./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix035.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/mix035.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix035.oepc.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/mix035.oepc.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-28 03:20:21,576 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-28 03:20:21,612 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-28 03:20:21,615 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-28 03:20:21,616 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-28 03:20:21,630 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-28 03:20:21,630 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-28 03:20:21,631 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-28 03:20:21,632 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-28 03:20:21,635 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-28 03:20:21,635 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-28 03:20:21,635 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-28 03:20:21,636 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-28 03:20:21,637 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-28 03:20:21,637 INFO L153 SettingsManager]: * Use SBE=true [2024-06-28 03:20:21,638 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-28 03:20:21,638 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-28 03:20:21,638 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-28 03:20:21,638 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-28 03:20:21,638 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-28 03:20:21,639 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-28 03:20:21,639 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-28 03:20:21,639 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-28 03:20:21,640 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-28 03:20:21,640 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-28 03:20:21,640 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-28 03:20:21,640 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-28 03:20:21,640 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-28 03:20:21,641 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-28 03:20:21,641 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-28 03:20:21,642 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-28 03:20:21,642 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-28 03:20:21,642 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 03:20:21,643 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-28 03:20:21,643 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-28 03:20:21,643 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-28 03:20:21,644 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-28 03:20:21,644 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-28 03:20:21,644 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-28 03:20:21,644 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-28 03:20:21,644 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-28 03:20:21,645 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-28 03:20:21,645 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-28 03:20:21,645 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-28 03:20:21,877 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-28 03:20:21,898 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-28 03:20:21,900 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-28 03:20:21,901 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-28 03:20:21,902 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-28 03:20:21,902 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/mix035.oepc.yml/witness.yml [2024-06-28 03:20:22,096 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-28 03:20:22,097 INFO L274 PluginConnector]: CDTParser initialized [2024-06-28 03:20:22,097 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix035.oepc.i [2024-06-28 03:20:23,189 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-28 03:20:23,410 INFO L384 CDTParser]: Found 1 translation units. [2024-06-28 03:20:23,411 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix035.oepc.i [2024-06-28 03:20:23,420 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1329c990d/8296d665ace342c096ec17c72d6c2d02/FLAG142aee65e [2024-06-28 03:20:23,430 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1329c990d/8296d665ace342c096ec17c72d6c2d02 [2024-06-28 03:20:23,430 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-28 03:20:23,431 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-28 03:20:23,432 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-28 03:20:23,432 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-28 03:20:23,435 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-28 03:20:23,436 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 03:20:22" (1/2) ... [2024-06-28 03:20:23,438 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24c976ae and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:20:23, skipping insertion in model container [2024-06-28 03:20:23,440 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 03:20:22" (1/2) ... [2024-06-28 03:20:23,441 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@10a533fd and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:20:23, skipping insertion in model container [2024-06-28 03:20:23,441 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 03:20:23" (2/2) ... [2024-06-28 03:20:23,442 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24c976ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:20:23, skipping insertion in model container [2024-06-28 03:20:23,442 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 03:20:23" (2/2) ... [2024-06-28 03:20:23,442 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-28 03:20:23,528 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-28 03:20:23,529 INFO L97 edCorrectnessWitness]: Location invariant before [L850-L850] ((((((((((((((((((((! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (a$mem_tmp == 0 || a$mem_tmp == 1))) && (! multithreaded || ((((((((((((((((((((0 <= __unbuffered_cnt && a$flush_delayed == (_Bool)0) && a$r_buff0_thd0 == (_Bool)0) && a$r_buff0_thd2 == (_Bool)0) && a$r_buff0_thd3 == (_Bool)0) && a$r_buff1_thd0 == (_Bool)0) && a$r_buff1_thd2 == (_Bool)0) && a$r_buff1_thd3 == (_Bool)0) && a$read_delayed == (_Bool)0) && a$read_delayed_var == 0) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (a == 0 || a == 1)) && (a$mem_tmp == 0 || a$mem_tmp == 1)) && (a$w_buff0 == 0 || a$w_buff0 == 1)) && (a$w_buff1 == 0 || a$w_buff1 == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1)) && (z == 0 || z == 1)))) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (a$w_buff1 == 0 || a$w_buff1 == 1))) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (a$w_buff0 == 0 || a$w_buff0 == 1)) [2024-06-28 03:20:23,530 INFO L97 edCorrectnessWitness]: Location invariant before [L851-L851] ((((((((((((((((((((! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (a$mem_tmp == 0 || a$mem_tmp == 1))) && (! multithreaded || ((((((((((((((((((((0 <= __unbuffered_cnt && a$flush_delayed == (_Bool)0) && a$r_buff0_thd0 == (_Bool)0) && a$r_buff0_thd2 == (_Bool)0) && a$r_buff0_thd3 == (_Bool)0) && a$r_buff1_thd0 == (_Bool)0) && a$r_buff1_thd2 == (_Bool)0) && a$r_buff1_thd3 == (_Bool)0) && a$read_delayed == (_Bool)0) && a$read_delayed_var == 0) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (a == 0 || a == 1)) && (a$mem_tmp == 0 || a$mem_tmp == 1)) && (a$w_buff0 == 0 || a$w_buff0 == 1)) && (a$w_buff1 == 0 || a$w_buff1 == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1)) && (z == 0 || z == 1)))) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (a$w_buff1 == 0 || a$w_buff1 == 1))) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (a$w_buff0 == 0 || a$w_buff0 == 1)) [2024-06-28 03:20:23,530 INFO L97 edCorrectnessWitness]: Location invariant before [L848-L848] ((((((((((((((((((((! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (a$mem_tmp == 0 || a$mem_tmp == 1))) && (! multithreaded || ((((((((((((((((((((0 <= __unbuffered_cnt && a$flush_delayed == (_Bool)0) && a$r_buff0_thd0 == (_Bool)0) && a$r_buff0_thd2 == (_Bool)0) && a$r_buff0_thd3 == (_Bool)0) && a$r_buff1_thd0 == (_Bool)0) && a$r_buff1_thd2 == (_Bool)0) && a$r_buff1_thd3 == (_Bool)0) && a$read_delayed == (_Bool)0) && a$read_delayed_var == 0) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (a == 0 || a == 1)) && (a$mem_tmp == 0 || a$mem_tmp == 1)) && (a$w_buff0 == 0 || a$w_buff0 == 1)) && (a$w_buff1 == 0 || a$w_buff1 == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1)) && (z == 0 || z == 1)))) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (a$w_buff1 == 0 || a$w_buff1 == 1))) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (a$w_buff0 == 0 || a$w_buff0 == 1)) [2024-06-28 03:20:23,530 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-28 03:20:23,530 INFO L106 edCorrectnessWitness]: ghost_update [L846-L846] multithreaded = 1; [2024-06-28 03:20:23,586 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-28 03:20:23,905 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 03:20:23,914 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-28 03:20:24,064 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 03:20:24,095 INFO L206 MainTranslator]: Completed translation [2024-06-28 03:20:24,095 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:20:24 WrapperNode [2024-06-28 03:20:24,095 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-28 03:20:24,096 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-28 03:20:24,096 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-28 03:20:24,097 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-28 03:20:24,102 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:20:24" (1/1) ... [2024-06-28 03:20:24,114 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:20:24" (1/1) ... [2024-06-28 03:20:24,150 INFO L138 Inliner]: procedures = 175, calls = 47, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 128 [2024-06-28 03:20:24,151 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-28 03:20:24,151 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-28 03:20:24,151 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-28 03:20:24,151 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-28 03:20:24,160 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:20:24" (1/1) ... [2024-06-28 03:20:24,160 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:20:24" (1/1) ... [2024-06-28 03:20:24,163 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:20:24" (1/1) ... [2024-06-28 03:20:24,177 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-28 03:20:24,177 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:20:24" (1/1) ... [2024-06-28 03:20:24,185 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:20:24" (1/1) ... [2024-06-28 03:20:24,192 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:20:24" (1/1) ... [2024-06-28 03:20:24,194 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:20:24" (1/1) ... [2024-06-28 03:20:24,196 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:20:24" (1/1) ... [2024-06-28 03:20:24,197 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:20:24" (1/1) ... [2024-06-28 03:20:24,200 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-28 03:20:24,200 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-28 03:20:24,201 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-28 03:20:24,201 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-28 03:20:24,201 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:20:24" (1/1) ... [2024-06-28 03:20:24,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 03:20:24,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 03:20:24,224 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-28 03:20:24,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-28 03:20:24,271 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-28 03:20:24,272 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-28 03:20:24,272 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-28 03:20:24,272 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-28 03:20:24,273 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-28 03:20:24,273 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-28 03:20:24,273 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-28 03:20:24,273 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-28 03:20:24,273 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-28 03:20:24,273 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-28 03:20:24,274 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-28 03:20:24,274 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-28 03:20:24,275 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-28 03:20:24,408 INFO L244 CfgBuilder]: Building ICFG [2024-06-28 03:20:24,410 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-28 03:20:24,689 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-28 03:20:24,690 INFO L293 CfgBuilder]: Performing block encoding [2024-06-28 03:20:24,831 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-28 03:20:24,831 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-28 03:20:24,831 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 03:20:24 BoogieIcfgContainer [2024-06-28 03:20:24,831 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-28 03:20:24,833 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-28 03:20:24,833 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-28 03:20:24,836 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-28 03:20:24,837 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 03:20:22" (1/4) ... [2024-06-28 03:20:24,837 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fcff012 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 28.06 03:20:24, skipping insertion in model container [2024-06-28 03:20:24,837 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.06 03:20:23" (2/4) ... [2024-06-28 03:20:24,838 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fcff012 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.06 03:20:24, skipping insertion in model container [2024-06-28 03:20:24,838 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:20:24" (3/4) ... [2024-06-28 03:20:24,838 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fcff012 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.06 03:20:24, skipping insertion in model container [2024-06-28 03:20:24,838 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 03:20:24" (4/4) ... [2024-06-28 03:20:24,839 INFO L112 eAbstractionObserver]: Analyzing ICFG mix035.oepc.i [2024-06-28 03:20:24,852 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-28 03:20:24,853 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-28 03:20:24,853 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-28 03:20:24,895 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-28 03:20:24,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-28 03:20:24,954 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-28 03:20:24,954 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 03:20:24,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 39 events. 0/39 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 64 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-28 03:20:24,957 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-28 03:20:24,959 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-28 03:20:24,971 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-28 03:20:24,977 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;@45df8e8f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-28 03:20:24,977 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-28 03:20:24,981 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-28 03:20:24,982 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-28 03:20:24,982 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 03:20:24,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:20:24,982 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-28 03:20:24,982 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:20:24,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:20:24,986 INFO L85 PathProgramCache]: Analyzing trace with hash 380730443, now seen corresponding path program 1 times [2024-06-28 03:20:24,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:20:24,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455609936] [2024-06-28 03:20:24,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:20:24,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:20:25,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:20:26,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:20:26,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:20:26,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455609936] [2024-06-28 03:20:26,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455609936] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:20:26,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:20:26,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-28 03:20:26,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623190099] [2024-06-28 03:20:26,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:20:26,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-28 03:20:26,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:20:26,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-28 03:20:26,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-28 03:20:26,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 42 [2024-06-28 03:20:26,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:20:26,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:20:26,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 42 [2024-06-28 03:20:26,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:20:26,623 INFO L124 PetriNetUnfolderBase]: 1286/2001 cut-off events. [2024-06-28 03:20:26,624 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2024-06-28 03:20:26,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3997 conditions, 2001 events. 1286/2001 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 9705 event pairs, 892 based on Foata normal form. 1/1938 useless extension candidates. Maximal degree in co-relation 3985. Up to 1921 conditions per place. [2024-06-28 03:20:26,636 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 32 selfloop transitions, 4 changer transitions 0/43 dead transitions. [2024-06-28 03:20:26,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 43 transitions, 173 flow [2024-06-28 03:20:26,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-28 03:20:26,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-28 03:20:26,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 78 transitions. [2024-06-28 03:20:26,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-28 03:20:26,647 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 78 transitions. [2024-06-28 03:20:26,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 43 transitions, 173 flow [2024-06-28 03:20:26,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 43 transitions, 168 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-28 03:20:26,651 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-28 03:20:26,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2024-06-28 03:20:26,655 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-28 03:20:26,655 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-28 03:20:26,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:20:26,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:20:26,656 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:20:26,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-28 03:20:26,656 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:20:26,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:20:26,657 INFO L85 PathProgramCache]: Analyzing trace with hash 810521078, now seen corresponding path program 1 times [2024-06-28 03:20:26,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:20:26,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918589131] [2024-06-28 03:20:26,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:20:26,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:20:26,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:20:27,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:20:27,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:20:27,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918589131] [2024-06-28 03:20:27,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918589131] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:20:27,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:20:27,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-28 03:20:27,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47076664] [2024-06-28 03:20:27,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:20:27,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-28 03:20:27,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:20:27,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-28 03:20:27,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-28 03:20:27,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 42 [2024-06-28 03:20:27,406 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:20:27,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:20:27,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 42 [2024-06-28 03:20:27,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:20:27,653 INFO L124 PetriNetUnfolderBase]: 1280/2000 cut-off events. [2024-06-28 03:20:27,653 INFO L125 PetriNetUnfolderBase]: For 384/384 co-relation queries the response was YES. [2024-06-28 03:20:27,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4521 conditions, 2000 events. 1280/2000 cut-off events. For 384/384 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 9691 event pairs, 750 based on Foata normal form. 3/1972 useless extension candidates. Maximal degree in co-relation 4509. Up to 1897 conditions per place. [2024-06-28 03:20:27,663 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 39 selfloop transitions, 7 changer transitions 0/53 dead transitions. [2024-06-28 03:20:27,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 53 transitions, 240 flow [2024-06-28 03:20:27,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 03:20:27,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 03:20:27,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 101 transitions. [2024-06-28 03:20:27,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6011904761904762 [2024-06-28 03:20:27,667 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 101 transitions. [2024-06-28 03:20:27,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 53 transitions, 240 flow [2024-06-28 03:20:27,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 53 transitions, 236 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-28 03:20:27,670 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 138 flow [2024-06-28 03:20:27,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=138, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2024-06-28 03:20:27,671 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2024-06-28 03:20:27,671 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 138 flow [2024-06-28 03:20:27,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:20:27,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:20:27,672 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:20:27,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-28 03:20:27,675 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:20:27,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:20:27,675 INFO L85 PathProgramCache]: Analyzing trace with hash 1521713301, now seen corresponding path program 1 times [2024-06-28 03:20:27,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:20:27,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90648247] [2024-06-28 03:20:27,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:20:27,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:20:27,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:20:29,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:20:29,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:20:29,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90648247] [2024-06-28 03:20:29,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90648247] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:20:29,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:20:29,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 03:20:29,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647457450] [2024-06-28 03:20:29,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:20:29,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 03:20:29,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:20:29,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 03:20:29,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-28 03:20:29,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 03:20:29,246 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 138 flow. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:20:29,246 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:20:29,246 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 03:20:29,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:20:29,626 INFO L124 PetriNetUnfolderBase]: 1552/2399 cut-off events. [2024-06-28 03:20:29,626 INFO L125 PetriNetUnfolderBase]: For 1253/1253 co-relation queries the response was YES. [2024-06-28 03:20:29,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6001 conditions, 2399 events. 1552/2399 cut-off events. For 1253/1253 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 11700 event pairs, 697 based on Foata normal form. 3/2365 useless extension candidates. Maximal degree in co-relation 5987. Up to 2262 conditions per place. [2024-06-28 03:20:29,639 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 54 selfloop transitions, 13 changer transitions 0/73 dead transitions. [2024-06-28 03:20:29,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 73 transitions, 374 flow [2024-06-28 03:20:29,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 03:20:29,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 03:20:29,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-06-28 03:20:29,644 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5634920634920635 [2024-06-28 03:20:29,644 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 138 flow. Second operand 6 states and 142 transitions. [2024-06-28 03:20:29,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 73 transitions, 374 flow [2024-06-28 03:20:29,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 73 transitions, 354 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-28 03:20:29,648 INFO L231 Difference]: Finished difference. Result has 51 places, 45 transitions, 196 flow [2024-06-28 03:20:29,648 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=196, PETRI_PLACES=51, PETRI_TRANSITIONS=45} [2024-06-28 03:20:29,649 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 8 predicate places. [2024-06-28 03:20:29,649 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 45 transitions, 196 flow [2024-06-28 03:20:29,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:20:29,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:20:29,650 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:20:29,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-28 03:20:29,650 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:20:29,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:20:29,650 INFO L85 PathProgramCache]: Analyzing trace with hash -927427979, now seen corresponding path program 1 times [2024-06-28 03:20:29,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:20:29,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958719035] [2024-06-28 03:20:29,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:20:29,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:20:29,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:20:31,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:20:31,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:20:31,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958719035] [2024-06-28 03:20:31,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958719035] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:20:31,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:20:31,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 03:20:31,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683776779] [2024-06-28 03:20:31,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:20:31,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 03:20:31,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:20:31,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 03:20:31,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-28 03:20:31,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 03:20:31,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 45 transitions, 196 flow. Second operand has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:20:31,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:20:31,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 03:20:31,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:20:31,798 INFO L124 PetriNetUnfolderBase]: 1543/2382 cut-off events. [2024-06-28 03:20:31,798 INFO L125 PetriNetUnfolderBase]: For 2475/2475 co-relation queries the response was YES. [2024-06-28 03:20:31,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6652 conditions, 2382 events. 1543/2382 cut-off events. For 2475/2475 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 11548 event pairs, 534 based on Foata normal form. 6/2351 useless extension candidates. Maximal degree in co-relation 6636. Up to 2217 conditions per place. [2024-06-28 03:20:31,808 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 58 selfloop transitions, 15 changer transitions 0/79 dead transitions. [2024-06-28 03:20:31,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 79 transitions, 434 flow [2024-06-28 03:20:31,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:20:31,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:20:31,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 160 transitions. [2024-06-28 03:20:31,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.54421768707483 [2024-06-28 03:20:31,810 INFO L175 Difference]: Start difference. First operand has 51 places, 45 transitions, 196 flow. Second operand 7 states and 160 transitions. [2024-06-28 03:20:31,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 79 transitions, 434 flow [2024-06-28 03:20:31,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 79 transitions, 406 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-28 03:20:31,812 INFO L231 Difference]: Finished difference. Result has 54 places, 46 transitions, 217 flow [2024-06-28 03:20:31,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=217, PETRI_PLACES=54, PETRI_TRANSITIONS=46} [2024-06-28 03:20:31,813 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 11 predicate places. [2024-06-28 03:20:31,813 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 46 transitions, 217 flow [2024-06-28 03:20:31,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:20:31,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:20:31,814 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:20:31,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-28 03:20:31,814 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:20:31,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:20:31,814 INFO L85 PathProgramCache]: Analyzing trace with hash -1592252480, now seen corresponding path program 1 times [2024-06-28 03:20:31,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:20:31,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609515] [2024-06-28 03:20:31,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:20:31,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:20:31,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:20:32,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:20:32,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:20:32,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609515] [2024-06-28 03:20:32,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609515] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:20:32,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:20:32,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 03:20:32,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724747383] [2024-06-28 03:20:32,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:20:32,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 03:20:32,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:20:32,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 03:20:32,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-28 03:20:32,419 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 03:20:32,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 46 transitions, 217 flow. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:20:32,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:20:32,420 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 03:20:32,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:20:32,836 INFO L124 PetriNetUnfolderBase]: 1533/2402 cut-off events. [2024-06-28 03:20:32,837 INFO L125 PetriNetUnfolderBase]: For 3736/3736 co-relation queries the response was YES. [2024-06-28 03:20:32,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7070 conditions, 2402 events. 1533/2402 cut-off events. For 3736/3736 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 11848 event pairs, 610 based on Foata normal form. 4/2397 useless extension candidates. Maximal degree in co-relation 7052. Up to 2260 conditions per place. [2024-06-28 03:20:32,847 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 48 selfloop transitions, 8 changer transitions 0/61 dead transitions. [2024-06-28 03:20:32,848 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 61 transitions, 375 flow [2024-06-28 03:20:32,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 03:20:32,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 03:20:32,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 97 transitions. [2024-06-28 03:20:32,849 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46190476190476193 [2024-06-28 03:20:32,849 INFO L175 Difference]: Start difference. First operand has 54 places, 46 transitions, 217 flow. Second operand 5 states and 97 transitions. [2024-06-28 03:20:32,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 61 transitions, 375 flow [2024-06-28 03:20:32,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 61 transitions, 336 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-28 03:20:32,852 INFO L231 Difference]: Finished difference. Result has 54 places, 49 transitions, 224 flow [2024-06-28 03:20:32,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=224, PETRI_PLACES=54, PETRI_TRANSITIONS=49} [2024-06-28 03:20:32,853 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 11 predicate places. [2024-06-28 03:20:32,853 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 49 transitions, 224 flow [2024-06-28 03:20:32,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:20:32,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:20:32,853 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:20:32,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-28 03:20:32,854 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:20:32,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:20:32,854 INFO L85 PathProgramCache]: Analyzing trace with hash -80306019, now seen corresponding path program 1 times [2024-06-28 03:20:32,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:20:32,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604780563] [2024-06-28 03:20:32,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:20:32,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:20:32,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:20:33,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:20:33,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:20:33,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604780563] [2024-06-28 03:20:33,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604780563] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:20:33,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:20:33,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 03:20:33,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720949792] [2024-06-28 03:20:33,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:20:33,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 03:20:33,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:20:33,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 03:20:33,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 03:20:33,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 03:20:33,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 49 transitions, 224 flow. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 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) [2024-06-28 03:20:33,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:20:33,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 03:20:33,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:20:34,086 INFO L124 PetriNetUnfolderBase]: 1571/2452 cut-off events. [2024-06-28 03:20:34,086 INFO L125 PetriNetUnfolderBase]: For 5193/5193 co-relation queries the response was YES. [2024-06-28 03:20:34,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7739 conditions, 2452 events. 1571/2452 cut-off events. For 5193/5193 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 12097 event pairs, 574 based on Foata normal form. 4/2444 useless extension candidates. Maximal degree in co-relation 7719. Up to 2267 conditions per place. [2024-06-28 03:20:34,103 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 59 selfloop transitions, 16 changer transitions 0/80 dead transitions. [2024-06-28 03:20:34,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 80 transitions, 510 flow [2024-06-28 03:20:34,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 03:20:34,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 03:20:34,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 122 transitions. [2024-06-28 03:20:34,104 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48412698412698413 [2024-06-28 03:20:34,104 INFO L175 Difference]: Start difference. First operand has 54 places, 49 transitions, 224 flow. Second operand 6 states and 122 transitions. [2024-06-28 03:20:34,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 80 transitions, 510 flow [2024-06-28 03:20:34,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 80 transitions, 476 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-28 03:20:34,110 INFO L231 Difference]: Finished difference. Result has 58 places, 58 transitions, 310 flow [2024-06-28 03:20:34,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=310, PETRI_PLACES=58, PETRI_TRANSITIONS=58} [2024-06-28 03:20:34,113 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 15 predicate places. [2024-06-28 03:20:34,113 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 58 transitions, 310 flow [2024-06-28 03:20:34,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 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) [2024-06-28 03:20:34,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:20:34,113 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:20:34,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-28 03:20:34,114 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:20:34,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:20:34,114 INFO L85 PathProgramCache]: Analyzing trace with hash -1134632039, now seen corresponding path program 2 times [2024-06-28 03:20:34,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:20:34,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922249895] [2024-06-28 03:20:34,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:20:34,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:20:34,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:20:34,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:20:34,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:20:34,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922249895] [2024-06-28 03:20:34,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922249895] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:20:34,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:20:34,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 03:20:34,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273232348] [2024-06-28 03:20:34,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:20:34,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 03:20:34,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:20:34,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 03:20:34,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 03:20:34,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 03:20:34,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 58 transitions, 310 flow. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 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) [2024-06-28 03:20:34,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:20:34,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 03:20:34,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:20:35,431 INFO L124 PetriNetUnfolderBase]: 1561/2441 cut-off events. [2024-06-28 03:20:35,431 INFO L125 PetriNetUnfolderBase]: For 7111/7111 co-relation queries the response was YES. [2024-06-28 03:20:35,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8433 conditions, 2441 events. 1561/2441 cut-off events. For 7111/7111 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 12082 event pairs, 586 based on Foata normal form. 4/2434 useless extension candidates. Maximal degree in co-relation 8411. Up to 2292 conditions per place. [2024-06-28 03:20:35,442 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 58 selfloop transitions, 11 changer transitions 0/74 dead transitions. [2024-06-28 03:20:35,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 74 transitions, 490 flow [2024-06-28 03:20:35,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 03:20:35,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 03:20:35,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 114 transitions. [2024-06-28 03:20:35,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-28 03:20:35,444 INFO L175 Difference]: Start difference. First operand has 58 places, 58 transitions, 310 flow. Second operand 6 states and 114 transitions. [2024-06-28 03:20:35,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 74 transitions, 490 flow [2024-06-28 03:20:35,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 74 transitions, 462 flow, removed 13 selfloop flow, removed 1 redundant places. [2024-06-28 03:20:35,450 INFO L231 Difference]: Finished difference. Result has 63 places, 58 transitions, 312 flow [2024-06-28 03:20:35,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=282, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=312, PETRI_PLACES=63, PETRI_TRANSITIONS=58} [2024-06-28 03:20:35,451 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 20 predicate places. [2024-06-28 03:20:35,451 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 58 transitions, 312 flow [2024-06-28 03:20:35,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 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) [2024-06-28 03:20:35,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:20:35,452 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:20:35,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-28 03:20:35,452 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:20:35,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:20:35,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1180460917, now seen corresponding path program 1 times [2024-06-28 03:20:35,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:20:35,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277160330] [2024-06-28 03:20:35,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:20:35,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:20:35,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:20:36,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:20:36,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:20:36,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277160330] [2024-06-28 03:20:36,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277160330] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:20:36,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:20:36,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:20:36,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374639350] [2024-06-28 03:20:36,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:20:36,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:20:36,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:20:36,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:20:36,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:20:36,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 03:20:36,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 58 transitions, 312 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:20:36,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:20:36,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 03:20:36,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:20:36,886 INFO L124 PetriNetUnfolderBase]: 1583/2465 cut-off events. [2024-06-28 03:20:36,886 INFO L125 PetriNetUnfolderBase]: For 8491/8491 co-relation queries the response was YES. [2024-06-28 03:20:36,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8665 conditions, 2465 events. 1583/2465 cut-off events. For 8491/8491 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 12110 event pairs, 579 based on Foata normal form. 4/2454 useless extension candidates. Maximal degree in co-relation 8640. Up to 2303 conditions per place. [2024-06-28 03:20:36,899 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 68 selfloop transitions, 14 changer transitions 0/87 dead transitions. [2024-06-28 03:20:36,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 87 transitions, 568 flow [2024-06-28 03:20:36,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:20:36,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:20:36,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-28 03:20:36,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46598639455782315 [2024-06-28 03:20:36,901 INFO L175 Difference]: Start difference. First operand has 63 places, 58 transitions, 312 flow. Second operand 7 states and 137 transitions. [2024-06-28 03:20:36,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 87 transitions, 568 flow [2024-06-28 03:20:36,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 87 transitions, 532 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-28 03:20:36,906 INFO L231 Difference]: Finished difference. Result has 64 places, 61 transitions, 342 flow [2024-06-28 03:20:36,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=342, PETRI_PLACES=64, PETRI_TRANSITIONS=61} [2024-06-28 03:20:36,907 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 21 predicate places. [2024-06-28 03:20:36,907 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 61 transitions, 342 flow [2024-06-28 03:20:36,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:20:36,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:20:36,907 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:20:36,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-28 03:20:36,908 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:20:36,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:20:36,908 INFO L85 PathProgramCache]: Analyzing trace with hash 1805481561, now seen corresponding path program 2 times [2024-06-28 03:20:36,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:20:36,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078548799] [2024-06-28 03:20:36,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:20:36,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:20:36,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:20:37,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:20:37,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:20:37,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078548799] [2024-06-28 03:20:37,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078548799] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:20:37,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:20:37,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:20:37,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011103232] [2024-06-28 03:20:37,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:20:37,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:20:37,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:20:37,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:20:37,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:20:37,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 03:20:37,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 61 transitions, 342 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:20:37,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:20:37,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 03:20:37,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:20:38,230 INFO L124 PetriNetUnfolderBase]: 1621/2517 cut-off events. [2024-06-28 03:20:38,230 INFO L125 PetriNetUnfolderBase]: For 10846/10846 co-relation queries the response was YES. [2024-06-28 03:20:38,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9468 conditions, 2517 events. 1621/2517 cut-off events. For 10846/10846 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 12329 event pairs, 551 based on Foata normal form. 4/2505 useless extension candidates. Maximal degree in co-relation 9444. Up to 2261 conditions per place. [2024-06-28 03:20:38,243 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 63 selfloop transitions, 26 changer transitions 0/94 dead transitions. [2024-06-28 03:20:38,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 94 transitions, 684 flow [2024-06-28 03:20:38,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:20:38,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:20:38,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 142 transitions. [2024-06-28 03:20:38,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48299319727891155 [2024-06-28 03:20:38,244 INFO L175 Difference]: Start difference. First operand has 64 places, 61 transitions, 342 flow. Second operand 7 states and 142 transitions. [2024-06-28 03:20:38,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 94 transitions, 684 flow [2024-06-28 03:20:38,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 94 transitions, 642 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-28 03:20:38,251 INFO L231 Difference]: Finished difference. Result has 66 places, 67 transitions, 426 flow [2024-06-28 03:20:38,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=300, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=426, PETRI_PLACES=66, PETRI_TRANSITIONS=67} [2024-06-28 03:20:38,252 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 23 predicate places. [2024-06-28 03:20:38,252 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 67 transitions, 426 flow [2024-06-28 03:20:38,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:20:38,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:20:38,253 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:20:38,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-28 03:20:38,253 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:20:38,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:20:38,254 INFO L85 PathProgramCache]: Analyzing trace with hash -813853987, now seen corresponding path program 3 times [2024-06-28 03:20:38,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:20:38,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526672690] [2024-06-28 03:20:38,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:20:38,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:20:38,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:20:39,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:20:39,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:20:39,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526672690] [2024-06-28 03:20:39,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526672690] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:20:39,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:20:39,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:20:39,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036769931] [2024-06-28 03:20:39,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:20:39,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:20:39,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:20:39,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:20:39,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:20:39,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 03:20:39,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 67 transitions, 426 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:20:39,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:20:39,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 03:20:39,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:20:39,573 INFO L124 PetriNetUnfolderBase]: 1611/2506 cut-off events. [2024-06-28 03:20:39,573 INFO L125 PetriNetUnfolderBase]: For 13676/13676 co-relation queries the response was YES. [2024-06-28 03:20:39,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9961 conditions, 2506 events. 1611/2506 cut-off events. For 13676/13676 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 12324 event pairs, 581 based on Foata normal form. 4/2495 useless extension candidates. Maximal degree in co-relation 9936. Up to 2342 conditions per place. [2024-06-28 03:20:39,587 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 69 selfloop transitions, 14 changer transitions 0/88 dead transitions. [2024-06-28 03:20:39,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 88 transitions, 648 flow [2024-06-28 03:20:39,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:20:39,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:20:39,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-28 03:20:39,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4489795918367347 [2024-06-28 03:20:39,589 INFO L175 Difference]: Start difference. First operand has 66 places, 67 transitions, 426 flow. Second operand 7 states and 132 transitions. [2024-06-28 03:20:39,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 88 transitions, 648 flow [2024-06-28 03:20:39,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 88 transitions, 592 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-28 03:20:39,601 INFO L231 Difference]: Finished difference. Result has 70 places, 67 transitions, 406 flow [2024-06-28 03:20:39,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=370, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=406, PETRI_PLACES=70, PETRI_TRANSITIONS=67} [2024-06-28 03:20:39,602 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 27 predicate places. [2024-06-28 03:20:39,603 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 67 transitions, 406 flow [2024-06-28 03:20:39,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:20:39,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:20:39,603 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:20:39,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-28 03:20:39,603 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)] === [2024-06-28 03:20:39,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:20:39,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1404626615, now seen corresponding path program 1 times [2024-06-28 03:20:39,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:20:39,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954747153] [2024-06-28 03:20:39,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:20:39,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:20:39,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:20:40,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:20:40,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:20:40,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954747153] [2024-06-28 03:20:40,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954747153] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:20:40,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:20:40,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:20:40,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637982540] [2024-06-28 03:20:40,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:20:40,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:20:40,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:20:40,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:20:40,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:20:40,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:20:40,912 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 67 transitions, 406 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:20:40,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:20:40,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:20:40,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:20:41,517 INFO L124 PetriNetUnfolderBase]: 1962/2995 cut-off events. [2024-06-28 03:20:41,517 INFO L125 PetriNetUnfolderBase]: For 18161/18161 co-relation queries the response was YES. [2024-06-28 03:20:41,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11865 conditions, 2995 events. 1962/2995 cut-off events. For 18161/18161 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 14250 event pairs, 723 based on Foata normal form. 4/2979 useless extension candidates. Maximal degree in co-relation 11838. Up to 2853 conditions per place. [2024-06-28 03:20:41,532 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 73 selfloop transitions, 15 changer transitions 0/92 dead transitions. [2024-06-28 03:20:41,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 92 transitions, 679 flow [2024-06-28 03:20:41,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:20:41,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:20:41,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-28 03:20:41,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42517006802721086 [2024-06-28 03:20:41,533 INFO L175 Difference]: Start difference. First operand has 70 places, 67 transitions, 406 flow. Second operand 7 states and 125 transitions. [2024-06-28 03:20:41,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 92 transitions, 679 flow [2024-06-28 03:20:41,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 92 transitions, 630 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-28 03:20:41,544 INFO L231 Difference]: Finished difference. Result has 72 places, 72 transitions, 451 flow [2024-06-28 03:20:41,544 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=362, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=451, PETRI_PLACES=72, PETRI_TRANSITIONS=72} [2024-06-28 03:20:41,544 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 29 predicate places. [2024-06-28 03:20:41,544 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 72 transitions, 451 flow [2024-06-28 03:20:41,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:20:41,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:20:41,545 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:20:41,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-28 03:20:41,545 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:20:41,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:20:41,546 INFO L85 PathProgramCache]: Analyzing trace with hash 875555837, now seen corresponding path program 1 times [2024-06-28 03:20:41,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:20:41,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012811692] [2024-06-28 03:20:41,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:20:41,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:20:41,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:20:42,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:20:42,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:20:42,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012811692] [2024-06-28 03:20:42,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012811692] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:20:42,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:20:42,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 03:20:42,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567412825] [2024-06-28 03:20:42,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:20:42,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 03:20:42,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:20:42,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 03:20:42,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-06-28 03:20:42,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 03:20:42,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 72 transitions, 451 flow. Second operand has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:20:42,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:20:42,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 03:20:42,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:20:42,655 INFO L124 PetriNetUnfolderBase]: 1799/2813 cut-off events. [2024-06-28 03:20:42,655 INFO L125 PetriNetUnfolderBase]: For 21116/21122 co-relation queries the response was YES. [2024-06-28 03:20:42,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11762 conditions, 2813 events. 1799/2813 cut-off events. For 21116/21122 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 13854 event pairs, 723 based on Foata normal form. 7/2809 useless extension candidates. Maximal degree in co-relation 11733. Up to 2667 conditions per place. [2024-06-28 03:20:42,671 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 67 selfloop transitions, 8 changer transitions 0/83 dead transitions. [2024-06-28 03:20:42,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 83 transitions, 641 flow [2024-06-28 03:20:42,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 03:20:42,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 03:20:42,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 92 transitions. [2024-06-28 03:20:42,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4380952380952381 [2024-06-28 03:20:42,673 INFO L175 Difference]: Start difference. First operand has 72 places, 72 transitions, 451 flow. Second operand 5 states and 92 transitions. [2024-06-28 03:20:42,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 83 transitions, 641 flow [2024-06-28 03:20:42,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 83 transitions, 596 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-28 03:20:42,686 INFO L231 Difference]: Finished difference. Result has 73 places, 75 transitions, 454 flow [2024-06-28 03:20:42,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=406, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=454, PETRI_PLACES=73, PETRI_TRANSITIONS=75} [2024-06-28 03:20:42,687 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 30 predicate places. [2024-06-28 03:20:42,687 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 75 transitions, 454 flow [2024-06-28 03:20:42,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:20:42,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:20:42,687 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:20:42,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-28 03:20:42,687 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:20:42,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:20:42,688 INFO L85 PathProgramCache]: Analyzing trace with hash -613800298, now seen corresponding path program 1 times [2024-06-28 03:20:42,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:20:42,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264488400] [2024-06-28 03:20:42,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:20:42,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:20:42,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:20:43,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:20:43,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:20:43,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264488400] [2024-06-28 03:20:43,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264488400] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:20:43,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:20:43,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:20:43,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898459545] [2024-06-28 03:20:43,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:20:43,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:20:43,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:20:43,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:20:43,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:20:44,044 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 03:20:44,045 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 75 transitions, 454 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:20:44,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:20:44,045 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 03:20:44,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:20:44,654 INFO L124 PetriNetUnfolderBase]: 1897/2928 cut-off events. [2024-06-28 03:20:44,654 INFO L125 PetriNetUnfolderBase]: For 24175/24175 co-relation queries the response was YES. [2024-06-28 03:20:44,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12649 conditions, 2928 events. 1897/2928 cut-off events. For 24175/24175 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 14540 event pairs, 682 based on Foata normal form. 4/2926 useless extension candidates. Maximal degree in co-relation 12619. Up to 2693 conditions per place. [2024-06-28 03:20:44,671 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 93 selfloop transitions, 23 changer transitions 0/122 dead transitions. [2024-06-28 03:20:44,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 122 transitions, 908 flow [2024-06-28 03:20:44,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:20:44,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:20:44,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-28 03:20:44,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47354497354497355 [2024-06-28 03:20:44,673 INFO L175 Difference]: Start difference. First operand has 73 places, 75 transitions, 454 flow. Second operand 9 states and 179 transitions. [2024-06-28 03:20:44,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 122 transitions, 908 flow [2024-06-28 03:20:44,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 122 transitions, 882 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-28 03:20:44,688 INFO L231 Difference]: Finished difference. Result has 79 places, 81 transitions, 556 flow [2024-06-28 03:20:44,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=428, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=556, PETRI_PLACES=79, PETRI_TRANSITIONS=81} [2024-06-28 03:20:44,689 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 36 predicate places. [2024-06-28 03:20:44,689 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 81 transitions, 556 flow [2024-06-28 03:20:44,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:20:44,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:20:44,690 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:20:44,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-28 03:20:44,690 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:20:44,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:20:44,690 INFO L85 PathProgramCache]: Analyzing trace with hash -613710088, now seen corresponding path program 2 times [2024-06-28 03:20:44,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:20:44,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829047421] [2024-06-28 03:20:44,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:20:44,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:20:44,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:20:45,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:20:45,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:20:45,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829047421] [2024-06-28 03:20:45,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829047421] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:20:45,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:20:45,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:20:45,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845605870] [2024-06-28 03:20:45,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:20:45,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:20:45,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:20:45,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:20:45,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:20:46,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 03:20:46,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 81 transitions, 556 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:20:46,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:20:46,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 03:20:46,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:20:46,603 INFO L124 PetriNetUnfolderBase]: 1887/2914 cut-off events. [2024-06-28 03:20:46,604 INFO L125 PetriNetUnfolderBase]: For 28078/28078 co-relation queries the response was YES. [2024-06-28 03:20:46,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13231 conditions, 2914 events. 1887/2914 cut-off events. For 28078/28078 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 14471 event pairs, 684 based on Foata normal form. 4/2912 useless extension candidates. Maximal degree in co-relation 13200. Up to 2718 conditions per place. [2024-06-28 03:20:46,617 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 89 selfloop transitions, 17 changer transitions 0/112 dead transitions. [2024-06-28 03:20:46,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 112 transitions, 850 flow [2024-06-28 03:20:46,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:20:46,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:20:46,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-28 03:20:46,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46130952380952384 [2024-06-28 03:20:46,630 INFO L175 Difference]: Start difference. First operand has 79 places, 81 transitions, 556 flow. Second operand 8 states and 155 transitions. [2024-06-28 03:20:46,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 112 transitions, 850 flow [2024-06-28 03:20:46,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 112 transitions, 780 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-28 03:20:46,648 INFO L231 Difference]: Finished difference. Result has 82 places, 81 transitions, 528 flow [2024-06-28 03:20:46,648 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=486, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=528, PETRI_PLACES=82, PETRI_TRANSITIONS=81} [2024-06-28 03:20:46,648 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 39 predicate places. [2024-06-28 03:20:46,648 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 81 transitions, 528 flow [2024-06-28 03:20:46,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:20:46,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:20:46,649 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:20:46,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-28 03:20:46,649 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:20:46,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:20:46,649 INFO L85 PathProgramCache]: Analyzing trace with hash 2060562272, now seen corresponding path program 3 times [2024-06-28 03:20:46,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:20:46,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989102009] [2024-06-28 03:20:46,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:20:46,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:20:46,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:20:47,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:20:47,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:20:47,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989102009] [2024-06-28 03:20:47,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989102009] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:20:47,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:20:47,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:20:47,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588953725] [2024-06-28 03:20:47,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:20:47,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:20:47,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:20:47,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:20:47,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:20:47,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 03:20:47,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 81 transitions, 528 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:20:47,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:20:47,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 03:20:47,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:20:48,384 INFO L124 PetriNetUnfolderBase]: 1909/2948 cut-off events. [2024-06-28 03:20:48,385 INFO L125 PetriNetUnfolderBase]: For 31486/31486 co-relation queries the response was YES. [2024-06-28 03:20:48,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13599 conditions, 2948 events. 1909/2948 cut-off events. For 31486/31486 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 14748 event pairs, 622 based on Foata normal form. 4/2949 useless extension candidates. Maximal degree in co-relation 13566. Up to 2621 conditions per place. [2024-06-28 03:20:48,398 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 78 selfloop transitions, 36 changer transitions 0/120 dead transitions. [2024-06-28 03:20:48,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 120 transitions, 982 flow [2024-06-28 03:20:48,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:20:48,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:20:48,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-28 03:20:48,400 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4791666666666667 [2024-06-28 03:20:48,400 INFO L175 Difference]: Start difference. First operand has 82 places, 81 transitions, 528 flow. Second operand 8 states and 161 transitions. [2024-06-28 03:20:48,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 120 transitions, 982 flow [2024-06-28 03:20:48,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 120 transitions, 940 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-28 03:20:48,416 INFO L231 Difference]: Finished difference. Result has 84 places, 87 transitions, 673 flow [2024-06-28 03:20:48,416 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=486, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=673, PETRI_PLACES=84, PETRI_TRANSITIONS=87} [2024-06-28 03:20:48,416 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 41 predicate places. [2024-06-28 03:20:48,416 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 87 transitions, 673 flow [2024-06-28 03:20:48,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:20:48,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:20:48,417 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:20:48,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-28 03:20:48,417 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:20:48,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:20:48,417 INFO L85 PathProgramCache]: Analyzing trace with hash 540331064, now seen corresponding path program 4 times [2024-06-28 03:20:48,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:20:48,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848266589] [2024-06-28 03:20:48,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:20:48,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:20:48,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:20:49,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:20:49,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:20:49,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848266589] [2024-06-28 03:20:49,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848266589] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:20:49,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:20:49,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:20:49,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118963587] [2024-06-28 03:20:49,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:20:49,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:20:49,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:20:49,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:20:49,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:20:49,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 03:20:49,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 87 transitions, 673 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:20:49,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:20:49,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 03:20:49,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:20:50,206 INFO L124 PetriNetUnfolderBase]: 1902/2941 cut-off events. [2024-06-28 03:20:50,207 INFO L125 PetriNetUnfolderBase]: For 36561/36561 co-relation queries the response was YES. [2024-06-28 03:20:50,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14382 conditions, 2941 events. 