./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix003_power.opt_pso.opt_rmo.opt_tso.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/mix003_power.opt_pso.opt_rmo.opt_tso.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix003_power.opt_pso.opt_rmo.opt_tso.opt.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/mix003_power.opt_pso.opt_rmo.opt_tso.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-eb4cb34-m [2024-06-21 20:31:10,524 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 20:31:10,611 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 20:31:10,615 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 20:31:10,615 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 20:31:10,640 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 20:31:10,641 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 20:31:10,641 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 20:31:10,642 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 20:31:10,645 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 20:31:10,646 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 20:31:10,646 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 20:31:10,647 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 20:31:10,648 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 20:31:10,648 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 20:31:10,648 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 20:31:10,649 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 20:31:10,649 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 20:31:10,649 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 20:31:10,649 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 20:31:10,649 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 20:31:10,650 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 20:31:10,650 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 20:31:10,650 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 20:31:10,650 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 20:31:10,651 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 20:31:10,651 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 20:31:10,651 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 20:31:10,652 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 20:31:10,652 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 20:31:10,653 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 20:31:10,653 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 20:31:10,653 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 20:31:10,653 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 20:31:10,654 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 20:31:10,654 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 20:31:10,654 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 20:31:10,654 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 20:31:10,654 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 20:31:10,654 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 20:31:10,655 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 20:31:10,655 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 20:31:10,655 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 20:31:10,655 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 20:31:10,842 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 20:31:10,856 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 20:31:10,858 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 20:31:10,859 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 20:31:10,860 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 20:31:10,861 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/mix003_power.opt_pso.opt_rmo.opt_tso.opt.yml/witness.yml [2024-06-21 20:31:11,028 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 20:31:11,029 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 20:31:11,030 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix003_power.opt_pso.opt_rmo.opt_tso.opt.i [2024-06-21 20:31:12,180 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 20:31:12,386 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 20:31:12,393 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix003_power.opt_pso.opt_rmo.opt_tso.opt.i [2024-06-21 20:31:12,413 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e273793fa/d8c9981229b84e7b94c8e6fbcdd8e3ea/FLAGf51cfb662 [2024-06-21 20:31:12,424 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e273793fa/d8c9981229b84e7b94c8e6fbcdd8e3ea [2024-06-21 20:31:12,425 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 20:31:12,426 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 20:31:12,428 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 20:31:12,428 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 20:31:12,432 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 20:31:12,433 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 08:31:11" (1/2) ... [2024-06-21 20:31:12,434 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11b14d2d and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:31:12, skipping insertion in model container [2024-06-21 20:31:12,434 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 08:31:11" (1/2) ... [2024-06-21 20:31:12,435 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7d49a7f8 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:31:12, skipping insertion in model container [2024-06-21 20:31:12,436 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 08:31:12" (2/2) ... [2024-06-21 20:31:12,436 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11b14d2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:31:12, skipping insertion in model container [2024-06-21 20:31:12,436 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 08:31:12" (2/2) ... [2024-06-21 20:31:12,437 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 20:31:12,518 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 20:31:12,519 INFO L97 edCorrectnessWitness]: Location invariant before [L851-L851] ((((((((((((((((((((! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)) && (! multithreaded || ((((((((((((((((((((0 <= __unbuffered_cnt && y$flush_delayed == (_Bool)0) && y$r_buff0_thd0 == (_Bool)0) && y$r_buff0_thd1 == (_Bool)0) && y$r_buff0_thd2 == (_Bool)0) && y$r_buff1_thd0 == (_Bool)0) && y$r_buff1_thd1 == (_Bool)0) && y$r_buff1_thd2 == (_Bool)0) && y$read_delayed == (_Bool)0) && y$read_delayed_var == 0) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1)) && (y$mem_tmp == 0 || y$mem_tmp == 1)) && (y$w_buff0 == 0 || y$w_buff0 == 1)) && (y$w_buff1 == 0 || y$w_buff1 == 1)) && (z == 0 || z == 1)))) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 1))) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || (y$mem_tmp == 0 || y$mem_tmp == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 1))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0) [2024-06-21 20:31:12,520 INFO L97 edCorrectnessWitness]: Location invariant before [L854-L854] ((((((((((((((((((((! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)) && (! multithreaded || ((((((((((((((((((((0 <= __unbuffered_cnt && y$flush_delayed == (_Bool)0) && y$r_buff0_thd0 == (_Bool)0) && y$r_buff0_thd1 == (_Bool)0) && y$r_buff0_thd2 == (_Bool)0) && y$r_buff1_thd0 == (_Bool)0) && y$r_buff1_thd1 == (_Bool)0) && y$r_buff1_thd2 == (_Bool)0) && y$read_delayed == (_Bool)0) && y$read_delayed_var == 0) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1)) && (y$mem_tmp == 0 || y$mem_tmp == 1)) && (y$w_buff0 == 0 || y$w_buff0 == 1)) && (y$w_buff1 == 0 || y$w_buff1 == 1)) && (z == 0 || z == 1)))) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 1))) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || (y$mem_tmp == 0 || y$mem_tmp == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 1))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0) [2024-06-21 20:31:12,520 INFO L97 edCorrectnessWitness]: Location invariant before [L853-L853] ((((((((((((((((((((! