, 4732 flow. Second operand 9 states and 147 transitions. [2024-06-21 22:08:00,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 424 transitions, 5676 flow [2024-06-21 22:08:02,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 424 transitions, 5438 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-21 22:08:02,836 INFO L231 Difference]: Finished difference. Result has 389 places, 394 transitions, 4684 flow [2024-06-21 22:08:02,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4494, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4684, PETRI_PLACES=389, PETRI_TRANSITIONS=394} [2024-06-21 22:08:02,836 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 347 predicate places. [2024-06-21 22:08:02,836 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 394 transitions, 4684 flow [2024-06-21 22:08:02,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:08:02,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:08:02,836 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:08:02,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-21 22:08:02,837 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:08:02,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:08:02,837 INFO L85 PathProgramCache]: Analyzing trace with hash -1797229872, now seen corresponding path program 12 times [2024-06-21 22:08:02,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:08:02,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217917627] [2024-06-21 22:08:02,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:08:02,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:08:02,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:08:05,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:08:05,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:08:05,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217917627] [2024-06-21 22:08:05,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217917627] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:08:05,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:08:05,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:08:05,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052175250] [2024-06-21 22:08:05,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:08:05,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:08:05,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:08:05,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:08:05,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:08:05,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 22:08:05,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 394 transitions, 4684 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:08:05,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:08:05,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 22:08:05,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:08:07,656 INFO L124 PetriNetUnfolderBase]: 3442/5631 cut-off events. [2024-06-21 22:08:07,657 INFO L125 PetriNetUnfolderBase]: For 811299/811305 co-relation queries the response was YES. [2024-06-21 22:08:07,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41954 conditions, 5631 events. 3442/5631 cut-off events. For 811299/811305 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 36193 event pairs, 591 based on Foata normal form. 14/5645 useless extension candidates. Maximal degree in co-relation 41775. Up to 3821 conditions per place. [2024-06-21 22:08:07,734 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 299 selfloop transitions, 132 changer transitions 0/436 dead transitions. [2024-06-21 22:08:07,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 436 transitions, 6004 flow [2024-06-21 22:08:07,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:08:07,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:08:07,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-21 22:08:07,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43089430894308944 [2024-06-21 22:08:07,735 INFO L175 Difference]: Start difference. First operand has 389 places, 394 transitions, 4684 flow. Second operand 9 states and 159 transitions. [2024-06-21 22:08:07,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 436 transitions, 6004 flow [2024-06-21 22:08:11,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 436 transitions, 5828 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-21 22:08:11,051 INFO L231 Difference]: Finished difference. Result has 391 places, 396 transitions, 4826 flow [2024-06-21 22:08:11,051 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4508, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=394, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4826, PETRI_PLACES=391, PETRI_TRANSITIONS=396} [2024-06-21 22:08:11,051 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 349 predicate places. [2024-06-21 22:08:11,051 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 396 transitions, 4826 flow [2024-06-21 22:08:11,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:08:11,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:08:11,052 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:08:11,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-21 22:08:11,052 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:08:11,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:08:11,052 INFO L85 PathProgramCache]: Analyzing trace with hash 2129207353, now seen corresponding path program 10 times [2024-06-21 22:08:11,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:08:11,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110685251] [2024-06-21 22:08:11,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:08:11,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:08:11,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Killed by 15