1902/2941 cut-off events. For 36561/36561 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 14672 event pairs, 658 based on Foata normal form. 4/2939 useless extension candidates. Maximal degree in co-relation 14347. Up to 2694 conditions per place. [2024-06-28 03:20:50,222 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 90 selfloop transitions, 27 changer transitions 0/123 dead transitions. [2024-06-28 03:20:50,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 123 transitions, 1191 flow [2024-06-28 03:20:50,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:20:50,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:20:50,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-28 03:20:50,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46130952380952384 [2024-06-28 03:20:50,224 INFO L175 Difference]: Start difference. First operand has 84 places, 87 transitions, 673 flow. Second operand 8 states and 155 transitions. [2024-06-28 03:20:50,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 123 transitions, 1191 flow [2024-06-28 03:20:50,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 123 transitions, 1133 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-28 03:20:50,245 INFO L231 Difference]: Finished difference. Result has 89 places, 93 transitions, 785 flow [2024-06-28 03:20:50,245 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=615, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=785, PETRI_PLACES=89, PETRI_TRANSITIONS=93} [2024-06-28 03:20:50,246 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 46 predicate places. [2024-06-28 03:20:50,246 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 93 transitions, 785 flow [2024-06-28 03:20:50,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:20:50,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:20:50,246 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:20:50,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-28 03:20:50,246 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:20:50,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:20:50,247 INFO L85 PathProgramCache]: Analyzing trace with hash -465885286, now seen corresponding path program 1 times [2024-06-28 03:20:50,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:20:50,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048153677] [2024-06-28 03:20:50,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:20:50,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:20:50,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:20:51,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:20:51,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:20:51,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048153677] [2024-06-28 03:20:51,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048153677] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:20:51,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:20:51,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:20:51,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988845286] [2024-06-28 03:20:51,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:20:51,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:20:51,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:20:51,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:20:51,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:20:51,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:20:51,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 93 transitions, 785 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:20:51,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:20:51,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:20:51,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:20:51,885 INFO L124 PetriNetUnfolderBase]: 2063/3147 cut-off events. [2024-06-28 03:20:51,886 INFO L125 PetriNetUnfolderBase]: For 42227/42227 co-relation queries the response was YES. [2024-06-28 03:20:51,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16068 conditions, 3147 events. 2063/3147 cut-off events. For 42227/42227 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 14985 event pairs, 734 based on Foata normal form. 2/3148 useless extension candidates. Maximal degree in co-relation 16030. Up to 2993 conditions per place. [2024-06-28 03:20:51,902 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 93 selfloop transitions, 19 changer transitions 0/116 dead transitions. [2024-06-28 03:20:51,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 116 transitions, 1095 flow [2024-06-28 03:20:51,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:20:51,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:20:51,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-28 03:20:51,903 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-28 03:20:51,903 INFO L175 Difference]: Start difference. First operand has 89 places, 93 transitions, 785 flow. Second operand 7 states and 126 transitions. [2024-06-28 03:20:51,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 116 transitions, 1095 flow [2024-06-28 03:20:51,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 116 transitions, 970 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-28 03:20:51,931 INFO L231 Difference]: Finished difference. Result has 91 places, 96 transitions, 750 flow [2024-06-28 03:20:51,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=664, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=750, PETRI_PLACES=91, PETRI_TRANSITIONS=96} [2024-06-28 03:20:51,931 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 48 predicate places. [2024-06-28 03:20:51,931 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 96 transitions, 750 flow [2024-06-28 03:20:51,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:20:51,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:20:51,932 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:20:51,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-28 03:20:51,932 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:20:51,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:20:51,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1358128987, now seen corresponding path program 1 times [2024-06-28 03:20:51,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:20:51,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472774151] [2024-06-28 03:20:51,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:20:51,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:20:51,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:20:52,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:20:52,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:20:52,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472774151] [2024-06-28 03:20:52,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472774151] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:20:52,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:20:52,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:20:52,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292029995] [2024-06-28 03:20:52,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:20:52,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:20:52,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:20:52,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:20:52,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:20:52,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:20:52,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 96 transitions, 750 flow. Second operand has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 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) [2024-06-28 03:20:52,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:20:52,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:20:52,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:20:53,202 INFO L124 PetriNetUnfolderBase]: 2145/3233 cut-off events. [2024-06-28 03:20:53,202 INFO L125 PetriNetUnfolderBase]: For 52649/52669 co-relation queries the response was YES. [2024-06-28 03:20:53,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17087 conditions, 3233 events. 2145/3233 cut-off events. For 52649/52669 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 15400 event pairs, 811 based on Foata normal form. 7/3225 useless extension candidates. Maximal degree in co-relation 17048. Up to 3168 conditions per place. [2024-06-28 03:20:53,219 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 88 selfloop transitions, 11 changer transitions 0/108 dead transitions. [2024-06-28 03:20:53,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 108 transitions, 994 flow [2024-06-28 03:20:53,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 03:20:53,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 03:20:53,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-06-28 03:20:53,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4007936507936508 [2024-06-28 03:20:53,220 INFO L175 Difference]: Start difference. First operand has 91 places, 96 transitions, 750 flow. Second operand 6 states and 101 transitions. [2024-06-28 03:20:53,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 108 transitions, 994 flow [2024-06-28 03:20:53,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 108 transitions, 952 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-28 03:20:53,249 INFO L231 Difference]: Finished difference. Result has 91 places, 99 transitions, 766 flow [2024-06-28 03:20:53,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=708, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=766, PETRI_PLACES=91, PETRI_TRANSITIONS=99} [2024-06-28 03:20:53,249 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 48 predicate places. [2024-06-28 03:20:53,250 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 99 transitions, 766 flow [2024-06-28 03:20:53,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 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) [2024-06-28 03:20:53,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:20:53,250 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:20:53,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-28 03:20:53,250 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:20:53,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:20:53,251 INFO L85 PathProgramCache]: Analyzing trace with hash -1847999588, now seen corresponding path program 1 times [2024-06-28 03:20:53,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:20:53,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770800532] [2024-06-28 03:20:53,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:20:53,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:20:53,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:20:54,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:20:54,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:20:54,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770800532] [2024-06-28 03:20:54,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770800532] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:20:54,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:20:54,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:20:54,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054283416] [2024-06-28 03:20:54,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:20:54,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:20:54,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:20:54,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:20:54,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:20:54,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 03:20:54,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 99 transitions, 766 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:20:54,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:20:54,553 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 03:20:54,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:20:55,346 INFO L124 PetriNetUnfolderBase]: 2214/3406 cut-off events. [2024-06-28 03:20:55,346 INFO L125 PetriNetUnfolderBase]: For 64599/64599 co-relation queries the response was YES. [2024-06-28 03:20:55,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18874 conditions, 3406 events. 2214/3406 cut-off events. For 64599/64599 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 17514 event pairs, 586 based on Foata normal form. 16/3408 useless extension candidates. Maximal degree in co-relation 18834. Up to 2867 conditions per place. [2024-06-28 03:20:55,366 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 121 selfloop transitions, 26 changer transitions 0/154 dead transitions. [2024-06-28 03:20:55,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 154 transitions, 1352 flow [2024-06-28 03:20:55,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:20:55,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:20:55,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 201 transitions. [2024-06-28 03:20:55,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4785714285714286 [2024-06-28 03:20:55,368 INFO L175 Difference]: Start difference. First operand has 91 places, 99 transitions, 766 flow. Second operand 10 states and 201 transitions. [2024-06-28 03:20:55,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 154 transitions, 1352 flow [2024-06-28 03:20:55,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 154 transitions, 1316 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-28 03:20:55,401 INFO L231 Difference]: Finished difference. Result has 97 places, 101 transitions, 842 flow [2024-06-28 03:20:55,401 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=730, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=842, PETRI_PLACES=97, PETRI_TRANSITIONS=101} [2024-06-28 03:20:55,402 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 54 predicate places. [2024-06-28 03:20:55,402 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 101 transitions, 842 flow [2024-06-28 03:20:55,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:20:55,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:20:55,402 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:20:55,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-28 03:20:55,403 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:20:55,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:20:55,403 INFO L85 PathProgramCache]: Analyzing trace with hash 285210566, now seen corresponding path program 2 times [2024-06-28 03:20:55,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:20:55,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810331078] [2024-06-28 03:20:55,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:20:55,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:20:55,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:20:56,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:20:56,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:20:56,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810331078] [2024-06-28 03:20:56,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810331078] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:20:56,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:20:56,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:20:56,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970576276] [2024-06-28 03:20:56,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:20:56,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:20:56,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:20:56,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:20:56,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:20:56,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 03:20:56,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 101 transitions, 842 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:20:56,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:20:56,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 03:20:56,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:20:57,542 INFO L124 PetriNetUnfolderBase]: 2285/3535 cut-off events. [2024-06-28 03:20:57,543 INFO L125 PetriNetUnfolderBase]: For 73557/73557 co-relation queries the response was YES. [2024-06-28 03:20:57,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20030 conditions, 3535 events. 2285/3535 cut-off events. For 73557/73557 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 18479 event pairs, 725 based on Foata normal form. 20/3545 useless extension candidates. Maximal degree in co-relation 19989. Up to 3167 conditions per place. [2024-06-28 03:20:57,564 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 119 selfloop transitions, 24 changer transitions 0/150 dead transitions. [2024-06-28 03:20:57,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 150 transitions, 1304 flow [2024-06-28 03:20:57,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:20:57,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:20:57,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 197 transitions. [2024-06-28 03:20:57,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46904761904761905 [2024-06-28 03:20:57,566 INFO L175 Difference]: Start difference. First operand has 97 places, 101 transitions, 842 flow. Second operand 10 states and 197 transitions. [2024-06-28 03:20:57,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 150 transitions, 1304 flow [2024-06-28 03:20:57,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 150 transitions, 1266 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-28 03:20:57,603 INFO L231 Difference]: Finished difference. Result has 101 places, 102 transitions, 889 flow [2024-06-28 03:20:57,603 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=804, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=889, PETRI_PLACES=101, PETRI_TRANSITIONS=102} [2024-06-28 03:20:57,603 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 58 predicate places. [2024-06-28 03:20:57,603 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 102 transitions, 889 flow [2024-06-28 03:20:57,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:20:57,604 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:20:57,604 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:20:57,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-28 03:20:57,604 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:20:57,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:20:57,604 INFO L85 PathProgramCache]: Analyzing trace with hash -214270282, now seen corresponding path program 3 times [2024-06-28 03:20:57,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:20:57,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717733924] [2024-06-28 03:20:57,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:20:57,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:20:57,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:20:58,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:20:58,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:20:58,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717733924] [2024-06-28 03:20:58,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717733924] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:20:58,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:20:58,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:20:58,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375582310] [2024-06-28 03:20:58,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:20:58,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:20:58,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:20:58,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:20:58,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:20:59,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 03:20:59,014 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 102 transitions, 889 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:20:59,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:20:59,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 03:20:59,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:20:59,689 INFO L124 PetriNetUnfolderBase]: 2246/3480 cut-off events. [2024-06-28 03:20:59,689 INFO L125 PetriNetUnfolderBase]: For 76205/76205 co-relation queries the response was YES. [2024-06-28 03:20:59,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19718 conditions, 3480 events. 2246/3480 cut-off events. For 76205/76205 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 18148 event pairs, 695 based on Foata normal form. 20/3492 useless extension candidates. Maximal degree in co-relation 19675. Up to 3139 conditions per place. [2024-06-28 03:20:59,710 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 117 selfloop transitions, 18 changer transitions 0/142 dead transitions. [2024-06-28 03:20:59,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 142 transitions, 1285 flow [2024-06-28 03:20:59,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:20:59,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:20:59,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-28 03:20:59,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46296296296296297 [2024-06-28 03:20:59,712 INFO L175 Difference]: Start difference. First operand has 101 places, 102 transitions, 889 flow. Second operand 9 states and 175 transitions. [2024-06-28 03:20:59,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 142 transitions, 1285 flow [2024-06-28 03:20:59,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 142 transitions, 1226 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-28 03:20:59,754 INFO L231 Difference]: Finished difference. Result has 102 places, 102 transitions, 873 flow [2024-06-28 03:20:59,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=830, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=873, PETRI_PLACES=102, PETRI_TRANSITIONS=102} [2024-06-28 03:20:59,754 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 59 predicate places. [2024-06-28 03:20:59,754 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 102 transitions, 873 flow [2024-06-28 03:20:59,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:20:59,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:20:59,755 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:20:59,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-28 03:20:59,755 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:20:59,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:20:59,755 INFO L85 PathProgramCache]: Analyzing trace with hash 289794536, now seen corresponding path program 4 times [2024-06-28 03:20:59,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:20:59,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364384479] [2024-06-28 03:20:59,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:20:59,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:20:59,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:21:00,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:21:00,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:21:00,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364384479] [2024-06-28 03:21:00,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364384479] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:21:00,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:21:00,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:21:00,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095597349] [2024-06-28 03:21:00,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:21:00,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:21:00,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:21:00,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:21:00,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:21:01,144 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 03:21:01,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 102 transitions, 873 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:21:01,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:21:01,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 03:21:01,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:21:01,739 INFO L124 PetriNetUnfolderBase]: 2318/3604 cut-off events. [2024-06-28 03:21:01,739 INFO L125 PetriNetUnfolderBase]: For 83096/83096 co-relation queries the response was YES. [2024-06-28 03:21:01,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20498 conditions, 3604 events. 2318/3604 cut-off events. For 83096/83096 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 19105 event pairs, 642 based on Foata normal form. 20/3621 useless extension candidates. Maximal degree in co-relation 20454. Up to 3102 conditions per place. [2024-06-28 03:21:01,762 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 96 selfloop transitions, 41 changer transitions 0/144 dead transitions. [2024-06-28 03:21:01,762 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 144 transitions, 1385 flow [2024-06-28 03:21:01,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:21:01,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:21:01,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 181 transitions. [2024-06-28 03:21:01,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47883597883597884 [2024-06-28 03:21:01,763 INFO L175 Difference]: Start difference. First operand has 102 places, 102 transitions, 873 flow. Second operand 9 states and 181 transitions. [2024-06-28 03:21:01,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 144 transitions, 1385 flow [2024-06-28 03:21:01,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 144 transitions, 1339 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-28 03:21:01,801 INFO L231 Difference]: Finished difference. Result has 103 places, 103 transitions, 946 flow [2024-06-28 03:21:01,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=827, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=946, PETRI_PLACES=103, PETRI_TRANSITIONS=103} [2024-06-28 03:21:01,801 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 60 predicate places. [2024-06-28 03:21:01,801 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 103 transitions, 946 flow [2024-06-28 03:21:01,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:21:01,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:21:01,802 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:21:01,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-28 03:21:01,802 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:21:01,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:21:01,802 INFO L85 PathProgramCache]: Analyzing trace with hash -546893394, now seen corresponding path program 1 times [2024-06-28 03:21:01,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:21:01,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980196097] [2024-06-28 03:21:01,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:21:01,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:21:01,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:21:03,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:21:03,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:21:03,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980196097] [2024-06-28 03:21:03,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980196097] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:21:03,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:21:03,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:21:03,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393536473] [2024-06-28 03:21:03,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:21:03,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:21:03,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:21:03,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:21:03,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:21:03,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:21:03,135 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 103 transitions, 946 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:21:03,135 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:21:03,135 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:21:03,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:21:03,779 INFO L124 PetriNetUnfolderBase]: 2500/3844 cut-off events. [2024-06-28 03:21:03,779 INFO L125 PetriNetUnfolderBase]: For 88018/88020 co-relation queries the response was YES. [2024-06-28 03:21:03,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21982 conditions, 3844 events. 2500/3844 cut-off events. For 88018/88020 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 19535 event pairs, 796 based on Foata normal form. 4/3847 useless extension candidates. Maximal degree in co-relation 21937. Up to 3601 conditions per place. [2024-06-28 03:21:03,800 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 107 selfloop transitions, 26 changer transitions 0/138 dead transitions. [2024-06-28 03:21:03,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 138 transitions, 1350 flow [2024-06-28 03:21:03,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:21:03,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:21:03,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-28 03:21:03,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2024-06-28 03:21:03,802 INFO L175 Difference]: Start difference. First operand has 103 places, 103 transitions, 946 flow. Second operand 8 states and 149 transitions. [2024-06-28 03:21:03,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 138 transitions, 1350 flow [2024-06-28 03:21:03,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 138 transitions, 1257 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-28 03:21:03,860 INFO L231 Difference]: Finished difference. Result has 105 places, 108 transitions, 980 flow [2024-06-28 03:21:03,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=857, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=980, PETRI_PLACES=105, PETRI_TRANSITIONS=108} [2024-06-28 03:21:03,861 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 62 predicate places. [2024-06-28 03:21:03,861 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 108 transitions, 980 flow [2024-06-28 03:21:03,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:21:03,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:21:03,861 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:21:03,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-28 03:21:03,861 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)] === [2024-06-28 03:21:03,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:21:03,862 INFO L85 PathProgramCache]: Analyzing trace with hash -404782594, now seen corresponding path program 1 times [2024-06-28 03:21:03,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:21:03,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678087073] [2024-06-28 03:21:03,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:21:03,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:21:03,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:21:04,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:21:04,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:21:04,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678087073] [2024-06-28 03:21:04,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678087073] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:21:04,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:21:04,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:21:04,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807066606] [2024-06-28 03:21:04,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:21:04,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:21:04,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:21:04,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:21:04,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:21:04,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 03:21:04,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 108 transitions, 980 flow. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:21:04,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:21:04,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 03:21:04,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:21:05,199 INFO L124 PetriNetUnfolderBase]: 2421/3758 cut-off events. [2024-06-28 03:21:05,200 INFO L125 PetriNetUnfolderBase]: For 93299/93323 co-relation queries the response was YES. [2024-06-28 03:21:05,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21988 conditions, 3758 events. 2421/3758 cut-off events. For 93299/93323 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 19408 event pairs, 853 based on Foata normal form. 8/3758 useless extension candidates. Maximal degree in co-relation 21941. Up to 3525 conditions per place. [2024-06-28 03:21:05,223 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 99 selfloop transitions, 18 changer transitions 0/130 dead transitions. [2024-06-28 03:21:05,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 130 transitions, 1356 flow [2024-06-28 03:21:05,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 03:21:05,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 03:21:05,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 115 transitions. [2024-06-28 03:21:05,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45634920634920634 [2024-06-28 03:21:05,224 INFO L175 Difference]: Start difference. First operand has 105 places, 108 transitions, 980 flow. Second operand 6 states and 115 transitions. [2024-06-28 03:21:05,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 130 transitions, 1356 flow [2024-06-28 03:21:05,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 130 transitions, 1275 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-28 03:21:05,297 INFO L231 Difference]: Finished difference. Result has 106 places, 114 transitions, 1004 flow [2024-06-28 03:21:05,298 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=899, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1004, PETRI_PLACES=106, PETRI_TRANSITIONS=114} [2024-06-28 03:21:05,299 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 63 predicate places. [2024-06-28 03:21:05,299 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 114 transitions, 1004 flow [2024-06-28 03:21:05,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:21:05,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:21:05,299 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:21:05,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-28 03:21:05,299 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:21:05,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:21:05,300 INFO L85 PathProgramCache]: Analyzing trace with hash 989814718, now seen corresponding path program 5 times [2024-06-28 03:21:05,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:21:05,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718549775] [2024-06-28 03:21:05,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:21:05,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:21:05,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:21:06,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:21:06,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:21:06,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718549775] [2024-06-28 03:21:06,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718549775] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:21:06,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:21:06,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:21:06,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982230532] [2024-06-28 03:21:06,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:21:06,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:21:06,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:21:06,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:21:06,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:21:06,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 03:21:06,716 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 114 transitions, 1004 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:21:06,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:21:06,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 03:21:06,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:21:07,418 INFO L124 PetriNetUnfolderBase]: 2429/3787 cut-off events. [2024-06-28 03:21:07,419 INFO L125 PetriNetUnfolderBase]: For 104098/104098 co-relation queries the response was YES. [2024-06-28 03:21:07,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22385 conditions, 3787 events. 2429/3787 cut-off events. For 104098/104098 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 20284 event pairs, 1181 based on Foata normal form. 24/3806 useless extension candidates. Maximal degree in co-relation 22337. Up to 3293 conditions per place. [2024-06-28 03:21:07,446 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 112 selfloop transitions, 33 changer transitions 0/153 dead transitions. [2024-06-28 03:21:07,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 153 transitions, 1544 flow [2024-06-28 03:21:07,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:21:07,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:21:07,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 184 transitions. [2024-06-28 03:21:07,464 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4380952380952381 [2024-06-28 03:21:07,464 INFO L175 Difference]: Start difference. First operand has 106 places, 114 transitions, 1004 flow. Second operand 10 states and 184 transitions. [2024-06-28 03:21:07,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 153 transitions, 1544 flow [2024-06-28 03:21:07,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 153 transitions, 1513 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-28 03:21:07,523 INFO L231 Difference]: Finished difference. Result has 115 places, 117 transitions, 1097 flow [2024-06-28 03:21:07,523 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=974, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1097, PETRI_PLACES=115, PETRI_TRANSITIONS=117} [2024-06-28 03:21:07,523 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 72 predicate places. [2024-06-28 03:21:07,523 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 117 transitions, 1097 flow [2024-06-28 03:21:07,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:21:07,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:21:07,524 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:21:07,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-28 03:21:07,524 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:21:07,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:21:07,524 INFO L85 PathProgramCache]: Analyzing trace with hash 996486166, now seen corresponding path program 2 times [2024-06-28 03:21:07,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:21:07,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121917484] [2024-06-28 03:21:07,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:21:07,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:21:07,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:21:08,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:21:08,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:21:08,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121917484] [2024-06-28 03:21:08,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121917484] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:21:08,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:21:08,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:21:08,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701922209] [2024-06-28 03:21:08,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:21:08,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:21:08,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:21:08,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:21:08,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:21:08,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:21:08,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 117 transitions, 1097 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:21:08,627 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:21:08,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:21:08,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:21:09,352 INFO L124 PetriNetUnfolderBase]: 2601/4005 cut-off events. [2024-06-28 03:21:09,352 INFO L125 PetriNetUnfolderBase]: For 108236/108236 co-relation queries the response was YES. [2024-06-28 03:21:09,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23997 conditions, 4005 events. 2601/4005 cut-off events. For 108236/108236 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 20535 event pairs, 1367 based on Foata normal form. 4/4008 useless extension candidates. Maximal degree in co-relation 23946. Up to 3796 conditions per place. [2024-06-28 03:21:09,374 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 116 selfloop transitions, 22 changer transitions 0/143 dead transitions. [2024-06-28 03:21:09,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 143 transitions, 1477 flow [2024-06-28 03:21:09,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:21:09,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:21:09,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-28 03:21:09,376 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-28 03:21:09,376 INFO L175 Difference]: Start difference. First operand has 115 places, 117 transitions, 1097 flow. Second operand 8 states and 142 transitions. [2024-06-28 03:21:09,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 143 transitions, 1477 flow [2024-06-28 03:21:09,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 143 transitions, 1402 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-28 03:21:09,454 INFO L231 Difference]: Finished difference. Result has 116 places, 119 transitions, 1120 flow [2024-06-28 03:21:09,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1022, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1120, PETRI_PLACES=116, PETRI_TRANSITIONS=119} [2024-06-28 03:21:09,454 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 73 predicate places. [2024-06-28 03:21:09,454 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 119 transitions, 1120 flow [2024-06-28 03:21:09,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:21:09,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:21:09,455 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:21:09,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-28 03:21:09,455 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:21:09,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:21:09,455 INFO L85 PathProgramCache]: Analyzing trace with hash 66844720, now seen corresponding path program 3 times [2024-06-28 03:21:09,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:21:09,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983873367] [2024-06-28 03:21:09,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:21:09,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:21:09,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:21:10,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:21:10,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:21:10,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983873367] [2024-06-28 03:21:10,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983873367] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:21:10,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:21:10,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:21:10,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859299327] [2024-06-28 03:21:10,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:21:10,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:21:10,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:21:10,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:21:10,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:21:10,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:21:10,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 119 transitions, 1120 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:21:10,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:21:10,810 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:21:10,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:21:11,537 INFO L124 PetriNetUnfolderBase]: 2618/4032 cut-off events. [2024-06-28 03:21:11,537 INFO L125 PetriNetUnfolderBase]: For 113971/113971 co-relation queries the response was YES. [2024-06-28 03:21:11,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24297 conditions, 4032 events. 2618/4032 cut-off events. For 113971/113971 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 20717 event pairs, 1332 based on Foata normal form. 4/4035 useless extension candidates. Maximal degree in co-relation 24245. Up to 3819 conditions per place. [2024-06-28 03:21:11,570 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 122 selfloop transitions, 22 changer transitions 0/149 dead transitions. [2024-06-28 03:21:11,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 149 transitions, 1548 flow [2024-06-28 03:21:11,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:21:11,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:21:11,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-28 03:21:11,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-28 03:21:11,572 INFO L175 Difference]: Start difference. First operand has 116 places, 119 transitions, 1120 flow. Second operand 8 states and 144 transitions. [2024-06-28 03:21:11,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 149 transitions, 1548 flow [2024-06-28 03:21:11,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 149 transitions, 1470 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-28 03:21:11,670 INFO L231 Difference]: Finished difference. Result has 119 places, 124 transitions, 1181 flow [2024-06-28 03:21:11,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1042, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1181, PETRI_PLACES=119, PETRI_TRANSITIONS=124} [2024-06-28 03:21:11,670 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 76 predicate places. [2024-06-28 03:21:11,671 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 124 transitions, 1181 flow [2024-06-28 03:21:11,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:21:11,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:21:11,671 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:21:11,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-28 03:21:11,671 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:21:11,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:21:11,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1226174528, now seen corresponding path program 1 times [2024-06-28 03:21:11,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:21:11,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738375154] [2024-06-28 03:21:11,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:21:11,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:21:11,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:21:12,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:21:12,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:21:12,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738375154] [2024-06-28 03:21:12,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738375154] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:21:12,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:21:12,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:21:12,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948682570] [2024-06-28 03:21:12,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:21:12,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:21:12,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:21:12,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:21:12,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:21:12,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:21:12,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 124 transitions, 1181 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:21:12,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:21:12,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:21:12,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:21:13,744 INFO L124 PetriNetUnfolderBase]: 2620/4024 cut-off events. [2024-06-28 03:21:13,745 INFO L125 PetriNetUnfolderBase]: For 120587/120587 co-relation queries the response was YES. [2024-06-28 03:21:13,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24769 conditions, 4024 events. 2620/4024 cut-off events. For 120587/120587 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 20542 event pairs, 1343 based on Foata normal form. 2/4025 useless extension candidates. Maximal degree in co-relation 24715. Up to 3806 conditions per place. [2024-06-28 03:21:13,768 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 119 selfloop transitions, 27 changer transitions 0/151 dead transitions. [2024-06-28 03:21:13,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 151 transitions, 1563 flow [2024-06-28 03:21:13,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:21:13,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:21:13,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-28 03:21:13,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-28 03:21:13,770 INFO L175 Difference]: Start difference. First operand has 119 places, 124 transitions, 1181 flow. Second operand 9 states and 153 transitions. [2024-06-28 03:21:13,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 151 transitions, 1563 flow [2024-06-28 03:21:13,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 151 transitions, 1450 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-06-28 03:21:13,869 INFO L231 Difference]: Finished difference. Result has 123 places, 127 transitions, 1166 flow [2024-06-28 03:21:13,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1068, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1166, PETRI_PLACES=123, PETRI_TRANSITIONS=127} [2024-06-28 03:21:13,869 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 80 predicate places. [2024-06-28 03:21:13,869 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 127 transitions, 1166 flow [2024-06-28 03:21:13,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:21:13,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:21:13,870 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:21:13,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-28 03:21:13,870 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:21:13,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:21:13,870 INFO L85 PathProgramCache]: Analyzing trace with hash 73339840, now seen corresponding path program 4 times [2024-06-28 03:21:13,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:21:13,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498150621] [2024-06-28 03:21:13,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:21:13,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:21:13,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:21:14,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:21:14,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:21:14,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498150621] [2024-06-28 03:21:14,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498150621] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:21:14,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:21:14,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:21:14,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884759579] [2024-06-28 03:21:14,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:21:14,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:21:14,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:21:14,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:21:14,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:21:15,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:21:15,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 127 transitions, 1166 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:21:15,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:21:15,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:21:15,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:21:15,730 INFO L124 PetriNetUnfolderBase]: 2612/4012 cut-off events. [2024-06-28 03:21:15,730 INFO L125 PetriNetUnfolderBase]: For 126352/126352 co-relation queries the response was YES. [2024-06-28 03:21:15,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24761 conditions, 4012 events. 2612/4012 cut-off events. For 126352/126352 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 20404 event pairs, 1312 based on Foata normal form. 4/4015 useless extension candidates. Maximal degree in co-relation 24706. Up to 3812 conditions per place. [2024-06-28 03:21:15,758 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 130 selfloop transitions, 18 changer transitions 0/153 dead transitions. [2024-06-28 03:21:15,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 153 transitions, 1572 flow [2024-06-28 03:21:15,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:21:15,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:21:15,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-28 03:21:15,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-28 03:21:15,760 INFO L175 Difference]: Start difference. First operand has 123 places, 127 transitions, 1166 flow. Second operand 8 states and 141 transitions. [2024-06-28 03:21:15,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 153 transitions, 1572 flow [2024-06-28 03:21:15,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 153 transitions, 1513 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-28 03:21:15,853 INFO L231 Difference]: Finished difference. Result has 123 places, 129 transitions, 1204 flow [2024-06-28 03:21:15,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1107, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1204, PETRI_PLACES=123, PETRI_TRANSITIONS=129} [2024-06-28 03:21:15,854 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 80 predicate places. [2024-06-28 03:21:15,854 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 129 transitions, 1204 flow [2024-06-28 03:21:15,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:21:15,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:21:15,854 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:21:15,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-28 03:21:15,854 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)] === [2024-06-28 03:21:15,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:21:15,855 INFO L85 PathProgramCache]: Analyzing trace with hash -847686724, now seen corresponding path program 2 times [2024-06-28 03:21:15,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:21:15,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283687964] [2024-06-28 03:21:15,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:21:15,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:21:15,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:21:16,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:21:16,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:21:16,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283687964] [2024-06-28 03:21:16,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283687964] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:21:16,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:21:16,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 03:21:16,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46965537] [2024-06-28 03:21:16,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:21:16,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 03:21:16,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:21:16,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 03:21:16,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 03:21:16,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 03:21:16,519 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 129 transitions, 1204 flow. Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:21:16,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:21:16,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 03:21:16,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:21:17,033 INFO L124 PetriNetUnfolderBase]: 2455/3829 cut-off events. [2024-06-28 03:21:17,033 INFO L125 PetriNetUnfolderBase]: For 132819/132833 co-relation queries the response was YES. [2024-06-28 03:21:17,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23956 conditions, 3829 events. 2455/3829 cut-off events. For 132819/132833 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 20076 event pairs, 1304 based on Foata normal form. 6/3817 useless extension candidates. Maximal degree in co-relation 23900. Up to 3609 conditions per place. [2024-06-28 03:21:17,060 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 108 selfloop transitions, 12 changer transitions 0/137 dead transitions. [2024-06-28 03:21:17,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 137 transitions, 1464 flow [2024-06-28 03:21:17,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 03:21:17,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 03:21:17,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-28 03:21:17,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-28 03:21:17,062 INFO L175 Difference]: Start difference. First operand has 123 places, 129 transitions, 1204 flow. Second operand 6 states and 106 transitions. [2024-06-28 03:21:17,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 137 transitions, 1464 flow [2024-06-28 03:21:17,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 137 transitions, 1371 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-28 03:21:17,161 INFO L231 Difference]: Finished difference. Result has 123 places, 129 transitions, 1141 flow [2024-06-28 03:21:17,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1111, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1141, PETRI_PLACES=123, PETRI_TRANSITIONS=129} [2024-06-28 03:21:17,162 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 80 predicate places. [2024-06-28 03:21:17,163 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 129 transitions, 1141 flow [2024-06-28 03:21:17,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:21:17,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:21:17,163 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:21:17,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-28 03:21:17,163 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)] === [2024-06-28 03:21:17,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:21:17,164 INFO L85 PathProgramCache]: Analyzing trace with hash 1420116408, now seen corresponding path program 1 times [2024-06-28 03:21:17,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:21:17,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764645168] [2024-06-28 03:21:17,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:21:17,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:21:17,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:21:17,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:21:17,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:21:17,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764645168] [2024-06-28 03:21:17,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764645168] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:21:17,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:21:17,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:21:17,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222192354] [2024-06-28 03:21:17,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:21:17,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:21:17,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:21:17,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:21:17,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:21:17,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:21:17,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 129 transitions, 1141 flow. Second operand has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 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) [2024-06-28 03:21:17,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:21:17,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:21:17,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:21:18,531 INFO L124 PetriNetUnfolderBase]: 2611/4011 cut-off events. [2024-06-28 03:21:18,531 INFO L125 PetriNetUnfolderBase]: For 139780/139780 co-relation queries the response was YES. [2024-06-28 03:21:18,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25149 conditions, 4011 events. 2611/4011 cut-off events. For 139780/139780 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 20487 event pairs, 1350 based on Foata normal form. 1/4011 useless extension candidates. Maximal degree in co-relation 25092. Up to 3860 conditions per place. [2024-06-28 03:21:18,561 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 125 selfloop transitions, 17 changer transitions 0/147 dead transitions. [2024-06-28 03:21:18,561 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 147 transitions, 1567 flow [2024-06-28 03:21:18,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 03:21:18,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 03:21:18,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-28 03:21:18,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4246031746031746 [2024-06-28 03:21:18,562 INFO L175 Difference]: Start difference. First operand has 123 places, 129 transitions, 1141 flow. Second operand 6 states and 107 transitions. [2024-06-28 03:21:18,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 147 transitions, 1567 flow [2024-06-28 03:21:18,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 147 transitions, 1528 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-28 03:21:18,682 INFO L231 Difference]: Finished difference. Result has 124 places, 135 transitions, 1200 flow [2024-06-28 03:21:18,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1102, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1200, PETRI_PLACES=124, PETRI_TRANSITIONS=135} [2024-06-28 03:21:18,683 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 81 predicate places. [2024-06-28 03:21:18,683 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 135 transitions, 1200 flow [2024-06-28 03:21:18,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 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) [2024-06-28 03:21:18,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:21:18,684 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:21:18,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-28 03:21:18,684 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)] === [2024-06-28 03:21:18,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:21:18,684 INFO L85 PathProgramCache]: Analyzing trace with hash -389197282, now seen corresponding path program 2 times [2024-06-28 03:21:18,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:21:18,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705338141] [2024-06-28 03:21:18,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:21:18,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:21:18,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:21:19,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:21:19,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:21:19,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705338141] [2024-06-28 03:21:19,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705338141] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:21:19,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:21:19,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:21:19,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808694875] [2024-06-28 03:21:19,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:21:19,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:21:19,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:21:19,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:21:19,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:21:19,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:21:19,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 135 transitions, 1200 flow. Second operand has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 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) [2024-06-28 03:21:19,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:21:19,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:21:19,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:21:20,043 INFO L124 PetriNetUnfolderBase]: 2608/4008 cut-off events. [2024-06-28 03:21:20,044 INFO L125 PetriNetUnfolderBase]: For 148542/148544 co-relation queries the response was YES. [2024-06-28 03:21:20,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25767 conditions, 4008 events. 2608/4008 cut-off events. For 148542/148544 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 20464 event pairs, 1353 based on Foata normal form. 3/4010 useless extension candidates. Maximal degree in co-relation 25709. Up to 3857 conditions per place. [2024-06-28 03:21:20,072 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 121 selfloop transitions, 17 changer transitions 0/143 dead transitions. [2024-06-28 03:21:20,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 143 transitions, 1496 flow [2024-06-28 03:21:20,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 03:21:20,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 03:21:20,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 103 transitions. [2024-06-28 03:21:20,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4087301587301587 [2024-06-28 03:21:20,073 INFO L175 Difference]: Start difference. First operand has 124 places, 135 transitions, 1200 flow. Second operand 6 states and 103 transitions. [2024-06-28 03:21:20,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 143 transitions, 1496 flow [2024-06-28 03:21:20,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 143 transitions, 1449 flow, removed 19 selfloop flow, removed 2 redundant places. [2024-06-28 03:21:20,181 INFO L231 Difference]: Finished difference. Result has 128 places, 135 transitions, 1193 flow [2024-06-28 03:21:20,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1153, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1193, PETRI_PLACES=128, PETRI_TRANSITIONS=135} [2024-06-28 03:21:20,182 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 85 predicate places. [2024-06-28 03:21:20,182 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 135 transitions, 1193 flow [2024-06-28 03:21:20,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 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) [2024-06-28 03:21:20,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:21:20,182 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:21:20,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-28 03:21:20,182 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)] === [2024-06-28 03:21:20,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:21:20,183 INFO L85 PathProgramCache]: Analyzing trace with hash -847672836, now seen corresponding path program 1 times [2024-06-28 03:21:20,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:21:20,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421654783] [2024-06-28 03:21:20,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:21:20,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:21:20,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:21:20,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:21:20,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:21:20,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421654783] [2024-06-28 03:21:20,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421654783] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:21:20,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:21:20,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:21:20,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785219181] [2024-06-28 03:21:20,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:21:20,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:21:20,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:21:20,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:21:20,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:21:20,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:21:20,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 135 transitions, 1193 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:21:20,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:21:20,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:21:20,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:21:21,634 INFO L124 PetriNetUnfolderBase]: 2560/3932 cut-off events. [2024-06-28 03:21:21,635 INFO L125 PetriNetUnfolderBase]: For 154157/154171 co-relation queries the response was YES. [2024-06-28 03:21:21,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25166 conditions, 3932 events. 2560/3932 cut-off events. For 154157/154171 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 20143 event pairs, 1392 based on Foata normal form. 7/3921 useless extension candidates. Maximal degree in co-relation 25106. Up to 3821 conditions per place. [2024-06-28 03:21:21,664 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 119 selfloop transitions, 15 changer transitions 0/149 dead transitions. [2024-06-28 03:21:21,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 149 transitions, 1519 flow [2024-06-28 03:21:21,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:21:21,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:21:21,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-28 03:21:21,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3945578231292517 [2024-06-28 03:21:21,665 INFO L175 Difference]: Start difference. First operand has 128 places, 135 transitions, 1193 flow. Second operand 7 states and 116 transitions. [2024-06-28 03:21:21,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 149 transitions, 1519 flow [2024-06-28 03:21:21,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 149 transitions, 1473 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-28 03:21:21,759 INFO L231 Difference]: Finished difference. Result has 129 places, 138 transitions, 1221 flow [2024-06-28 03:21:21,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1147, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1221, PETRI_PLACES=129, PETRI_TRANSITIONS=138} [2024-06-28 03:21:21,760 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 86 predicate places. [2024-06-28 03:21:21,760 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 138 transitions, 1221 flow [2024-06-28 03:21:21,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:21:21,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:21:21,760 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:21:21,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-28 03:21:21,761 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:21:21,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:21:21,761 INFO L85 PathProgramCache]: Analyzing trace with hash 1830794486, now seen corresponding path program 1 times [2024-06-28 03:21:21,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:21:21,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547657904] [2024-06-28 03:21:21,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:21:21,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:21:21,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:21:22,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:21:22,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:21:22,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547657904] [2024-06-28 03:21:22,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547657904] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:21:22,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:21:22,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:21:22,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903918543] [2024-06-28 03:21:22,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:21:22,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:21:22,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:21:22,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:21:22,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:21:23,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:21:23,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 138 transitions, 1221 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:21:23,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:21:23,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:21:23,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:21:23,986 INFO L124 PetriNetUnfolderBase]: 2685/4115 cut-off events. [2024-06-28 03:21:23,986 INFO L125 PetriNetUnfolderBase]: For 162468/162472 co-relation queries the response was YES. [2024-06-28 03:21:24,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26972 conditions, 4115 events. 2685/4115 cut-off events. For 162468/162472 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 20812 event pairs, 846 based on Foata normal form. 8/4122 useless extension candidates. Maximal degree in co-relation 26912. Up to 3896 conditions per place. [2024-06-28 03:21:24,014 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 157 selfloop transitions, 30 changer transitions 0/192 dead transitions. [2024-06-28 03:21:24,014 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 192 transitions, 1881 flow [2024-06-28 03:21:24,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:21:24,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:21:24,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 180 transitions. [2024-06-28 03:21:24,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-28 03:21:24,015 INFO L175 Difference]: Start difference. First operand has 129 places, 138 transitions, 1221 flow. Second operand 10 states and 180 transitions. [2024-06-28 03:21:24,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 192 transitions, 1881 flow [2024-06-28 03:21:24,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 192 transitions, 1829 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-28 03:21:24,124 INFO L231 Difference]: Finished difference. Result has 138 places, 157 transitions, 1471 flow [2024-06-28 03:21:24,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1169, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1471, PETRI_PLACES=138, PETRI_TRANSITIONS=157} [2024-06-28 03:21:24,125 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 95 predicate places. [2024-06-28 03:21:24,125 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 157 transitions, 1471 flow [2024-06-28 03:21:24,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:21:24,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:21:24,125 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:21:24,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-28 03:21:24,126 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:21:24,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:21:24,126 INFO L85 PathProgramCache]: Analyzing trace with hash -1259434794, now seen corresponding path program 2 times [2024-06-28 03:21:24,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:21:24,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825234707] [2024-06-28 03:21:24,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:21:24,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:21:24,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:21:25,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:21:25,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:21:25,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825234707] [2024-06-28 03:21:25,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825234707] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:21:25,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:21:25,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:21:25,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928700316] [2024-06-28 03:21:25,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:21:25,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:21:25,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:21:25,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:21:25,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:21:25,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:21:25,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 157 transitions, 1471 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:21:25,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:21:25,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:21:25,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:21:26,331 INFO L124 PetriNetUnfolderBase]: 2819/4316 cut-off events. [2024-06-28 03:21:26,331 INFO L125 PetriNetUnfolderBase]: For 174127/174131 co-relation queries the response was YES. [2024-06-28 03:21:26,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29149 conditions, 4316 events. 