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)) && (! multithreaded || ((((((((((((((((((((0 <= __unbuffered_cnt && y$flush_delayed == (_Bool)0) && y$r_buff0_thd0 == (_Bool)0) && y$r_buff0_thd1 == (_Bool)0) && y$r_buff0_thd2 == (_Bool)0) && y$r_buff1_thd0 == (_Bool)0) && y$r_buff1_thd1 == (_Bool)0) && y$r_buff1_thd2 == (_Bool)0) && y$read_delayed == (_Bool)0) && y$read_delayed_var == 0) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1)) && (y$mem_tmp == 0 || y$mem_tmp == 1)) && (y$w_buff0 == 0 || y$w_buff0 == 1)) && (y$w_buff1 == 0 || y$w_buff1 == 1)) && (z == 0 || z == 1)))) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 1))) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || (y$mem_tmp == 0 || y$mem_tmp == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 1))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0) [2024-06-21 20:31:12,520 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 20:31:12,520 INFO L106 edCorrectnessWitness]: ghost_update [L849-L849] multithreaded = 1; [2024-06-21 20:31:12,557 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 20:31:12,899 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 20:31:12,906 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 20:31:13,013 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 20:31:13,041 INFO L206 MainTranslator]: Completed translation [2024-06-21 20:31:13,041 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:31:13 WrapperNode [2024-06-21 20:31:13,041 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 20:31:13,042 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 20:31:13,042 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 20:31:13,042 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 20:31:13,048 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:31:13" (1/1) ... [2024-06-21 20:31:13,061 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:31:13" (1/1) ... [2024-06-21 20:31:13,101 INFO L138 Inliner]: procedures = 175, calls = 47, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 150 [2024-06-21 20:31:13,101 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 20:31:13,102 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 20:31:13,102 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 20:31:13,102 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 20:31:13,111 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:31:13" (1/1) ... [2024-06-21 20:31:13,112 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:31:13" (1/1) ... [2024-06-21 20:31:13,116 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:31:13" (1/1) ... [2024-06-21 20:31:13,133 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]. [2024-06-21 20:31:13,134 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:31:13" (1/1) ... [2024-06-21 20:31:13,134 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:31:13" (1/1) ... [2024-06-21 20:31:13,152 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:31:13" (1/1) ... [2024-06-21 20:31:13,154 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:31:13" (1/1) ... [2024-06-21 20:31:13,156 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:31:13" (1/1) ... [2024-06-21 20:31:13,157 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:31:13" (1/1) ... [2024-06-21 20:31:13,161 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 20:31:13,162 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 20:31:13,162 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 20:31:13,162 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 20:31:13,163 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:31:13" (1/1) ... [2024-06-21 20:31:13,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 20:31:13,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 20:31:13,214 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-21 20:31:13,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-21 20:31:13,274 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 20:31:13,275 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 20:31:13,275 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 20:31:13,275 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 20:31:13,275 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 20:31:13,275 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 20:31:13,275 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 20:31:13,276 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 20:31:13,276 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 20:31:13,276 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 20:31:13,276 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 20:31:13,277 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 20:31:13,278 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 20:31:13,423 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 20:31:13,424 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 20:31:13,704 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 20:31:13,705 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 20:31:13,862 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 20:31:13,863 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 20:31:13,864 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 08:31:13 BoogieIcfgContainer [2024-06-21 20:31:13,864 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 20:31:13,867 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 20:31:13,867 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 20:31:13,870 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 20:31:13,870 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 08:31:11" (1/4) ... [2024-06-21 20:31:13,870 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13402db2 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 08:31:13, skipping insertion in model container [2024-06-21 20:31:13,870 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 08:31:12" (2/4) ... [2024-06-21 20:31:13,871 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13402db2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 08:31:13, skipping insertion in model container [2024-06-21 20:31:13,871 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:31:13" (3/4) ... [2024-06-21 20:31:13,871 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13402db2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 08:31:13, skipping insertion in model container [2024-06-21 20:31:13,871 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 08:31:13" (4/4) ... [2024-06-21 20:31:13,872 INFO L112 eAbstractionObserver]: Analyzing ICFG mix003_power.opt_pso.opt_rmo.opt_tso.opt.i [2024-06-21 20:31:13,886 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 20:31:13,887 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-21 20:31:13,887 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 20:31:13,928 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 20:31:13,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-21 20:31:13,978 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-21 20:31:13,978 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 20:31:13,980 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 65 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. [2024-06-21 20:31:13,980 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-21 20:31:13,982 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-21 20:31:13,988 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 20:31:13,993 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;@1e2fd7b4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 20:31:13,993 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-21 20:31:13,996 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 20:31:13,996 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 20:31:13,997 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 20:31:13,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:31:13,997 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 20:31:13,998 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:31:14,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:31:14,002 INFO L85 PathProgramCache]: Analyzing trace with hash 402799615, now seen corresponding path program 1 times [2024-06-21 20:31:14,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:31:14,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443492402] [2024-06-21 20:31:14,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:31:14,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:31:14,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:31:15,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:31:15,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:31:15,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443492402] [2024-06-21 20:31:15,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443492402] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:31:15,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:31:15,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 20:31:15,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824028211] [2024-06-21 20:31:15,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:31:15,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 20:31:15,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:31:15,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 20:31:15,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 20:31:15,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-21 20:31:15,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:31:15,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:31:15,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-21 20:31:15,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:31:15,410 INFO L124 PetriNetUnfolderBase]: 869/1405 cut-off events. [2024-06-21 20:31:15,410 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2024-06-21 20:31:15,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2783 conditions, 1405 events. 