2819/4316 cut-off events. For 174127/174131 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 22228 event pairs, 1149 based on Foata normal form. 8/4317 useless extension candidates. Maximal degree in co-relation 29084. Up to 3986 conditions per place. [2024-06-28 03:21:26,364 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 169 selfloop transitions, 60 changer transitions 0/234 dead transitions. [2024-06-28 03:21:26,364 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 234 transitions, 2477 flow [2024-06-28 03:21:26,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 03:21:26,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 03:21:26,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 214 transitions. [2024-06-28 03:21:26,365 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4246031746031746 [2024-06-28 03:21:26,366 INFO L175 Difference]: Start difference. First operand has 138 places, 157 transitions, 1471 flow. Second operand 12 states and 214 transitions. [2024-06-28 03:21:26,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 234 transitions, 2477 flow [2024-06-28 03:21:26,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 234 transitions, 2352 flow, removed 59 selfloop flow, removed 2 redundant places. [2024-06-28 03:21:26,549 INFO L231 Difference]: Finished difference. Result has 151 places, 188 transitions, 1918 flow [2024-06-28 03:21:26,549 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1408, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1918, PETRI_PLACES=151, PETRI_TRANSITIONS=188} [2024-06-28 03:21:26,549 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 108 predicate places. [2024-06-28 03:21:26,550 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 188 transitions, 1918 flow [2024-06-28 03:21:26,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:21:26,550 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:21:26,550 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:21:26,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-28 03:21:26,550 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:21:26,551 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:21:26,551 INFO L85 PathProgramCache]: Analyzing trace with hash 785964242, now seen corresponding path program 3 times [2024-06-28 03:21:26,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:21:26,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596220352] [2024-06-28 03:21:26,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:21:26,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:21:26,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:21:27,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:21:27,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:21:27,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596220352] [2024-06-28 03:21:27,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596220352] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:21:27,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:21:27,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:21:27,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197213969] [2024-06-28 03:21:27,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:21:27,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:21:27,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:21:27,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:21:27,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:21:27,822 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:21:27,823 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 188 transitions, 1918 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:21:27,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:21:27,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:21:27,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:21:28,874 INFO L124 PetriNetUnfolderBase]: 3036/4656 cut-off events. [2024-06-28 03:21:28,874 INFO L125 PetriNetUnfolderBase]: For 185798/185800 co-relation queries the response was YES. [2024-06-28 03:21:28,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31901 conditions, 4656 events. 3036/4656 cut-off events. For 185798/185800 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 24317 event pairs, 961 based on Foata normal form. 4/4655 useless extension candidates. Maximal degree in co-relation 31831. Up to 3961 conditions per place. [2024-06-28 03:21:28,914 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 157 selfloop transitions, 109 changer transitions 0/271 dead transitions. [2024-06-28 03:21:28,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 271 transitions, 3017 flow [2024-06-28 03:21:28,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:21:28,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:21:28,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-28 03:21:28,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-28 03:21:28,919 INFO L175 Difference]: Start difference. First operand has 151 places, 188 transitions, 1918 flow. Second operand 10 states and 190 transitions. [2024-06-28 03:21:28,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 271 transitions, 3017 flow [2024-06-28 03:21:29,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 271 transitions, 2855 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-28 03:21:29,128 INFO L231 Difference]: Finished difference. Result has 158 places, 223 transitions, 2406 flow [2024-06-28 03:21:29,128 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1760, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2406, PETRI_PLACES=158, PETRI_TRANSITIONS=223} [2024-06-28 03:21:29,129 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 115 predicate places. [2024-06-28 03:21:29,129 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 223 transitions, 2406 flow [2024-06-28 03:21:29,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:21:29,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:21:29,129 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:21:29,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-28 03:21:29,130 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:21:29,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:21:29,130 INFO L85 PathProgramCache]: Analyzing trace with hash -1835048548, now seen corresponding path program 4 times [2024-06-28 03:21:29,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:21:29,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539479706] [2024-06-28 03:21:29,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:21:29,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:21:29,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:21:30,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:21:30,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:21:30,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539479706] [2024-06-28 03:21:30,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539479706] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:21:30,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:21:30,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:21:30,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219460644] [2024-06-28 03:21:30,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:21:30,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:21:30,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:21:30,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:21:30,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:21:30,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:21:30,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 223 transitions, 2406 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:21:30,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:21:30,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:21:30,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:21:31,435 INFO L124 PetriNetUnfolderBase]: 3095/4749 cut-off events. [2024-06-28 03:21:31,436 INFO L125 PetriNetUnfolderBase]: For 203803/203805 co-relation queries the response was YES. [2024-06-28 03:21:31,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33910 conditions, 4749 events. 3095/4749 cut-off events. For 203803/203805 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 24945 event pairs, 954 based on Foata normal form. 4/4748 useless extension candidates. Maximal degree in co-relation 33836. Up to 3940 conditions per place. [2024-06-28 03:21:31,474 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 154 selfloop transitions, 120 changer transitions 0/279 dead transitions. [2024-06-28 03:21:31,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 279 transitions, 3476 flow [2024-06-28 03:21:31,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:21:31,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:21:31,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 192 transitions. [2024-06-28 03:21:31,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45714285714285713 [2024-06-28 03:21:31,475 INFO L175 Difference]: Start difference. First operand has 158 places, 223 transitions, 2406 flow. Second operand 10 states and 192 transitions. [2024-06-28 03:21:31,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 279 transitions, 3476 flow [2024-06-28 03:21:31,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 279 transitions, 3302 flow, removed 38 selfloop flow, removed 3 redundant places. [2024-06-28 03:21:31,639 INFO L231 Difference]: Finished difference. Result has 166 places, 229 transitions, 2650 flow [2024-06-28 03:21:31,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2240, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2650, PETRI_PLACES=166, PETRI_TRANSITIONS=229} [2024-06-28 03:21:31,640 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 123 predicate places. [2024-06-28 03:21:31,640 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 229 transitions, 2650 flow [2024-06-28 03:21:31,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:21:31,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:21:31,640 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:21:31,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-28 03:21:31,641 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:21:31,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:21:31,641 INFO L85 PathProgramCache]: Analyzing trace with hash 780601862, now seen corresponding path program 5 times [2024-06-28 03:21:31,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:21:31,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518179420] [2024-06-28 03:21:31,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:21:31,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:21:31,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:21:32,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:21:32,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:21:32,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518179420] [2024-06-28 03:21:32,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518179420] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:21:32,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:21:32,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:21:32,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457746116] [2024-06-28 03:21:32,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:21:32,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:21:32,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:21:32,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:21:32,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:21:32,864 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:21:32,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 229 transitions, 2650 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:21:32,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:21:32,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:21:32,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:21:33,989 INFO L124 PetriNetUnfolderBase]: 3087/4739 cut-off events. [2024-06-28 03:21:33,989 INFO L125 PetriNetUnfolderBase]: For 210311/210313 co-relation queries the response was YES. [2024-06-28 03:21:34,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33789 conditions, 4739 events. 3087/4739 cut-off events. For 210311/210313 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 24889 event pairs, 987 based on Foata normal form. 4/4738 useless extension candidates. Maximal degree in co-relation 33713. Up to 4042 conditions per place. [2024-06-28 03:21:34,033 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 166 selfloop transitions, 106 changer transitions 0/277 dead transitions. [2024-06-28 03:21:34,033 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 277 transitions, 3437 flow [2024-06-28 03:21:34,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:21:34,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:21:34,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 192 transitions. [2024-06-28 03:21:34,034 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45714285714285713 [2024-06-28 03:21:34,035 INFO L175 Difference]: Start difference. First operand has 166 places, 229 transitions, 2650 flow. Second operand 10 states and 192 transitions. [2024-06-28 03:21:34,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 277 transitions, 3437 flow [2024-06-28 03:21:34,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 277 transitions, 3205 flow, removed 53 selfloop flow, removed 6 redundant places. [2024-06-28 03:21:34,258 INFO L231 Difference]: Finished difference. Result has 171 places, 230 transitions, 2676 flow [2024-06-28 03:21:34,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2418, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2676, PETRI_PLACES=171, PETRI_TRANSITIONS=230} [2024-06-28 03:21:34,259 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 128 predicate places. [2024-06-28 03:21:34,259 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 230 transitions, 2676 flow [2024-06-28 03:21:34,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:21:34,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:21:34,259 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:21:34,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-28 03:21:34,259 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)] === [2024-06-28 03:21:34,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:21:34,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1564849200, now seen corresponding path program 1 times [2024-06-28 03:21:34,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:21:34,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205814336] [2024-06-28 03:21:34,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:21:34,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:21:34,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:21:34,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:21:34,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:21:34,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205814336] [2024-06-28 03:21:34,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205814336] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:21:34,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:21:34,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:21:34,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764428328] [2024-06-28 03:21:34,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:21:34,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:21:34,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:21:34,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:21:34,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:21:35,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:21:35,051 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 230 transitions, 2676 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:21:35,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:21:35,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:21:35,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:21:35,941 INFO L124 PetriNetUnfolderBase]: 3036/4653 cut-off events. [2024-06-28 03:21:35,941 INFO L125 PetriNetUnfolderBase]: For 219053/219107 co-relation queries the response was YES. [2024-06-28 03:21:35,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33782 conditions, 4653 events. 3036/4653 cut-off events. For 219053/219107 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 24429 event pairs, 1111 based on Foata normal form. 26/4649 useless extension candidates. Maximal degree in co-relation 33703. Up to 4418 conditions per place. [2024-06-28 03:21:35,999 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 198 selfloop transitions, 41 changer transitions 0/258 dead transitions. [2024-06-28 03:21:35,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 258 transitions, 3395 flow [2024-06-28 03:21:36,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:21:36,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:21:36,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-28 03:21:36,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-28 03:21:36,000 INFO L175 Difference]: Start difference. First operand has 171 places, 230 transitions, 2676 flow. Second operand 8 states and 142 transitions. [2024-06-28 03:21:36,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 258 transitions, 3395 flow [2024-06-28 03:21:36,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 258 transitions, 3207 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-28 03:21:36,212 INFO L231 Difference]: Finished difference. Result has 175 places, 239 transitions, 2690 flow [2024-06-28 03:21:36,212 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2488, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2690, PETRI_PLACES=175, PETRI_TRANSITIONS=239} [2024-06-28 03:21:36,213 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 132 predicate places. [2024-06-28 03:21:36,213 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 239 transitions, 2690 flow [2024-06-28 03:21:36,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:21:36,213 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:21:36,213 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:21:36,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-28 03:21:36,213 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:21:36,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:21:36,214 INFO L85 PathProgramCache]: Analyzing trace with hash 2070806362, now seen corresponding path program 6 times [2024-06-28 03:21:36,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:21:36,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876645609] [2024-06-28 03:21:36,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:21:36,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:21:36,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:21:37,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:21:37,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:21:37,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876645609] [2024-06-28 03:21:37,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876645609] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:21:37,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:21:37,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:21:37,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4919155] [2024-06-28 03:21:37,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:21:37,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:21:37,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:21:37,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:21:37,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:21:37,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:21:37,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 239 transitions, 2690 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:21:37,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:21:37,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:21:37,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:21:38,884 INFO L124 PetriNetUnfolderBase]: 3136/4786 cut-off events. [2024-06-28 03:21:38,885 INFO L125 PetriNetUnfolderBase]: For 229492/229494 co-relation queries the response was YES. [2024-06-28 03:21:38,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35042 conditions, 4786 events. 3136/4786 cut-off events. For 229492/229494 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 25002 event pairs, 1183 based on Foata normal form. 6/4781 useless extension candidates. Maximal degree in co-relation 34961. Up to 4403 conditions per place. [2024-06-28 03:21:38,926 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 207 selfloop transitions, 66 changer transitions 0/280 dead transitions. [2024-06-28 03:21:38,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 280 transitions, 3515 flow [2024-06-28 03:21:38,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:21:38,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:21:38,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-28 03:21:38,928 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-28 03:21:38,928 INFO L175 Difference]: Start difference. First operand has 175 places, 239 transitions, 2690 flow. Second operand 9 states and 163 transitions. [2024-06-28 03:21:38,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 280 transitions, 3515 flow [2024-06-28 03:21:39,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 280 transitions, 3453 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-28 03:21:39,145 INFO L231 Difference]: Finished difference. Result has 182 places, 246 transitions, 2936 flow [2024-06-28 03:21:39,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2628, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2936, PETRI_PLACES=182, PETRI_TRANSITIONS=246} [2024-06-28 03:21:39,146 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 139 predicate places. [2024-06-28 03:21:39,146 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 246 transitions, 2936 flow [2024-06-28 03:21:39,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:21:39,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:21:39,147 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:21:39,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-28 03:21:39,147 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:21:39,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:21:39,147 INFO L85 PathProgramCache]: Analyzing trace with hash 346319058, now seen corresponding path program 7 times [2024-06-28 03:21:39,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:21:39,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354120433] [2024-06-28 03:21:39,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:21:39,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:21:39,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:21:40,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:21:40,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:21:40,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354120433] [2024-06-28 03:21:40,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354120433] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:21:40,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:21:40,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:21:40,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524710962] [2024-06-28 03:21:40,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:21:40,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:21:40,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:21:40,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:21:40,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:21:40,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:21:40,572 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 246 transitions, 2936 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:21:40,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:21:40,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:21:40,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:21:41,423 INFO L124 PetriNetUnfolderBase]: 3189/4876 cut-off events. [2024-06-28 03:21:41,423 INFO L125 PetriNetUnfolderBase]: For 245127/245129 co-relation queries the response was YES. [2024-06-28 03:21:41,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36582 conditions, 4876 events. 3189/4876 cut-off events. For 245127/245129 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 25517 event pairs, 1002 based on Foata normal form. 4/4875 useless extension candidates. Maximal degree in co-relation 36498. Up to 4143 conditions per place. [2024-06-28 03:21:41,469 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 168 selfloop transitions, 117 changer transitions 0/292 dead transitions. [2024-06-28 03:21:41,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 292 transitions, 3828 flow [2024-06-28 03:21:41,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:21:41,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:21:41,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-28 03:21:41,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-28 03:21:41,471 INFO L175 Difference]: Start difference. First operand has 182 places, 246 transitions, 2936 flow. Second operand 9 states and 171 transitions. [2024-06-28 03:21:41,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 292 transitions, 3828 flow [2024-06-28 03:21:41,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 292 transitions, 3692 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-28 03:21:41,724 INFO L231 Difference]: Finished difference. Result has 187 places, 255 transitions, 3207 flow [2024-06-28 03:21:41,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2800, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3207, PETRI_PLACES=187, PETRI_TRANSITIONS=255} [2024-06-28 03:21:41,725 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 144 predicate places. [2024-06-28 03:21:41,725 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 255 transitions, 3207 flow [2024-06-28 03:21:41,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:21:41,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:21:41,726 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:21:41,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-28 03:21:41,726 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:21:41,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:21:41,726 INFO L85 PathProgramCache]: Analyzing trace with hash 226167384, now seen corresponding path program 8 times [2024-06-28 03:21:41,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:21:41,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214378154] [2024-06-28 03:21:41,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:21:41,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:21:41,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:21:42,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:21:42,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:21:42,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214378154] [2024-06-28 03:21:42,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214378154] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:21:42,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:21:42,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:21:42,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352084937] [2024-06-28 03:21:42,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:21:42,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:21:42,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:21:42,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:21:42,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:21:43,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:21:43,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 255 transitions, 3207 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:21:43,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:21:43,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:21:43,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:21:44,046 INFO L124 PetriNetUnfolderBase]: 3206/4898 cut-off events. [2024-06-28 03:21:44,046 INFO L125 PetriNetUnfolderBase]: For 260482/260484 co-relation queries the response was YES. [2024-06-28 03:21:44,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37743 conditions, 4898 events. 3206/4898 cut-off events. For 260482/260484 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 25619 event pairs, 1032 based on Foata normal form. 4/4897 useless extension candidates. Maximal degree in co-relation 37657. Up to 4170 conditions per place. [2024-06-28 03:21:44,090 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 167 selfloop transitions, 125 changer transitions 0/299 dead transitions. [2024-06-28 03:21:44,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 299 transitions, 4113 flow [2024-06-28 03:21:44,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:21:44,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:21:44,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-28 03:21:44,092 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-28 03:21:44,092 INFO L175 Difference]: Start difference. First operand has 187 places, 255 transitions, 3207 flow. Second operand 9 states and 169 transitions. [2024-06-28 03:21:44,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 299 transitions, 4113 flow [2024-06-28 03:21:44,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 299 transitions, 3801 flow, removed 39 selfloop flow, removed 7 redundant places. [2024-06-28 03:21:44,448 INFO L231 Difference]: Finished difference. Result has 189 places, 261 transitions, 3286 flow [2024-06-28 03:21:44,449 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2903, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3286, PETRI_PLACES=189, PETRI_TRANSITIONS=261} [2024-06-28 03:21:44,449 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 146 predicate places. [2024-06-28 03:21:44,449 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 261 transitions, 3286 flow [2024-06-28 03:21:44,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:21:44,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:21:44,450 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:21:44,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-28 03:21:44,450 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:21:44,450 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:21:44,450 INFO L85 PathProgramCache]: Analyzing trace with hash -2080061154, now seen corresponding path program 9 times [2024-06-28 03:21:44,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:21:44,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439846164] [2024-06-28 03:21:44,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:21:44,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:21:44,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:21:45,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:21:45,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:21:45,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439846164] [2024-06-28 03:21:45,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439846164] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:21:45,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:21:45,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:21:45,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271875987] [2024-06-28 03:21:45,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:21:45,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:21:45,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:21:45,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:21:45,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:21:45,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:21:45,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 261 transitions, 3286 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:21:45,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:21:45,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:21:45,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:21:46,851 INFO L124 PetriNetUnfolderBase]: 3223/4925 cut-off events. [2024-06-28 03:21:46,851 INFO L125 PetriNetUnfolderBase]: For 263094/263096 co-relation queries the response was YES. [2024-06-28 03:21:46,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38041 conditions, 4925 events. 3223/4925 cut-off events. For 263094/263096 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 25858 event pairs, 1006 based on Foata normal form. 4/4924 useless extension candidates. Maximal degree in co-relation 37955. Up to 4003 conditions per place. [2024-06-28 03:21:46,902 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 150 selfloop transitions, 143 changer transitions 0/300 dead transitions. [2024-06-28 03:21:46,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 300 transitions, 4137 flow [2024-06-28 03:21:46,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:21:46,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:21:46,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-28 03:21:46,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-28 03:21:46,904 INFO L175 Difference]: Start difference. First operand has 189 places, 261 transitions, 3286 flow. Second operand 9 states and 169 transitions. [2024-06-28 03:21:46,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 300 transitions, 4137 flow [2024-06-28 03:21:47,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 300 transitions, 3874 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-28 03:21:47,226 INFO L231 Difference]: Finished difference. Result has 193 places, 263 transitions, 3405 flow [2024-06-28 03:21:47,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3023, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3405, PETRI_PLACES=193, PETRI_TRANSITIONS=263} [2024-06-28 03:21:47,227 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 150 predicate places. [2024-06-28 03:21:47,227 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 263 transitions, 3405 flow [2024-06-28 03:21:47,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:21:47,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:21:47,228 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:21:47,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-28 03:21:47,228 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)] === [2024-06-28 03:21:47,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:21:47,228 INFO L85 PathProgramCache]: Analyzing trace with hash -862746212, now seen corresponding path program 2 times [2024-06-28 03:21:47,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:21:47,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814909814] [2024-06-28 03:21:47,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:21:47,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:21:47,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:21:48,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:21:48,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:21:48,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814909814] [2024-06-28 03:21:48,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814909814] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:21:48,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:21:48,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:21:48,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058488110] [2024-06-28 03:21:48,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:21:48,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:21:48,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:21:48,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:21:48,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:21:48,175 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:21:48,175 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 263 transitions, 3405 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:21:48,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:21:48,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:21:48,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:21:48,926 INFO L124 PetriNetUnfolderBase]: 3120/4776 cut-off events. [2024-06-28 03:21:48,926 INFO L125 PetriNetUnfolderBase]: For 278939/279007 co-relation queries the response was YES. [2024-06-28 03:21:48,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37609 conditions, 4776 events. 3120/4776 cut-off events. For 278939/279007 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 25156 event pairs, 1102 based on Foata normal form. 34/4764 useless extension candidates. Maximal degree in co-relation 37522. Up to 4538 conditions per place. [2024-06-28 03:21:48,963 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 219 selfloop transitions, 43 changer transitions 0/281 dead transitions. [2024-06-28 03:21:48,963 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 281 transitions, 4115 flow [2024-06-28 03:21:48,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:21:48,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:21:48,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-28 03:21:48,964 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42517006802721086 [2024-06-28 03:21:48,964 INFO L175 Difference]: Start difference. First operand has 193 places, 263 transitions, 3405 flow. Second operand 7 states and 125 transitions. [2024-06-28 03:21:48,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 281 transitions, 4115 flow [2024-06-28 03:21:49,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 281 transitions, 3752 flow, removed 40 selfloop flow, removed 8 redundant places. [2024-06-28 03:21:49,201 INFO L231 Difference]: Finished difference. Result has 192 places, 266 transitions, 3188 flow [2024-06-28 03:21:49,201 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3044, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3188, PETRI_PLACES=192, PETRI_TRANSITIONS=266} [2024-06-28 03:21:49,201 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 149 predicate places. [2024-06-28 03:21:49,202 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 266 transitions, 3188 flow [2024-06-28 03:21:49,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:21:49,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:21:49,202 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:21:49,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-28 03:21:49,203 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:21:49,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:21:49,203 INFO L85 PathProgramCache]: Analyzing trace with hash -643286754, now seen corresponding path program 10 times [2024-06-28 03:21:49,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:21:49,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086787975] [2024-06-28 03:21:49,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:21:49,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:21:49,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:21:50,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:21:50,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:21:50,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086787975] [2024-06-28 03:21:50,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086787975] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:21:50,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:21:50,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:21:50,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698424246] [2024-06-28 03:21:50,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:21:50,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:21:50,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:21:50,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:21:50,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:21:50,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:21:50,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 266 transitions, 3188 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:21:50,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:21:50,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:21:50,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:21:51,633 INFO L124 PetriNetUnfolderBase]: 3275/5012 cut-off events. [2024-06-28 03:21:51,633 INFO L125 PetriNetUnfolderBase]: For 278606/278606 co-relation queries the response was YES. [2024-06-28 03:21:51,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38735 conditions, 5012 events. 3275/5012 cut-off events. For 278606/278606 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 26498 event pairs, 1447 based on Foata normal form. 4/5011 useless extension candidates. Maximal degree in co-relation 38648. Up to 4668 conditions per place. [2024-06-28 03:21:51,687 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 258 selfloop transitions, 36 changer transitions 0/302 dead transitions. [2024-06-28 03:21:51,688 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 302 transitions, 4235 flow [2024-06-28 03:21:51,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:21:51,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:21:51,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 172 transitions. [2024-06-28 03:21:51,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4095238095238095 [2024-06-28 03:21:51,691 INFO L175 Difference]: Start difference. First operand has 192 places, 266 transitions, 3188 flow. Second operand 10 states and 172 transitions. [2024-06-28 03:21:51,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 302 transitions, 4235 flow [2024-06-28 03:21:51,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 302 transitions, 4138 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-28 03:21:51,983 INFO L231 Difference]: Finished difference. Result has 197 places, 270 transitions, 3348 flow [2024-06-28 03:21:51,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3093, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3348, PETRI_PLACES=197, PETRI_TRANSITIONS=270} [2024-06-28 03:21:51,984 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 154 predicate places. [2024-06-28 03:21:51,984 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 270 transitions, 3348 flow [2024-06-28 03:21:51,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:21:51,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:21:51,984 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:21:51,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-28 03:21:51,985 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:21:51,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:21:51,985 INFO L85 PathProgramCache]: Analyzing trace with hash 2072179734, now seen corresponding path program 11 times [2024-06-28 03:21:51,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:21:51,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779862610] [2024-06-28 03:21:51,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:21:51,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:21:51,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:21:53,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:21:53,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:21:53,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779862610] [2024-06-28 03:21:53,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779862610] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:21:53,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:21:53,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:21:53,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070266832] [2024-06-28 03:21:53,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:21:53,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:21:53,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:21:53,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:21:53,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:21:53,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:21:53,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 270 transitions, 3348 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:21:53,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:21:53,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:21:53,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:21:54,234 INFO L124 PetriNetUnfolderBase]: 3326/5087 cut-off events. [2024-06-28 03:21:54,234 INFO L125 PetriNetUnfolderBase]: For 284222/284222 co-relation queries the response was YES. [2024-06-28 03:21:54,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39565 conditions, 5087 events. 3326/5087 cut-off events. For 284222/284222 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 26984 event pairs, 1430 based on Foata normal form. 4/5086 useless extension candidates. Maximal degree in co-relation 39478. Up to 4717 conditions per place. [2024-06-28 03:21:54,283 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 257 selfloop transitions, 48 changer transitions 0/313 dead transitions. [2024-06-28 03:21:54,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 313 transitions, 4316 flow [2024-06-28 03:21:54,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:21:54,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:21:54,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-28 03:21:54,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-28 03:21:54,284 INFO L175 Difference]: Start difference. First operand has 197 places, 270 transitions, 3348 flow. Second operand 9 states and 163 transitions. [2024-06-28 03:21:54,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 313 transitions, 4316 flow [2024-06-28 03:21:54,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 313 transitions, 4176 flow, removed 52 selfloop flow, removed 6 redundant places. [2024-06-28 03:21:54,609 INFO L231 Difference]: Finished difference. Result has 201 places, 283 transitions, 3565 flow [2024-06-28 03:21:54,609 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3208, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3565, PETRI_PLACES=201, PETRI_TRANSITIONS=283} [2024-06-28 03:21:54,610 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 158 predicate places. [2024-06-28 03:21:54,610 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 283 transitions, 3565 flow [2024-06-28 03:21:54,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:21:54,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:21:54,610 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:21:54,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-28 03:21:54,611 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:21:54,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:21:54,612 INFO L85 PathProgramCache]: Analyzing trace with hash 2072187174, now seen corresponding path program 12 times [2024-06-28 03:21:54,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:21:54,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912668018] [2024-06-28 03:21:54,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:21:54,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:21:54,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:21:55,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:21:55,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:21:55,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912668018] [2024-06-28 03:21:55,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912668018] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:21:55,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:21:55,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:21:55,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102923626] [2024-06-28 03:21:55,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:21:55,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:21:55,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:21:55,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:21:55,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:21:55,924 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:21:55,925 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 283 transitions, 3565 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:21:55,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:21:55,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:21:55,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:21:56,979 INFO L124 PetriNetUnfolderBase]: 3368/5153 cut-off events. [2024-06-28 03:21:56,979 INFO L125 PetriNetUnfolderBase]: For 304278/304278 co-relation queries the response was YES. [2024-06-28 03:21:57,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41100 conditions, 5153 events. 3368/5153 cut-off events. For 304278/304278 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 27453 event pairs, 1440 based on Foata normal form. 4/5152 useless extension candidates. Maximal degree in co-relation 41010. Up to 4712 conditions per place. [2024-06-28 03:21:57,021 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 258 selfloop transitions, 53 changer transitions 0/319 dead transitions. [2024-06-28 03:21:57,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 319 transitions, 4663 flow [2024-06-28 03:21:57,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:21:57,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:21:57,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-28 03:21:57,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-28 03:21:57,022 INFO L175 Difference]: Start difference. First operand has 201 places, 283 transitions, 3565 flow. Second operand 9 states and 165 transitions. [2024-06-28 03:21:57,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 319 transitions, 4663 flow [2024-06-28 03:21:57,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 319 transitions, 4489 flow, removed 61 selfloop flow, removed 4 redundant places. [2024-06-28 03:21:57,352 INFO L231 Difference]: Finished difference. Result has 206 places, 287 transitions, 3696 flow [2024-06-28 03:21:57,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3391, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3696, PETRI_PLACES=206, PETRI_TRANSITIONS=287} [2024-06-28 03:21:57,353 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 163 predicate places. [2024-06-28 03:21:57,353 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 287 transitions, 3696 flow [2024-06-28 03:21:57,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:21:57,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:21:57,353 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:21:57,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-28 03:21:57,354 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:21:57,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:21:57,354 INFO L85 PathProgramCache]: Analyzing trace with hash 619640048, now seen corresponding path program 13 times [2024-06-28 03:21:57,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:21:57,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012599616] [2024-06-28 03:21:57,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:21:57,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:21:57,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:21:58,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:21:58,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:21:58,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012599616] [2024-06-28 03:21:58,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012599616] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:21:58,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:21:58,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:21:58,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839261999] [2024-06-28 03:21:58,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:21:58,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:21:58,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:21:58,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:21:58,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:21:58,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:21:58,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 287 transitions, 3696 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:21:58,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:21:58,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:21:58,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:21:59,622 INFO L124 PetriNetUnfolderBase]: 3360/5140 cut-off events. [2024-06-28 03:21:59,622 INFO L125 PetriNetUnfolderBase]: For 311217/311217 co-relation queries the response was YES. [2024-06-28 03:21:59,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40763 conditions, 5140 events. 3360/5140 cut-off events. For 311217/311217 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 27341 event pairs, 1424 based on Foata normal form. 4/5139 useless extension candidates. Maximal degree in co-relation 40672. Up to 4771 conditions per place. [2024-06-28 03:21:59,670 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 260 selfloop transitions, 49 changer transitions 0/317 dead transitions. [2024-06-28 03:21:59,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 317 transitions, 4445 flow [2024-06-28 03:21:59,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:21:59,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:21:59,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-28 03:21:59,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-28 03:21:59,672 INFO L175 Difference]: Start difference. First operand has 206 places, 287 transitions, 3696 flow. Second operand 9 states and 162 transitions. [2024-06-28 03:21:59,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 317 transitions, 4445 flow [2024-06-28 03:22:00,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 317 transitions, 4220 flow, removed 87 selfloop flow, removed 5 redundant places. [2024-06-28 03:22:00,121 INFO L231 Difference]: Finished difference. Result has 210 places, 287 transitions, 3577 flow [2024-06-28 03:22:00,122 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3471, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3577, PETRI_PLACES=210, PETRI_TRANSITIONS=287} [2024-06-28 03:22:00,122 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 167 predicate places. [2024-06-28 03:22:00,122 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 287 transitions, 3577 flow [2024-06-28 03:22:00,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:22:00,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:22:00,123 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:22:00,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-28 03:22:00,123 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:22:00,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:22:00,123 INFO L85 PathProgramCache]: Analyzing trace with hash -899794704, now seen corresponding path program 14 times [2024-06-28 03:22:00,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:22:00,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853346179] [2024-06-28 03:22:00,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:22:00,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:22:00,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:22:01,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:22:01,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:22:01,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853346179] [2024-06-28 03:22:01,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853346179] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:22:01,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:22:01,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:22:01,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269312267] [2024-06-28 03:22:01,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:22:01,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:22:01,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:22:01,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:22:01,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:22:01,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:22:01,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 287 transitions, 3577 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:22:01,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:22:01,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:22:01,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:22:02,424 INFO L124 PetriNetUnfolderBase]: 3377/5168 cut-off events. [2024-06-28 03:22:02,424 INFO L125 PetriNetUnfolderBase]: For 318748/318748 co-relation queries the response was YES. [2024-06-28 03:22:02,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40973 conditions, 5168 events. 3377/5168 cut-off events. For 318748/318748 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 27542 event pairs, 1457 based on Foata normal form. 4/5167 useless extension candidates. Maximal degree in co-relation 40880. Up to 4915 conditions per place. [2024-06-28 03:22:02,475 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 285 selfloop transitions, 25 changer transitions 0/318 dead transitions. [2024-06-28 03:22:02,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 318 transitions, 4391 flow [2024-06-28 03:22:02,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:22:02,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:22:02,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-28 03:22:02,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41798941798941797 [2024-06-28 03:22:02,476 INFO L175 Difference]: Start difference. First operand has 210 places, 287 transitions, 3577 flow. Second operand 9 states and 158 transitions. [2024-06-28 03:22:02,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 318 transitions, 4391 flow [2024-06-28 03:22:02,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 318 transitions, 4255 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-28 03:22:02,943 INFO L231 Difference]: Finished difference. Result has 210 places, 289 transitions, 3571 flow [2024-06-28 03:22:02,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3441, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3571, PETRI_PLACES=210, PETRI_TRANSITIONS=289} [2024-06-28 03:22:02,944 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 167 predicate places. [2024-06-28 03:22:02,944 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 289 transitions, 3571 flow [2024-06-28 03:22:02,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:22:02,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:22:02,945 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:22:02,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-28 03:22:02,945 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:22:02,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:22:02,945 INFO L85 PathProgramCache]: Analyzing trace with hash -643294194, now seen corresponding path program 15 times [2024-06-28 03:22:02,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:22:02,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560146671] [2024-06-28 03:22:02,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:22:02,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:22:02,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:22:04,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:22:04,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:22:04,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560146671] [2024-06-28 03:22:04,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560146671] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:22:04,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:22:04,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:22:04,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358993286] [2024-06-28 03:22:04,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:22:04,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:22:04,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:22:04,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:22:04,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:22:04,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:22:04,190 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 289 transitions, 3571 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:22:04,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:22:04,190 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:22:04,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:22:05,229 INFO L124 PetriNetUnfolderBase]: 3369/5156 cut-off events. [2024-06-28 03:22:05,229 INFO L125 PetriNetUnfolderBase]: For 326957/326957 co-relation queries the response was YES. [2024-06-28 03:22:05,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40764 conditions, 5156 events. 3369/5156 cut-off events. For 326957/326957 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 27440 event pairs, 1450 based on Foata normal form. 4/5155 useless extension candidates. Maximal degree in co-relation 40671. Up to 4858 conditions per place. [2024-06-28 03:22:05,282 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 277 selfloop transitions, 35 changer transitions 0/320 dead transitions. [2024-06-28 03:22:05,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 320 transitions, 4341 flow [2024-06-28 03:22:05,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:22:05,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:22:05,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-28 03:22:05,283 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-28 03:22:05,283 INFO L175 Difference]: Start difference. First operand has 210 places, 289 transitions, 3571 flow. Second operand 9 states and 159 transitions. [2024-06-28 03:22:05,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 320 transitions, 4341 flow [2024-06-28 03:22:05,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 320 transitions, 4188 flow, removed 59 selfloop flow, removed 5 redundant places. [2024-06-28 03:22:05,762 INFO L231 Difference]: Finished difference. Result has 214 places, 289 transitions, 3499 flow [2024-06-28 03:22:05,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3418, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3499, PETRI_PLACES=214, PETRI_TRANSITIONS=289} [2024-06-28 03:22:05,762 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 171 predicate places. [2024-06-28 03:22:05,762 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 289 transitions, 3499 flow [2024-06-28 03:22:05,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:22:05,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:22:05,763 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:22:05,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-28 03:22:05,763 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:22:05,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:22:05,763 INFO L85 PathProgramCache]: Analyzing trace with hash -634089984, now seen corresponding path program 16 times [2024-06-28 03:22:05,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:22:05,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090738140] [2024-06-28 03:22:05,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:22:05,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:22:05,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:22:06,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:22:06,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:22:06,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090738140] [2024-06-28 03:22:06,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090738140] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:22:06,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:22:06,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:22:06,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326772052] [2024-06-28 03:22:06,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:22:06,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:22:06,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:22:06,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:22:06,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:22:07,009 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:22:07,009 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 289 transitions, 3499 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:22:07,009 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:22:07,009 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:22:07,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:22:08,058 INFO L124 PetriNetUnfolderBase]: 3361/5144 cut-off events. [2024-06-28 03:22:08,059 INFO L125 PetriNetUnfolderBase]: For 332117/332117 co-relation queries the response was YES. [2024-06-28 03:22:08,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40459 conditions, 5144 events. 3361/5144 cut-off events. For 332117/332117 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 27307 event pairs, 1433 based on Foata normal form. 4/5143 useless extension candidates. Maximal degree in co-relation 40365. Up to 4900 conditions per place. [2024-06-28 03:22:08,106 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 292 selfloop transitions, 20 changer transitions 0/320 dead transitions. [2024-06-28 03:22:08,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 320 transitions, 4341 flow [2024-06-28 03:22:08,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:22:08,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:22:08,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-28 03:22:08,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-28 03:22:08,108 INFO L175 Difference]: Start difference. First operand has 214 places, 289 transitions, 3499 flow. Second operand 9 states and 157 transitions. [2024-06-28 03:22:08,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 320 transitions, 4341 flow [2024-06-28 03:22:08,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 320 transitions, 4260 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-28 03:22:08,624 INFO L231 Difference]: Finished difference. Result has 215 places, 291 transitions, 3567 flow [2024-06-28 03:22:08,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3418, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3567, PETRI_PLACES=215, PETRI_TRANSITIONS=291} [2024-06-28 03:22:08,625 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 172 predicate places. [2024-06-28 03:22:08,625 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 291 transitions, 3567 flow [2024-06-28 03:22:08,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:22:08,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:22:08,625 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:22:08,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-28 03:22:08,626 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)] === [2024-06-28 03:22:08,626 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:22:08,626 INFO L85 PathProgramCache]: Analyzing trace with hash 349023130, now seen corresponding path program 3 times [2024-06-28 03:22:08,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:22:08,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821120704] [2024-06-28 03:22:08,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:22:08,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:22:08,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:22:09,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:22:09,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:22:09,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821120704] [2024-06-28 03:22:09,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821120704] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:22:09,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:22:09,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:22:09,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440872863] [2024-06-28 03:22:09,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:22:09,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:22:09,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:22:09,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:22:09,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:22:09,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:22:09,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 291 transitions, 3567 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:22:09,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:22:09,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:22:09,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:22:10,261 INFO L124 PetriNetUnfolderBase]: 3218/4933 cut-off events. [2024-06-28 03:22:10,261 INFO L125 PetriNetUnfolderBase]: For 341135/341208 co-relation queries the response was YES. [2024-06-28 03:22:10,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39282 conditions, 4933 events. 3218/4933 cut-off events. For 341135/341208 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 26345 event pairs, 1434 based on Foata normal form. 33/4904 useless extension candidates. Maximal degree in co-relation 39187. Up to 4764 conditions per place. [2024-06-28 03:22:10,311 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 269 selfloop transitions, 15 changer transitions 0/303 dead transitions. [2024-06-28 03:22:10,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 303 transitions, 4216 flow [2024-06-28 03:22:10,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:22:10,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:22:10,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-28 03:22:10,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3877551020408163 [2024-06-28 03:22:10,313 INFO L175 Difference]: Start difference. First operand has 215 places, 291 transitions, 3567 flow. Second operand 7 states and 114 transitions. [2024-06-28 03:22:10,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 303 transitions, 4216 flow [2024-06-28 03:22:10,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 303 transitions, 4085 flow, removed 47 selfloop flow, removed 7 redundant places. [2024-06-28 03:22:10,793 INFO L231 Difference]: Finished difference. Result has 215 places, 294 transitions, 3529 flow [2024-06-28 03:22:10,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3436, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3529, PETRI_PLACES=215, PETRI_TRANSITIONS=294} [2024-06-28 03:22:10,794 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 172 predicate places. [2024-06-28 03:22:10,794 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 294 transitions, 3529 flow [2024-06-28 03:22:10,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:22:10,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:22:10,794 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:22:10,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-28 03:22:10,795 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)] === [2024-06-28 03:22:10,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:22:10,795 INFO L85 PathProgramCache]: Analyzing trace with hash 348607420, now seen corresponding path program 4 times [2024-06-28 03:22:10,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:22:10,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848974509] [2024-06-28 03:22:10,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:22:10,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:22:10,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:22:11,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:22:11,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:22:11,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848974509] [2024-06-28 03:22:11,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848974509] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:22:11,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:22:11,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:22:11,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909569278] [2024-06-28 03:22:11,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:22:11,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:22:11,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:22:11,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:22:11,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:22:11,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:22:11,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 294 transitions, 3529 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:22:11,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:22:11,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:22:11,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:22:12,666 INFO L124 PetriNetUnfolderBase]: 3214/4927 cut-off events. [2024-06-28 03:22:12,667 INFO L125 PetriNetUnfolderBase]: For 350562/350635 co-relation queries the response was YES. [2024-06-28 03:22:12,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39076 conditions, 4927 events. 3214/4927 cut-off events. For 350562/350635 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 26271 event pairs, 1433 based on Foata normal form. 32/4898 useless extension candidates. Maximal degree in co-relation 38980. Up to 4753 conditions per place. [2024-06-28 03:22:12,727 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 264 selfloop transitions, 20 changer transitions 0/303 dead transitions. [2024-06-28 03:22:12,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 303 transitions, 4127 flow [2024-06-28 03:22:12,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:22:12,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:22:12,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-28 03:22:12,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3945578231292517 [2024-06-28 03:22:12,730 INFO L175 Difference]: Start difference. First operand has 215 places, 294 transitions, 3529 flow. Second operand 7 states and 116 transitions. [2024-06-28 03:22:12,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 303 transitions, 4127 flow [2024-06-28 03:22:13,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 303 transitions, 4043 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-28 03:22:13,234 INFO L231 Difference]: Finished difference. Result has 217 places, 294 transitions, 3491 flow [2024-06-28 03:22:13,235 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3445, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3491, PETRI_PLACES=217, PETRI_TRANSITIONS=294} [2024-06-28 03:22:13,235 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 174 predicate places. [2024-06-28 03:22:13,235 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 294 transitions, 3491 flow [2024-06-28 03:22:13,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:22:13,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:22:13,236 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:22:13,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-28 03:22:13,236 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)] === [2024-06-28 03:22:13,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:22:13,237 INFO L85 PathProgramCache]: Analyzing trace with hash 1073817028, now seen corresponding path program 1 times [2024-06-28 03:22:13,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:22:13,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181707570] [2024-06-28 03:22:13,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:22:13,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:22:13,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:22:14,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:22:14,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:22:14,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181707570] [2024-06-28 03:22:14,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181707570] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:22:14,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:22:14,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:22:14,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543377271] [2024-06-28 03:22:14,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:22:14,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:22:14,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:22:14,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:22:14,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:22:14,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:22:14,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 294 transitions, 3491 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:22:14,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:22:14,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:22:14,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:22:15,208 INFO L124 PetriNetUnfolderBase]: 3375/5164 cut-off events. [2024-06-28 03:22:15,209 INFO L125 PetriNetUnfolderBase]: For 350129/350129 co-relation queries the response was YES. [2024-06-28 03:22:15,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40684 conditions, 5164 events. 3375/5164 cut-off events. For 350129/350129 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 27477 event pairs, 1462 based on Foata normal form. 2/5161 useless extension candidates. Maximal degree in co-relation 40587. Up to 4974 conditions per place. [2024-06-28 03:22:15,256 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 287 selfloop transitions, 17 changer transitions 0/313 dead transitions. [2024-06-28 03:22:15,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 313 transitions, 4205 flow [2024-06-28 03:22:15,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:22:15,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:22:15,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-28 03:22:15,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41496598639455784 [2024-06-28 03:22:15,257 INFO L175 Difference]: Start difference. First operand has 217 places, 294 transitions, 3491 flow. Second operand 7 states and 122 transitions. [2024-06-28 03:22:15,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 313 transitions, 4205 flow [2024-06-28 03:22:15,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 313 transitions, 4097 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-28 03:22:15,649 INFO L231 Difference]: Finished difference. Result has 218 places, 297 transitions, 3470 flow [2024-06-28 03:22:15,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3383, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3470, PETRI_PLACES=218, PETRI_TRANSITIONS=297} [2024-06-28 03:22:15,649 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 175 predicate places. [2024-06-28 03:22:15,649 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 297 transitions, 3470 flow [2024-06-28 03:22:15,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:22:15,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:22:15,650 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:22:15,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-28 03:22:15,650 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)] === [2024-06-28 03:22:15,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:22:15,650 INFO L85 PathProgramCache]: Analyzing trace with hash 1073937184, now seen corresponding path program 1 times [2024-06-28 03:22:15,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:22:15,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067152645] [2024-06-28 03:22:15,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:22:15,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:22:15,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:22:16,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:22:16,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:22:16,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067152645] [2024-06-28 03:22:16,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067152645] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:22:16,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:22:16,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:22:16,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504940421] [2024-06-28 03:22:16,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:22:16,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:22:16,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:22:16,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:22:16,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:22:16,395 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:22:16,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 297 transitions, 3470 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:22:16,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:22:16,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:22:16,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:22:17,509 INFO L124 PetriNetUnfolderBase]: 3502/5301 cut-off events. [2024-06-28 03:22:17,509 INFO L125 PetriNetUnfolderBase]: For 323539/323539 co-relation queries the response was YES. [2024-06-28 03:22:17,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40835 conditions, 5301 events. 3502/5301 cut-off events. For 323539/323539 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 27693 event pairs, 1537 based on Foata normal form. 1/5301 useless extension candidates. Maximal degree in co-relation 40737. Up to 5223 conditions per place. [2024-06-28 03:22:17,554 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 289 selfloop transitions, 24 changer transitions 0/316 dead transitions. [2024-06-28 03:22:17,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 316 transitions, 4314 flow [2024-06-28 03:22:17,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:22:17,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:22:17,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-28 03:22:17,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3945578231292517 [2024-06-28 03:22:17,555 INFO L175 Difference]: Start difference. First operand has 218 places, 297 transitions, 3470 flow. Second operand 7 states and 116 transitions. [2024-06-28 03:22:17,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 316 transitions, 4314 flow [2024-06-28 03:22:18,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 316 transitions, 4236 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-28 03:22:18,018 INFO L231 Difference]: Finished difference. Result has 219 places, 303 transitions, 3528 flow [2024-06-28 03:22:18,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3392, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3528, PETRI_PLACES=219, PETRI_TRANSITIONS=303} [2024-06-28 03:22:18,019 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 176 predicate places. [2024-06-28 03:22:18,019 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 303 transitions, 3528 flow [2024-06-28 03:22:18,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:22:18,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:22:18,019 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:22:18,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-28 03:22:18,019 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)] === [2024-06-28 03:22:18,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:22:18,020 INFO L85 PathProgramCache]: Analyzing trace with hash -685430366, now seen corresponding path program 2 times [2024-06-28 03:22:18,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:22:18,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160012770] [2024-06-28 03:22:18,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:22:18,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:22:18,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:22:18,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:22:18,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:22:18,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160012770] [2024-06-28 03:22:18,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160012770] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:22:18,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:22:18,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:22:18,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720871087] [2024-06-28 03:22:18,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:22:18,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:22:18,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:22:18,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:22:18,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:22:18,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:22:18,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 303 transitions, 3528 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:22:18,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:22:18,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:22:18,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:22:20,072 INFO L124 PetriNetUnfolderBase]: 3402/5205 cut-off events. [2024-06-28 03:22:20,073 INFO L125 PetriNetUnfolderBase]: For 339879/339879 co-relation queries the response was YES. [2024-06-28 03:22:20,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40907 conditions, 5205 events. 3402/5205 cut-off events. For 339879/339879 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 27673 event pairs, 1453 based on Foata normal form. 2/5206 useless extension candidates. Maximal degree in co-relation 40809. Up to 4981 conditions per place. [2024-06-28 03:22:20,117 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 285 selfloop transitions, 29 changer transitions 0/325 dead transitions. [2024-06-28 03:22:20,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 325 transitions, 4408 flow [2024-06-28 03:22:20,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:22:20,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:22:20,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-28 03:22:20,118 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42517006802721086 [2024-06-28 03:22:20,118 INFO L175 Difference]: Start difference. First operand has 219 places, 303 transitions, 3528 flow. Second operand 7 states and 125 transitions. [2024-06-28 03:22:20,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 325 transitions, 4408 flow [2024-06-28 03:22:20,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 325 transitions, 4349 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-28 03:22:20,524 INFO L231 Difference]: Finished difference. Result has 223 places, 309 transitions, 3635 flow [2024-06-28 03:22:20,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3469, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3635, PETRI_PLACES=223, PETRI_TRANSITIONS=309} [2024-06-28 03:22:20,525 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 180 predicate places. [2024-06-28 03:22:20,525 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 309 transitions, 3635 flow [2024-06-28 03:22:20,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:22:20,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:22:20,526 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:22:20,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-28 03:22:20,526 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)] === [2024-06-28 03:22:20,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:22:20,526 INFO L85 PathProgramCache]: Analyzing trace with hash 819787456, now seen corresponding path program 3 times [2024-06-28 03:22:20,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:22:20,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915264253] [2024-06-28 03:22:20,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:22:20,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:22:20,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:22:21,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:22:21,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:22:21,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915264253] [2024-06-28 03:22:21,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915264253] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:22:21,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:22:21,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:22:21,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319994745] [2024-06-28 03:22:21,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:22:21,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:22:21,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:22:21,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:22:21,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:22:21,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:22:21,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 309 transitions, 3635 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:22:21,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:22:21,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:22:21,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:22:22,467 INFO L124 PetriNetUnfolderBase]: 3396/5198 cut-off events. [2024-06-28 03:22:22,468 INFO L125 PetriNetUnfolderBase]: For 352002/352004 co-relation queries the response was YES. [2024-06-28 03:22:22,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41402 conditions, 5198 events. 3396/5198 cut-off events. For 352002/352004 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 27589 event pairs, 1478 based on Foata normal form. 2/5199 useless extension candidates. Maximal degree in co-relation 41302. Up to 4976 conditions per place. [2024-06-28 03:22:22,526 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 280 selfloop transitions, 29 changer transitions 0/320 dead transitions. [2024-06-28 03:22:22,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 320 transitions, 4291 flow [2024-06-28 03:22:22,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:22:22,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:22:22,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-28 03:22:22,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41156462585034015 [2024-06-28 03:22:22,528 INFO L175 Difference]: Start difference. First operand has 223 places, 309 transitions, 3635 flow. Second operand 7 states and 121 transitions. [2024-06-28 03:22:22,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 320 transitions, 4291 flow [2024-06-28 03:22:23,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 320 transitions, 4205 flow, removed 34 selfloop flow, removed 3 redundant places. [2024-06-28 03:22:23,073 INFO L231 Difference]: Finished difference. Result has 227 places, 309 transitions, 3613 flow [2024-06-28 03:22:23,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3549, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3613, PETRI_PLACES=227, PETRI_TRANSITIONS=309} [2024-06-28 03:22:23,073 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 184 predicate places. [2024-06-28 03:22:23,073 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 309 transitions, 3613 flow [2024-06-28 03:22:23,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:22:23,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:22:23,074 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:22:23,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-28 03:22:23,074 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)] === [2024-06-28 03:22:23,074 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:22:23,075 INFO L85 PathProgramCache]: Analyzing trace with hash -508061510, now seen corresponding path program 2 times [2024-06-28 03:22:23,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:22:23,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207190612] [2024-06-28 03:22:23,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:22:23,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:22:23,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:22:23,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:22:23,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:22:23,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207190612] [2024-06-28 03:22:23,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207190612] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:22:23,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:22:23,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:22:23,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246641259] [2024-06-28 03:22:23,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:22:23,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:22:23,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:22:23,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:22:23,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:22:23,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:22:23,932 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 309 transitions, 3613 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:22:23,932 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:22:23,932 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:22:23,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:22:25,036 INFO L124 PetriNetUnfolderBase]: 3511/5315 cut-off events. [2024-06-28 03:22:25,036 INFO L125 PetriNetUnfolderBase]: For 361413/361415 co-relation queries the response was YES. [2024-06-28 03:22:25,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42245 conditions, 5315 events. 3511/5315 cut-off events. For 361413/361415 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 27775 event pairs, 1538 based on Foata normal form. 3/5317 useless extension candidates. Maximal degree in co-relation 42143. Up to 5235 conditions per place. [2024-06-28 03:22:25,099 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 291 selfloop transitions, 28 changer transitions 0/322 dead transitions. [2024-06-28 03:22:25,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 322 transitions, 4415 flow [2024-06-28 03:22:25,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:22:25,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:22:25,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-28 03:22:25,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-28 03:22:25,100 INFO L175 Difference]: Start difference. First operand has 227 places, 309 transitions, 3613 flow. Second operand 7 states and 112 transitions. [2024-06-28 03:22:25,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 322 transitions, 4415 flow [2024-06-28 03:22:25,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 322 transitions, 4331 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-28 03:22:25,662 INFO L231 Difference]: Finished difference. Result has 228 places, 312 transitions, 3623 flow [2024-06-28 03:22:25,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3529, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3623, PETRI_PLACES=228, PETRI_TRANSITIONS=312} [2024-06-28 03:22:25,663 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 185 predicate places. [2024-06-28 03:22:25,663 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 312 transitions, 3623 flow [2024-06-28 03:22:25,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:22:25,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:22:25,664 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:22:25,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-28 03:22:25,664 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)] === [2024-06-28 03:22:25,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:22:25,665 INFO L85 PathProgramCache]: Analyzing trace with hash 348791932, now seen corresponding path program 3 times [2024-06-28 03:22:25,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:22:25,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726589846] [2024-06-28 03:22:25,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:22:25,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:22:25,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:22:26,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:22:26,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:22:26,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726589846] [2024-06-28 03:22:26,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726589846] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:22:26,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:22:26,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:22:26,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721419452] [2024-06-28 03:22:26,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:22:26,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:22:26,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:22:26,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:22:26,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:22:26,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:22:26,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 312 transitions, 3623 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:22:26,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:22:26,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:22:26,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:22:27,636 INFO L124 PetriNetUnfolderBase]: 3508/5311 cut-off events. [2024-06-28 03:22:27,636 INFO L125 PetriNetUnfolderBase]: For 372259/372261 co-relation queries the response was YES. [2024-06-28 03:22:27,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42377 conditions, 5311 events. 3508/5311 cut-off events. For 372259/372261 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 27757 event pairs, 1523 based on Foata normal form. 3/5313 useless extension candidates. Maximal degree in co-relation 42274. Up to 5232 conditions per place. [2024-06-28 03:22:27,691 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 291 selfloop transitions, 27 changer transitions 0/321 dead transitions. [2024-06-28 03:22:27,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 321 transitions, 4289 flow [2024-06-28 03:22:27,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:22:27,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:22:27,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-28 03:22:27,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-28 03:22:27,693 INFO L175 Difference]: Start difference. First operand has 228 places, 312 transitions, 3623 flow. Second operand 7 states and 112 transitions. [2024-06-28 03:22:27,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 321 transitions, 4289 flow [2024-06-28 03:22:28,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 321 transitions, 4209 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-28 03:22:28,162 INFO L231 Difference]: Finished difference. Result has 231 places, 312 transitions, 3603 flow [2024-06-28 03:22:28,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3543, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3603, PETRI_PLACES=231, PETRI_TRANSITIONS=312} [2024-06-28 03:22:28,162 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 188 predicate places. [2024-06-28 03:22:28,163 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 312 transitions, 3603 flow [2024-06-28 03:22:28,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:22:28,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:22:28,163 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:22:28,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-28 03:22:28,163 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)] === [2024-06-28 03:22:28,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:22:28,164 INFO L85 PathProgramCache]: Analyzing trace with hash 1136018441, now seen corresponding path program 1 times [2024-06-28 03:22:28,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:22:28,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383475098] [2024-06-28 03:22:28,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:22:28,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:22:28,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:22:28,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:22:28,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:22:28,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383475098] [2024-06-28 03:22:28,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383475098] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:22:28,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:22:28,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:22:28,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819312437] [2024-06-28 03:22:28,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:22:28,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:22:28,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:22:28,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:22:28,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:22:28,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:22:28,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 312 transitions, 3603 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:22:28,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:22:28,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:22:28,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:22:29,903 INFO L124 PetriNetUnfolderBase]: 3425/5233 cut-off events. [2024-06-28 03:22:29,904 INFO L125 PetriNetUnfolderBase]: For 388378/388382 co-relation queries the response was YES. [2024-06-28 03:22:29,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42320 conditions, 5233 events. 3425/5233 cut-off events. For 388378/388382 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 27743 event pairs, 1264 based on Foata normal form. 3/5230 useless extension candidates. Maximal degree in co-relation 42216. Up to 4940 conditions per place. [2024-06-28 03:22:29,960 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 296 selfloop transitions, 49 changer transitions 0/357 dead transitions. [2024-06-28 03:22:29,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 357 transitions, 4692 flow [2024-06-28 03:22:29,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:22:29,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:22:29,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-28 03:22:29,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-28 03:22:29,961 INFO L175 Difference]: Start difference. First operand has 231 places, 312 transitions, 3603 flow. Second operand 8 states and 150 transitions. [2024-06-28 03:22:29,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 357 transitions, 4692 flow [2024-06-28 03:22:30,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 357 transitions, 4616 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-28 03:22:30,447 INFO L231 Difference]: Finished difference. Result has 235 places, 332 transitions, 3895 flow [2024-06-28 03:22:30,447 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3527, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3895, PETRI_PLACES=235, PETRI_TRANSITIONS=332} [2024-06-28 03:22:30,447 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 192 predicate places. [2024-06-28 03:22:30,447 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 332 transitions, 3895 flow [2024-06-28 03:22:30,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:22:30,448 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:22:30,448 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:22:30,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-28 03:22:30,448 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:22:30,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:22:30,448 INFO L85 PathProgramCache]: Analyzing trace with hash -433559807, now seen corresponding path program 1 times [2024-06-28 03:22:30,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:22:30,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050976357] [2024-06-28 03:22:30,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:22:30,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:22:30,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:22:31,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:22:31,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:22:31,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050976357] [2024-06-28 03:22:31,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050976357] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:22:31,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:22:31,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-28 03:22:31,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255488906] [2024-06-28 03:22:31,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:22:31,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-28 03:22:31,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:22:31,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-28 03:22:31,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-28 03:22:31,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:22:31,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 332 transitions, 3895 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:22:31,843 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:22:31,843 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:22:31,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:22:33,218 INFO L124 PetriNetUnfolderBase]: 3461/5299 cut-off events. [2024-06-28 03:22:33,218 INFO L125 PetriNetUnfolderBase]: For 416944/416946 co-relation queries the response was YES. [2024-06-28 03:22:33,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43803 conditions, 5299 events. 3461/5299 cut-off events. For 416944/416946 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 28199 event pairs, 1192 based on Foata normal form. 14/5312 useless extension candidates. Maximal degree in co-relation 43695. Up to 4861 conditions per place. [2024-06-28 03:22:33,279 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 307 selfloop transitions, 66 changer transitions 0/385 dead transitions. [2024-06-28 03:22:33,279 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 385 transitions, 4937 flow [2024-06-28 03:22:33,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-28 03:22:33,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-28 03:22:33,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 231 transitions. [2024-06-28 03:22:33,280 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4230769230769231 [2024-06-28 03:22:33,280 INFO L175 Difference]: Start difference. First operand has 235 places, 332 transitions, 3895 flow. Second operand 13 states and 231 transitions. [2024-06-28 03:22:33,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 385 transitions, 4937 flow [2024-06-28 03:22:33,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 385 transitions, 4880 flow, removed 24 selfloop flow, removed 2 redundant places. [2024-06-28 03:22:33,828 INFO L231 Difference]: Finished difference. Result has 246 places, 333 transitions, 4037 flow [2024-06-28 03:22:33,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3838, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4037, PETRI_PLACES=246, PETRI_TRANSITIONS=333} [2024-06-28 03:22:33,829 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 203 predicate places. [2024-06-28 03:22:33,829 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 333 transitions, 4037 flow [2024-06-28 03:22:33,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:22:33,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:22:33,829 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:22:33,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-28 03:22:33,829 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:22:33,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:22:33,830 INFO L85 PathProgramCache]: Analyzing trace with hash -696809843, now seen corresponding path program 2 times [2024-06-28 03:22:33,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:22:33,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834524279] [2024-06-28 03:22:33,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:22:33,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:22:33,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:22:35,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:22:35,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:22:35,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834524279] [2024-06-28 03:22:35,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834524279] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:22:35,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:22:35,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-28 03:22:35,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671284409] [2024-06-28 03:22:35,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:22:35,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-28 03:22:35,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:22:35,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-28 03:22:35,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-28 03:22:35,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:22:35,304 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 333 transitions, 4037 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:22:35,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:22:35,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:22:35,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:22:36,780 INFO L124 PetriNetUnfolderBase]: 3529/5411 cut-off events. [2024-06-28 03:22:36,780 INFO L125 PetriNetUnfolderBase]: For 441126/441128 co-relation queries the response was YES. [2024-06-28 03:22:36,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45365 conditions, 5411 events. 3529/5411 cut-off events. For 441126/441128 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 29028 event pairs, 1125 based on Foata normal form. 14/5424 useless extension candidates. Maximal degree in co-relation 45255. Up to 5007 conditions per place. [2024-06-28 03:22:36,845 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 313 selfloop transitions, 50 changer transitions 0/375 dead transitions. [2024-06-28 03:22:36,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 375 transitions, 5047 flow [2024-06-28 03:22:36,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 03:22:36,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 03:22:36,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 197 transitions. [2024-06-28 03:22:36,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4264069264069264 [2024-06-28 03:22:36,846 INFO L175 Difference]: Start difference. First operand has 246 places, 333 transitions, 4037 flow. Second operand 11 states and 197 transitions. [2024-06-28 03:22:36,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 375 transitions, 5047 flow [2024-06-28 03:22:37,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 375 transitions, 4815 flow, removed 50 selfloop flow, removed 11 redundant places. [2024-06-28 03:22:37,485 INFO L231 Difference]: Finished difference. Result has 246 places, 335 transitions, 4040 flow [2024-06-28 03:22:37,485 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3858, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4040, PETRI_PLACES=246, PETRI_TRANSITIONS=335} [2024-06-28 03:22:37,486 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 203 predicate places. [2024-06-28 03:22:37,486 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 335 transitions, 4040 flow [2024-06-28 03:22:37,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:22:37,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:22:37,486 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:22:37,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-28 03:22:37,486 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)] === [2024-06-28 03:22:37,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:22:37,487 INFO L85 PathProgramCache]: Analyzing trace with hash 2037753307, now seen corresponding path program 1 times [2024-06-28 03:22:37,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:22:37,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166377374] [2024-06-28 03:22:37,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:22:37,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:22:37,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:22:38,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:22:38,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:22:38,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166377374] [2024-06-28 03:22:38,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166377374] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:22:38,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:22:38,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:22:38,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383777364] [2024-06-28 03:22:38,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:22:38,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:22:38,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:22:38,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:22:38,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:22:38,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:22:38,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 335 transitions, 4040 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:22:38,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:22:38,272 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:22:38,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:22:39,568 INFO L124 PetriNetUnfolderBase]: 3550/5442 cut-off events. [2024-06-28 03:22:39,569 INFO L125 PetriNetUnfolderBase]: For 439362/439366 co-relation queries the response was YES. [2024-06-28 03:22:39,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45337 conditions, 5442 events. 3550/5442 cut-off events. For 439362/439366 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 29283 event pairs, 1288 based on Foata normal form. 5/5446 useless extension candidates. Maximal degree in co-relation 45226. Up to 5177 conditions per place. [2024-06-28 03:22:39,627 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 316 selfloop transitions, 49 changer transitions 0/377 dead transitions. [2024-06-28 03:22:39,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 377 transitions, 5430 flow [2024-06-28 03:22:39,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:22:39,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:22:39,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-28 03:22:39,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-28 03:22:39,628 INFO L175 Difference]: Start difference. First operand has 246 places, 335 transitions, 4040 flow. Second operand 8 states and 150 transitions. [2024-06-28 03:22:39,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 377 transitions, 5430 flow [2024-06-28 03:22:40,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 377 transitions, 5284 flow, removed 25 selfloop flow, removed 9 redundant places. [2024-06-28 03:22:40,269 INFO L231 Difference]: Finished difference. Result has 246 places, 353 transitions, 4264 flow [2024-06-28 03:22:40,269 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3894, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4264, PETRI_PLACES=246, PETRI_TRANSITIONS=353} [2024-06-28 03:22:40,270 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 203 predicate places. [2024-06-28 03:22:40,270 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 353 transitions, 4264 flow [2024-06-28 03:22:40,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:22:40,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:22:40,270 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:22:40,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-28 03:22:40,271 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:22:40,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:22:40,271 INFO L85 PathProgramCache]: Analyzing trace with hash -350066397, now seen corresponding path program 3 times [2024-06-28 03:22:40,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:22:40,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523250360] [2024-06-28 03:22:40,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:22:40,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:22:40,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:22:41,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:22:41,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:22:41,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523250360] [2024-06-28 03:22:41,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523250360] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:22:41,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:22:41,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-28 03:22:41,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562655875] [2024-06-28 03:22:41,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:22:41,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-28 03:22:41,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:22:41,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-28 03:22:41,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-28 03:22:41,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:22:41,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 353 transitions, 4264 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:22:41,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:22:41,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:22:41,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:22:43,262 INFO L124 PetriNetUnfolderBase]: 3605/5555 cut-off events. [2024-06-28 03:22:43,262 INFO L125 PetriNetUnfolderBase]: For 467249/467253 co-relation queries the response was YES. [2024-06-28 03:22:43,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46448 conditions, 5555 events. 3605/5555 cut-off events. For 467249/467253 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 30288 event pairs, 1041 based on Foata normal form. 14/5568 useless extension candidates. Maximal degree in co-relation 46335. Up to 4689 conditions per place. [2024-06-28 03:22:43,328 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 255 selfloop transitions, 145 changer transitions 0/412 dead transitions. [2024-06-28 03:22:43,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 412 transitions, 5460 flow [2024-06-28 03:22:43,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 03:22:43,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 03:22:43,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 210 transitions. [2024-06-28 03:22:43,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-28 03:22:43,335 INFO L175 Difference]: Start difference. First operand has 246 places, 353 transitions, 4264 flow. Second operand 11 states and 210 transitions. [2024-06-28 03:22:43,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 412 transitions, 5460 flow [2024-06-28 03:22:44,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 412 transitions, 5292 flow, removed 57 selfloop flow, removed 4 redundant places. [2024-06-28 03:22:44,100 INFO L231 Difference]: Finished difference. Result has 254 places, 360 transitions, 4578 flow [2024-06-28 03:22:44,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4096, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4578, PETRI_PLACES=254, PETRI_TRANSITIONS=360} [2024-06-28 03:22:44,100 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 211 predicate places. [2024-06-28 03:22:44,100 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 360 transitions, 4578 flow [2024-06-28 03:22:44,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:22:44,101 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:22:44,101 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:22:44,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-28 03:22:44,101 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:22:44,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:22:44,101 INFO L85 PathProgramCache]: Analyzing trace with hash -1398655279, now seen corresponding path program 4 times [2024-06-28 03:22:44,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:22:44,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387699293] [2024-06-28 03:22:44,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:22:44,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:22:44,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:22:45,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:22:45,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:22:45,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387699293] [2024-06-28 03:22:45,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387699293] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:22:45,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:22:45,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-28 03:22:45,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463853826] [2024-06-28 03:22:45,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:22:45,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-28 03:22:45,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:22:45,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-28 03:22:45,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-28 03:22:45,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:22:45,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 360 transitions, 4578 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:22:45,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:22:45,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:22:45,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:22:47,158 INFO L124 PetriNetUnfolderBase]: 3646/5624 cut-off events. [2024-06-28 03:22:47,159 INFO L125 PetriNetUnfolderBase]: For 488476/488480 co-relation queries the response was YES. [2024-06-28 03:22:47,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47763 conditions, 5624 events. 3646/5624 cut-off events. For 488476/488480 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 30804 event pairs, 1030 based on Foata normal form. 14/5637 useless extension candidates. Maximal degree in co-relation 47649. Up to 4760 conditions per place. [2024-06-28 03:22:47,223 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 253 selfloop transitions, 148 changer transitions 0/413 dead transitions. [2024-06-28 03:22:47,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 413 transitions, 5728 flow [2024-06-28 03:22:47,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 03:22:47,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 03:22:47,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 208 transitions. [2024-06-28 03:22:47,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45021645021645024 [2024-06-28 03:22:47,225 INFO L175 Difference]: Start difference. First operand has 254 places, 360 transitions, 4578 flow. Second operand 11 states and 208 transitions. [2024-06-28 03:22:47,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 413 transitions, 5728 flow [2024-06-28 03:22:47,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 413 transitions, 5495 flow, removed 27 selfloop flow, removed 7 redundant places. [2024-06-28 03:22:47,946 INFO L231 Difference]: Finished difference. Result has 258 places, 361 transitions, 4713 flow [2024-06-28 03:22:47,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4345, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4713, PETRI_PLACES=258, PETRI_TRANSITIONS=361} [2024-06-28 03:22:47,947 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 215 predicate places. [2024-06-28 03:22:47,947 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 361 transitions, 4713 flow [2024-06-28 03:22:47,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:22:47,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:22:47,948 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:22:47,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-28 03:22:47,948 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:22:47,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:22:47,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1398424639, now seen corresponding path program 5 times [2024-06-28 03:22:47,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:22:47,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600354217] [2024-06-28 03:22:47,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:22:47,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:22:47,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:22:49,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:22:49,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:22:49,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600354217] [2024-06-28 03:22:49,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600354217] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:22:49,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:22:49,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-28 03:22:49,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164175226] [2024-06-28 03:22:49,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:22:49,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-28 03:22:49,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:22:49,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-28 03:22:49,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-28 03:22:49,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:22:49,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 361 transitions, 4713 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:22:49,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:22:49,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:22:49,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:22:50,812 INFO L124 PetriNetUnfolderBase]: 3687/5695 cut-off events. [2024-06-28 03:22:50,813 INFO L125 PetriNetUnfolderBase]: For 507480/507484 co-relation queries the response was YES. [2024-06-28 03:22:50,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48425 conditions, 5695 events. 3687/5695 cut-off events. For 507480/507484 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 31349 event pairs, 1038 based on Foata normal form. 14/5708 useless extension candidates. Maximal degree in co-relation 48310. Up to 4723 conditions per place. [2024-06-28 03:22:50,892 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 243 selfloop transitions, 159 changer transitions 0/414 dead transitions. [2024-06-28 03:22:50,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 414 transitions, 5865 flow [2024-06-28 03:22:50,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 03:22:50,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 03:22:50,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 208 transitions. [2024-06-28 03:22:50,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45021645021645024 [2024-06-28 03:22:50,894 INFO L175 Difference]: Start difference. First operand has 258 places, 361 transitions, 4713 flow. Second operand 11 states and 208 transitions. [2024-06-28 03:22:50,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 414 transitions, 5865 flow [2024-06-28 03:22:51,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 414 transitions, 5515 flow, removed 28 selfloop flow, removed 9 redundant places. [2024-06-28 03:22:51,653 INFO L231 Difference]: Finished difference. Result has 260 places, 362 transitions, 4755 flow [2024-06-28 03:22:51,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4363, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4755, PETRI_PLACES=260, PETRI_TRANSITIONS=362} [2024-06-28 03:22:51,654 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 217 predicate places. [2024-06-28 03:22:51,654 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 362 transitions, 4755 flow [2024-06-28 03:22:51,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:22:51,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:22:51,655 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:22:51,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-28 03:22:51,655 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)] === [2024-06-28 03:22:51,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:22:51,655 INFO L85 PathProgramCache]: Analyzing trace with hash 822388455, now seen corresponding path program 2 times [2024-06-28 03:22:51,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:22:51,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48202747] [2024-06-28 03:22:51,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:22:51,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:22:51,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:22:52,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:22:52,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:22:52,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48202747] [2024-06-28 03:22:52,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48202747] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:22:52,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:22:52,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:22:52,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920197987] [2024-06-28 03:22:52,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:22:52,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:22:52,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:22:52,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:22:52,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:22:52,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:22:52,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 362 transitions, 4755 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:22:52,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:22:52,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:22:52,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:22:53,734 INFO L124 PetriNetUnfolderBase]: 3684/5674 cut-off events. [2024-06-28 03:22:53,735 INFO L125 PetriNetUnfolderBase]: For 502796/502800 co-relation queries the response was YES. [2024-06-28 03:22:53,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48357 conditions, 5674 events. 3684/5674 cut-off events. For 502796/502800 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 31077 event pairs, 1338 based on Foata normal form. 5/5678 useless extension candidates. Maximal degree in co-relation 48241. Up to 5407 conditions per place. [2024-06-28 03:22:53,796 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 319 selfloop transitions, 51 changer transitions 0/382 dead transitions. [2024-06-28 03:22:53,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 382 transitions, 5807 flow [2024-06-28 03:22:53,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:22:53,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:22:53,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-28 03:22:53,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-28 03:22:53,797 INFO L175 Difference]: Start difference. First operand has 260 places, 362 transitions, 4755 flow. Second operand 8 states and 145 transitions. [2024-06-28 03:22:53,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 382 transitions, 5807 flow [2024-06-28 03:22:54,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 382 transitions, 5421 flow, removed 35 selfloop flow, removed 9 redundant places. [2024-06-28 03:22:54,551 INFO L231 Difference]: Finished difference. Result has 259 places, 362 transitions, 4477 flow [2024-06-28 03:22:54,552 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4369, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4477, PETRI_PLACES=259, PETRI_TRANSITIONS=362} [2024-06-28 03:22:54,552 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 216 predicate places. [2024-06-28 03:22:54,552 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 362 transitions, 4477 flow [2024-06-28 03:22:54,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:22:54,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:22:54,553 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:22:54,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-28 03:22:54,553 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)] === [2024-06-28 03:22:54,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:22:54,553 INFO L85 PathProgramCache]: Analyzing trace with hash 812861287, now seen corresponding path program 2 times [2024-06-28 03:22:54,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:22:54,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487561941] [2024-06-28 03:22:54,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:22:54,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:22:54,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:22:55,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:22:55,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:22:55,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487561941] [2024-06-28 03:22:55,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487561941] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:22:55,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:22:55,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:22:55,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741801472] [2024-06-28 03:22:55,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:22:55,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:22:55,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:22:55,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:22:55,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:22:55,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:22:55,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 362 transitions, 4477 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:22:55,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:22:55,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:22:55,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:22:56,971 INFO L124 PetriNetUnfolderBase]: 3731/5752 cut-off events. [2024-06-28 03:22:56,971 INFO L125 PetriNetUnfolderBase]: For 511004/511006 co-relation queries the response was YES. [2024-06-28 03:22:57,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48187 conditions, 5752 events. 3731/5752 cut-off events. For 511004/511006 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 31611 event pairs, 1225 based on Foata normal form. 3/5754 useless extension candidates. Maximal degree in co-relation 48070. Up to 5465 conditions per place. [2024-06-28 03:22:57,036 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 336 selfloop transitions, 62 changer transitions 0/410 dead transitions. [2024-06-28 03:22:57,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 410 transitions, 5725 flow [2024-06-28 03:22:57,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:22:57,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:22:57,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-28 03:22:57,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-28 03:22:57,037 INFO L175 Difference]: Start difference. First operand has 259 places, 362 transitions, 4477 flow. Second operand 9 states and 166 transitions. [2024-06-28 03:22:57,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 410 transitions, 5725 flow [2024-06-28 03:22:57,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 410 transitions, 5634 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-28 03:22:57,658 INFO L231 Difference]: Finished difference. Result has 265 places, 383 transitions, 4783 flow [2024-06-28 03:22:57,658 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4386, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4783, PETRI_PLACES=265, PETRI_TRANSITIONS=383} [2024-06-28 03:22:57,658 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 222 predicate places. [2024-06-28 03:22:57,658 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 383 transitions, 4783 flow [2024-06-28 03:22:57,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:22:57,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:22:57,659 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:22:57,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-28 03:22:57,659 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)] === [2024-06-28 03:22:57,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:22:57,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1265357437, now seen corresponding path program 3 times [2024-06-28 03:22:57,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:22:57,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577534118] [2024-06-28 03:22:57,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:22:57,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:22:57,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:22:58,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:22:58,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:22:58,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577534118] [2024-06-28 03:22:58,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577534118] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:22:58,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:22:58,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:22:58,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589372081] [2024-06-28 03:22:58,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:22:58,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:22:58,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:22:58,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:22:58,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:22:58,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:22:58,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 383 transitions, 4783 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:22:58,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:22:58,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:22:58,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:23:00,030 INFO L124 PetriNetUnfolderBase]: 3741/5766 cut-off events. [2024-06-28 03:23:00,030 INFO L125 PetriNetUnfolderBase]: For 526552/526554 co-relation queries the response was YES. [2024-06-28 03:23:00,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48666 conditions, 5766 events. 3741/5766 cut-off events. For 526552/526554 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 31685 event pairs, 1225 based on Foata normal form. 3/5768 useless extension candidates. Maximal degree in co-relation 48547. Up to 5501 conditions per place. [2024-06-28 03:23:00,094 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 344 selfloop transitions, 55 changer transitions 0/411 dead transitions. [2024-06-28 03:23:00,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 411 transitions, 5760 flow [2024-06-28 03:23:00,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:23:00,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:23:00,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-28 03:23:00,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-06-28 03:23:00,095 INFO L175 Difference]: Start difference. First operand has 265 places, 383 transitions, 4783 flow. Second operand 9 states and 160 transitions. [2024-06-28 03:23:00,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 411 transitions, 5760 flow [2024-06-28 03:23:00,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 411 transitions, 5676 flow, removed 29 selfloop flow, removed 3 redundant places. [2024-06-28 03:23:00,831 INFO L231 Difference]: Finished difference. Result has 271 places, 389 transitions, 4919 flow [2024-06-28 03:23:00,831 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4708, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4919, PETRI_PLACES=271, PETRI_TRANSITIONS=389} [2024-06-28 03:23:00,832 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 228 predicate places. [2024-06-28 03:23:00,832 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 389 transitions, 4919 flow [2024-06-28 03:23:00,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:23:00,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:23:00,832 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:23:00,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-28 03:23:00,832 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)] === [2024-06-28 03:23:00,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:23:00,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1280867977, now seen corresponding path program 4 times [2024-06-28 03:23:00,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:23:00,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302808073] [2024-06-28 03:23:00,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:23:00,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:23:00,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:23:01,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:23:01,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:23:01,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302808073] [2024-06-28 03:23:01,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302808073] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:23:01,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:23:01,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:23:01,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634837666] [2024-06-28 03:23:01,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:23:01,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:23:01,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:23:01,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:23:01,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:23:01,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:23:01,741 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 389 transitions, 4919 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:23:01,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:23:01,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:23:01,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:23:03,122 INFO L124 PetriNetUnfolderBase]: 3738/5762 cut-off events. [2024-06-28 03:23:03,122 INFO L125 PetriNetUnfolderBase]: For 540246/540250 co-relation queries the response was YES. [2024-06-28 03:23:03,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48894 conditions, 5762 events. 3738/5762 cut-off events. For 540246/540250 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 31634 event pairs, 1207 based on Foata normal form. 5/5766 useless extension candidates. Maximal degree in co-relation 48774. Up to 5500 conditions per place. [2024-06-28 03:23:03,183 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 343 selfloop transitions, 53 changer transitions 0/408 dead transitions. [2024-06-28 03:23:03,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 408 transitions, 5785 flow [2024-06-28 03:23:03,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:23:03,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:23:03,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-28 03:23:03,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41005291005291006 [2024-06-28 03:23:03,185 INFO L175 Difference]: Start difference. First operand has 271 places, 389 transitions, 4919 flow. Second operand 9 states and 155 transitions. [2024-06-28 03:23:03,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 408 transitions, 5785 flow [2024-06-28 03:23:03,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 408 transitions, 5640 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-28 03:23:03,842 INFO L231 Difference]: Finished difference. Result has 274 places, 389 transitions, 4886 flow [2024-06-28 03:23:03,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4774, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4886, PETRI_PLACES=274, PETRI_TRANSITIONS=389} [2024-06-28 03:23:03,842 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 231 predicate places. [2024-06-28 03:23:03,843 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 389 transitions, 4886 flow [2024-06-28 03:23:03,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:23:03,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:23:03,843 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:23:03,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-28 03:23:03,843 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)] === [2024-06-28 03:23:03,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:23:03,844 INFO L85 PathProgramCache]: Analyzing trace with hash 822396391, now seen corresponding path program 1 times [2024-06-28 03:23:03,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:23:03,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672714178] [2024-06-28 03:23:03,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:23:03,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:23:03,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:23:04,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:23:04,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:23:04,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672714178] [2024-06-28 03:23:04,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672714178] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:23:04,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:23:04,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:23:04,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318609227] [2024-06-28 03:23:04,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:23:04,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:23:04,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:23:04,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:23:04,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:23:04,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:23:04,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 389 transitions, 4886 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:23:04,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:23:04,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:23:04,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:23:06,174 INFO L124 PetriNetUnfolderBase]: 3626/5584 cut-off events. [2024-06-28 03:23:06,174 INFO L125 PetriNetUnfolderBase]: For 575829/575869 co-relation queries the response was YES. [2024-06-28 03:23:06,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48121 conditions, 5584 events. 3626/5584 cut-off events. For 575829/575869 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 30607 event pairs, 1182 based on Foata normal form. 26/5552 useless extension candidates. Maximal degree in co-relation 48000. Up to 5269 conditions per place. [2024-06-28 03:23:06,240 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 329 selfloop transitions, 64 changer transitions 0/420 dead transitions. [2024-06-28 03:23:06,240 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 420 transitions, 6002 flow [2024-06-28 03:23:06,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:23:06,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:23:06,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-28 03:23:06,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-28 03:23:06,242 INFO L175 Difference]: Start difference. First operand has 274 places, 389 transitions, 4886 flow. Second operand 9 states and 159 transitions. [2024-06-28 03:23:06,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 420 transitions, 6002 flow [2024-06-28 03:23:07,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 420 transitions, 5879 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-28 03:23:07,214 INFO L231 Difference]: Finished difference. Result has 278 places, 398 transitions, 5073 flow [2024-06-28 03:23:07,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4763, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5073, PETRI_PLACES=278, PETRI_TRANSITIONS=398} [2024-06-28 03:23:07,214 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 235 predicate places. [2024-06-28 03:23:07,214 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 398 transitions, 5073 flow [2024-06-28 03:23:07,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:23:07,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:23:07,215 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:23:07,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-28 03:23:07,215 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)] === [2024-06-28 03:23:07,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:23:07,215 INFO L85 PathProgramCache]: Analyzing trace with hash -984862373, now seen corresponding path program 5 times [2024-06-28 03:23:07,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:23:07,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577501622] [2024-06-28 03:23:07,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:23:07,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:23:07,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:23:08,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:23:08,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:23:08,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577501622] [2024-06-28 03:23:08,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577501622] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:23:08,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:23:08,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:23:08,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328108124] [2024-06-28 03:23:08,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:23:08,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:23:08,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:23:08,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:23:08,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:23:08,346 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:23:08,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 398 transitions, 5073 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:23:08,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:23:08,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:23:08,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:23:09,662 INFO L124 PetriNetUnfolderBase]: 3849/5930 cut-off events. [2024-06-28 03:23:09,662 INFO L125 PetriNetUnfolderBase]: For 575556/575556 co-relation queries the response was YES. [2024-06-28 03:23:09,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51357 conditions, 5930 events. 3849/5930 cut-off events. For 575556/575556 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 32767 event pairs, 1654 based on Foata normal form. 1/5930 useless extension candidates. Maximal degree in co-relation 51233. Up to 5641 conditions per place. [2024-06-28 03:23:09,730 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 383 selfloop transitions, 72 changer transitions 0/467 dead transitions. [2024-06-28 03:23:09,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 467 transitions, 6888 flow [2024-06-28 03:23:09,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:23:09,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:23:09,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-28 03:23:09,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2024-06-28 03:23:09,731 INFO L175 Difference]: Start difference. First operand has 278 places, 398 transitions, 5073 flow. Second operand 9 states and 154 transitions. [2024-06-28 03:23:09,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 467 transitions, 6888 flow [2024-06-28 03:23:10,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 467 transitions, 6764 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-28 03:23:10,656 INFO L231 Difference]: Finished difference. Result has 286 places, 443 transitions, 5890 flow [2024-06-28 03:23:10,656 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4975, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5890, PETRI_PLACES=286, PETRI_TRANSITIONS=443} [2024-06-28 03:23:10,656 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 243 predicate places. [2024-06-28 03:23:10,657 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 443 transitions, 5890 flow [2024-06-28 03:23:10,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:23:10,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:23:10,657 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:23:10,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-28 03:23:10,657 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:23:10,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:23:10,658 INFO L85 PathProgramCache]: Analyzing trace with hash 644229347, now seen corresponding path program 6 times [2024-06-28 03:23:10,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:23:10,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747770755] [2024-06-28 03:23:10,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:23:10,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:23:10,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:23:12,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:23:12,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:23:12,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747770755] [2024-06-28 03:23:12,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747770755] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:23:12,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:23:12,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-28 03:23:12,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505918686] [2024-06-28 03:23:12,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:23:12,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-28 03:23:12,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:23:12,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-28 03:23:12,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-28 03:23:12,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:23:12,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 443 transitions, 5890 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:23:12,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:23:12,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:23:12,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:23:13,930 INFO L124 PetriNetUnfolderBase]: 3890/5991 cut-off events. [2024-06-28 03:23:13,931 INFO L125 PetriNetUnfolderBase]: For 610833/610835 co-relation queries the response was YES. [2024-06-28 03:23:13,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52438 conditions, 5991 events. 3890/5991 cut-off events. For 610833/610835 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 33049 event pairs, 1245 based on Foata normal form. 14/6004 useless extension candidates. Maximal degree in co-relation 52308. Up to 5313 conditions per place. [2024-06-28 03:23:14,010 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 395 selfloop transitions, 78 changer transitions 0/485 dead transitions. [2024-06-28 03:23:14,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 485 transitions, 7116 flow [2024-06-28 03:23:14,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:23:14,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:23:14,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 180 transitions. [2024-06-28 03:23:14,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-28 03:23:14,011 INFO L175 Difference]: Start difference. First operand has 286 places, 443 transitions, 5890 flow. Second operand 10 states and 180 transitions. [2024-06-28 03:23:14,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 485 transitions, 7116 flow [2024-06-28 03:23:15,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 485 transitions, 7055 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-06-28 03:23:15,173 INFO L231 Difference]: Finished difference. Result has 293 places, 444 transitions, 6067 flow [2024-06-28 03:23:15,173 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5829, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=443, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6067, PETRI_PLACES=293, PETRI_TRANSITIONS=444} [2024-06-28 03:23:15,174 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 250 predicate places. [2024-06-28 03:23:15,174 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 444 transitions, 6067 flow [2024-06-28 03:23:15,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:23:15,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:23:15,174 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:23:15,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-28 03:23:15,175 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)] === [2024-06-28 03:23:15,175 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:23:15,175 INFO L85 PathProgramCache]: Analyzing trace with hash -1803078075, now seen corresponding path program 3 times [2024-06-28 03:23:15,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:23:15,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929885059] [2024-06-28 03:23:15,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:23:15,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:23:15,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:23:15,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:23:15,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:23:15,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929885059] [2024-06-28 03:23:15,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929885059] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:23:15,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:23:15,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:23:15,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001824009] [2024-06-28 03:23:15,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:23:15,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:23:15,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:23:15,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:23:15,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:23:16,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:23:16,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 444 transitions, 6067 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:23:16,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:23:16,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:23:16,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:23:17,283 INFO L124 PetriNetUnfolderBase]: 3908/6015 cut-off events. [2024-06-28 03:23:17,283 INFO L125 PetriNetUnfolderBase]: For 618819/618823 co-relation queries the response was YES. [2024-06-28 03:23:17,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53310 conditions, 6015 events. 3908/6015 cut-off events. For 618819/618823 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 33227 event pairs, 1381 based on Foata normal form. 6/6020 useless extension candidates. Maximal degree in co-relation 53178. Up to 5724 conditions per place. [2024-06-28 03:23:17,363 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 395 selfloop transitions, 66 changer transitions 0/473 dead transitions. [2024-06-28 03:23:17,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 473 transitions, 7466 flow [2024-06-28 03:23:17,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:23:17,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:23:17,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-28 03:23:17,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4421768707482993 [2024-06-28 03:23:17,364 INFO L175 Difference]: Start difference. First operand has 293 places, 444 transitions, 6067 flow. Second operand 7 states and 130 transitions. [2024-06-28 03:23:17,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 473 transitions, 7466 flow [2024-06-28 03:23:18,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 473 transitions, 7253 flow, removed 38 selfloop flow, removed 7 redundant places. [2024-06-28 03:23:18,648 INFO L231 Difference]: Finished difference. Result has 293 places, 453 transitions, 6123 flow [2024-06-28 03:23:18,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5862, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=444, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6123, PETRI_PLACES=293, PETRI_TRANSITIONS=453} [2024-06-28 03:23:18,649 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 250 predicate places. [2024-06-28 03:23:18,649 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 453 transitions, 6123 flow [2024-06-28 03:23:18,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:23:18,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:23:18,650 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:23:18,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-28 03:23:18,650 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)] === [2024-06-28 03:23:18,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:23:18,650 INFO L85 PathProgramCache]: Analyzing trace with hash 1570260581, now seen corresponding path program 4 times [2024-06-28 03:23:18,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:23:18,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028561093] [2024-06-28 03:23:18,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:23:18,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:23:18,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:23:19,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:23:19,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:23:19,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028561093] [2024-06-28 03:23:19,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028561093] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:23:19,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:23:19,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:23:19,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727451756] [2024-06-28 03:23:19,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:23:19,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:23:19,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:23:19,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:23:19,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:23:19,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:23:19,572 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 453 transitions, 6123 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:23:19,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:23:19,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:23:19,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:23:20,796 INFO L124 PetriNetUnfolderBase]: 3919/6025 cut-off events. [2024-06-28 03:23:20,796 INFO L125 PetriNetUnfolderBase]: For 594652/594656 co-relation queries the response was YES. [2024-06-28 03:23:20,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52756 conditions, 6025 events. 3919/6025 cut-off events. For 594652/594656 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 33256 event pairs, 1372 based on Foata normal form. 5/6029 useless extension candidates. Maximal degree in co-relation 52623. Up to 5739 conditions per place. [2024-06-28 03:23:20,875 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 391 selfloop transitions, 73 changer transitions 0/476 dead transitions. [2024-06-28 03:23:20,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 476 transitions, 7486 flow [2024-06-28 03:23:20,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:23:20,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:23:20,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-28 03:23:20,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43197278911564624 [2024-06-28 03:23:20,876 INFO L175 Difference]: Start difference. First operand has 293 places, 453 transitions, 6123 flow. Second operand 7 states and 127 transitions. [2024-06-28 03:23:20,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 476 transitions, 7486 flow [2024-06-28 03:23:22,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 476 transitions, 7337 flow, removed 37 selfloop flow, removed 4 redundant places. [2024-06-28 03:23:22,236 INFO L231 Difference]: Finished difference. Result has 296 places, 460 transitions, 6246 flow [2024-06-28 03:23:22,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5997, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=453, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6246, PETRI_PLACES=296, PETRI_TRANSITIONS=460} [2024-06-28 03:23:22,237 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 253 predicate places. [2024-06-28 03:23:22,237 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 460 transitions, 6246 flow [2024-06-28 03:23:22,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:23:22,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:23:22,237 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:23:22,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-28 03:23:22,238 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:23:22,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:23:22,238 INFO L85 PathProgramCache]: Analyzing trace with hash -1976520315, now seen corresponding path program 7 times [2024-06-28 03:23:22,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:23:22,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097138045] [2024-06-28 03:23:22,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:23:22,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:23:22,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:23:23,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:23:23,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:23:23,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097138045] [2024-06-28 03:23:23,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097138045] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:23:23,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:23:23,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-28 03:23:23,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881995079] [2024-06-28 03:23:23,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:23:23,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-28 03:23:23,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:23:23,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-28 03:23:23,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-28 03:23:24,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:23:24,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 460 transitions, 6246 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:23:24,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:23:24,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:23:24,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:23:25,444 INFO L124 PetriNetUnfolderBase]: 3960/6106 cut-off events. [2024-06-28 03:23:25,444 INFO L125 PetriNetUnfolderBase]: For 615240/615244 co-relation queries the response was YES. [2024-06-28 03:23:25,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53362 conditions, 6106 events. 3960/6106 cut-off events. For 615240/615244 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 33909 event pairs, 1114 based on Foata normal form. 14/6119 useless extension candidates. Maximal degree in co-relation 53229. Up to 5139 conditions per place. [2024-06-28 03:23:25,527 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 338 selfloop transitions, 156 changer transitions 0/506 dead transitions. [2024-06-28 03:23:25,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 506 transitions, 7576 flow [2024-06-28 03:23:25,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:23:25,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:23:25,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 187 transitions. [2024-06-28 03:23:25,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4452380952380952 [2024-06-28 03:23:25,529 INFO L175 Difference]: Start difference. First operand has 296 places, 460 transitions, 6246 flow. Second operand 10 states and 187 transitions. [2024-06-28 03:23:25,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 506 transitions, 7576 flow [2024-06-28 03:23:26,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 506 transitions, 7474 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-28 03:23:26,741 INFO L231 Difference]: Finished difference. Result has 302 places, 461 transitions, 6532 flow [2024-06-28 03:23:26,742 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6144, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6532, PETRI_PLACES=302, PETRI_TRANSITIONS=461} [2024-06-28 03:23:26,742 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 259 predicate places. [2024-06-28 03:23:26,742 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 461 transitions, 6532 flow [2024-06-28 03:23:26,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:23:26,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:23:26,743 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:23:26,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-28 03:23:26,743 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:23:26,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:23:26,745 INFO L85 PathProgramCache]: Analyzing trace with hash -452123983, now seen corresponding path program 8 times [2024-06-28 03:23:26,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:23:26,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950574709] [2024-06-28 03:23:26,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:23:26,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:23:26,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:23:28,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:23:28,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:23:28,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950574709] [2024-06-28 03:23:28,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950574709] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:23:28,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:23:28,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-28 03:23:28,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767972448] [2024-06-28 03:23:28,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:23:28,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-28 03:23:28,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:23:28,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-28 03:23:28,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-28 03:23:28,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:23:28,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 461 transitions, 6532 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:23:28,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:23:28,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:23:28,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:23:29,725 INFO L124 PetriNetUnfolderBase]: 4001/6179 cut-off events. [2024-06-28 03:23:29,725 INFO L125 PetriNetUnfolderBase]: For 626632/626636 co-relation queries the response was YES. [2024-06-28 03:23:29,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54567 conditions, 6179 events. 4001/6179 cut-off events. For 626632/626636 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 34596 event pairs, 1096 based on Foata normal form. 14/6192 useless extension candidates. Maximal degree in co-relation 54434. Up to 5016 conditions per place. [2024-06-28 03:23:29,810 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 320 selfloop transitions, 174 changer transitions 0/506 dead transitions. [2024-06-28 03:23:29,810 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 506 transitions, 7846 flow [2024-06-28 03:23:29,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:23:29,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:23:29,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 187 transitions. [2024-06-28 03:23:29,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4452380952380952 [2024-06-28 03:23:29,811 INFO L175 Difference]: Start difference. First operand has 302 places, 461 transitions, 6532 flow. Second operand 10 states and 187 transitions. [2024-06-28 03:23:29,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 506 transitions, 7846 flow [2024-06-28 03:23:30,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 506 transitions, 7474 flow, removed 32 selfloop flow, removed 8 redundant places. [2024-06-28 03:23:30,753 INFO L231 Difference]: Finished difference. Result has 304 places, 462 transitions, 6586 flow [2024-06-28 03:23:30,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6162, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6586, PETRI_PLACES=304, PETRI_TRANSITIONS=462} [2024-06-28 03:23:30,754 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 261 predicate places. [2024-06-28 03:23:30,754 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 462 transitions, 6586 flow [2024-06-28 03:23:30,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:23:30,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:23:30,754 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:23:30,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-28 03:23:30,755 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:23:30,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:23:30,755 INFO L85 PathProgramCache]: Analyzing trace with hash -624844513, now seen corresponding path program 9 times [2024-06-28 03:23:30,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:23:30,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771439744] [2024-06-28 03:23:30,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:23:30,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:23:30,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:23:32,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:23:32,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:23:32,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771439744] [2024-06-28 03:23:32,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771439744] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:23:32,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:23:32,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-28 03:23:32,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520045881] [2024-06-28 03:23:32,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:23:32,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-28 03:23:32,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:23:32,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-28 03:23:32,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-28 03:23:32,412 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:23:32,412 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 462 transitions, 6586 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:23:32,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:23:32,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:23:32,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:23:34,179 INFO L124 PetriNetUnfolderBase]: 4042/6252 cut-off events. [2024-06-28 03:23:34,180 INFO L125 PetriNetUnfolderBase]: For 625854/625858 co-relation queries the response was YES. [2024-06-28 03:23:34,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55012 conditions, 6252 events. 4042/6252 cut-off events. For 625854/625858 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 35016 event pairs, 1135 based on Foata normal form. 14/6265 useless extension candidates. Maximal degree in co-relation 54878. Up to 5281 conditions per place. [2024-06-28 03:23:34,272 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 343 selfloop transitions, 152 changer transitions 0/507 dead transitions. [2024-06-28 03:23:34,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 507 transitions, 7906 flow [2024-06-28 03:23:34,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:23:34,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:23:34,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-28 03:23:34,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-28 03:23:34,274 INFO L175 Difference]: Start difference. First operand has 304 places, 462 transitions, 6586 flow. Second operand 10 states and 189 transitions. [2024-06-28 03:23:34,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 507 transitions, 7906 flow [2024-06-28 03:23:35,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 507 transitions, 7498 flow, removed 32 selfloop flow, removed 8 redundant places. [2024-06-28 03:23:35,327 INFO L231 Difference]: Finished difference. Result has 306 places, 463 transitions, 6560 flow [2024-06-28 03:23:35,328 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6180, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6560, PETRI_PLACES=306, PETRI_TRANSITIONS=463} [2024-06-28 03:23:35,328 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 263 predicate places. [2024-06-28 03:23:35,328 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 463 transitions, 6560 flow [2024-06-28 03:23:35,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:23:35,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:23:35,328 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:23:35,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-28 03:23:35,329 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)] === [2024-06-28 03:23:35,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:23:35,329 INFO L85 PathProgramCache]: Analyzing trace with hash -984593603, now seen corresponding path program 6 times [2024-06-28 03:23:35,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:23:35,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904241817] [2024-06-28 03:23:35,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:23:35,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:23:35,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:23:36,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:23:36,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:23:36,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904241817] [2024-06-28 03:23:36,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904241817] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:23:36,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:23:36,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:23:36,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028126643] [2024-06-28 03:23:36,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:23:36,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:23:36,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:23:36,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:23:36,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:23:36,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:23:36,525 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 463 transitions, 6560 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:23:36,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:23:36,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:23:36,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:23:37,945 INFO L124 PetriNetUnfolderBase]: 4052/6270 cut-off events. [2024-06-28 03:23:37,946 INFO L125 PetriNetUnfolderBase]: For 607098/607098 co-relation queries the response was YES. [2024-06-28 03:23:38,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54715 conditions, 6270 events. 4052/6270 cut-off events. For 607098/607098 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 35297 event pairs, 1696 based on Foata normal form. 1/6270 useless extension candidates. Maximal degree in co-relation 54580. Up to 6017 conditions per place. [2024-06-28 03:23:38,031 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 418 selfloop transitions, 58 changer transitions 0/488 dead transitions. [2024-06-28 03:23:38,031 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 488 transitions, 7742 flow [2024-06-28 03:23:38,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:23:38,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:23:38,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-28 03:23:38,040 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3915343915343915 [2024-06-28 03:23:38,040 INFO L175 Difference]: Start difference. First operand has 306 places, 463 transitions, 6560 flow. Second operand 9 states and 148 transitions. [2024-06-28 03:23:38,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 488 transitions, 7742 flow [2024-06-28 03:23:39,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 488 transitions, 7374 flow, removed 31 selfloop flow, removed 8 redundant places. [2024-06-28 03:23:39,111 INFO L231 Difference]: Finished difference. Result has 308 places, 471 transitions, 6506 flow [2024-06-28 03:23:39,112 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6198, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6506, PETRI_PLACES=308, PETRI_TRANSITIONS=471} [2024-06-28 03:23:39,112 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 265 predicate places. [2024-06-28 03:23:39,112 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 471 transitions, 6506 flow [2024-06-28 03:23:39,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:23:39,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:23:39,112 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:23:39,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-28 03:23:39,113 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)] === [2024-06-28 03:23:39,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:23:39,113 INFO L85 PathProgramCache]: Analyzing trace with hash 1570268517, now seen corresponding path program 2 times [2024-06-28 03:23:39,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:23:39,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732556661] [2024-06-28 03:23:39,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:23:39,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:23:39,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:23:40,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:23:40,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:23:40,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732556661] [2024-06-28 03:23:40,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732556661] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:23:40,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:23:40,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:23:40,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964316505] [2024-06-28 03:23:40,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:23:40,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:23:40,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:23:40,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:23:40,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:23:40,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:23:40,183 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 471 transitions, 6506 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:23:40,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:23:40,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:23:40,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:23:41,584 INFO L124 PetriNetUnfolderBase]: 3939/6087 cut-off events. [2024-06-28 03:23:41,585 INFO L125 PetriNetUnfolderBase]: For 626359/626426 co-relation queries the response was YES. [2024-06-28 03:23:41,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53278 conditions, 6087 events. 3939/6087 cut-off events. For 626359/626426 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 34179 event pairs, 1252 based on Foata normal form. 31/6055 useless extension candidates. Maximal degree in co-relation 53141. Up to 5705 conditions per place. [2024-06-28 03:23:41,653 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 369 selfloop transitions, 94 changer transitions 0/499 dead transitions. [2024-06-28 03:23:41,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 499 transitions, 7825 flow [2024-06-28 03:23:41,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:23:41,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:23:41,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-28 03:23:41,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-28 03:23:41,654 INFO L175 Difference]: Start difference. First operand has 308 places, 471 transitions, 6506 flow. Second operand 8 states and 144 transitions. [2024-06-28 03:23:41,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 499 transitions, 7825 flow [2024-06-28 03:23:42,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 499 transitions, 7701 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-28 03:23:42,606 INFO L231 Difference]: Finished difference. Result has 310 places, 479 transitions, 6772 flow [2024-06-28 03:23:42,606 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6382, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=471, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=382, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6772, PETRI_PLACES=310, PETRI_TRANSITIONS=479} [2024-06-28 03:23:42,607 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 267 predicate places. [2024-06-28 03:23:42,607 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 479 transitions, 6772 flow [2024-06-28 03:23:42,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:23:42,607 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:23:42,607 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:23:42,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-28 03:23:42,607 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)] === [2024-06-28 03:23:42,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:23:42,608 INFO L85 PathProgramCache]: Analyzing trace with hash -975339173, now seen corresponding path program 7 times [2024-06-28 03:23:42,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:23:42,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708770713] [2024-06-28 03:23:42,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:23:42,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:23:42,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:23:43,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:23:43,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:23:43,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708770713] [2024-06-28 03:23:43,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708770713] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:23:43,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:23:43,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:23:43,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676481375] [2024-06-28 03:23:43,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:23:43,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:23:43,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:23:43,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:23:43,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:23:43,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:23:43,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 479 transitions, 6772 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:23:43,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:23:43,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:23:43,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:23:45,292 INFO L124 PetriNetUnfolderBase]: 4117/6351 cut-off events. [2024-06-28 03:23:45,292 INFO L125 PetriNetUnfolderBase]: For 627020/627032 co-relation queries the response was YES. [2024-06-28 03:23:45,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55706 conditions, 6351 events. 4117/6351 cut-off events. For 627020/627032 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 35580 event pairs, 1284 based on Foata normal form. 3/6348 useless extension candidates. Maximal degree in co-relation 55568. Up to 6060 conditions per place. [2024-06-28 03:23:45,364 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 404 selfloop transitions, 81 changer transitions 0/497 dead transitions. [2024-06-28 03:23:45,364 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 497 transitions, 7866 flow [2024-06-28 03:23:45,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:23:45,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:23:45,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-28 03:23:45,365 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-28 03:23:45,365 INFO L175 Difference]: Start difference. First operand has 310 places, 479 transitions, 6772 flow. Second operand 8 states and 137 transitions. [2024-06-28 03:23:45,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 497 transitions, 7866 flow [2024-06-28 03:23:46,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 497 transitions, 7689 flow, removed 53 selfloop flow, removed 4 redundant places. [2024-06-28 03:23:46,280 INFO L231 Difference]: Finished difference. Result has 314 places, 482 transitions, 6839 flow [2024-06-28 03:23:46,280 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6595, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6839, PETRI_PLACES=314, PETRI_TRANSITIONS=482} [2024-06-28 03:23:46,281 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 271 predicate places. [2024-06-28 03:23:46,281 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 482 transitions, 6839 flow [2024-06-28 03:23:46,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:23:46,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:23:46,281 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:23:46,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-28 03:23:46,282 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)] === [2024-06-28 03:23:46,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:23:46,282 INFO L85 PathProgramCache]: Analyzing trace with hash -1659187545, now seen corresponding path program 5 times [2024-06-28 03:23:46,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:23:46,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890841682] [2024-06-28 03:23:46,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:23:46,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:23:46,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:23:47,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:23:47,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:23:47,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890841682] [2024-06-28 03:23:47,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890841682] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:23:47,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:23:47,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:23:47,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809083145] [2024-06-28 03:23:47,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:23:47,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:23:47,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:23:47,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:23:47,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:23:47,146 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:23:47,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 482 transitions, 6839 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:23:47,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:23:47,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:23:47,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:23:48,541 INFO L124 PetriNetUnfolderBase]: 4111/6350 cut-off events. [2024-06-28 03:23:48,541 INFO L125 PetriNetUnfolderBase]: For 639748/639758 co-relation queries the response was YES. [2024-06-28 03:23:48,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55549 conditions, 6350 events. 4111/6350 cut-off events. For 639748/639758 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 35717 event pairs, 1740 based on Foata normal form. 2/6346 useless extension candidates. Maximal degree in co-relation 55409. Up to 6127 conditions per place. [2024-06-28 03:23:48,663 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 454 selfloop transitions, 32 changer transitions 0/498 dead transitions. [2024-06-28 03:23:48,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 498 transitions, 8021 flow [2024-06-28 03:23:48,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:23:48,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:23:48,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-28 03:23:48,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-28 03:23:48,665 INFO L175 Difference]: Start difference. First operand has 314 places, 482 transitions, 6839 flow. Second operand 8 states and 134 transitions. [2024-06-28 03:23:48,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 498 transitions, 8021 flow [2024-06-28 03:23:50,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 498 transitions, 7809 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-28 03:23:50,598 INFO L231 Difference]: Finished difference. Result has 316 places, 482 transitions, 6703 flow [2024-06-28 03:23:50,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6629, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=450, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6703, PETRI_PLACES=316, PETRI_TRANSITIONS=482} [2024-06-28 03:23:50,599 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 273 predicate places. [2024-06-28 03:23:50,599 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 482 transitions, 6703 flow [2024-06-28 03:23:50,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:23:50,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:23:50,599 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:23:50,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-28 03:23:50,599 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)] === [2024-06-28 03:23:50,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:23:50,600 INFO L85 PathProgramCache]: Analyzing trace with hash 226488539, now seen corresponding path program 6 times [2024-06-28 03:23:50,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:23:50,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591498248] [2024-06-28 03:23:50,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:23:50,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:23:50,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:23:51,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:23:51,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:23:51,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591498248] [2024-06-28 03:23:51,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591498248] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:23:51,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:23:51,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:23:51,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529410187] [2024-06-28 03:23:51,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:23:51,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:23:51,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:23:51,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:23:51,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:23:51,402 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:23:51,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 482 transitions, 6703 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:23:51,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:23:51,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:23:51,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:23:52,739 INFO L124 PetriNetUnfolderBase]: 4116/6357 cut-off events. [2024-06-28 03:23:52,739 INFO L125 PetriNetUnfolderBase]: For 636693/636703 co-relation queries the response was YES. [2024-06-28 03:23:52,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55441 conditions, 6357 events. 4116/6357 cut-off events. For 636693/636703 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 35794 event pairs, 1741 based on Foata normal form. 1/6352 useless extension candidates. Maximal degree in co-relation 55301. Up to 6154 conditions per place. [2024-06-28 03:23:52,825 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 464 selfloop transitions, 21 changer transitions 0/497 dead transitions. [2024-06-28 03:23:52,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 497 transitions, 7778 flow [2024-06-28 03:23:52,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:23:52,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:23:52,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-28 03:23:52,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38392857142857145 [2024-06-28 03:23:52,828 INFO L175 Difference]: Start difference. First operand has 316 places, 482 transitions, 6703 flow. Second operand 8 states and 129 transitions. [2024-06-28 03:23:52,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 497 transitions, 7778 flow [2024-06-28 03:23:53,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 497 transitions, 7644 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-28 03:23:53,944 INFO L231 Difference]: Finished difference. Result has 317 places, 485 transitions, 6674 flow [2024-06-28 03:23:53,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6581, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=461, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6674, PETRI_PLACES=317, PETRI_TRANSITIONS=485} [2024-06-28 03:23:53,944 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 274 predicate places. [2024-06-28 03:23:53,944 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 485 transitions, 6674 flow [2024-06-28 03:23:53,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:23:53,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:23:53,945 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:23:53,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-28 03:23:53,945 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)] === [2024-06-28 03:23:53,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:23:53,946 INFO L85 PathProgramCache]: Analyzing trace with hash -362113155, now seen corresponding path program 7 times [2024-06-28 03:23:53,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:23:53,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846382136] [2024-06-28 03:23:53,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:23:53,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:23:53,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:23:54,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:23:54,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:23:54,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846382136] [2024-06-28 03:23:54,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846382136] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:23:54,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:23:54,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:23:54,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232988210] [2024-06-28 03:23:54,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:23:54,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:23:54,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:23:54,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:23:54,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:23:54,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:23:54,844 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 485 transitions, 6674 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:23:54,844 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:23:54,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:23:54,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:23:56,101 INFO L124 PetriNetUnfolderBase]: 4113/6354 cut-off events. [2024-06-28 03:23:56,101 INFO L125 PetriNetUnfolderBase]: For 650691/650703 co-relation queries the response was YES. [2024-06-28 03:23:56,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55491 conditions, 6354 events. 4113/6354 cut-off events. For 650691/650703 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 35766 event pairs, 1744 based on Foata normal form. 3/6351 useless extension candidates. Maximal degree in co-relation 55351. Up to 6140 conditions per place. [2024-06-28 03:23:56,185 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 455 selfloop transitions, 28 changer transitions 0/495 dead transitions. [2024-06-28 03:23:56,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 495 transitions, 7812 flow [2024-06-28 03:23:56,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:23:56,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:23:56,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-28 03:23:56,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4013605442176871 [2024-06-28 03:23:56,186 INFO L175 Difference]: Start difference. First operand has 317 places, 485 transitions, 6674 flow. Second operand 7 states and 118 transitions. [2024-06-28 03:23:56,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 495 transitions, 7812 flow [2024-06-28 03:23:57,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 495 transitions, 7744 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-28 03:23:57,609 INFO L231 Difference]: Finished difference. Result has 318 places, 485 transitions, 6668 flow [2024-06-28 03:23:57,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6606, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=457, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6668, PETRI_PLACES=318, PETRI_TRANSITIONS=485} [2024-06-28 03:23:57,610 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 275 predicate places. [2024-06-28 03:23:57,610 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 485 transitions, 6668 flow [2024-06-28 03:23:57,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:23:57,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:23:57,611 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:23:57,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-28 03:23:57,611 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)] === [2024-06-28 03:23:57,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:23:57,611 INFO L85 PathProgramCache]: Analyzing trace with hash 370379069, now seen corresponding path program 8 times [2024-06-28 03:23:57,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:23:57,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860475347] [2024-06-28 03:23:57,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:23:57,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:23:57,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:23:58,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:23:58,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:23:58,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860475347] [2024-06-28 03:23:58,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860475347] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:23:58,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:23:58,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:23:58,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578357760] [2024-06-28 03:23:58,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:23:58,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:23:58,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:23:58,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:23:58,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:23:58,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:23:58,406 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 485 transitions, 6668 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:23:58,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:23:58,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:23:58,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:23:59,691 INFO L124 PetriNetUnfolderBase]: 4117/6359 cut-off events. [2024-06-28 03:23:59,691 INFO L125 PetriNetUnfolderBase]: For 668083/668095 co-relation queries the response was YES. [2024-06-28 03:23:59,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55787 conditions, 6359 events. 4117/6359 cut-off events. For 668083/668095 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 35774 event pairs, 1729 based on Foata normal form. 3/6356 useless extension candidates. Maximal degree in co-relation 55646. Up to 6153 conditions per place. [2024-06-28 03:23:59,778 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 461 selfloop transitions, 21 changer transitions 0/494 dead transitions. [2024-06-28 03:23:59,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 494 transitions, 7666 flow [2024-06-28 03:23:59,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:23:59,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:23:59,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-28 03:23:59,779 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-28 03:23:59,780 INFO L175 Difference]: Start difference. First operand has 318 places, 485 transitions, 6668 flow. Second operand 8 states and 126 transitions. [2024-06-28 03:23:59,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 494 transitions, 7666 flow [2024-06-28 03:24:01,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 494 transitions, 7523 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-28 03:24:01,088 INFO L231 Difference]: Finished difference. Result has 319 places, 485 transitions, 6573 flow [2024-06-28 03:24:01,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6525, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=464, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6573, PETRI_PLACES=319, PETRI_TRANSITIONS=485} [2024-06-28 03:24:01,089 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 276 predicate places. [2024-06-28 03:24:01,089 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 485 transitions, 6573 flow [2024-06-28 03:24:01,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:24:01,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:24:01,089 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:24:01,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-28 03:24:01,090 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:24:01,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:24:01,090 INFO L85 PathProgramCache]: Analyzing trace with hash -739941229, now seen corresponding path program 10 times [2024-06-28 03:24:01,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:24:01,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072226435] [2024-06-28 03:24:01,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:24:01,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:24:01,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:24:02,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:24:02,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:24:02,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072226435] [2024-06-28 03:24:02,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072226435] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:24:02,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:24:02,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:24:02,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456599794] [2024-06-28 03:24:02,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:24:02,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:24:02,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:24:02,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:24:02,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:24:02,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:24:02,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 485 transitions, 6573 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:24:02,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:24:02,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:24:02,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:24:03,808 INFO L124 PetriNetUnfolderBase]: 4158/6429 cut-off events. [2024-06-28 03:24:03,808 INFO L125 PetriNetUnfolderBase]: For 707320/707330 co-relation queries the response was YES. [2024-06-28 03:24:03,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56555 conditions, 6429 events. 4158/6429 cut-off events. For 707320/707330 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 36267 event pairs, 1696 based on Foata normal form. 12/6435 useless extension candidates. Maximal degree in co-relation 56414. Up to 6085 conditions per place. [2024-06-28 03:24:03,894 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 489 selfloop transitions, 21 changer transitions 0/522 dead transitions. [2024-06-28 03:24:03,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 522 transitions, 7841 flow [2024-06-28 03:24:03,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:24:03,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:24:03,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 174 transitions. [2024-06-28 03:24:03,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4142857142857143 [2024-06-28 03:24:03,896 INFO L175 Difference]: Start difference. First operand has 319 places, 485 transitions, 6573 flow. Second operand 10 states and 174 transitions. [2024-06-28 03:24:03,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 522 transitions, 7841 flow [2024-06-28 03:24:05,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 522 transitions, 7797 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-28 03:24:05,041 INFO L231 Difference]: Finished difference. Result has 323 places, 486 transitions, 6645 flow [2024-06-28 03:24:05,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6529, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=464, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6645, PETRI_PLACES=323, PETRI_TRANSITIONS=486} [2024-06-28 03:24:05,042 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 280 predicate places. [2024-06-28 03:24:05,042 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 486 transitions, 6645 flow [2024-06-28 03:24:05,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:24:05,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:24:05,042 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:24:05,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-28 03:24:05,042 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:24:05,043 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:24:05,043 INFO L85 PathProgramCache]: Analyzing trace with hash 1532947991, now seen corresponding path program 11 times [2024-06-28 03:24:05,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:24:05,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31808363] [2024-06-28 03:24:05,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:24:05,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:24:05,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:24:06,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:24:06,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:24:06,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31808363] [2024-06-28 03:24:06,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31808363] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:24:06,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:24:06,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-28 03:24:06,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709916293] [2024-06-28 03:24:06,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:24:06,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-28 03:24:06,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:24:06,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-28 03:24:06,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-06-28 03:24:06,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:24:06,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 486 transitions, 6645 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:24:06,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:24:06,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:24:06,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:24:08,134 INFO L124 PetriNetUnfolderBase]: 4199/6500 cut-off events. [2024-06-28 03:24:08,134 INFO L125 PetriNetUnfolderBase]: For 732974/732984 co-relation queries the response was YES. [2024-06-28 03:24:08,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57526 conditions, 6500 events. 4199/6500 cut-off events. For 732974/732984 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 36851 event pairs, 1750 based on Foata normal form. 12/6506 useless extension candidates. Maximal degree in co-relation 57384. Up to 6040 conditions per place. [2024-06-28 03:24:08,224 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 468 selfloop transitions, 43 changer transitions 0/523 dead transitions. [2024-06-28 03:24:08,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 523 transitions, 7921 flow [2024-06-28 03:24:08,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:24:08,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:24:08,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 177 transitions. [2024-06-28 03:24:08,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42142857142857143 [2024-06-28 03:24:08,226 INFO L175 Difference]: Start difference. First operand has 323 places, 486 transitions, 6645 flow. Second operand 10 states and 177 transitions. [2024-06-28 03:24:08,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 523 transitions, 7921 flow [2024-06-28 03:24:09,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 523 transitions, 7823 flow, removed 29 selfloop flow, removed 8 redundant places. [2024-06-28 03:24:09,707 INFO L231 Difference]: Finished difference. Result has 325 places, 487 transitions, 6709 flow [2024-06-28 03:24:09,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6547, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=486, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=443, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6709, PETRI_PLACES=325, PETRI_TRANSITIONS=487} [2024-06-28 03:24:09,707 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 282 predicate places. [2024-06-28 03:24:09,707 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 487 transitions, 6709 flow [2024-06-28 03:24:09,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:24:09,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:24:09,708 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:24:09,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-28 03:24:09,708 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:24:09,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:24:09,708 INFO L85 PathProgramCache]: Analyzing trace with hash 2028973189, now seen corresponding path program 12 times [2024-06-28 03:24:09,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:24:09,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555905433] [2024-06-28 03:24:09,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:24:09,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:24:09,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:24:11,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:24:11,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:24:11,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555905433] [2024-06-28 03:24:11,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555905433] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:24:11,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:24:11,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-28 03:24:11,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420617481] [2024-06-28 03:24:11,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:24:11,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-28 03:24:11,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:24:11,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-28 03:24:11,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-28 03:24:11,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:24:11,246 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 487 transitions, 6709 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:24:11,246 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:24:11,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:24:11,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:24:12,666 INFO L124 PetriNetUnfolderBase]: 4240/6565 cut-off events. [2024-06-28 03:24:12,667 INFO L125 PetriNetUnfolderBase]: For 752898/752908 co-relation queries the response was YES. [2024-06-28 03:24:12,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58210 conditions, 6565 events. 4240/6565 cut-off events. For 752898/752908 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 37366 event pairs, 1730 based on Foata normal form. 12/6571 useless extension candidates. Maximal degree in co-relation 58067. Up to 6101 conditions per place. [2024-06-28 03:24:12,758 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 463 selfloop transitions, 51 changer transitions 0/526 dead transitions. [2024-06-28 03:24:12,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 526 transitions, 8017 flow [2024-06-28 03:24:12,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:24:12,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:24:12,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 179 transitions. [2024-06-28 03:24:12,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4261904761904762 [2024-06-28 03:24:12,760 INFO L175 Difference]: Start difference. First operand has 325 places, 487 transitions, 6709 flow. Second operand 10 states and 179 transitions. [2024-06-28 03:24:12,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 526 transitions, 8017 flow [2024-06-28 03:24:14,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 526 transitions, 7873 flow, removed 30 selfloop flow, removed 8 redundant places. [2024-06-28 03:24:14,306 INFO L231 Difference]: Finished difference. Result has 327 places, 488 transitions, 6745 flow [2024-06-28 03:24:14,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6565, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=487, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=436, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6745, PETRI_PLACES=327, PETRI_TRANSITIONS=488} [2024-06-28 03:24:14,307 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 284 predicate places. [2024-06-28 03:24:14,307 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 488 transitions, 6745 flow [2024-06-28 03:24:14,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:24:14,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:24:14,307 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:24:14,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-28 03:24:14,308 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:24:14,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:24:14,308 INFO L85 PathProgramCache]: Analyzing trace with hash -2093504217, now seen corresponding path program 13 times [2024-06-28 03:24:14,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:24:14,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542114534] [2024-06-28 03:24:14,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:24:14,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:24:14,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:24:15,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:24:15,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:24:15,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542114534] [2024-06-28 03:24:15,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542114534] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:24:15,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:24:15,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-28 03:24:15,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24265881] [2024-06-28 03:24:15,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:24:15,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-28 03:24:15,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:24:15,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-28 03:24:15,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-28 03:24:15,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:24:15,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 488 transitions, 6745 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:24:15,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:24:15,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:24:15,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:24:17,478 INFO L124 PetriNetUnfolderBase]: 4281/6638 cut-off events. [2024-06-28 03:24:17,478 INFO L125 PetriNetUnfolderBase]: For 773641/773651 co-relation queries the response was YES. [2024-06-28 03:24:17,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58866 conditions, 6638 events. 4281/6638 cut-off events. For 773641/773651 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 38015 event pairs, 1759 based on Foata normal form. 12/6644 useless extension candidates. Maximal degree in co-relation 58722. Up to 6138 conditions per place. [2024-06-28 03:24:17,570 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 453 selfloop transitions, 62 changer transitions 0/527 dead transitions. [2024-06-28 03:24:17,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 527 transitions, 8057 flow [2024-06-28 03:24:17,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:24:17,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:24:17,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 181 transitions. [2024-06-28 03:24:17,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.430952380952381 [2024-06-28 03:24:17,572 INFO L175 Difference]: Start difference. First operand has 327 places, 488 transitions, 6745 flow. Second operand 10 states and 181 transitions. [2024-06-28 03:24:17,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 527 transitions, 8057 flow [2024-06-28 03:24:18,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 527 transitions, 7895 flow, removed 31 selfloop flow, removed 8 redundant places. [2024-06-28 03:24:18,961 INFO L231 Difference]: Finished difference. Result has 329 places, 489 transitions, 6787 flow [2024-06-28 03:24:18,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6583, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=488, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6787, PETRI_PLACES=329, PETRI_TRANSITIONS=489} [2024-06-28 03:24:18,961 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 286 predicate places. [2024-06-28 03:24:18,961 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 489 transitions, 6787 flow [2024-06-28 03:24:18,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:24:18,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:24:18,962 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:24:18,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-28 03:24:18,962 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:24:18,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:24:18,962 INFO L85 PathProgramCache]: Analyzing trace with hash 1530217613, now seen corresponding path program 14 times [2024-06-28 03:24:18,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:24:18,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204781276] [2024-06-28 03:24:18,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:24:18,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:24:18,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:24:20,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:24:20,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:24:20,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204781276] [2024-06-28 03:24:20,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204781276] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:24:20,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:24:20,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-28 03:24:20,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134127288] [2024-06-28 03:24:20,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:24:20,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-28 03:24:20,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:24:20,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-28 03:24:20,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-28 03:24:20,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:24:20,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 489 transitions, 6787 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:24:20,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:24:20,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:24:20,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:24:22,198 INFO L124 PetriNetUnfolderBase]: 4322/6710 cut-off events. [2024-06-28 03:24:22,198 INFO L125 PetriNetUnfolderBase]: For 794468/794478 co-relation queries the response was YES. [2024-06-28 03:24:22,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59486 conditions, 6710 events. 4322/6710 cut-off events. For 794468/794478 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 38630 event pairs, 1768 based on Foata normal form. 12/6716 useless extension candidates. Maximal degree in co-relation 59341. Up to 6295 conditions per place. [2024-06-28 03:24:22,298 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 474 selfloop transitions, 41 changer transitions 0/527 dead transitions. [2024-06-28 03:24:22,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 527 transitions, 8096 flow [2024-06-28 03:24:22,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:24:22,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:24:22,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 176 transitions. [2024-06-28 03:24:22,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41904761904761906 [2024-06-28 03:24:22,300 INFO L175 Difference]: Start difference. First operand has 329 places, 489 transitions, 6787 flow. Second operand 10 states and 176 transitions. [2024-06-28 03:24:22,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 527 transitions, 8096 flow [2024-06-28 03:24:23,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 527 transitions, 7910 flow, removed 32 selfloop flow, removed 8 redundant places. [2024-06-28 03:24:23,889 INFO L231 Difference]: Finished difference. Result has 331 places, 490 transitions, 6766 flow [2024-06-28 03:24:23,889 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6601, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=448, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6766, PETRI_PLACES=331, PETRI_TRANSITIONS=490} [2024-06-28 03:24:23,890 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 288 predicate places. [2024-06-28 03:24:23,890 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 490 transitions, 6766 flow [2024-06-28 03:24:23,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:24:23,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:24:23,890 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:24:23,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-28 03:24:23,890 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:24:23,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:24:23,891 INFO L85 PathProgramCache]: Analyzing trace with hash -186706161, now seen corresponding path program 15 times [2024-06-28 03:24:23,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:24:23,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957397650] [2024-06-28 03:24:23,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:24:23,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:24:23,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:24:25,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:24:25,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:24:25,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957397650] [2024-06-28 03:24:25,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957397650] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:24:25,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:24:25,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-28 03:24:25,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575420102] [2024-06-28 03:24:25,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:24:25,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-28 03:24:25,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:24:25,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-28 03:24:25,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-28 03:24:25,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:24:25,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 490 transitions, 6766 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:24:25,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:24:25,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:24:25,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:24:26,868 INFO L124 PetriNetUnfolderBase]: 4302/6679 cut-off events. [2024-06-28 03:24:26,869 INFO L125 PetriNetUnfolderBase]: For 784931/784941 co-relation queries the response was YES. [2024-06-28 03:24:26,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58288 conditions, 6679 events. 4302/6679 cut-off events. For 784931/784941 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 38367 event pairs, 1759 based on Foata normal form. 12/6685 useless extension candidates. Maximal degree in co-relation 58142. Up to 6112 conditions per place. [2024-06-28 03:24:26,958 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 448 selfloop transitions, 67 changer transitions 0/527 dead transitions. [2024-06-28 03:24:26,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 527 transitions, 7910 flow [2024-06-28 03:24:26,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:24:26,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:24:26,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 180 transitions. [2024-06-28 03:24:26,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-28 03:24:26,960 INFO L175 Difference]: Start difference. First operand has 331 places, 490 transitions, 6766 flow. Second operand 10 states and 180 transitions. [2024-06-28 03:24:26,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 527 transitions, 7910 flow [2024-06-28 03:24:28,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 527 transitions, 7765 flow, removed 33 selfloop flow, removed 8 redundant places. [2024-06-28 03:24:28,457 INFO L231 Difference]: Finished difference. Result has 332 places, 489 transitions, 6667 flow [2024-06-28 03:24:28,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6529, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=422, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6667, PETRI_PLACES=332, PETRI_TRANSITIONS=489} [2024-06-28 03:24:28,457 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 289 predicate places. [2024-06-28 03:24:28,457 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 489 transitions, 6667 flow [2024-06-28 03:24:28,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:24:28,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:24:28,458 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:24:28,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-28 03:24:28,458 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)] === [2024-06-28 03:24:28,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:24:28,458 INFO L85 PathProgramCache]: Analyzing trace with hash 1429779389, now seen corresponding path program 3 times [2024-06-28 03:24:28,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:24:28,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677329501] [2024-06-28 03:24:28,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:24:28,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:24:28,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:24:29,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:24:29,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:24:29,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677329501] [2024-06-28 03:24:29,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677329501] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:24:29,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:24:29,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:24:29,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704483195] [2024-06-28 03:24:29,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:24:29,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:24:29,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:24:29,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:24:29,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:24:29,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:24:29,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 489 transitions, 6667 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:24:29,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:24:29,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:24:29,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:24:30,775 INFO L124 PetriNetUnfolderBase]: 4183/6497 cut-off events. [2024-06-28 03:24:30,775 INFO L125 PetriNetUnfolderBase]: For 826120/826200 co-relation queries the response was YES. [2024-06-28 03:24:30,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57697 conditions, 6497 events. 4183/6497 cut-off events. For 826120/826200 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 37595 event pairs, 1763 based on Foata normal form. 29/6455 useless extension candidates. Maximal degree in co-relation 57550. Up to 6240 conditions per place. [2024-06-28 03:24:30,867 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 450 selfloop transitions, 27 changer transitions 0/514 dead transitions. [2024-06-28 03:24:30,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 514 transitions, 8077 flow [2024-06-28 03:24:30,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:24:30,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:24:30,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-28 03:24:30,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-28 03:24:30,869 INFO L175 Difference]: Start difference. First operand has 332 places, 489 transitions, 6667 flow. Second operand 8 states and 133 transitions. [2024-06-28 03:24:30,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 514 transitions, 8077 flow [2024-06-28 03:24:32,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 514 transitions, 7833 flow, removed 34 selfloop flow, removed 9 redundant places. [2024-06-28 03:24:32,164 INFO L231 Difference]: Finished difference. Result has 331 places, 499 transitions, 6747 flow [2024-06-28 03:24:32,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6423, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=467, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6747, PETRI_PLACES=331, PETRI_TRANSITIONS=499} [2024-06-28 03:24:32,165 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 288 predicate places. [2024-06-28 03:24:32,165 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 499 transitions, 6747 flow [2024-06-28 03:24:32,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:24:32,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:24:32,166 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:24:32,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-28 03:24:32,166 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)] === [2024-06-28 03:24:32,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:24:32,166 INFO L85 PathProgramCache]: Analyzing trace with hash 1430224859, now seen corresponding path program 4 times [2024-06-28 03:24:32,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:24:32,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203213014] [2024-06-28 03:24:32,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:24:32,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:24:32,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:24:32,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:24:32,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:24:32,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203213014] [2024-06-28 03:24:32,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203213014] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:24:32,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:24:32,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:24:32,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310644072] [2024-06-28 03:24:32,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:24:32,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:24:32,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:24:32,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:24:32,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:24:32,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:24:32,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 499 transitions, 6747 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:24:32,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:24:32,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:24:32,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:24:34,453 INFO L124 PetriNetUnfolderBase]: 4166/6474 cut-off events. [2024-06-28 03:24:34,453 INFO L125 PetriNetUnfolderBase]: For 819099/819161 co-relation queries the response was YES. [2024-06-28 03:24:34,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56519 conditions, 6474 events. 4166/6474 cut-off events. For 819099/819161 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 37387 event pairs, 1742 based on Foata normal form. 30/6435 useless extension candidates. Maximal degree in co-relation 56372. Up to 6241 conditions per place. [2024-06-28 03:24:34,551 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 454 selfloop transitions, 20 changer transitions 0/511 dead transitions. [2024-06-28 03:24:34,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 511 transitions, 7738 flow [2024-06-28 03:24:34,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:24:34,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:24:34,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-28 03:24:34,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-28 03:24:34,552 INFO L175 Difference]: Start difference. First operand has 331 places, 499 transitions, 6747 flow. Second operand 8 states and 128 transitions. [2024-06-28 03:24:34,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 511 transitions, 7738 flow [2024-06-28 03:24:36,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 511 transitions, 7532 flow, removed 92 selfloop flow, removed 4 redundant places. [2024-06-28 03:24:36,019 INFO L231 Difference]: Finished difference. Result has 335 places, 499 transitions, 6589 flow [2024-06-28 03:24:36,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6541, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=479, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6589, PETRI_PLACES=335, PETRI_TRANSITIONS=499} [2024-06-28 03:24:36,020 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 292 predicate places. [2024-06-28 03:24:36,020 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 499 transitions, 6589 flow [2024-06-28 03:24:36,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:24:36,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:24:36,020 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:24:36,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-28 03:24:36,020 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)] === [2024-06-28 03:24:36,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:24:36,021 INFO L85 PathProgramCache]: Analyzing trace with hash -2078082245, now seen corresponding path program 8 times [2024-06-28 03:24:36,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:24:36,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143984107] [2024-06-28 03:24:36,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:24:36,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:24:36,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:24:37,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:24:37,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:24:37,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143984107] [2024-06-28 03:24:37,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143984107] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:24:37,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:24:37,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:24:37,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557939931] [2024-06-28 03:24:37,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:24:37,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:24:37,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:24:37,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:24:37,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:24:37,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:24:37,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 499 transitions, 6589 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:24:37,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:24:37,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:24:37,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:24:38,663 INFO L124 PetriNetUnfolderBase]: 4350/6750 cut-off events. [2024-06-28 03:24:38,663 INFO L125 PetriNetUnfolderBase]: For 799465/799467 co-relation queries the response was YES. [2024-06-28 03:24:38,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58170 conditions, 6750 events. 4350/6750 cut-off events. For 799465/799467 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 38856 event pairs, 1787 based on Foata normal form. 1/6746 useless extension candidates. Maximal degree in co-relation 58022. Up to 6554 conditions per place. [2024-06-28 03:24:38,755 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 478 selfloop transitions, 19 changer transitions 0/509 dead transitions. [2024-06-28 03:24:38,756 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 509 transitions, 7619 flow [2024-06-28 03:24:38,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:24:38,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:24:38,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 136 transitions. [2024-06-28 03:24:38,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35978835978835977 [2024-06-28 03:24:38,757 INFO L175 Difference]: Start difference. First operand has 335 places, 499 transitions, 6589 flow. Second operand 9 states and 136 transitions. [2024-06-28 03:24:38,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 509 transitions, 7619 flow [2024-06-28 03:24:40,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 509 transitions, 7545 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-28 03:24:40,288 INFO L231 Difference]: Finished difference. Result has 337 places, 499 transitions, 6559 flow [2024-06-28 03:24:40,288 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6515, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=480, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6559, PETRI_PLACES=337, PETRI_TRANSITIONS=499} [2024-06-28 03:24:40,289 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 294 predicate places. [2024-06-28 03:24:40,289 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 499 transitions, 6559 flow [2024-06-28 03:24:40,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:24:40,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:24:40,289 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:24:40,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-28 03:24:40,289 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)] === [2024-06-28 03:24:40,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:24:40,290 INFO L85 PathProgramCache]: Analyzing trace with hash -2078070341, now seen corresponding path program 5 times [2024-06-28 03:24:40,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:24:40,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682642297] [2024-06-28 03:24:40,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:24:40,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:24:40,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:24:41,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:24:41,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:24:41,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682642297] [2024-06-28 03:24:41,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682642297] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:24:41,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:24:41,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:24:41,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541210115] [2024-06-28 03:24:41,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:24:41,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:24:41,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:24:41,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:24:41,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:24:41,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:24:41,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 499 transitions, 6559 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:24:41,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:24:41,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:24:41,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:24:42,589 INFO L124 PetriNetUnfolderBase]: 4145/6446 cut-off events. [2024-06-28 03:24:42,589 INFO L125 PetriNetUnfolderBase]: For 834387/834437 co-relation queries the response was YES. [2024-06-28 03:24:42,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55955 conditions, 6446 events. 4145/6446 cut-off events. For 834387/834437 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 37275 event pairs, 1738 based on Foata normal form. 32/6409 useless extension candidates. Maximal degree in co-relation 55806. Up to 6177 conditions per place. [2024-06-28 03:24:42,677 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 438 selfloop transitions, 38 changer transitions 0/513 dead transitions. [2024-06-28 03:24:42,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 513 transitions, 7561 flow [2024-06-28 03:24:42,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:24:42,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:24:42,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-28 03:24:42,678 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-28 03:24:42,678 INFO L175 Difference]: Start difference. First operand has 337 places, 499 transitions, 6559 flow. Second operand 8 states and 134 transitions. [2024-06-28 03:24:42,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 513 transitions, 7561 flow [2024-06-28 03:24:44,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 513 transitions, 7437 flow, removed 40 selfloop flow, removed 7 redundant places. [2024-06-28 03:24:44,333 INFO L231 Difference]: Finished difference. Result has 338 places, 499 transitions, 6519 flow [2024-06-28 03:24:44,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6435, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=461, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6519, PETRI_PLACES=338, PETRI_TRANSITIONS=499} [2024-06-28 03:24:44,334 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 295 predicate places. [2024-06-28 03:24:44,334 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 499 transitions, 6519 flow [2024-06-28 03:24:44,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:24:44,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:24:44,334 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:24:44,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-28 03:24:44,334 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)] === [2024-06-28 03:24:44,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:24:44,335 INFO L85 PathProgramCache]: Analyzing trace with hash 222777560, now seen corresponding path program 1 times [2024-06-28 03:24:44,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:24:44,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883006940] [2024-06-28 03:24:44,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:24:44,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:24:44,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:24:45,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:24:45,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:24:45,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883006940] [2024-06-28 03:24:45,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883006940] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:24:45,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:24:45,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:24:45,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104582773] [2024-06-28 03:24:45,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:24:45,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:24:45,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:24:45,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:24:45,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:24:45,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:24:45,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 499 transitions, 6519 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:24:45,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:24:45,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:24:45,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:24:46,874 INFO L124 PetriNetUnfolderBase]: 4462/6862 cut-off events. [2024-06-28 03:24:46,874 INFO L125 PetriNetUnfolderBase]: For 818081/818081 co-relation queries the response was YES. [2024-06-28 03:24:46,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58644 conditions, 6862 events. 4462/6862 cut-off events. For 818081/818081 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 38947 event pairs, 1858 based on Foata normal form. 2/6863 useless extension candidates. Maximal degree in co-relation 58494. Up to 6753 conditions per place. [2024-06-28 03:24:46,967 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 497 selfloop transitions, 20 changer transitions 0/520 dead transitions. [2024-06-28 03:24:46,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 520 transitions, 7687 flow [2024-06-28 03:24:46,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:24:46,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:24:46,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-28 03:24:46,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-28 03:24:46,968 INFO L175 Difference]: Start difference. First operand has 338 places, 499 transitions, 6519 flow. Second operand 8 states and 128 transitions. [2024-06-28 03:24:46,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 520 transitions, 7687 flow [2024-06-28 03:24:48,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 520 transitions, 7495 flow, removed 25 selfloop flow, removed 8 redundant places. [2024-06-28 03:24:48,567 INFO L231 Difference]: Finished difference. Result has 338 places, 502 transitions, 6429 flow [2024-06-28 03:24:48,568 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6327, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=479, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6429, PETRI_PLACES=338, PETRI_TRANSITIONS=502} [2024-06-28 03:24:48,568 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 295 predicate places. [2024-06-28 03:24:48,568 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 502 transitions, 6429 flow [2024-06-28 03:24:48,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:24:48,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:24:48,569 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:24:48,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-28 03:24:48,569 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)] === [2024-06-28 03:24:48,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:24:48,569 INFO L85 PathProgramCache]: Analyzing trace with hash 226502210, now seen corresponding path program 2 times [2024-06-28 03:24:48,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:24:48,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087093949] [2024-06-28 03:24:48,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:24:48,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:24:48,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:24:49,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:24:49,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:24:49,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087093949] [2024-06-28 03:24:49,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087093949] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:24:49,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:24:49,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:24:49,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547469484] [2024-06-28 03:24:49,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:24:49,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:24:49,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:24:49,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:24:49,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:24:49,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:24:49,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 502 transitions, 6429 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:24:49,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:24:49,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:24:49,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:24:51,200 INFO L124 PetriNetUnfolderBase]: 4488/6898 cut-off events. [2024-06-28 03:24:51,200 INFO L125 PetriNetUnfolderBase]: For 842123/842123 co-relation queries the response was YES. [2024-06-28 03:24:51,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59452 conditions, 6898 events. 4488/6898 cut-off events. For 842123/842123 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 39155 event pairs, 1856 based on Foata normal form. 2/6899 useless extension candidates. Maximal degree in co-relation 59302. Up to 6724 conditions per place. [2024-06-28 03:24:51,295 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 480 selfloop transitions, 47 changer transitions 0/530 dead transitions. [2024-06-28 03:24:51,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 530 transitions, 8051 flow [2024-06-28 03:24:51,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:24:51,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:24:51,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-28 03:24:51,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-28 03:24:51,296 INFO L175 Difference]: Start difference. First operand has 338 places, 502 transitions, 6429 flow. Second operand 8 states and 135 transitions. [2024-06-28 03:24:51,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 530 transitions, 8051 flow [2024-06-28 03:24:53,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 530 transitions, 7971 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-28 03:24:53,521 INFO L231 Difference]: Finished difference. Result has 340 places, 511 transitions, 6623 flow [2024-06-28 03:24:53,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6349, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=502, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=461, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6623, PETRI_PLACES=340, PETRI_TRANSITIONS=511} [2024-06-28 03:24:53,521 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 297 predicate places. [2024-06-28 03:24:53,522 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 511 transitions, 6623 flow [2024-06-28 03:24:53,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:24:53,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:24:53,522 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:24:53,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-28 03:24:53,522 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)] === [2024-06-28 03:24:53,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:24:53,522 INFO L85 PathProgramCache]: Analyzing trace with hash -1067684137, now seen corresponding path program 1 times [2024-06-28 03:24:53,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:24:53,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387467560] [2024-06-28 03:24:53,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:24:53,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:24:53,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:24:54,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:24:54,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:24:54,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387467560] [2024-06-28 03:24:54,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387467560] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:24:54,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:24:54,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:24:54,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671264354] [2024-06-28 03:24:54,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:24:54,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:24:54,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:24:54,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:24:54,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:24:54,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:24:54,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 511 transitions, 6623 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:24:54,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:24:54,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:24:54,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:24:56,366 INFO L124 PetriNetUnfolderBase]: 4503/6919 cut-off events. [2024-06-28 03:24:56,367 INFO L125 PetriNetUnfolderBase]: For 868252/868252 co-relation queries the response was YES. [2024-06-28 03:24:56,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60232 conditions, 6919 events. 4503/6919 cut-off events. For 868252/868252 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 39258 event pairs, 1851 based on Foata normal form. 3/6921 useless extension candidates. Maximal degree in co-relation 60081. Up to 6783 conditions per place. [2024-06-28 03:24:56,461 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 498 selfloop transitions, 35 changer transitions 0/536 dead transitions. [2024-06-28 03:24:56,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 536 transitions, 8029 flow [2024-06-28 03:24:56,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:24:56,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:24:56,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-28 03:24:56,462 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-28 03:24:56,462 INFO L175 Difference]: Start difference. First operand has 340 places, 511 transitions, 6623 flow. Second operand 8 states and 135 transitions. [2024-06-28 03:24:56,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 536 transitions, 8029 flow [2024-06-28 03:24:58,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 536 transitions, 7937 flow, removed 35 selfloop flow, removed 3 redundant places. [2024-06-28 03:24:58,221 INFO L231 Difference]: Finished difference. Result has 345 places, 517 transitions, 6713 flow [2024-06-28 03:24:58,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6531, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=511, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=479, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6713, PETRI_PLACES=345, PETRI_TRANSITIONS=517} [2024-06-28 03:24:58,222 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 302 predicate places. [2024-06-28 03:24:58,222 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 517 transitions, 6713 flow [2024-06-28 03:24:58,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:24:58,222 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:24:58,222 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:24:58,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-28 03:24:58,222 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)] === [2024-06-28 03:24:58,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:24:58,223 INFO L85 PathProgramCache]: Analyzing trace with hash 226496630, now seen corresponding path program 3 times [2024-06-28 03:24:58,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:24:58,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100687316] [2024-06-28 03:24:58,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:24:58,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:24:58,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:24:59,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:24:59,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:24:59,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100687316] [2024-06-28 03:24:59,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100687316] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:24:59,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:24:59,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:24:59,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366954388] [2024-06-28 03:24:59,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:24:59,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:24:59,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:24:59,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:24:59,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:24:59,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:24:59,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 517 transitions, 6713 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:24:59,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:24:59,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:24:59,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:25:00,877 INFO L124 PetriNetUnfolderBase]: 4497/6911 cut-off events. [2024-06-28 03:25:00,878 INFO L125 PetriNetUnfolderBase]: For 879424/879424 co-relation queries the response was YES. [2024-06-28 03:25:00,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60610 conditions, 6911 events. 4497/6911 cut-off events. For 879424/879424 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 39230 event pairs, 1855 based on Foata normal form. 2/6912 useless extension candidates. Maximal degree in co-relation 60457. Up to 6740 conditions per place. [2024-06-28 03:25:00,965 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 486 selfloop transitions, 46 changer transitions 0/535 dead transitions. [2024-06-28 03:25:00,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 535 transitions, 8017 flow [2024-06-28 03:25:00,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:25:00,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:25:00,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-28 03:25:00,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-28 03:25:00,966 INFO L175 Difference]: Start difference. First operand has 345 places, 517 transitions, 6713 flow. Second operand 8 states and 135 transitions. [2024-06-28 03:25:00,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 535 transitions, 8017 flow [2024-06-28 03:25:02,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 535 transitions, 7916 flow, removed 39 selfloop flow, removed 4 redundant places. [2024-06-28 03:25:02,873 INFO L231 Difference]: Finished difference. Result has 349 places, 517 transitions, 6710 flow [2024-06-28 03:25:02,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6612, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=517, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=471, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6710, PETRI_PLACES=349, PETRI_TRANSITIONS=517} [2024-06-28 03:25:02,873 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 306 predicate places. [2024-06-28 03:25:02,873 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 517 transitions, 6710 flow [2024-06-28 03:25:02,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:25:02,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:25:02,874 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:25:02,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-28 03:25:02,874 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)] === [2024-06-28 03:25:02,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:25:02,874 INFO L85 PathProgramCache]: Analyzing trace with hash 404286898, now seen corresponding path program 4 times [2024-06-28 03:25:02,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:25:02,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915316345] [2024-06-28 03:25:02,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:25:02,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:25:02,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:25:03,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:25:03,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:25:03,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915316345] [2024-06-28 03:25:03,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915316345] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:25:03,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:25:03,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:25:03,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754281710] [2024-06-28 03:25:03,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:25:03,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:25:03,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:25:03,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:25:03,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:25:03,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:25:03,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 517 transitions, 6710 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:25:03,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:25:03,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:25:03,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:25:05,664 INFO L124 PetriNetUnfolderBase]: 4507/6926 cut-off events. [2024-06-28 03:25:05,664 INFO L125 PetriNetUnfolderBase]: For 899193/899195 co-relation queries the response was YES. [2024-06-28 03:25:05,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60915 conditions, 6926 events. 4507/6926 cut-off events. For 899193/899195 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 39319 event pairs, 1880 based on Foata normal form. 2/6927 useless extension candidates. Maximal degree in co-relation 60760. Up to 6750 conditions per place. [2024-06-28 03:25:05,749 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 481 selfloop transitions, 50 changer transitions 0/534 dead transitions. [2024-06-28 03:25:05,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 534 transitions, 8054 flow [2024-06-28 03:25:05,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:25:05,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:25:05,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-28 03:25:05,750 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3898809523809524 [2024-06-28 03:25:05,750 INFO L175 Difference]: Start difference. First operand has 349 places, 517 transitions, 6710 flow. Second operand 8 states and 131 transitions. [2024-06-28 03:25:05,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 534 transitions, 8054 flow [2024-06-28 03:25:07,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 534 transitions, 7938 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-28 03:25:07,379 INFO L231 Difference]: Finished difference. Result has 350 places, 520 transitions, 6764 flow [2024-06-28 03:25:07,379 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6600, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=517, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=470, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6764, PETRI_PLACES=350, PETRI_TRANSITIONS=520} [2024-06-28 03:25:07,380 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 307 predicate places. [2024-06-28 03:25:07,380 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 520 transitions, 6764 flow [2024-06-28 03:25:07,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:25:07,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:25:07,380 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:25:07,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-28 03:25:07,380 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)] === [2024-06-28 03:25:07,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:25:07,381 INFO L85 PathProgramCache]: Analyzing trace with hash 1422612034, now seen corresponding path program 5 times [2024-06-28 03:25:07,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:25:07,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571593396] [2024-06-28 03:25:07,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:25:07,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:25:07,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:25:08,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:25:08,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:25:08,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571593396] [2024-06-28 03:25:08,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571593396] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:25:08,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:25:08,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:25:08,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775242152] [2024-06-28 03:25:08,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:25:08,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:25:08,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:25:08,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:25:08,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:25:08,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:25:08,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 520 transitions, 6764 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:25:08,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:25:08,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:25:08,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:25:10,069 INFO L124 PetriNetUnfolderBase]: 4517/6940 cut-off events. [2024-06-28 03:25:10,069 INFO L125 PetriNetUnfolderBase]: For 919206/919208 co-relation queries the response was YES. [2024-06-28 03:25:10,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61260 conditions, 6940 events. 4517/6940 cut-off events. For 919206/919208 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 39410 event pairs, 1881 based on Foata normal form. 2/6941 useless extension candidates. Maximal degree in co-relation 61104. Up to 6760 conditions per place. [2024-06-28 03:25:10,155 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 483 selfloop transitions, 52 changer transitions 0/538 dead transitions. [2024-06-28 03:25:10,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 538 transitions, 8122 flow [2024-06-28 03:25:10,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:25:10,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:25:10,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-28 03:25:10,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-28 03:25:10,157 INFO L175 Difference]: Start difference. First operand has 350 places, 520 transitions, 6764 flow. Second operand 8 states and 133 transitions. [2024-06-28 03:25:10,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 538 transitions, 8122 flow [2024-06-28 03:25:11,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 538 transitions, 7936 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-28 03:25:11,856 INFO L231 Difference]: Finished difference. Result has 352 places, 523 transitions, 6752 flow [2024-06-28 03:25:11,857 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6596, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=520, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=471, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6752, PETRI_PLACES=352, PETRI_TRANSITIONS=523} [2024-06-28 03:25:11,857 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 309 predicate places. [2024-06-28 03:25:11,857 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 523 transitions, 6752 flow [2024-06-28 03:25:11,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:25:11,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:25:11,858 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:25:11,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-28 03:25:11,858 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)] === [2024-06-28 03:25:11,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:25:11,858 INFO L85 PathProgramCache]: Analyzing trace with hash -66493765, now seen corresponding path program 2 times [2024-06-28 03:25:11,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:25:11,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38570697] [2024-06-28 03:25:11,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:25:11,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:25:11,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:25:12,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:25:12,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:25:12,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38570697] [2024-06-28 03:25:12,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38570697] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:25:12,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:25:12,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:25:12,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983433429] [2024-06-28 03:25:12,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:25:12,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:25:12,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:25:12,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:25:12,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:25:12,707 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:25:12,707 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 523 transitions, 6752 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:25:12,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:25:12,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:25:12,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:25:14,564 INFO L124 PetriNetUnfolderBase]: 4532/6961 cut-off events. [2024-06-28 03:25:14,564 INFO L125 PetriNetUnfolderBase]: For 942745/942747 co-relation queries the response was YES. [2024-06-28 03:25:14,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61540 conditions, 6961 events. 4532/6961 cut-off events. For 942745/942747 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 39522 event pairs, 1853 based on Foata normal form. 5/6965 useless extension candidates. Maximal degree in co-relation 61383. Up to 6817 conditions per place. [2024-06-28 03:25:14,655 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 497 selfloop transitions, 41 changer transitions 0/541 dead transitions. [2024-06-28 03:25:14,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 541 transitions, 8100 flow [2024-06-28 03:25:14,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:25:14,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:25:14,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-28 03:25:14,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-28 03:25:14,657 INFO L175 Difference]: Start difference. First operand has 352 places, 523 transitions, 6752 flow. Second operand 8 states and 128 transitions. [2024-06-28 03:25:14,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 541 transitions, 8100 flow [2024-06-28 03:25:16,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 541 transitions, 7978 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-28 03:25:16,850 INFO L231 Difference]: Finished difference. Result has 355 places, 526 transitions, 6765 flow [2024-06-28 03:25:16,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6630, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=523, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=485, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6765, PETRI_PLACES=355, PETRI_TRANSITIONS=526} [2024-06-28 03:25:16,853 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 312 predicate places. [2024-06-28 03:25:16,853 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 526 transitions, 6765 flow [2024-06-28 03:25:16,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:25:16,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:25:16,854 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:25:16,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-28 03:25:16,854 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)] === [2024-06-28 03:25:16,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:25:16,854 INFO L85 PathProgramCache]: Analyzing trace with hash -2064999036, now seen corresponding path program 6 times [2024-06-28 03:25:16,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:25:16,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045600740] [2024-06-28 03:25:16,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:25:16,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:25:16,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:25:17,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:25:17,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:25:17,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045600740] [2024-06-28 03:25:17,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045600740] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:25:17,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:25:17,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:25:17,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114890712] [2024-06-28 03:25:17,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:25:17,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:25:17,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:25:17,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:25:17,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:25:17,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:25:17,800 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 526 transitions, 6765 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:25:17,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:25:17,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:25:17,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:25:19,585 INFO L124 PetriNetUnfolderBase]: 4526/6953 cut-off events. [2024-06-28 03:25:19,585 INFO L125 PetriNetUnfolderBase]: For 951967/951969 co-relation queries the response was YES. [2024-06-28 03:25:19,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61486 conditions, 6953 events. 4526/6953 cut-off events. For 951967/951969 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 39515 event pairs, 1862 based on Foata normal form. 2/6954 useless extension candidates. Maximal degree in co-relation 61328. Up to 6776 conditions per place. [2024-06-28 03:25:19,680 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 481 selfloop transitions, 55 changer transitions 0/539 dead transitions. [2024-06-28 03:25:19,680 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 539 transitions, 7885 flow [2024-06-28 03:25:19,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:25:19,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:25:19,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-28 03:25:19,681 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38392857142857145 [2024-06-28 03:25:19,681 INFO L175 Difference]: Start difference. First operand has 355 places, 526 transitions, 6765 flow. Second operand 8 states and 129 transitions. [2024-06-28 03:25:19,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 539 transitions, 7885 flow [2024-06-28 03:25:21,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 539 transitions, 7745 flow, removed 39 selfloop flow, removed 5 redundant places. [2024-06-28 03:25:21,701 INFO L231 Difference]: Finished difference. Result has 358 places, 526 transitions, 6741 flow [2024-06-28 03:25:21,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6625, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=526, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=471, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6741, PETRI_PLACES=358, PETRI_TRANSITIONS=526} [2024-06-28 03:25:21,702 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 315 predicate places. [2024-06-28 03:25:21,702 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 526 transitions, 6741 flow [2024-06-28 03:25:21,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:25:21,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:25:21,703 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:25:21,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-28 03:25:21,703 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)] === [2024-06-28 03:25:21,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:25:21,703 INFO L85 PathProgramCache]: Analyzing trace with hash 1429963901, now seen corresponding path program 3 times [2024-06-28 03:25:21,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:25:21,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296670984] [2024-06-28 03:25:21,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:25:21,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:25:21,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:25:22,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:25:22,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:25:22,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296670984] [2024-06-28 03:25:22,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296670984] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:25:22,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:25:22,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:25:22,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987421566] [2024-06-28 03:25:22,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:25:22,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:25:22,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:25:22,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:25:22,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:25:22,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:25:22,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 526 transitions, 6741 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:25:22,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:25:22,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:25:22,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:25:24,339 INFO L124 PetriNetUnfolderBase]: 4541/6974 cut-off events. [2024-06-28 03:25:24,339 INFO L125 PetriNetUnfolderBase]: For 975076/975078 co-relation queries the response was YES. [2024-06-28 03:25:24,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61684 conditions, 6974 events. 4541/6974 cut-off events. For 975076/975078 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 39653 event pairs, 1867 based on Foata normal form. 5/6978 useless extension candidates. Maximal degree in co-relation 61525. Up to 6823 conditions per place. [2024-06-28 03:25:24,429 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 501 selfloop transitions, 42 changer transitions 0/546 dead transitions. [2024-06-28 03:25:24,429 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 546 transitions, 8100 flow [2024-06-28 03:25:24,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:25:24,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:25:24,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-28 03:25:24,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3898809523809524 [2024-06-28 03:25:24,431 INFO L175 Difference]: Start difference. First operand has 358 places, 526 transitions, 6741 flow. Second operand 8 states and 131 transitions. [2024-06-28 03:25:24,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 546 transitions, 8100 flow [2024-06-28 03:25:26,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 546 transitions, 7966 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-28 03:25:26,350 INFO L231 Difference]: Finished difference. Result has 358 places, 529 transitions, 6732 flow [2024-06-28 03:25:26,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6607, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=526, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=487, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6732, PETRI_PLACES=358, PETRI_TRANSITIONS=529} [2024-06-28 03:25:26,350 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 315 predicate places. [2024-06-28 03:25:26,350 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 529 transitions, 6732 flow [2024-06-28 03:25:26,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:25:26,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:25:26,351 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:25:26,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-28 03:25:26,351 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)] === [2024-06-28 03:25:26,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:25:26,351 INFO L85 PathProgramCache]: Analyzing trace with hash -2072350469, now seen corresponding path program 4 times [2024-06-28 03:25:26,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:25:26,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92225361] [2024-06-28 03:25:26,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:25:26,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:25:26,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:25:27,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:25:27,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:25:27,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92225361] [2024-06-28 03:25:27,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92225361] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:25:27,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:25:27,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:25:27,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133057358] [2024-06-28 03:25:27,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:25:27,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:25:27,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:25:27,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:25:27,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:25:27,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:25:27,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 529 transitions, 6732 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:25:27,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:25:27,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:25:27,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:25:29,023 INFO L124 PetriNetUnfolderBase]: 4532/6962 cut-off events. [2024-06-28 03:25:29,023 INFO L125 PetriNetUnfolderBase]: For 983904/983906 co-relation queries the response was YES. [2024-06-28 03:25:29,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61560 conditions, 6962 events. 4532/6962 cut-off events. For 983904/983906 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 39619 event pairs, 1850 based on Foata normal form. 5/6966 useless extension candidates. Maximal degree in co-relation 61400. Up to 6816 conditions per place. [2024-06-28 03:25:29,122 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 501 selfloop transitions, 41 changer transitions 0/545 dead transitions. [2024-06-28 03:25:29,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 545 transitions, 7876 flow [2024-06-28 03:25:29,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:25:29,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:25:29,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-28 03:25:29,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3898809523809524 [2024-06-28 03:25:29,124 INFO L175 Difference]: Start difference. First operand has 358 places, 529 transitions, 6732 flow. Second operand 8 states and 131 transitions. [2024-06-28 03:25:29,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 545 transitions, 7876 flow [2024-06-28 03:25:31,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 545 transitions, 7776 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-28 03:25:31,459 INFO L231 Difference]: Finished difference. Result has 361 places, 529 transitions, 6720 flow [2024-06-28 03:25:31,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6632, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=488, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6720, PETRI_PLACES=361, PETRI_TRANSITIONS=529} [2024-06-28 03:25:31,472 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 318 predicate places. [2024-06-28 03:25:31,472 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 529 transitions, 6720 flow [2024-06-28 03:25:31,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:25:31,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:25:31,473 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:25:31,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-28 03:25:31,480 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)] === [2024-06-28 03:25:31,480 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:25:31,480 INFO L85 PathProgramCache]: Analyzing trace with hash 1404946013, now seen corresponding path program 1 times [2024-06-28 03:25:31,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:25:31,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267377307] [2024-06-28 03:25:31,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:25:31,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:25:31,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:25:32,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:25:32,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:25:32,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267377307] [2024-06-28 03:25:32,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267377307] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:25:32,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:25:32,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:25:32,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350991690] [2024-06-28 03:25:32,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:25:32,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:25:32,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:25:32,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:25:32,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:25:32,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:25:32,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 529 transitions, 6720 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-28 03:25:32,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:25:32,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:25:32,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:25:34,103 INFO L124 PetriNetUnfolderBase]: 4448/6884 cut-off events. [2024-06-28 03:25:34,104 INFO L125 PetriNetUnfolderBase]: For 1014840/1014853 co-relation queries the response was YES. [2024-06-28 03:25:34,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61622 conditions, 6884 events. 4448/6884 cut-off events. For 1014840/1014853 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 39407 event pairs, 1339 based on Foata normal form. 6/6876 useless extension candidates. Maximal degree in co-relation 61461. Up to 6376 conditions per place. [2024-06-28 03:25:34,201 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 429 selfloop transitions, 120 changer transitions 0/567 dead transitions. [2024-06-28 03:25:34,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 567 transitions, 8230 flow [2024-06-28 03:25:34,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:25:34,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:25:34,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-28 03:25:34,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-28 03:25:34,202 INFO L175 Difference]: Start difference. First operand has 361 places, 529 transitions, 6720 flow. Second operand 9 states and 164 transitions. [2024-06-28 03:25:34,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 567 transitions, 8230 flow [2024-06-28 03:25:36,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 567 transitions, 8091 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-28 03:25:36,232 INFO L231 Difference]: Finished difference. Result has 363 places, 536 transitions, 6969 flow [2024-06-28 03:25:36,232 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6581, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=412, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6969, PETRI_PLACES=363, PETRI_TRANSITIONS=536} [2024-06-28 03:25:36,233 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 320 predicate places. [2024-06-28 03:25:36,233 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 536 transitions, 6969 flow [2024-06-28 03:25:36,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-28 03:25:36,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:25:36,233 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:25:36,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-28 03:25:36,233 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)] === [2024-06-28 03:25:36,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:25:36,234 INFO L85 PathProgramCache]: Analyzing trace with hash 841805689, now seen corresponding path program 2 times [2024-06-28 03:25:36,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:25:36,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735499932] [2024-06-28 03:25:36,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:25:36,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:25:36,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:25:37,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:25:37,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:25:37,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735499932] [2024-06-28 03:25:37,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735499932] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:25:37,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:25:37,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:25:37,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022478025] [2024-06-28 03:25:37,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:25:37,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:25:37,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:25:37,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:25:37,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:25:37,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:25:37,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 536 transitions, 6969 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-28 03:25:37,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:25:37,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:25:37,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:25:38,893 INFO L124 PetriNetUnfolderBase]: 4502/6972 cut-off events. [2024-06-28 03:25:38,893 INFO L125 PetriNetUnfolderBase]: For 1040415/1040426 co-relation queries the response was YES. [2024-06-28 03:25:38,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63050 conditions, 6972 events. 4502/6972 cut-off events. For 1040415/1040426 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 40358 event pairs, 1484 based on Foata normal form. 6/6968 useless extension candidates. Maximal degree in co-relation 62886. Up to 6508 conditions per place. [2024-06-28 03:25:38,987 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 434 selfloop transitions, 126 changer transitions 0/578 dead transitions. [2024-06-28 03:25:38,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 578 transitions, 8597 flow [2024-06-28 03:25:38,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:25:38,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:25:38,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-28 03:25:38,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4417989417989418 [2024-06-28 03:25:38,989 INFO L175 Difference]: Start difference. First operand has 363 places, 536 transitions, 6969 flow. Second operand 9 states and 167 transitions. [2024-06-28 03:25:38,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 578 transitions, 8597 flow [2024-06-28 03:25:41,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 578 transitions, 8315 flow, removed 78 selfloop flow, removed 5 redundant places. [2024-06-28 03:25:41,220 INFO L231 Difference]: Finished difference. Result has 368 places, 546 transitions, 7159 flow [2024-06-28 03:25:41,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6771, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=412, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7159, PETRI_PLACES=368, PETRI_TRANSITIONS=546} [2024-06-28 03:25:41,221 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 325 predicate places. [2024-06-28 03:25:41,221 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 546 transitions, 7159 flow [2024-06-28 03:25:41,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-28 03:25:41,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:25:41,221 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:25:41,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-28 03:25:41,222 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)] === [2024-06-28 03:25:41,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:25:41,222 INFO L85 PathProgramCache]: Analyzing trace with hash 856851539, now seen corresponding path program 1 times [2024-06-28 03:25:41,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:25:41,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034496631] [2024-06-28 03:25:41,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:25:41,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:25:41,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:25:41,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:25:41,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:25:41,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034496631] [2024-06-28 03:25:41,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034496631] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:25:41,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:25:41,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:25:41,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218652076] [2024-06-28 03:25:41,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:25:41,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:25:41,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:25:41,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:25:41,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:25:42,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:25:42,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 546 transitions, 7159 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:25:42,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:25:42,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:25:42,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:25:43,816 INFO L124 PetriNetUnfolderBase]: 4626/7105 cut-off events. [2024-06-28 03:25:43,816 INFO L125 PetriNetUnfolderBase]: For 1049310/1049312 co-relation queries the response was YES. [2024-06-28 03:25:43,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63946 conditions, 7105 events. 4626/7105 cut-off events. For 1049310/1049312 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 40540 event pairs, 1541 based on Foata normal form. 3/7107 useless extension candidates. Maximal degree in co-relation 63780. Up to 6742 conditions per place. [2024-06-28 03:25:43,909 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 459 selfloop transitions, 128 changer transitions 0/590 dead transitions. [2024-06-28 03:25:43,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 590 transitions, 8855 flow [2024-06-28 03:25:43,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:25:43,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:25:43,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-28 03:25:43,910 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41798941798941797 [2024-06-28 03:25:43,911 INFO L175 Difference]: Start difference. First operand has 368 places, 546 transitions, 7159 flow. Second operand 9 states and 158 transitions. [2024-06-28 03:25:43,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 590 transitions, 8855 flow [2024-06-28 03:25:46,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 590 transitions, 8704 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-28 03:25:46,428 INFO L231 Difference]: Finished difference. Result has 373 places, 563 transitions, 7521 flow [2024-06-28 03:25:46,428 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7008, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=546, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7521, PETRI_PLACES=373, PETRI_TRANSITIONS=563} [2024-06-28 03:25:46,429 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 330 predicate places. [2024-06-28 03:25:46,429 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 563 transitions, 7521 flow [2024-06-28 03:25:46,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:25:46,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:25:46,429 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:25:46,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-28 03:25:46,429 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)] === [2024-06-28 03:25:46,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:25:46,430 INFO L85 PathProgramCache]: Analyzing trace with hash 856841929, now seen corresponding path program 3 times [2024-06-28 03:25:46,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:25:46,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806930847] [2024-06-28 03:25:46,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:25:46,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:25:46,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:25:47,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:25:47,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:25:47,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806930847] [2024-06-28 03:25:47,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806930847] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:25:47,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:25:47,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:25:47,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76426456] [2024-06-28 03:25:47,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:25:47,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:25:47,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:25:47,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:25:47,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:25:47,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:25:47,306 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 563 transitions, 7521 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-28 03:25:47,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:25:47,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:25:47,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:25:49,034 INFO L124 PetriNetUnfolderBase]: 4530/7007 cut-off events. [2024-06-28 03:25:49,035 INFO L125 PetriNetUnfolderBase]: For 1077814/1077817 co-relation queries the response was YES. [2024-06-28 03:25:49,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64588 conditions, 7007 events. 4530/7007 cut-off events. For 1077814/1077817 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 40464 event pairs, 1481 based on Foata normal form. 4/7004 useless extension candidates. Maximal degree in co-relation 64419. Up to 6589 conditions per place. [2024-06-28 03:25:49,131 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 440 selfloop transitions, 124 changer transitions 0/589 dead transitions. [2024-06-28 03:25:49,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 589 transitions, 8773 flow [2024-06-28 03:25:49,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:25:49,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:25:49,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-28 03:25:49,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-28 03:25:49,133 INFO L175 Difference]: Start difference. First operand has 373 places, 563 transitions, 7521 flow. Second operand 9 states and 161 transitions. [2024-06-28 03:25:49,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 589 transitions, 8773 flow [2024-06-28 03:25:51,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 589 transitions, 8647 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-06-28 03:25:51,905 INFO L231 Difference]: Finished difference. Result has 378 places, 563 transitions, 7652 flow [2024-06-28 03:25:51,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7395, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=563, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=439, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7652, PETRI_PLACES=378, PETRI_TRANSITIONS=563} [2024-06-28 03:25:51,906 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 335 predicate places. [2024-06-28 03:25:51,906 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 563 transitions, 7652 flow [2024-06-28 03:25:51,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-28 03:25:51,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:25:51,907 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:25:51,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-28 03:25:51,907 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)] === [2024-06-28 03:25:51,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:25:51,907 INFO L85 PathProgramCache]: Analyzing trace with hash -1143665155, now seen corresponding path program 1 times [2024-06-28 03:25:51,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:25:51,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678479702] [2024-06-28 03:25:51,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:25:51,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:25:51,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:25:52,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:25:52,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:25:52,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678479702] [2024-06-28 03:25:52,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678479702] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:25:52,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:25:52,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:25:52,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388694503] [2024-06-28 03:25:52,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:25:52,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:25:52,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:25:52,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:25:52,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:25:52,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:25:52,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 563 transitions, 7652 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:25:52,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:25:52,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:25:52,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:25:54,420 INFO L124 PetriNetUnfolderBase]: 4559/7048 cut-off events. [2024-06-28 03:25:54,421 INFO L125 PetriNetUnfolderBase]: For 1110795/1110798 co-relation queries the response was YES. [2024-06-28 03:25:54,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65722 conditions, 7048 events. 4559/7048 cut-off events. For 1110795/1110798 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 40779 event pairs, 1481 based on Foata normal form. 3/7044 useless extension candidates. Maximal degree in co-relation 65551. Up to 6661 conditions per place. [2024-06-28 03:25:54,519 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 489 selfloop transitions, 101 changer transitions 0/615 dead transitions. [2024-06-28 03:25:54,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 615 transitions, 9882 flow [2024-06-28 03:25:54,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 03:25:54,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 03:25:54,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 198 transitions. [2024-06-28 03:25:54,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-28 03:25:54,520 INFO L175 Difference]: Start difference. First operand has 378 places, 563 transitions, 7652 flow. Second operand 11 states and 198 transitions. [2024-06-28 03:25:54,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 615 transitions, 9882 flow [2024-06-28 03:25:57,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 615 transitions, 9639 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-28 03:25:57,503 INFO L231 Difference]: Finished difference. Result has 383 places, 580 transitions, 7985 flow [2024-06-28 03:25:57,504 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7409, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=563, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=474, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7985, PETRI_PLACES=383, PETRI_TRANSITIONS=580} [2024-06-28 03:25:57,504 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 340 predicate places. [2024-06-28 03:25:57,504 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 580 transitions, 7985 flow [2024-06-28 03:25:57,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:25:57,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:25:57,504 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:25:57,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-28 03:25:57,505 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)] === [2024-06-28 03:25:57,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:25:57,505 INFO L85 PathProgramCache]: Analyzing trace with hash -751702915, now seen corresponding path program 2 times [2024-06-28 03:25:57,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:25:57,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957115489] [2024-06-28 03:25:57,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:25:57,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:25:57,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:25:58,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:25:58,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:25:58,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957115489] [2024-06-28 03:25:58,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957115489] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:25:58,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:25:58,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:25:58,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713252042] [2024-06-28 03:25:58,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:25:58,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:25:58,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:25:58,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:25:58,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:25:58,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:25:58,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 580 transitions, 7985 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:25:58,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:25:58,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:25:58,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:26:00,269 INFO L124 PetriNetUnfolderBase]: 4556/7044 cut-off events. [2024-06-28 03:26:00,269 INFO L125 PetriNetUnfolderBase]: For 1131634/1131637 co-relation queries the response was YES. [2024-06-28 03:26:00,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66212 conditions, 7044 events. 4556/7044 cut-off events. For 1131634/1131637 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 40756 event pairs, 1477 based on Foata normal form. 3/7040 useless extension candidates. Maximal degree in co-relation 66039. Up to 6658 conditions per place. [2024-06-28 03:26:00,371 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 483 selfloop transitions, 106 changer transitions 0/614 dead transitions. [2024-06-28 03:26:00,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 614 transitions, 9687 flow [2024-06-28 03:26:00,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 03:26:00,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 03:26:00,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 206 transitions. [2024-06-28 03:26:00,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4087301587301587 [2024-06-28 03:26:00,372 INFO L175 Difference]: Start difference. First operand has 383 places, 580 transitions, 7985 flow. Second operand 12 states and 206 transitions. [2024-06-28 03:26:00,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 614 transitions, 9687 flow [2024-06-28 03:26:03,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 614 transitions, 9451 flow, removed 98 selfloop flow, removed 4 redundant places. [2024-06-28 03:26:03,124 INFO L231 Difference]: Finished difference. Result has 391 places, 580 transitions, 7969 flow [2024-06-28 03:26:03,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7749, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=580, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=474, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7969, PETRI_PLACES=391, PETRI_TRANSITIONS=580} [2024-06-28 03:26:03,125 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 348 predicate places. [2024-06-28 03:26:03,125 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 580 transitions, 7969 flow [2024-06-28 03:26:03,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:26:03,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:26:03,125 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:26:03,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-28 03:26:03,125 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)] === [2024-06-28 03:26:03,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:26:03,126 INFO L85 PathProgramCache]: Analyzing trace with hash -568481767, now seen corresponding path program 3 times [2024-06-28 03:26:03,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:26:03,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008171646] [2024-06-28 03:26:03,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:26:03,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:26:03,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:26:03,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:26:03,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:26:03,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008171646] [2024-06-28 03:26:03,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008171646] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:26:03,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:26:03,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:26:03,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613174526] [2024-06-28 03:26:03,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:26:03,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:26:03,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:26:03,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:26:03,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:26:04,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:26:04,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 580 transitions, 7969 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:26:04,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:26:04,066 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:26:04,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:26:05,825 INFO L124 PetriNetUnfolderBase]: 4579/7076 cut-off events. [2024-06-28 03:26:05,825 INFO L125 PetriNetUnfolderBase]: For 1155966/1155968 co-relation queries the response was YES. [2024-06-28 03:26:05,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66532 conditions, 7076 events. 4579/7076 cut-off events. For 1155966/1155968 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 40905 event pairs, 1357 based on Foata normal form. 4/7079 useless extension candidates. Maximal degree in co-relation 66358. Up to 6729 conditions per place. [2024-06-28 03:26:05,942 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 501 selfloop transitions, 94 changer transitions 0/620 dead transitions. [2024-06-28 03:26:05,942 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 620 transitions, 9643 flow [2024-06-28 03:26:05,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:26:05,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:26:05,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-28 03:26:05,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-28 03:26:05,943 INFO L175 Difference]: Start difference. First operand has 391 places, 580 transitions, 7969 flow. Second operand 9 states and 164 transitions. [2024-06-28 03:26:05,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 620 transitions, 9643 flow [2024-06-28 03:26:08,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 620 transitions, 9395 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-28 03:26:09,008 INFO L231 Difference]: Finished difference. Result has 393 places, 595 transitions, 8166 flow [2024-06-28 03:26:09,008 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7763, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=580, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=489, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8166, PETRI_PLACES=393, PETRI_TRANSITIONS=595} [2024-06-28 03:26:09,009 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 350 predicate places. [2024-06-28 03:26:09,009 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 595 transitions, 8166 flow [2024-06-28 03:26:09,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:26:09,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:26:09,009 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:26:09,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-28 03:26:09,010 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)] === [2024-06-28 03:26:09,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:26:09,010 INFO L85 PathProgramCache]: Analyzing trace with hash -562767847, now seen corresponding path program 4 times [2024-06-28 03:26:09,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:26:09,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442983359] [2024-06-28 03:26:09,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:26:09,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:26:09,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:26:09,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:26:09,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:26:09,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442983359] [2024-06-28 03:26:09,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442983359] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:26:09,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:26:09,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:26:09,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271887773] [2024-06-28 03:26:09,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:26:09,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:26:09,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:26:09,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:26:09,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:26:10,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:26:10,014 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 595 transitions, 8166 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:26:10,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:26:10,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:26:10,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:26:11,944 INFO L124 PetriNetUnfolderBase]: 4584/7083 cut-off events. [2024-06-28 03:26:11,944 INFO L125 PetriNetUnfolderBase]: For 1174138/1174140 co-relation queries the response was YES. [2024-06-28 03:26:12,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66823 conditions, 7083 events. 4584/7083 cut-off events. For 1174138/1174140 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 40955 event pairs, 1351 based on Foata normal form. 3/7085 useless extension candidates. Maximal degree in co-relation 66647. Up to 6735 conditions per place. [2024-06-28 03:26:12,051 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 500 selfloop transitions, 100 changer transitions 0/625 dead transitions. [2024-06-28 03:26:12,051 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 625 transitions, 9712 flow [2024-06-28 03:26:12,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 03:26:12,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 03:26:12,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 190 transitions. [2024-06-28 03:26:12,053 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41125541125541126 [2024-06-28 03:26:12,053 INFO L175 Difference]: Start difference. First operand has 393 places, 595 transitions, 8166 flow. Second operand 11 states and 190 transitions. [2024-06-28 03:26:12,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 625 transitions, 9712 flow [2024-06-28 03:26:14,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 625 transitions, 9582 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-28 03:26:14,947 INFO L231 Difference]: Finished difference. Result has 399 places, 598 transitions, 8299 flow [2024-06-28 03:26:14,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8036, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=595, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=498, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8299, PETRI_PLACES=399, PETRI_TRANSITIONS=598} [2024-06-28 03:26:14,948 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 356 predicate places. [2024-06-28 03:26:14,948 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 598 transitions, 8299 flow [2024-06-28 03:26:14,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:26:14,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:26:14,948 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:26:14,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-28 03:26:14,949 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)] === [2024-06-28 03:26:14,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:26:14,949 INFO L85 PathProgramCache]: Analyzing trace with hash -453011851, now seen corresponding path program 1 times [2024-06-28 03:26:14,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:26:14,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776420796] [2024-06-28 03:26:14,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:26:14,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:26:14,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:26:15,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:26:15,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:26:15,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776420796] [2024-06-28 03:26:15,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776420796] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:26:15,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:26:15,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:26:15,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255155742] [2024-06-28 03:26:15,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:26:15,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:26:15,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:26:15,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:26:15,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:26:15,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:26:15,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 598 transitions, 8299 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:26:15,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:26:15,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:26:15,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:26:17,714 INFO L124 PetriNetUnfolderBase]: 4615/7118 cut-off events. [2024-06-28 03:26:17,714 INFO L125 PetriNetUnfolderBase]: For 1202477/1202481 co-relation queries the response was YES. [2024-06-28 03:26:17,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67597 conditions, 7118 events. 4615/7118 cut-off events. For 1202477/1202481 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 41056 event pairs, 1414 based on Foata normal form. 4/7121 useless extension candidates. Maximal degree in co-relation 67419. Up to 6774 conditions per place. [2024-06-28 03:26:17,824 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 566 selfloop transitions, 55 changer transitions 0/646 dead transitions. [2024-06-28 03:26:17,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 646 transitions, 9961 flow [2024-06-28 03:26:17,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:26:17,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:26:17,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-28 03:26:17,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-28 03:26:17,825 INFO L175 Difference]: Start difference. First operand has 399 places, 598 transitions, 8299 flow. Second operand 9 states and 164 transitions. [2024-06-28 03:26:17,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 646 transitions, 9961 flow [2024-06-28 03:26:20,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 646 transitions, 9733 flow, removed 14 selfloop flow, removed 9 redundant places. [2024-06-28 03:26:20,286 INFO L231 Difference]: Finished difference. Result has 401 places, 618 transitions, 8551 flow [2024-06-28 03:26:20,286 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8071, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=598, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=546, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8551, PETRI_PLACES=401, PETRI_TRANSITIONS=618} [2024-06-28 03:26:20,286 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 358 predicate places. [2024-06-28 03:26:20,286 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 618 transitions, 8551 flow [2024-06-28 03:26:20,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:26:20,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:26:20,287 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:26:20,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-28 03:26:20,287 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)] === [2024-06-28 03:26:20,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:26:20,287 INFO L85 PathProgramCache]: Analyzing trace with hash -453190597, now seen corresponding path program 5 times [2024-06-28 03:26:20,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:26:20,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906141948] [2024-06-28 03:26:20,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:26:20,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:26:20,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:26:21,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:26:21,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:26:21,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906141948] [2024-06-28 03:26:21,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906141948] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:26:21,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:26:21,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:26:21,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366019730] [2024-06-28 03:26:21,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:26:21,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:26:21,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:26:21,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:26:21,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:26:21,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:26:21,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 618 transitions, 8551 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:26:21,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:26:21,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:26:21,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:26:23,220 INFO L124 PetriNetUnfolderBase]: 4636/7147 cut-off events. [2024-06-28 03:26:23,221 INFO L125 PetriNetUnfolderBase]: For 1232447/1232451 co-relation queries the response was YES. [2024-06-28 03:26:23,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69172 conditions, 7147 events. 4636/7147 cut-off events. For 1232447/1232451 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 41238 event pairs, 1313 based on Foata normal form. 5/7151 useless extension candidates. Maximal degree in co-relation 68991. Up to 6608 conditions per place. [2024-06-28 03:26:23,335 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 476 selfloop transitions, 161 changer transitions 0/662 dead transitions. [2024-06-28 03:26:23,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 662 transitions, 11083 flow [2024-06-28 03:26:23,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:26:23,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:26:23,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-28 03:26:23,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4497354497354497 [2024-06-28 03:26:23,337 INFO L175 Difference]: Start difference. First operand has 401 places, 618 transitions, 8551 flow. Second operand 9 states and 170 transitions. [2024-06-28 03:26:23,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 662 transitions, 11083 flow [2024-06-28 03:26:26,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 662 transitions, 10940 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-28 03:26:26,318 INFO L231 Difference]: Finished difference. Result has 406 places, 633 transitions, 9129 flow [2024-06-28 03:26:26,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8408, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=618, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=468, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9129, PETRI_PLACES=406, PETRI_TRANSITIONS=633} [2024-06-28 03:26:26,319 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 363 predicate places. [2024-06-28 03:26:26,319 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 633 transitions, 9129 flow [2024-06-28 03:26:26,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:26:26,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:26:26,319 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:26:26,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-28 03:26:26,319 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)] === [2024-06-28 03:26:26,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:26:26,320 INFO L85 PathProgramCache]: Analyzing trace with hash -452891695, now seen corresponding path program 1 times [2024-06-28 03:26:26,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:26:26,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790798400] [2024-06-28 03:26:26,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:26:26,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:26:26,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:26:27,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:26:27,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:26:27,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790798400] [2024-06-28 03:26:27,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790798400] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:26:27,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:26:27,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:26:27,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759809328] [2024-06-28 03:26:27,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:26:27,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:26:27,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:26:27,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:26:27,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:26:27,155 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:26:27,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 633 transitions, 9129 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:26:27,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:26:27,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:26:27,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:26:29,038 INFO L124 PetriNetUnfolderBase]: 4753/7272 cut-off events. [2024-06-28 03:26:29,038 INFO L125 PetriNetUnfolderBase]: For 1267631/1267635 co-relation queries the response was YES. [2024-06-28 03:26:29,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71054 conditions, 7272 events. 4753/7272 cut-off events. For 1267631/1267635 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 41534 event pairs, 1543 based on Foata normal form. 5/7276 useless extension candidates. Maximal degree in co-relation 70870. Up to 7033 conditions per place. [2024-06-28 03:26:29,155 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 580 selfloop transitions, 88 changer transitions 0/671 dead transitions. [2024-06-28 03:26:29,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 671 transitions, 11396 flow [2024-06-28 03:26:29,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:26:29,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:26:29,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-28 03:26:29,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41798941798941797 [2024-06-28 03:26:29,157 INFO L175 Difference]: Start difference. First operand has 406 places, 633 transitions, 9129 flow. Second operand 9 states and 158 transitions. [2024-06-28 03:26:29,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 671 transitions, 11396 flow [2024-06-28 03:26:32,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 671 transitions, 11153 flow, removed 86 selfloop flow, removed 3 redundant places. [2024-06-28 03:26:32,836 INFO L231 Difference]: Finished difference. Result has 412 places, 646 transitions, 9299 flow [2024-06-28 03:26:32,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8902, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=633, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=555, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9299, PETRI_PLACES=412, PETRI_TRANSITIONS=646} [2024-06-28 03:26:32,837 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 369 predicate places. [2024-06-28 03:26:32,837 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 646 transitions, 9299 flow [2024-06-28 03:26:32,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:26:32,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:26:32,844 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:26:32,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-28 03:26:32,845 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)] === [2024-06-28 03:26:32,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:26:32,845 INFO L85 PathProgramCache]: Analyzing trace with hash 1306475483, now seen corresponding path program 2 times [2024-06-28 03:26:32,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:26:32,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522134277] [2024-06-28 03:26:32,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:26:32,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:26:32,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:26:33,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:26:33,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:26:33,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522134277] [2024-06-28 03:26:33,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522134277] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:26:33,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:26:33,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:26:33,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368635187] [2024-06-28 03:26:33,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:26:33,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:26:33,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:26:33,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:26:33,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:26:33,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:26:33,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 646 transitions, 9299 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:26:33,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:26:33,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:26:33,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:26:35,740 INFO L124 PetriNetUnfolderBase]: 4705/7240 cut-off events. [2024-06-28 03:26:35,740 INFO L125 PetriNetUnfolderBase]: For 1319016/1319020 co-relation queries the response was YES. [2024-06-28 03:26:35,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71721 conditions, 7240 events. 4705/7240 cut-off events. For 1319016/1319020 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 41750 event pairs, 1462 based on Foata normal form. 4/7243 useless extension candidates. Maximal degree in co-relation 71535. Up to 6766 conditions per place. [2024-06-28 03:26:35,863 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 570 selfloop transitions, 95 changer transitions 0/694 dead transitions. [2024-06-28 03:26:35,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 694 transitions, 11670 flow [2024-06-28 03:26:35,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:26:35,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:26:35,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-28 03:26:35,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-28 03:26:35,865 INFO L175 Difference]: Start difference. First operand has 412 places, 646 transitions, 9299 flow. Second operand 9 states and 171 transitions. [2024-06-28 03:26:35,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 694 transitions, 11670 flow [2024-06-28 03:26:39,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 694 transitions, 11543 flow, removed 50 selfloop flow, removed 3 redundant places. [2024-06-28 03:26:39,730 INFO L231 Difference]: Finished difference. Result has 420 places, 665 transitions, 9755 flow [2024-06-28 03:26:39,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9180, PETRI_DIFFERENCE_MINUEND_PLACES=409, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=646, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=560, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9755, PETRI_PLACES=420, PETRI_TRANSITIONS=665} [2024-06-28 03:26:39,731 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 377 predicate places. [2024-06-28 03:26:39,732 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 665 transitions, 9755 flow [2024-06-28 03:26:39,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:26:39,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:26:39,732 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:26:39,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-28 03:26:39,732 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)] === [2024-06-28 03:26:39,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:26:39,733 INFO L85 PathProgramCache]: Analyzing trace with hash 1306475297, now seen corresponding path program 6 times [2024-06-28 03:26:39,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:26:39,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688514738] [2024-06-28 03:26:39,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:26:39,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:26:39,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:26:40,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:26:40,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:26:40,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688514738] [2024-06-28 03:26:40,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688514738] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:26:40,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:26:40,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:26:40,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980407174] [2024-06-28 03:26:40,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:26:40,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:26:40,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:26:40,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:26:40,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:26:40,617 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:26:40,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 665 transitions, 9755 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:26:40,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:26:40,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:26:40,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:26:42,730 INFO L124 PetriNetUnfolderBase]: 4710/7246 cut-off events. [2024-06-28 03:26:42,730 INFO L125 PetriNetUnfolderBase]: For 1343883/1343887 co-relation queries the response was YES. [2024-06-28 03:26:42,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73169 conditions, 7246 events. 4710/7246 cut-off events. For 1343883/1343887 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 41817 event pairs, 1300 based on Foata normal form. 5/7250 useless extension candidates. Maximal degree in co-relation 72979. Up to 6703 conditions per place. [2024-06-28 03:26:42,853 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 497 selfloop transitions, 167 changer transitions 0/693 dead transitions. [2024-06-28 03:26:42,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 693 transitions, 11843 flow [2024-06-28 03:26:42,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:26:42,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:26:42,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-28 03:26:42,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-28 03:26:42,854 INFO L175 Difference]: Start difference. First operand has 420 places, 665 transitions, 9755 flow. Second operand 9 states and 166 transitions. [2024-06-28 03:26:42,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 693 transitions, 11843 flow [2024-06-28 03:26:47,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 693 transitions, 11737 flow, removed 48 selfloop flow, removed 2 redundant places. [2024-06-28 03:26:47,515 INFO L231 Difference]: Finished difference. Result has 427 places, 668 transitions, 10031 flow [2024-06-28 03:26:47,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9649, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=665, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=501, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10031, PETRI_PLACES=427, PETRI_TRANSITIONS=668} [2024-06-28 03:26:47,516 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 384 predicate places. [2024-06-28 03:26:47,516 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 668 transitions, 10031 flow [2024-06-28 03:26:47,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:26:47,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:26:47,516 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:26:47,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-28 03:26:47,517 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)] === [2024-06-28 03:26:47,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:26:47,517 INFO L85 PathProgramCache]: Analyzing trace with hash 251299545, now seen corresponding path program 2 times [2024-06-28 03:26:47,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:26:47,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829909999] [2024-06-28 03:26:47,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:26:47,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:26:47,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:26:48,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:26:48,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:26:48,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829909999] [2024-06-28 03:26:48,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829909999] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:26:48,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:26:48,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:26:48,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059866379] [2024-06-28 03:26:48,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:26:48,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:26:48,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:26:48,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:26:48,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:26:48,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:26:48,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 668 transitions, 10031 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:26:48,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:26:48,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:26:48,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:26:50,605 INFO L124 PetriNetUnfolderBase]: 4805/7345 cut-off events. [2024-06-28 03:26:50,605 INFO L125 PetriNetUnfolderBase]: For 1365627/1365631 co-relation queries the response was YES. [2024-06-28 03:26:50,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74105 conditions, 7345 events. 4805/7345 cut-off events. For 1365627/1365631 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 42022 event pairs, 1525 based on Foata normal form. 5/7349 useless extension candidates. Maximal degree in co-relation 73912. Up to 7104 conditions per place. [2024-06-28 03:26:50,710 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 594 selfloop transitions, 95 changer transitions 0/692 dead transitions. [2024-06-28 03:26:50,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 692 transitions, 11937 flow [2024-06-28 03:26:50,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:26:50,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:26:50,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-28 03:26:50,711 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4021164021164021 [2024-06-28 03:26:50,712 INFO L175 Difference]: Start difference. First operand has 427 places, 668 transitions, 10031 flow. Second operand 9 states and 152 transitions. [2024-06-28 03:26:50,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 692 transitions, 11937 flow [2024-06-28 03:26:54,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 692 transitions, 11738 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-28 03:26:54,601 INFO L231 Difference]: Finished difference. Result has 432 places, 671 transitions, 10062 flow [2024-06-28 03:26:54,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9832, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=668, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=576, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10062, PETRI_PLACES=432, PETRI_TRANSITIONS=671} [2024-06-28 03:26:54,602 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 389 predicate places. [2024-06-28 03:26:54,602 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 671 transitions, 10062 flow [2024-06-28 03:26:54,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:26:54,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:26:54,602 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:26:54,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-28 03:26:54,603 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)] === [2024-06-28 03:26:54,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:26:54,603 INFO L85 PathProgramCache]: Analyzing trace with hash -275760175, now seen corresponding path program 3 times [2024-06-28 03:26:54,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:26:54,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131080158] [2024-06-28 03:26:54,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:26:54,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:26:54,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:26:55,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:26:55,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:26:55,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131080158] [2024-06-28 03:26:55,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131080158] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:26:55,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:26:55,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:26:55,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818785780] [2024-06-28 03:26:55,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:26:55,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:26:55,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:26:55,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:26:55,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:26:55,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:26:55,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 671 transitions, 10062 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:26:55,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:26:55,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:26:55,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:26:57,661 INFO L124 PetriNetUnfolderBase]: 4802/7341 cut-off events. [2024-06-28 03:26:57,662 INFO L125 PetriNetUnfolderBase]: For 1385629/1385633 co-relation queries the response was YES. [2024-06-28 03:26:57,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74071 conditions, 7341 events. 4802/7341 cut-off events. For 1385629/1385633 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 41982 event pairs, 1540 based on Foata normal form. 5/7345 useless extension candidates. Maximal degree in co-relation 73877. Up to 7101 conditions per place. [2024-06-28 03:26:57,777 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 597 selfloop transitions, 92 changer transitions 0/692 dead transitions. [2024-06-28 03:26:57,777 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 692 transitions, 11938 flow [2024-06-28 03:26:57,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:26:57,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:26:57,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-28 03:26:57,778 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-28 03:26:57,778 INFO L175 Difference]: Start difference. First operand has 432 places, 671 transitions, 10062 flow. Second operand 9 states and 153 transitions. [2024-06-28 03:26:57,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 692 transitions, 11938 flow [2024-06-28 03:27:01,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 692 transitions, 11710 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-28 03:27:01,564 INFO L231 Difference]: Finished difference. Result has 435 places, 671 transitions, 10024 flow [2024-06-28 03:27:01,564 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9834, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=671, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=579, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10024, PETRI_PLACES=435, PETRI_TRANSITIONS=671} [2024-06-28 03:27:01,565 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 392 predicate places. [2024-06-28 03:27:01,565 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 671 transitions, 10024 flow [2024-06-28 03:27:01,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:27:01,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:27:01,565 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:27:01,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-28 03:27:01,565 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)] === [2024-06-28 03:27:01,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:27:01,566 INFO L85 PathProgramCache]: Analyzing trace with hash -275760361, now seen corresponding path program 3 times [2024-06-28 03:27:01,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:27:01,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339093649] [2024-06-28 03:27:01,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:27:01,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:27:01,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:27:02,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:27:02,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:27:02,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339093649] [2024-06-28 03:27:02,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339093649] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:27:02,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:27:02,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:27:02,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500788656] [2024-06-28 03:27:02,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:27:02,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:27:02,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:27:02,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:27:02,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:27:02,467 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:27:02,467 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 671 transitions, 10024 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:27:02,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:27:02,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:27:02,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:27:04,592 INFO L124 PetriNetUnfolderBase]: 4706/7244 cut-off events. [2024-06-28 03:27:04,593 INFO L125 PetriNetUnfolderBase]: For 1408576/1408580 co-relation queries the response was YES. [2024-06-28 03:27:04,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73602 conditions, 7244 events. 4706/7244 cut-off events. For 1408576/1408580 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 41802 event pairs, 1446 based on Foata normal form. 4/7247 useless extension candidates. Maximal degree in co-relation 73407. Up to 6770 conditions per place. [2024-06-28 03:27:04,724 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 566 selfloop transitions, 99 changer transitions 0/695 dead transitions. [2024-06-28 03:27:04,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 695 transitions, 11886 flow [2024-06-28 03:27:04,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:27:04,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:27:04,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-28 03:27:04,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-28 03:27:04,725 INFO L175 Difference]: Start difference. First operand has 435 places, 671 transitions, 10024 flow. Second operand 9 states and 164 transitions. [2024-06-28 03:27:04,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 695 transitions, 11886 flow [2024-06-28 03:27:08,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 695 transitions, 11685 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-28 03:27:08,663 INFO L231 Difference]: Finished difference. Result has 437 places, 671 transitions, 10027 flow [2024-06-28 03:27:08,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9823, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=671, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=572, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10027, PETRI_PLACES=437, PETRI_TRANSITIONS=671} [2024-06-28 03:27:08,663 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 394 predicate places. [2024-06-28 03:27:08,663 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 671 transitions, 10027 flow [2024-06-28 03:27:08,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:27:08,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:27:08,664 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:27:08,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-28 03:27:08,664 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)] === [2024-06-28 03:27:08,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:27:08,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1311116927, now seen corresponding path program 7 times [2024-06-28 03:27:08,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:27:08,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485525886] [2024-06-28 03:27:08,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:27:08,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:27:08,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:27:09,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:27:09,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:27:09,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485525886] [2024-06-28 03:27:09,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485525886] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:27:09,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:27:09,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:27:09,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008860515] [2024-06-28 03:27:09,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:27:09,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:27:09,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:27:09,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:27:09,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:27:09,413 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:27:09,413 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 671 transitions, 10027 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:27:09,413 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:27:09,413 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:27:09,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:27:11,510 INFO L124 PetriNetUnfolderBase]: 4703/7239 cut-off events. [2024-06-28 03:27:11,511 INFO L125 PetriNetUnfolderBase]: For 1423380/1423384 co-relation queries the response was YES. [2024-06-28 03:27:11,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73753 conditions, 7239 events. 4703/7239 cut-off events. For 1423380/1423384 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 41823 event pairs, 1316 based on Foata normal form. 5/7243 useless extension candidates. Maximal degree in co-relation 73557. Up to 6694 conditions per place. [2024-06-28 03:27:11,646 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 492 selfloop transitions, 171 changer transitions 0/693 dead transitions. [2024-06-28 03:27:11,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 693 transitions, 12073 flow [2024-06-28 03:27:11,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:27:11,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:27:11,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-28 03:27:11,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-28 03:27:11,648 INFO L175 Difference]: Start difference. First operand has 437 places, 671 transitions, 10027 flow. Second operand 9 states and 162 transitions. [2024-06-28 03:27:11,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 693 transitions, 12073 flow [2024-06-28 03:27:15,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 693 transitions, 11844 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-28 03:27:15,294 INFO L231 Difference]: Finished difference. Result has 439 places, 671 transitions, 10146 flow [2024-06-28 03:27:15,295 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9798, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=671, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=500, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10146, PETRI_PLACES=439, PETRI_TRANSITIONS=671} [2024-06-28 03:27:15,295 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 396 predicate places. [2024-06-28 03:27:15,295 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 671 transitions, 10146 flow [2024-06-28 03:27:15,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:27:15,295 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:27:15,295 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:27:15,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-28 03:27:15,296 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)] === [2024-06-28 03:27:15,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:27:15,296 INFO L85 PathProgramCache]: Analyzing trace with hash -275880517, now seen corresponding path program 8 times [2024-06-28 03:27:15,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:27:15,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542476692] [2024-06-28 03:27:15,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:27:15,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:27:15,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:27:16,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:27:16,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:27:16,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542476692] [2024-06-28 03:27:16,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542476692] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:27:16,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:27:16,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:27:16,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33619413] [2024-06-28 03:27:16,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:27:16,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:27:16,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:27:16,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:27:16,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:27:16,174 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:27:16,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 671 transitions, 10146 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:27:16,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:27:16,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:27:16,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:27:18,308 INFO L124 PetriNetUnfolderBase]: 4700/7243 cut-off events. [2024-06-28 03:27:18,309 INFO L125 PetriNetUnfolderBase]: For 1443163/1443165 co-relation queries the response was YES. [2024-06-28 03:27:18,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73922 conditions, 7243 events. 4700/7243 cut-off events. For 1443163/1443165 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 41928 event pairs, 1313 based on Foata normal form. 3/7245 useless extension candidates. Maximal degree in co-relation 73725. Up to 6927 conditions per place. [2024-06-28 03:27:18,437 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 583 selfloop transitions, 77 changer transitions 0/690 dead transitions. [2024-06-28 03:27:18,437 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 690 transitions, 11544 flow [2024-06-28 03:27:18,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:27:18,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:27:18,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-28 03:27:18,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2024-06-28 03:27:18,438 INFO L175 Difference]: Start difference. First operand has 439 places, 671 transitions, 10146 flow. Second operand 9 states and 154 transitions. [2024-06-28 03:27:18,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 690 transitions, 11544 flow [2024-06-28 03:27:21,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 690 transitions, 11224 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-28 03:27:21,824 INFO L231 Difference]: Finished difference. Result has 442 places, 671 transitions, 9987 flow [2024-06-28 03:27:21,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9826, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=671, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=594, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9987, PETRI_PLACES=442, PETRI_TRANSITIONS=671} [2024-06-28 03:27:21,824 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 399 predicate places. [2024-06-28 03:27:21,825 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 671 transitions, 9987 flow [2024-06-28 03:27:21,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:27:21,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:27:21,825 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:27:21,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-28 03:27:21,825 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)] === [2024-06-28 03:27:21,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:27:21,826 INFO L85 PathProgramCache]: Analyzing trace with hash -494632369, now seen corresponding path program 4 times [2024-06-28 03:27:21,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:27:21,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502447704] [2024-06-28 03:27:21,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:27:21,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:27:21,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:27:22,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:27:22,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:27:22,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502447704] [2024-06-28 03:27:22,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502447704] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:27:22,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:27:22,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:27:22,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553370686] [2024-06-28 03:27:22,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:27:22,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:27:22,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:27:22,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:27:22,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:27:22,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:27:22,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 671 transitions, 9987 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-28 03:27:22,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:27:22,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:27:22,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:27:25,182 INFO L124 PetriNetUnfolderBase]: 4785/7376 cut-off events. [2024-06-28 03:27:25,182 INFO L125 PetriNetUnfolderBase]: For 1486830/1486832 co-relation queries the response was YES. [2024-06-28 03:27:25,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74732 conditions, 7376 events. 4785/7376 cut-off events. For 1486830/1486832 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 42919 event pairs, 1322 based on Foata normal form. 4/7379 useless extension candidates. Maximal degree in co-relation 74535. Up to 6925 conditions per place. [2024-06-28 03:27:25,303 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 575 selfloop transitions, 116 changer transitions 0/721 dead transitions. [2024-06-28 03:27:25,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 451 places, 721 transitions, 11896 flow [2024-06-28 03:27:25,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:27:25,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:27:25,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 183 transitions. [2024-06-28 03:27:25,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4357142857142857 [2024-06-28 03:27:25,304 INFO L175 Difference]: Start difference. First operand has 442 places, 671 transitions, 9987 flow. Second operand 10 states and 183 transitions. [2024-06-28 03:27:25,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 451 places, 721 transitions, 11896 flow [2024-06-28 03:27:28,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 721 transitions, 11706 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-28 03:27:28,667 INFO L231 Difference]: Finished difference. Result has 444 places, 687 transitions, 10265 flow [2024-06-28 03:27:28,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9797, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=671, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=557, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10265, PETRI_PLACES=444, PETRI_TRANSITIONS=687} [2024-06-28 03:27:28,668 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 401 predicate places. [2024-06-28 03:27:28,668 INFO L495 AbstractCegarLoop]: Abstraction has has 444 places, 687 transitions, 10265 flow [2024-06-28 03:27:28,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-28 03:27:28,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:27:28,668 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:27:28,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-28 03:27:28,668 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)] === [2024-06-28 03:27:28,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:27:28,669 INFO L85 PathProgramCache]: Analyzing trace with hash -571102383, now seen corresponding path program 2 times [2024-06-28 03:27:28,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:27:28,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695648256] [2024-06-28 03:27:28,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:27:28,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:27:28,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:27:29,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:27:29,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:27:29,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695648256] [2024-06-28 03:27:29,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695648256] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:27:29,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:27:29,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:27:29,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606962021] [2024-06-28 03:27:29,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:27:29,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:27:29,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:27:29,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:27:29,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:27:29,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:27:29,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 444 places, 687 transitions, 10265 flow. Second operand has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:27:29,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:27:29,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:27:29,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:27:32,074 INFO L124 PetriNetUnfolderBase]: 4903/7507 cut-off events. [2024-06-28 03:27:32,074 INFO L125 PetriNetUnfolderBase]: For 1509299/1509301 co-relation queries the response was YES. [2024-06-28 03:27:32,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75998 conditions, 7507 events. 4903/7507 cut-off events. For 1509299/1509301 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 43286 event pairs, 1390 based on Foata normal form. 3/7509 useless extension candidates. Maximal degree in co-relation 75799. Up to 7212 conditions per place. [2024-06-28 03:27:32,204 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 603 selfloop transitions, 124 changer transitions 0/730 dead transitions. [2024-06-28 03:27:32,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 730 transitions, 12230 flow [2024-06-28 03:27:32,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:27:32,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:27:32,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 174 transitions. [2024-06-28 03:27:32,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4142857142857143 [2024-06-28 03:27:32,214 INFO L175 Difference]: Start difference. First operand has 444 places, 687 transitions, 10265 flow. Second operand 10 states and 174 transitions. [2024-06-28 03:27:32,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 730 transitions, 12230 flow [2024-06-28 03:27:36,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 447 places, 730 transitions, 12092 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-28 03:27:36,581 INFO L231 Difference]: Finished difference. Result has 448 places, 702 transitions, 10576 flow [2024-06-28 03:27:36,582 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10127, PETRI_DIFFERENCE_MINUEND_PLACES=438, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=687, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=572, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10576, PETRI_PLACES=448, PETRI_TRANSITIONS=702} [2024-06-28 03:27:36,582 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 405 predicate places. [2024-06-28 03:27:36,582 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 702 transitions, 10576 flow [2024-06-28 03:27:36,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:27:36,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:27:36,582 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:27:36,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-28 03:27:36,583 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)] === [2024-06-28 03:27:36,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:27:36,583 INFO L85 PathProgramCache]: Analyzing trace with hash -571102693, now seen corresponding path program 5 times [2024-06-28 03:27:36,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:27:36,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434612164] [2024-06-28 03:27:36,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:27:36,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:27:36,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:27:37,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:27:37,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:27:37,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434612164] [2024-06-28 03:27:37,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434612164] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:27:37,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:27:37,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:27:37,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121918923] [2024-06-28 03:27:37,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:27:37,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:27:37,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:27:37,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:27:37,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:27:37,603 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:27:37,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 702 transitions, 10576 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-28 03:27:37,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:27:37,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:27:37,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:27:39,722 INFO L124 PetriNetUnfolderBase]: 4826/7438 cut-off events. [2024-06-28 03:27:39,722 INFO L125 PetriNetUnfolderBase]: For 1546233/1546235 co-relation queries the response was YES. [2024-06-28 03:27:39,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76244 conditions, 7438 events. 4826/7438 cut-off events. For 1546233/1546235 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 43366 event pairs, 1334 based on Foata normal form. 4/7441 useless extension candidates. Maximal degree in co-relation 76043. Up to 7056 conditions per place. [2024-06-28 03:27:39,849 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 592 selfloop transitions, 107 changer transitions 0/734 dead transitions. [2024-06-28 03:27:39,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 734 transitions, 12153 flow [2024-06-28 03:27:39,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:27:39,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:27:39,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 177 transitions. [2024-06-28 03:27:39,851 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42142857142857143 [2024-06-28 03:27:39,851 INFO L175 Difference]: Start difference. First operand has 448 places, 702 transitions, 10576 flow. Second operand 10 states and 177 transitions. [2024-06-28 03:27:39,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 457 places, 734 transitions, 12153 flow [2024-06-28 03:27:43,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 734 transitions, 12035 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-28 03:27:43,920 INFO L231 Difference]: Finished difference. Result has 454 places, 706 transitions, 10753 flow [2024-06-28 03:27:43,921 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10458, PETRI_DIFFERENCE_MINUEND_PLACES=444, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=702, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=595, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10753, PETRI_PLACES=454, PETRI_TRANSITIONS=706} [2024-06-28 03:27:43,921 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 411 predicate places. [2024-06-28 03:27:43,921 INFO L495 AbstractCegarLoop]: Abstraction has has 454 places, 706 transitions, 10753 flow [2024-06-28 03:27:43,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-28 03:27:43,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:27:43,921 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:27:43,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-28 03:27:43,922 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)] === [2024-06-28 03:27:43,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:27:43,922 INFO L85 PathProgramCache]: Analyzing trace with hash -562770823, now seen corresponding path program 6 times [2024-06-28 03:27:43,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:27:43,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562569491] [2024-06-28 03:27:43,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:27:43,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:27:43,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:27:45,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:27:45,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:27:45,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562569491] [2024-06-28 03:27:45,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562569491] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:27:45,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:27:45,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:27:45,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574982030] [2024-06-28 03:27:45,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:27:45,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:27:45,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:27:45,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:27:45,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:27:45,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:27:45,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 454 places, 706 transitions, 10753 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-28 03:27:45,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:27:45,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:27:45,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:27:47,278 INFO L124 PetriNetUnfolderBase]: 4835/7449 cut-off events. [2024-06-28 03:27:47,278 INFO L125 PetriNetUnfolderBase]: For 1573693/1573695 co-relation queries the response was YES. [2024-06-28 03:27:47,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76823 conditions, 7449 events. 4835/7449 cut-off events. For 1573693/1573695 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 43428 event pairs, 1338 based on Foata normal form. 4/7452 useless extension candidates. Maximal degree in co-relation 76620. Up to 7104 conditions per place. [2024-06-28 03:27:47,416 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 611 selfloop transitions, 86 changer transitions 0/732 dead transitions. [2024-06-28 03:27:47,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 732 transitions, 12281 flow [2024-06-28 03:27:47,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:27:47,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:27:47,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 172 transitions. [2024-06-28 03:27:47,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4095238095238095 [2024-06-28 03:27:47,417 INFO L175 Difference]: Start difference. First operand has 454 places, 706 transitions, 10753 flow. Second operand 10 states and 172 transitions. [2024-06-28 03:27:47,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 463 places, 732 transitions, 12281 flow [2024-06-28 03:27:50,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 732 transitions, 12056 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-28 03:27:50,808 INFO L231 Difference]: Finished difference. Result has 456 places, 708 transitions, 10755 flow [2024-06-28 03:27:50,808 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10528, PETRI_DIFFERENCE_MINUEND_PLACES=446, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=706, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=620, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10755, PETRI_PLACES=456, PETRI_TRANSITIONS=708} [2024-06-28 03:27:50,809 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 413 predicate places. [2024-06-28 03:27:50,809 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 708 transitions, 10755 flow [2024-06-28 03:27:50,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-28 03:27:50,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:27:50,810 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:27:50,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-28 03:27:50,811 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)] === [2024-06-28 03:27:50,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:27:50,811 INFO L85 PathProgramCache]: Analyzing trace with hash 571386609, now seen corresponding path program 3 times [2024-06-28 03:27:50,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:27:50,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666398206] [2024-06-28 03:27:50,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:27:50,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:27:50,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:27:51,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:27:51,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:27:51,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666398206] [2024-06-28 03:27:51,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666398206] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:27:51,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:27:51,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:27:51,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304499020] [2024-06-28 03:27:51,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:27:51,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:27:51,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:27:51,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:27:51,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:27:51,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:27:51,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 708 transitions, 10755 flow. Second operand has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:27:51,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:27:51,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:27:51,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:27:54,155 INFO L124 PetriNetUnfolderBase]: 4942/7562 cut-off events. [2024-06-28 03:27:54,156 INFO L125 PetriNetUnfolderBase]: For 1589681/1589683 co-relation queries the response was YES. [2024-06-28 03:27:54,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77558 conditions, 7562 events. 4942/7562 cut-off events. For 1589681/1589683 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 43670 event pairs, 1396 based on Foata normal form. 3/7564 useless extension candidates. Maximal degree in co-relation 77354. Up to 7332 conditions per place. [2024-06-28 03:27:54,289 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 638 selfloop transitions, 99 changer transitions 0/740 dead transitions. [2024-06-28 03:27:54,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 465 places, 740 transitions, 12426 flow [2024-06-28 03:27:54,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:27:54,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:27:54,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 167 transitions. [2024-06-28 03:27:54,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3976190476190476 [2024-06-28 03:27:54,293 INFO L175 Difference]: Start difference. First operand has 456 places, 708 transitions, 10755 flow. Second operand 10 states and 167 transitions. [2024-06-28 03:27:54,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 465 places, 740 transitions, 12426 flow [2024-06-28 03:27:58,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 740 transitions, 12235 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-28 03:27:58,325 INFO L231 Difference]: Finished difference. Result has 458 places, 717 transitions, 10890 flow [2024-06-28 03:27:58,325 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10564, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=708, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=612, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10890, PETRI_PLACES=458, PETRI_TRANSITIONS=717} [2024-06-28 03:27:58,326 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 415 predicate places. [2024-06-28 03:27:58,326 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 717 transitions, 10890 flow [2024-06-28 03:27:58,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:27:58,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:27:58,328 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:27:58,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-28 03:27:58,329 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)] === [2024-06-28 03:27:58,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:27:58,329 INFO L85 PathProgramCache]: Analyzing trace with hash 571376379, now seen corresponding path program 4 times [2024-06-28 03:27:58,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:27:58,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062336849] [2024-06-28 03:27:58,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:27:58,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:27:58,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:27:59,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:27:59,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:27:59,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062336849] [2024-06-28 03:27:59,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062336849] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:27:59,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:27:59,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:27:59,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982971318] [2024-06-28 03:27:59,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:27:59,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:27:59,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:27:59,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:27:59,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:27:59,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:27:59,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 717 transitions, 10890 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:27:59,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:27:59,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:27:59,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:28:01,709 INFO L124 PetriNetUnfolderBase]: 4947/7569 cut-off events. [2024-06-28 03:28:01,709 INFO L125 PetriNetUnfolderBase]: For 1616488/1616490 co-relation queries the response was YES. [2024-06-28 03:28:01,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77863 conditions, 7569 events. 4947/7569 cut-off events. For 1616488/1616490 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 43700 event pairs, 1394 based on Foata normal form. 3/7571 useless extension candidates. Maximal degree in co-relation 77658. Up to 7322 conditions per place. [2024-06-28 03:28:01,847 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 629 selfloop transitions, 111 changer transitions 0/743 dead transitions. [2024-06-28 03:28:01,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 467 places, 743 transitions, 12516 flow [2024-06-28 03:28:01,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:28:01,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:28:01,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 169 transitions. [2024-06-28 03:28:01,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4023809523809524 [2024-06-28 03:28:01,848 INFO L175 Difference]: Start difference. First operand has 458 places, 717 transitions, 10890 flow. Second operand 10 states and 169 transitions. [2024-06-28 03:28:01,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 467 places, 743 transitions, 12516 flow [2024-06-28 03:28:05,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 460 places, 743 transitions, 12293 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-28 03:28:05,618 INFO L231 Difference]: Finished difference. Result has 461 places, 720 transitions, 10962 flow [2024-06-28 03:28:05,618 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10667, PETRI_DIFFERENCE_MINUEND_PLACES=451, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=717, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=606, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10962, PETRI_PLACES=461, PETRI_TRANSITIONS=720} [2024-06-28 03:28:05,618 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 418 predicate places. [2024-06-28 03:28:05,619 INFO L495 AbstractCegarLoop]: Abstraction has has 461 places, 720 transitions, 10962 flow [2024-06-28 03:28:05,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:28:05,619 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:28:05,619 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:28:05,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-28 03:28:05,619 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)] === [2024-06-28 03:28:05,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:28:05,620 INFO L85 PathProgramCache]: Analyzing trace with hash 1052559309, now seen corresponding path program 5 times [2024-06-28 03:28:05,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:28:05,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168112891] [2024-06-28 03:28:05,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:28:05,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:28:05,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:28:06,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:28:06,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:28:06,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168112891] [2024-06-28 03:28:06,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168112891] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:28:06,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:28:06,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:28:06,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712368654] [2024-06-28 03:28:06,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:28:06,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:28:06,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:28:06,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:28:06,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:28:06,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:28:06,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 720 transitions, 10962 flow. Second operand has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:28:06,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:28:06,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:28:06,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:28:09,078 INFO L124 PetriNetUnfolderBase]: 4957/7583 cut-off events. [2024-06-28 03:28:09,078 INFO L125 PetriNetUnfolderBase]: For 1643350/1643352 co-relation queries the response was YES. [2024-06-28 03:28:09,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78250 conditions, 7583 events. 4957/7583 cut-off events. For 1643350/1643352 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 43738 event pairs, 1372 based on Foata normal form. 3/7585 useless extension candidates. Maximal degree in co-relation 78044. Up to 7355 conditions per place. [2024-06-28 03:28:09,235 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 639 selfloop transitions, 104 changer transitions 0/746 dead transitions. [2024-06-28 03:28:09,235 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 746 transitions, 12632 flow [2024-06-28 03:28:09,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:28:09,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:28:09,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 161 transitions. [2024-06-28 03:28:09,237 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38333333333333336 [2024-06-28 03:28:09,237 INFO L175 Difference]: Start difference. First operand has 461 places, 720 transitions, 10962 flow. Second operand 10 states and 161 transitions. [2024-06-28 03:28:09,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 746 transitions, 12632 flow [2024-06-28 03:28:12,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 462 places, 746 transitions, 12369 flow, removed 22 selfloop flow, removed 8 redundant places. [2024-06-28 03:28:12,980 INFO L231 Difference]: Finished difference. Result has 463 places, 726 transitions, 11023 flow [2024-06-28 03:28:12,981 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10705, PETRI_DIFFERENCE_MINUEND_PLACES=453, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=720, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=619, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11023, PETRI_PLACES=463, PETRI_TRANSITIONS=726} [2024-06-28 03:28:12,981 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 420 predicate places. [2024-06-28 03:28:12,981 INFO L495 AbstractCegarLoop]: Abstraction has has 463 places, 726 transitions, 11023 flow [2024-06-28 03:28:12,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:28:12,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:28:12,982 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:28:12,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-28 03:28:12,982 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)] === [2024-06-28 03:28:12,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:28:12,983 INFO L85 PathProgramCache]: Analyzing trace with hash -275883183, now seen corresponding path program 6 times [2024-06-28 03:28:12,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:28:12,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204400416] [2024-06-28 03:28:12,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:28:12,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:28:12,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:28:13,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:28:13,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:28:13,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204400416] [2024-06-28 03:28:13,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204400416] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:28:13,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:28:13,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:28:13,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741230449] [2024-06-28 03:28:13,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:28:13,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:28:13,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:28:13,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:28:13,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:28:14,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:28:14,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 463 places, 726 transitions, 11023 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:28:14,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:28:14,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:28:14,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:28:16,477 INFO L124 PetriNetUnfolderBase]: 4962/7590 cut-off events. [2024-06-28 03:28:16,478 INFO L125 PetriNetUnfolderBase]: For 1670755/1670757 co-relation queries the response was YES. [2024-06-28 03:28:16,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78520 conditions, 7590 events. 4962/7590 cut-off events. For 1670755/1670757 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 43778 event pairs, 1372 based on Foata normal form. 3/7592 useless extension candidates. Maximal degree in co-relation 78313. Up to 7347 conditions per place. [2024-06-28 03:28:16,593 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 638 selfloop transitions, 109 changer transitions 0/750 dead transitions. [2024-06-28 03:28:16,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 472 places, 750 transitions, 12897 flow [2024-06-28 03:28:16,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:28:16,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:28:16,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 164 transitions. [2024-06-28 03:28:16,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3904761904761905 [2024-06-28 03:28:16,595 INFO L175 Difference]: Start difference. First operand has 463 places, 726 transitions, 11023 flow. Second operand 10 states and 164 transitions. [2024-06-28 03:28:16,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 472 places, 750 transitions, 12897 flow [2024-06-28 03:28:20,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 465 places, 750 transitions, 12651 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-06-28 03:28:20,112 INFO L231 Difference]: Finished difference. Result has 466 places, 729 transitions, 11070 flow [2024-06-28 03:28:20,128 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10777, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=726, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=620, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11070, PETRI_PLACES=466, PETRI_TRANSITIONS=729} [2024-06-28 03:28:20,128 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 423 predicate places. [2024-06-28 03:28:20,128 INFO L495 AbstractCegarLoop]: Abstraction has has 466 places, 729 transitions, 11070 flow [2024-06-28 03:28:20,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:28:20,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:28:20,129 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:28:20,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-28 03:28:20,129 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)] === [2024-06-28 03:28:20,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:28:20,129 INFO L85 PathProgramCache]: Analyzing trace with hash 581217639, now seen corresponding path program 7 times [2024-06-28 03:28:20,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:28:20,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016345310] [2024-06-28 03:28:20,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:28:20,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:28:20,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:28:21,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:28:21,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:28:21,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016345310] [2024-06-28 03:28:21,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016345310] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:28:21,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:28:21,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:28:21,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716470670] [2024-06-28 03:28:21,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:28:21,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:28:21,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:28:21,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:28:21,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:28:21,382 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:28:21,382 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 466 places, 729 transitions, 11070 flow. Second operand has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:28:21,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:28:21,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:28:21,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:28:23,759 INFO L124 PetriNetUnfolderBase]: 4959/7586 cut-off events. [2024-06-28 03:28:23,760 INFO L125 PetriNetUnfolderBase]: For 1691402/1691404 co-relation queries the response was YES. [2024-06-28 03:28:23,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78581 conditions, 7586 events. 4959/7586 cut-off events. For 1691402/1691404 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 43815 event pairs, 1372 based on Foata normal form. 3/7588 useless extension candidates. Maximal degree in co-relation 78373. Up to 7358 conditions per place. [2024-06-28 03:28:23,882 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 647 selfloop transitions, 99 changer transitions 0/749 dead transitions. [2024-06-28 03:28:23,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 475 places, 749 transitions, 12642 flow [2024-06-28 03:28:23,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:28:23,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:28:23,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 162 transitions. [2024-06-28 03:28:23,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38571428571428573 [2024-06-28 03:28:23,883 INFO L175 Difference]: Start difference. First operand has 466 places, 729 transitions, 11070 flow. Second operand 10 states and 162 transitions. [2024-06-28 03:28:23,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 475 places, 749 transitions, 12642 flow [2024-06-28 03:28:28,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 468 places, 749 transitions, 12326 flow, removed 44 selfloop flow, removed 7 redundant places. [2024-06-28 03:28:28,056 INFO L231 Difference]: Finished difference. Result has 469 places, 729 transitions, 10958 flow [2024-06-28 03:28:28,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10754, PETRI_DIFFERENCE_MINUEND_PLACES=459, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=729, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=630, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10958, PETRI_PLACES=469, PETRI_TRANSITIONS=729} [2024-06-28 03:28:28,057 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 426 predicate places. [2024-06-28 03:28:28,057 INFO L495 AbstractCegarLoop]: Abstraction has has 469 places, 729 transitions, 10958 flow [2024-06-28 03:28:28,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:28:28,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:28:28,057 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:28:28,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-28 03:28:28,058 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)] === [2024-06-28 03:28:28,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:28:28,058 INFO L85 PathProgramCache]: Analyzing trace with hash -275883493, now seen corresponding path program 7 times [2024-06-28 03:28:28,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:28:28,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987201565] [2024-06-28 03:28:28,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:28:28,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:28:28,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:28:29,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:28:29,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:28:29,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987201565] [2024-06-28 03:28:29,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987201565] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:28:29,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:28:29,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:28:29,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029784230] [2024-06-28 03:28:29,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:28:29,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:28:29,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:28:29,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:28:29,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:28:29,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:28:29,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 469 places, 729 transitions, 10958 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-28 03:28:29,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:28:29,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:28:29,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:28:31,527 INFO L124 PetriNetUnfolderBase]: 4864/7489 cut-off events. [2024-06-28 03:28:31,527 INFO L125 PetriNetUnfolderBase]: For 1716108/1716110 co-relation queries the response was YES. [2024-06-28 03:28:31,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77998 conditions, 7489 events. 4864/7489 cut-off events. For 1716108/1716110 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 43660 event pairs, 1318 based on Foata normal form. 4/7492 useless extension candidates. Maximal degree in co-relation 77789. Up to 7138 conditions per place. [2024-06-28 03:28:31,661 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 626 selfloop transitions, 82 changer transitions 0/750 dead transitions. [2024-06-28 03:28:31,661 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 478 places, 750 transitions, 12456 flow [2024-06-28 03:28:31,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:28:31,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:28:31,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 167 transitions. [2024-06-28 03:28:31,662 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3976190476190476 [2024-06-28 03:28:31,663 INFO L175 Difference]: Start difference. First operand has 469 places, 729 transitions, 10958 flow. Second operand 10 states and 167 transitions. [2024-06-28 03:28:31,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 478 places, 750 transitions, 12456 flow [2024-06-28 03:28:35,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 469 places, 750 transitions, 12210 flow, removed 14 selfloop flow, removed 9 redundant places. [2024-06-28 03:28:35,901 INFO L231 Difference]: Finished difference. Result has 470 places, 729 transitions, 10882 flow [2024-06-28 03:28:35,901 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10712, PETRI_DIFFERENCE_MINUEND_PLACES=460, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=729, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=647, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10882, PETRI_PLACES=470, PETRI_TRANSITIONS=729} [2024-06-28 03:28:35,902 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 427 predicate places. [2024-06-28 03:28:35,902 INFO L495 AbstractCegarLoop]: Abstraction has has 470 places, 729 transitions, 10882 flow [2024-06-28 03:28:35,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-28 03:28:35,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:28:35,902 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:28:35,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-28 03:28:35,903 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)] === [2024-06-28 03:28:35,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:28:35,903 INFO L85 PathProgramCache]: Analyzing trace with hash -463340379, now seen corresponding path program 9 times [2024-06-28 03:28:35,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:28:35,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100883440] [2024-06-28 03:28:35,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:28:35,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:28:35,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:28:37,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:28:37,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:28:37,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100883440] [2024-06-28 03:28:37,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100883440] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:28:37,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:28:37,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:28:37,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116468577] [2024-06-28 03:28:37,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:28:37,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:28:37,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:28:37,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:28:37,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:28:37,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:28:37,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 729 transitions, 10882 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:28:37,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:28:37,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:28:37,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:28:39,668 INFO L124 PetriNetUnfolderBase]: 4870/7498 cut-off events. [2024-06-28 03:28:39,668 INFO L125 PetriNetUnfolderBase]: For 1745147/1745150 co-relation queries the response was YES. [2024-06-28 03:28:39,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78231 conditions, 7498 events. 4870/7498 cut-off events. For 1745147/1745150 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 43767 event pairs, 1461 based on Foata normal form. 4/7495 useless extension candidates. Maximal degree in co-relation 78021. Up to 7076 conditions per place. [2024-06-28 03:28:39,780 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 593 selfloop transitions, 121 changer transitions 0/756 dead transitions. [2024-06-28 03:28:39,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 477 places, 756 transitions, 12723 flow [2024-06-28 03:28:39,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:28:39,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:28:39,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-28 03:28:39,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-28 03:28:39,782 INFO L175 Difference]: Start difference. First operand has 470 places, 729 transitions, 10882 flow. Second operand 8 states and 146 transitions. [2024-06-28 03:28:39,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 477 places, 756 transitions, 12723 flow [2024-06-28 03:28:43,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 469 places, 756 transitions, 12529 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-28 03:28:43,643 INFO L231 Difference]: Finished difference. Result has 470 places, 732 transitions, 11015 flow [2024-06-28 03:28:43,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10688, PETRI_DIFFERENCE_MINUEND_PLACES=462, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=729, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=611, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11015, PETRI_PLACES=470, PETRI_TRANSITIONS=732} [2024-06-28 03:28:43,644 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 427 predicate places. [2024-06-28 03:28:43,644 INFO L495 AbstractCegarLoop]: Abstraction has has 470 places, 732 transitions, 11015 flow [2024-06-28 03:28:43,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:28:43,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:28:43,644 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:28:43,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-28 03:28:43,645 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)] === [2024-06-28 03:28:43,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:28:43,645 INFO L85 PathProgramCache]: Analyzing trace with hash -457626459, now seen corresponding path program 10 times [2024-06-28 03:28:43,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:28:43,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787174287] [2024-06-28 03:28:43,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:28:43,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:28:43,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:28:44,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:28:44,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:28:44,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787174287] [2024-06-28 03:28:44,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787174287] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:28:44,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:28:44,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:28:44,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328035205] [2024-06-28 03:28:44,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:28:44,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:28:44,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:28:44,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:28:44,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:28:44,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:28:44,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 732 transitions, 11015 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:28:44,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:28:44,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:28:44,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:28:47,426 INFO L124 PetriNetUnfolderBase]: 4875/7505 cut-off events. [2024-06-28 03:28:47,426 INFO L125 PetriNetUnfolderBase]: For 1765734/1765737 co-relation queries the response was YES. [2024-06-28 03:28:47,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78648 conditions, 7505 events. 4875/7505 cut-off events. For 1765734/1765737 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 43805 event pairs, 1463 based on Foata normal form. 3/7501 useless extension candidates. Maximal degree in co-relation 78437. Up to 7082 conditions per place. [2024-06-28 03:28:47,560 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 589 selfloop transitions, 130 changer transitions 0/761 dead transitions. [2024-06-28 03:28:47,561 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 479 places, 761 transitions, 12878 flow [2024-06-28 03:28:47,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:28:47,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:28:47,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 172 transitions. [2024-06-28 03:28:47,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4095238095238095 [2024-06-28 03:28:47,563 INFO L175 Difference]: Start difference. First operand has 470 places, 732 transitions, 11015 flow. Second operand 10 states and 172 transitions. [2024-06-28 03:28:47,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 479 places, 761 transitions, 12878 flow [2024-06-28 03:28:51,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 473 places, 761 transitions, 12664 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-28 03:28:51,762 INFO L231 Difference]: Finished difference. Result has 474 places, 735 transitions, 11150 flow [2024-06-28 03:28:51,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10808, PETRI_DIFFERENCE_MINUEND_PLACES=464, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=732, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=605, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11150, PETRI_PLACES=474, PETRI_TRANSITIONS=735} [2024-06-28 03:28:51,762 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 431 predicate places. [2024-06-28 03:28:51,762 INFO L495 AbstractCegarLoop]: Abstraction has has 474 places, 735 transitions, 11150 flow [2024-06-28 03:28:51,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:28:51,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:28:51,763 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:28:51,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-28 03:28:51,763 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)] === [2024-06-28 03:28:51,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:28:51,763 INFO L85 PathProgramCache]: Analyzing trace with hash -347870463, now seen corresponding path program 4 times [2024-06-28 03:28:51,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:28:51,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959257103] [2024-06-28 03:28:51,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:28:51,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:28:51,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:28:52,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:28:52,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:28:52,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959257103] [2024-06-28 03:28:52,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959257103] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:28:52,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:28:52,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:28:52,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217779367] [2024-06-28 03:28:52,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:28:52,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:28:52,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:28:52,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:28:52,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:28:52,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:28:52,886 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 474 places, 735 transitions, 11150 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:28:52,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:28:52,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:28:52,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:28:55,490 INFO L124 PetriNetUnfolderBase]: 4922/7582 cut-off events. [2024-06-28 03:28:55,490 INFO L125 PetriNetUnfolderBase]: For 1755796/1755798 co-relation queries the response was YES. [2024-06-28 03:28:55,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78917 conditions, 7582 events. 4922/7582 cut-off events. For 1755796/1755798 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 44357 event pairs, 1826 based on Foata normal form. 4/7585 useless extension candidates. Maximal degree in co-relation 78706. Up to 7160 conditions per place. [2024-06-28 03:28:55,613 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 663 selfloop transitions, 74 changer transitions 0/779 dead transitions. [2024-06-28 03:28:55,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 482 places, 779 transitions, 13137 flow [2024-06-28 03:28:55,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:28:55,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:28:55,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-28 03:28:55,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-28 03:28:55,614 INFO L175 Difference]: Start difference. First operand has 474 places, 735 transitions, 11150 flow. Second operand 9 states and 153 transitions. [2024-06-28 03:28:55,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 482 places, 779 transitions, 13137 flow [2024-06-28 03:29:00,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 472 places, 779 transitions, 12823 flow, removed 18 selfloop flow, removed 10 redundant places. [2024-06-28 03:29:00,173 INFO L231 Difference]: Finished difference. Result has 476 places, 753 transitions, 11418 flow [2024-06-28 03:29:00,173 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10836, PETRI_DIFFERENCE_MINUEND_PLACES=464, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=735, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=661, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11418, PETRI_PLACES=476, PETRI_TRANSITIONS=753} [2024-06-28 03:29:00,173 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 433 predicate places. [2024-06-28 03:29:00,174 INFO L495 AbstractCegarLoop]: Abstraction has has 476 places, 753 transitions, 11418 flow [2024-06-28 03:29:00,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:29:00,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:29:00,174 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:29:00,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-28 03:29:00,174 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)] === [2024-06-28 03:29:00,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:29:00,175 INFO L85 PathProgramCache]: Analyzing trace with hash -348049209, now seen corresponding path program 11 times [2024-06-28 03:29:00,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:29:00,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118115309] [2024-06-28 03:29:00,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:29:00,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:29:00,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:29:01,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:29:01,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:29:01,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118115309] [2024-06-28 03:29:01,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118115309] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:29:01,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:29:01,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:29:01,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931633589] [2024-06-28 03:29:01,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:29:01,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:29:01,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:29:01,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:29:01,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:29:01,197 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:29:01,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 476 places, 753 transitions, 11418 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:29:01,198 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:29:01,198 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:29:01,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:29:03,743 INFO L124 PetriNetUnfolderBase]: 4947/7604 cut-off events. [2024-06-28 03:29:03,743 INFO L125 PetriNetUnfolderBase]: For 1726578/1726582 co-relation queries the response was YES. [2024-06-28 03:29:03,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79799 conditions, 7604 events. 4947/7604 cut-off events. For 1726578/1726582 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 44348 event pairs, 1352 based on Foata normal form. 6/7609 useless extension candidates. Maximal degree in co-relation 79586. Up to 7015 conditions per place. [2024-06-28 03:29:03,869 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 557 selfloop transitions, 192 changer transitions 0/791 dead transitions. [2024-06-28 03:29:03,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 483 places, 791 transitions, 14059 flow [2024-06-28 03:29:03,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:29:03,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:29:03,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-28 03:29:03,871 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2024-06-28 03:29:03,871 INFO L175 Difference]: Start difference. First operand has 476 places, 753 transitions, 11418 flow. Second operand 8 states and 149 transitions. [2024-06-28 03:29:03,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 483 places, 791 transitions, 14059 flow [2024-06-28 03:29:08,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 478 places, 791 transitions, 13833 flow, removed 61 selfloop flow, removed 5 redundant places. [2024-06-28 03:29:08,300 INFO L231 Difference]: Finished difference. Result has 479 places, 765 transitions, 11862 flow [2024-06-28 03:29:08,300 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11192, PETRI_DIFFERENCE_MINUEND_PLACES=471, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=753, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=573, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11862, PETRI_PLACES=479, PETRI_TRANSITIONS=765} [2024-06-28 03:29:08,301 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 436 predicate places. [2024-06-28 03:29:08,301 INFO L495 AbstractCegarLoop]: Abstraction has has 479 places, 765 transitions, 11862 flow [2024-06-28 03:29:08,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:29:08,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:29:08,301 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:29:08,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-28 03:29:08,301 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)] === [2024-06-28 03:29:08,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:29:08,302 INFO L85 PathProgramCache]: Analyzing trace with hash -347750679, now seen corresponding path program 12 times [2024-06-28 03:29:08,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:29:08,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843746912] [2024-06-28 03:29:08,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:29:08,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:29:08,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:29:09,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:29:09,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:29:09,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843746912] [2024-06-28 03:29:09,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843746912] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:29:09,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:29:09,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:29:09,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003883115] [2024-06-28 03:29:09,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:29:09,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:29:09,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:29:09,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:29:09,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:29:09,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:29:09,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 479 places, 765 transitions, 11862 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:29:09,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:29:09,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:29:09,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:29:11,746 INFO L124 PetriNetUnfolderBase]: 5020/7721 cut-off events. [2024-06-28 03:29:11,746 INFO L125 PetriNetUnfolderBase]: For 1751846/1751848 co-relation queries the response was YES. [2024-06-28 03:29:11,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80885 conditions, 7721 events. 5020/7721 cut-off events. For 1751846/1751848 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 45301 event pairs, 1836 based on Foata normal form. 4/7724 useless extension candidates. Maximal degree in co-relation 80670. Up to 7220 conditions per place. [2024-06-28 03:29:11,884 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 624 selfloop transitions, 160 changer transitions 0/826 dead transitions. [2024-06-28 03:29:11,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 487 places, 826 transitions, 14638 flow [2024-06-28 03:29:11,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:29:11,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:29:11,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-28 03:29:11,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-28 03:29:11,886 INFO L175 Difference]: Start difference. First operand has 479 places, 765 transitions, 11862 flow. Second operand 9 states and 153 transitions. [2024-06-28 03:29:11,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 487 places, 826 transitions, 14638 flow [2024-06-28 03:29:15,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 482 places, 826 transitions, 14121 flow, removed 93 selfloop flow, removed 5 redundant places. [2024-06-28 03:29:16,058 INFO L231 Difference]: Finished difference. Result has 485 places, 806 transitions, 12480 flow [2024-06-28 03:29:16,072 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11443, PETRI_DIFFERENCE_MINUEND_PLACES=474, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=765, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=608, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12480, PETRI_PLACES=485, PETRI_TRANSITIONS=806} [2024-06-28 03:29:16,072 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 442 predicate places. [2024-06-28 03:29:16,073 INFO L495 AbstractCegarLoop]: Abstraction has has 485 places, 806 transitions, 12480 flow [2024-06-28 03:29:16,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:29:16,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:29:16,073 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:29:16,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-28 03:29:16,073 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)] === [2024-06-28 03:29:16,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:29:16,074 INFO L85 PathProgramCache]: Analyzing trace with hash -347750307, now seen corresponding path program 4 times [2024-06-28 03:29:16,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:29:16,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215040348] [2024-06-28 03:29:16,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:29:16,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:29:16,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:29:17,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:29:17,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:29:17,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215040348] [2024-06-28 03:29:17,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215040348] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:29:17,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:29:17,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:29:17,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750206421] [2024-06-28 03:29:17,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:29:17,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:29:17,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:29:17,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:29:17,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:29:17,113 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:29:17,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 485 places, 806 transitions, 12480 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:29:17,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:29:17,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:29:17,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:29:19,329 INFO L124 PetriNetUnfolderBase]: 5129/7822 cut-off events. [2024-06-28 03:29:19,329 INFO L125 PetriNetUnfolderBase]: For 1752380/1752384 co-relation queries the response was YES. [2024-06-28 03:29:19,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81548 conditions, 7822 events. 5129/7822 cut-off events. For 1752380/1752384 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 45307 event pairs, 1570 based on Foata normal form. 6/7827 useless extension candidates. Maximal degree in co-relation 81331. Up to 7561 conditions per place. [2024-06-28 03:29:19,608 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 719 selfloop transitions, 114 changer transitions 0/836 dead transitions. [2024-06-28 03:29:19,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 492 places, 836 transitions, 14865 flow [2024-06-28 03:29:19,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:29:19,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:29:19,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-28 03:29:19,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-28 03:29:19,609 INFO L175 Difference]: Start difference. First operand has 485 places, 806 transitions, 12480 flow. Second operand 8 states and 138 transitions. [2024-06-28 03:29:19,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 492 places, 836 transitions, 14865 flow [2024-06-28 03:29:24,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 487 places, 836 transitions, 14592 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-28 03:29:24,178 INFO L231 Difference]: Finished difference. Result has 488 places, 815 transitions, 12576 flow [2024-06-28 03:29:24,179 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12207, PETRI_DIFFERENCE_MINUEND_PLACES=480, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=806, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=701, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12576, PETRI_PLACES=488, PETRI_TRANSITIONS=815} [2024-06-28 03:29:24,179 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 445 predicate places. [2024-06-28 03:29:24,179 INFO L495 AbstractCegarLoop]: Abstraction has has 488 places, 815 transitions, 12576 flow [2024-06-28 03:29:24,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:29:24,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:29:24,180 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:29:24,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-28 03:29:24,180 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)] === [2024-06-28 03:29:24,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:29:24,180 INFO L85 PathProgramCache]: Analyzing trace with hash -347750493, now seen corresponding path program 5 times [2024-06-28 03:29:24,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:29:24,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280184517] [2024-06-28 03:29:24,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:29:24,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:29:24,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:29:25,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:29:25,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:29:25,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280184517] [2024-06-28 03:29:25,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280184517] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:29:25,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:29:25,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:29:25,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412256597] [2024-06-28 03:29:25,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:29:25,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:29:25,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:29:25,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:29:25,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:29:25,341 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:29:25,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 488 places, 815 transitions, 12576 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:29:25,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:29:25,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:29:25,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:29:27,708 INFO L124 PetriNetUnfolderBase]: 5082/7792 cut-off events. [2024-06-28 03:29:27,708 INFO L125 PetriNetUnfolderBase]: For 1820891/1820895 co-relation queries the response was YES. [2024-06-28 03:29:27,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82290 conditions, 7792 events. 5082/7792 cut-off events. For 1820891/1820895 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 45477 event pairs, 1470 based on Foata normal form. 6/7797 useless extension candidates. Maximal degree in co-relation 82072. Up to 7181 conditions per place. [2024-06-28 03:29:27,831 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 673 selfloop transitions, 145 changer transitions 0/863 dead transitions. [2024-06-28 03:29:27,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 495 places, 863 transitions, 15336 flow [2024-06-28 03:29:27,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:29:27,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:29:27,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-28 03:29:27,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-28 03:29:27,833 INFO L175 Difference]: Start difference. First operand has 488 places, 815 transitions, 12576 flow. Second operand 8 states and 150 transitions. [2024-06-28 03:29:27,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 495 places, 863 transitions, 15336 flow [2024-06-28 03:29:32,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 491 places, 863 transitions, 15156 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-06-28 03:29:32,652 INFO L231 Difference]: Finished difference. Result has 492 places, 831 transitions, 13112 flow [2024-06-28 03:29:32,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12400, PETRI_DIFFERENCE_MINUEND_PLACES=484, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=815, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=683, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13112, PETRI_PLACES=492, PETRI_TRANSITIONS=831} [2024-06-28 03:29:32,652 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 449 predicate places. [2024-06-28 03:29:32,652 INFO L495 AbstractCegarLoop]: Abstraction has has 492 places, 831 transitions, 13112 flow [2024-06-28 03:29:32,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:29:32,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:29:32,653 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:29:32,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-28 03:29:32,653 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)] === [2024-06-28 03:29:32,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:29:32,653 INFO L85 PathProgramCache]: Analyzing trace with hash -170619159, now seen corresponding path program 13 times [2024-06-28 03:29:32,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:29:32,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217647012] [2024-06-28 03:29:32,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:29:32,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:29:32,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:29:33,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:29:33,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:29:33,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217647012] [2024-06-28 03:29:33,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217647012] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:29:33,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:29:33,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:29:33,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762238629] [2024-06-28 03:29:33,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:29:33,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:29:33,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:29:33,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:29:33,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:29:33,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:29:33,811 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 492 places, 831 transitions, 13112 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:29:33,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:29:33,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:29:33,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:29:36,342 INFO L124 PetriNetUnfolderBase]: 5102/7835 cut-off events. [2024-06-28 03:29:36,342 INFO L125 PetriNetUnfolderBase]: For 1823415/1823417 co-relation queries the response was YES. [2024-06-28 03:29:36,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83410 conditions, 7835 events. 5102/7835 cut-off events. For 1823415/1823417 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 45964 event pairs, 1832 based on Foata normal form. 3/7837 useless extension candidates. Maximal degree in co-relation 83192. Up to 7323 conditions per place. [2024-06-28 03:29:36,472 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 642 selfloop transitions, 170 changer transitions 0/857 dead transitions. [2024-06-28 03:29:36,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 500 places, 857 transitions, 15717 flow [2024-06-28 03:29:36,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:29:36,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:29:36,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-28 03:29:36,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3994708994708995 [2024-06-28 03:29:36,474 INFO L175 Difference]: Start difference. First operand has 492 places, 831 transitions, 13112 flow. Second operand 9 states and 151 transitions. [2024-06-28 03:29:36,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 500 places, 857 transitions, 15717 flow [2024-06-28 03:29:41,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 496 places, 857 transitions, 15453 flow, removed 101 selfloop flow, removed 4 redundant places. [2024-06-28 03:29:41,242 INFO L231 Difference]: Finished difference. Result has 498 places, 841 transitions, 13447 flow [2024-06-28 03:29:41,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12854, PETRI_DIFFERENCE_MINUEND_PLACES=488, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=831, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=670, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13447, PETRI_PLACES=498, PETRI_TRANSITIONS=841} [2024-06-28 03:29:41,243 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 455 predicate places. [2024-06-28 03:29:41,243 INFO L495 AbstractCegarLoop]: Abstraction has has 498 places, 841 transitions, 13447 flow [2024-06-28 03:29:41,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:29:41,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:29:41,243 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:29:41,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-28 03:29:41,244 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)] === [2024-06-28 03:29:41,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:29:41,244 INFO L85 PathProgramCache]: Analyzing trace with hash -170618787, now seen corresponding path program 5 times [2024-06-28 03:29:41,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:29:41,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76188457] [2024-06-28 03:29:41,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:29:41,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:29:41,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:29:42,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:29:42,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:29:42,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76188457] [2024-06-28 03:29:42,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76188457] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:29:42,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:29:42,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:29:42,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590868921] [2024-06-28 03:29:42,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:29:42,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:29:42,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:29:42,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:29:42,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:29:42,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:29:42,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 498 places, 841 transitions, 13447 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:29:42,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:29:42,335 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:29:42,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:29:44,776 INFO L124 PetriNetUnfolderBase]: 5215/7936 cut-off events. [2024-06-28 03:29:44,777 INFO L125 PetriNetUnfolderBase]: For 1825872/1825876 co-relation queries the response was YES. [2024-06-28 03:29:44,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84056 conditions, 7936 events. 5215/7936 cut-off events. For 1825872/1825876 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 45869 event pairs, 1574 based on Foata normal form. 5/7940 useless extension candidates. Maximal degree in co-relation 83836. Up to 7675 conditions per place. [2024-06-28 03:29:44,916 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 743 selfloop transitions, 123 changer transitions 0/869 dead transitions. [2024-06-28 03:29:44,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 505 places, 869 transitions, 16098 flow [2024-06-28 03:29:44,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:29:44,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:29:44,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-28 03:29:44,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-28 03:29:44,918 INFO L175 Difference]: Start difference. First operand has 498 places, 841 transitions, 13447 flow. Second operand 8 states and 137 transitions. [2024-06-28 03:29:44,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 505 places, 869 transitions, 16098 flow [2024-06-28 03:29:49,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 501 places, 869 transitions, 15902 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-28 03:29:49,850 INFO L231 Difference]: Finished difference. Result has 502 places, 851 transitions, 13641 flow [2024-06-28 03:29:49,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13251, PETRI_DIFFERENCE_MINUEND_PLACES=494, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=841, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=728, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13641, PETRI_PLACES=502, PETRI_TRANSITIONS=851} [2024-06-28 03:29:49,850 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 459 predicate places. [2024-06-28 03:29:49,851 INFO L495 AbstractCegarLoop]: Abstraction has has 502 places, 851 transitions, 13641 flow [2024-06-28 03:29:49,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:29:49,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:29:49,851 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:29:49,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-28 03:29:49,851 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)] === [2024-06-28 03:29:49,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:29:49,851 INFO L85 PathProgramCache]: Analyzing trace with hash -170618973, now seen corresponding path program 6 times [2024-06-28 03:29:49,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:29:49,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833406150] [2024-06-28 03:29:49,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:29:49,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:29:49,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:29:50,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:29:50,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:29:50,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833406150] [2024-06-28 03:29:50,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833406150] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:29:50,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:29:50,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:29:50,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150888237] [2024-06-28 03:29:50,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:29:50,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:29:50,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:29:50,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:29:50,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:29:50,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:29:50,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 502 places, 851 transitions, 13641 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:29:50,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:29:50,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:29:50,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:29:53,394 INFO L124 PetriNetUnfolderBase]: 5169/7928 cut-off events. [2024-06-28 03:29:53,395 INFO L125 PetriNetUnfolderBase]: For 1886879/1886881 co-relation queries the response was YES. [2024-06-28 03:29:53,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84555 conditions, 7928 events. 5169/7928 cut-off events. For 1886879/1886881 co-relation queries the response was YES. Maximal size of possible extension queue 458. Compared 46508 event pairs, 1850 based on Foata normal form. 2/7929 useless extension candidates. Maximal degree in co-relation 84334. Up to 7341 conditions per place. [2024-06-28 03:29:53,534 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 694 selfloop transitions, 146 changer transitions 0/888 dead transitions. [2024-06-28 03:29:53,534 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 510 places, 888 transitions, 16204 flow [2024-06-28 03:29:53,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:29:53,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:29:53,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-28 03:29:53,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-28 03:29:53,536 INFO L175 Difference]: Start difference. First operand has 502 places, 851 transitions, 13641 flow. Second operand 9 states and 153 transitions. [2024-06-28 03:29:53,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 510 places, 888 transitions, 16204 flow [2024-06-28 03:29:59,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 506 places, 888 transitions, 16043 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-28 03:29:59,193 INFO L231 Difference]: Finished difference. Result has 508 places, 867 transitions, 14153 flow [2024-06-28 03:29:59,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13484, PETRI_DIFFERENCE_MINUEND_PLACES=498, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=851, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=715, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14153, PETRI_PLACES=508, PETRI_TRANSITIONS=867} [2024-06-28 03:29:59,194 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 465 predicate places. [2024-06-28 03:29:59,194 INFO L495 AbstractCegarLoop]: Abstraction has has 508 places, 867 transitions, 14153 flow [2024-06-28 03:29:59,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:29:59,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:29:59,194 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:29:59,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-28 03:29:59,194 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)] === [2024-06-28 03:29:59,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:29:59,195 INFO L85 PathProgramCache]: Analyzing trace with hash -170739129, now seen corresponding path program 14 times [2024-06-28 03:29:59,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:29:59,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143616404] [2024-06-28 03:29:59,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:29:59,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:29:59,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:30:00,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:30:00,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:30:00,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143616404] [2024-06-28 03:30:00,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143616404] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:30:00,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:30:00,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:30:00,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742285868] [2024-06-28 03:30:00,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:30:00,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:30:00,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:30:00,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:30:00,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:30:00,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:30:00,281 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 508 places, 867 transitions, 14153 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:30:00,281 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:30:00,281 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:30:00,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:30:02,891 INFO L124 PetriNetUnfolderBase]: 5168/7914 cut-off events. [2024-06-28 03:30:02,892 INFO L125 PetriNetUnfolderBase]: For 1870449/1870451 co-relation queries the response was YES. [2024-06-28 03:30:02,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84704 conditions, 7914 events. 5168/7914 cut-off events. For 1870449/1870451 co-relation queries the response was YES. Maximal size of possible extension queue 458. Compared 46257 event pairs, 1326 based on Foata normal form. 3/7916 useless extension candidates. Maximal degree in co-relation 84482. Up to 7553 conditions per place. [2024-06-28 03:30:03,028 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 751 selfloop transitions, 83 changer transitions 0/882 dead transitions. [2024-06-28 03:30:03,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 515 places, 882 transitions, 15887 flow [2024-06-28 03:30:03,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:30:03,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:30:03,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-28 03:30:03,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-28 03:30:03,029 INFO L175 Difference]: Start difference. First operand has 508 places, 867 transitions, 14153 flow. Second operand 8 states and 136 transitions. [2024-06-28 03:30:03,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 515 places, 882 transitions, 15887 flow [2024-06-28 03:30:07,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 509 places, 882 transitions, 15612 flow, removed 58 selfloop flow, removed 6 redundant places. [2024-06-28 03:30:07,695 INFO L231 Difference]: Finished difference. Result has 510 places, 867 transitions, 14058 flow [2024-06-28 03:30:07,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13878, PETRI_DIFFERENCE_MINUEND_PLACES=502, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=867, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=784, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=14058, PETRI_PLACES=510, PETRI_TRANSITIONS=867} [2024-06-28 03:30:07,695 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 467 predicate places. [2024-06-28 03:30:07,695 INFO L495 AbstractCegarLoop]: Abstraction has has 510 places, 867 transitions, 14058 flow [2024-06-28 03:30:07,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:30:07,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:30:07,696 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:30:07,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-28 03:30:07,696 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)] === [2024-06-28 03:30:07,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:30:07,696 INFO L85 PathProgramCache]: Analyzing trace with hash 116524689, now seen corresponding path program 6 times [2024-06-28 03:30:07,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:30:07,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958978462] [2024-06-28 03:30:07,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:30:07,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:30:07,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:30:08,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:30:08,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:30:08,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958978462] [2024-06-28 03:30:08,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958978462] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:30:08,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:30:08,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:30:08,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994756761] [2024-06-28 03:30:08,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:30:08,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:30:08,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:30:08,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:30:08,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:30:08,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:30:08,718 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 510 places, 867 transitions, 14058 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:30:08,718 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:30:08,718 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:30:08,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:30:11,220 INFO L124 PetriNetUnfolderBase]: 5255/7992 cut-off events. [2024-06-28 03:30:11,221 INFO L125 PetriNetUnfolderBase]: For 1887928/1887932 co-relation queries the response was YES. [2024-06-28 03:30:11,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84966 conditions, 7992 events. 5255/7992 cut-off events. For 1887928/1887932 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 46210 event pairs, 1553 based on Foata normal form. 5/7996 useless extension candidates. Maximal degree in co-relation 84744. Up to 7732 conditions per place. [2024-06-28 03:30:11,351 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 752 selfloop transitions, 129 changer transitions 0/884 dead transitions. [2024-06-28 03:30:11,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 517 places, 884 transitions, 16374 flow [2024-06-28 03:30:11,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:30:11,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:30:11,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-28 03:30:11,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-28 03:30:11,353 INFO L175 Difference]: Start difference. First operand has 510 places, 867 transitions, 14058 flow. Second operand 8 states and 135 transitions. [2024-06-28 03:30:11,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 517 places, 884 transitions, 16374 flow [2024-06-28 03:30:16,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 511 places, 884 transitions, 16204 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-28 03:30:16,219 INFO L231 Difference]: Finished difference. Result has 512 places, 867 transitions, 14160 flow [2024-06-28 03:30:16,220 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13892, PETRI_DIFFERENCE_MINUEND_PLACES=504, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=867, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=738, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=14160, PETRI_PLACES=512, PETRI_TRANSITIONS=867} [2024-06-28 03:30:16,220 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 469 predicate places. [2024-06-28 03:30:16,220 INFO L495 AbstractCegarLoop]: Abstraction has has 512 places, 867 transitions, 14160 flow [2024-06-28 03:30:16,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:30:16,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:30:16,221 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:30:16,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-28 03:30:16,221 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)] === [2024-06-28 03:30:16,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:30:16,221 INFO L85 PathProgramCache]: Analyzing trace with hash -466200315, now seen corresponding path program 8 times [2024-06-28 03:30:16,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:30:16,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90450367] [2024-06-28 03:30:16,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:30:16,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:30:16,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:30:17,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:30:17,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:30:17,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90450367] [2024-06-28 03:30:17,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90450367] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:30:17,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:30:17,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:30:17,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272726867] [2024-06-28 03:30:17,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:30:17,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:30:17,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:30:17,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:30:17,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:30:17,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:30:17,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 512 places, 867 transitions, 14160 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-28 03:30:17,544 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:30:17,544 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:30:17,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:30:20,196 INFO L124 PetriNetUnfolderBase]: 5262/8072 cut-off events. [2024-06-28 03:30:20,196 INFO L125 PetriNetUnfolderBase]: For 1906660/1906660 co-relation queries the response was YES. [2024-06-28 03:30:20,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85518 conditions, 8072 events. 5262/8072 cut-off events. For 1906660/1906660 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 47606 event pairs, 1852 based on Foata normal form. 2/8073 useless extension candidates. Maximal degree in co-relation 85296. Up to 7582 conditions per place. [2024-06-28 03:30:20,327 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 764 selfloop transitions, 105 changer transitions 0/917 dead transitions. [2024-06-28 03:30:20,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 521 places, 917 transitions, 16508 flow [2024-06-28 03:30:20,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:30:20,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:30:20,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 171 transitions. [2024-06-28 03:30:20,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40714285714285714 [2024-06-28 03:30:20,328 INFO L175 Difference]: Start difference. First operand has 512 places, 867 transitions, 14160 flow. Second operand 10 states and 171 transitions. [2024-06-28 03:30:20,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 521 places, 917 transitions, 16508 flow [2024-06-28 03:30:25,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 513 places, 917 transitions, 16243 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-28 03:30:25,119 INFO L231 Difference]: Finished difference. Result has 515 places, 889 transitions, 14454 flow [2024-06-28 03:30:25,119 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13897, PETRI_DIFFERENCE_MINUEND_PLACES=504, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=867, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=764, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14454, PETRI_PLACES=515, PETRI_TRANSITIONS=889} [2024-06-28 03:30:25,120 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 472 predicate places. [2024-06-28 03:30:25,120 INFO L495 AbstractCegarLoop]: Abstraction has has 515 places, 889 transitions, 14454 flow [2024-06-28 03:30:25,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-28 03:30:25,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:30:25,120 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:30:25,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-28 03:30:25,121 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)] === [2024-06-28 03:30:25,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:30:25,139 INFO L85 PathProgramCache]: Analyzing trace with hash -465961305, now seen corresponding path program 9 times [2024-06-28 03:30:25,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:30:25,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937892707] [2024-06-28 03:30:25,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:30:25,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:30:25,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:30:26,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:30:26,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:30:26,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937892707] [2024-06-28 03:30:26,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937892707] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:30:26,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:30:26,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:30:26,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514376625] [2024-06-28 03:30:26,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:30:26,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:30:26,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:30:26,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:30:26,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:30:26,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:30:26,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 515 places, 889 transitions, 14454 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-28 03:30:26,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:30:26,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:30:26,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:30:29,116 INFO L124 PetriNetUnfolderBase]: 5278/8100 cut-off events. [2024-06-28 03:30:29,116 INFO L125 PetriNetUnfolderBase]: For 1907060/1907060 co-relation queries the response was YES. [2024-06-28 03:30:29,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85926 conditions, 8100 events. 5278/8100 cut-off events. For 1907060/1907060 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 47854 event pairs, 1862 based on Foata normal form. 2/8101 useless extension candidates. Maximal degree in co-relation 85703. Up to 7710 conditions per place. [2024-06-28 03:30:29,251 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 779 selfloop transitions, 88 changer transitions 0/915 dead transitions. [2024-06-28 03:30:29,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 524 places, 915 transitions, 16345 flow [2024-06-28 03:30:29,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:30:29,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:30:29,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 165 transitions. [2024-06-28 03:30:29,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-28 03:30:29,252 INFO L175 Difference]: Start difference. First operand has 515 places, 889 transitions, 14454 flow. Second operand 10 states and 165 transitions. [2024-06-28 03:30:29,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 524 places, 915 transitions, 16345 flow