869/1405 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 7205 event pairs, 566 based on Foata normal form. 1/1355 useless extension candidates. Maximal degree in co-relation 2771. Up to 1315 conditions per place. [2024-06-21 20:31:15,424 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 30 selfloop transitions, 4 changer transitions 0/43 dead transitions. [2024-06-21 20:31:15,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 43 transitions, 169 flow [2024-06-21 20:31:15,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 20:31:15,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 20:31:15,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 82 transitions. [2024-06-21 20:31:15,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6507936507936508 [2024-06-21 20:31:15,436 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 82 transitions. [2024-06-21 20:31:15,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 43 transitions, 169 flow [2024-06-21 20:31:15,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 43 transitions, 164 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 20:31:15,441 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-21 20:31:15,443 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} [2024-06-21 20:31:15,445 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-21 20:31:15,446 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-21 20:31:15,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:31:15,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:31:15,446 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:31:15,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 20:31:15,447 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:31:15,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:31:15,449 INFO L85 PathProgramCache]: Analyzing trace with hash 543408094, now seen corresponding path program 1 times [2024-06-21 20:31:15,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:31:15,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433150602] [2024-06-21 20:31:15,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:31:15,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:31:15,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:31:16,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:31:16,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:31:16,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433150602] [2024-06-21 20:31:16,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433150602] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:31:16,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:31:16,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 20:31:16,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781038299] [2024-06-21 20:31:16,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:31:16,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 20:31:16,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:31:16,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 20:31:16,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 20:31:16,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-21 20:31:16,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:31:16,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:31:16,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-21 20:31:16,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:31:16,541 INFO L124 PetriNetUnfolderBase]: 996/1571 cut-off events. [2024-06-21 20:31:16,542 INFO L125 PetriNetUnfolderBase]: For 338/338 co-relation queries the response was YES. [2024-06-21 20:31:16,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3586 conditions, 1571 events. 996/1571 cut-off events. For 338/338 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 7909 event pairs, 519 based on Foata normal form. 3/1570 useless extension candidates. Maximal degree in co-relation 3574. Up to 1484 conditions per place. [2024-06-21 20:31:16,550 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 38 selfloop transitions, 7 changer transitions 0/53 dead transitions. [2024-06-21 20:31:16,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 53 transitions, 238 flow [2024-06-21 20:31:16,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 20:31:16,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 20:31:16,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 104 transitions. [2024-06-21 20:31:16,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-21 20:31:16,555 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 104 transitions. [2024-06-21 20:31:16,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 53 transitions, 238 flow [2024-06-21 20:31:16,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 53 transitions, 234 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 20:31:16,558 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 138 flow [2024-06-21 20:31:16,559 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} [2024-06-21 20:31:16,559 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2024-06-21 20:31:16,560 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 138 flow [2024-06-21 20:31:16,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:31:16,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:31:16,561 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:31:16,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 20:31:16,563 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:31:16,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:31:16,566 INFO L85 PathProgramCache]: Analyzing trace with hash 939928731, now seen corresponding path program 1 times [2024-06-21 20:31:16,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:31:16,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166022398] [2024-06-21 20:31:16,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:31:16,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:31:16,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:31:17,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:31:17,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:31:17,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166022398] [2024-06-21 20:31:17,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166022398] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:31:17,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:31:17,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:31:17,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772548924] [2024-06-21 20:31:17,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:31:17,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:31:17,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:31:17,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:31:17,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:31:17,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 42 [2024-06-21 20:31:17,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 138 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:31:17,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:31:17,848 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 42 [2024-06-21 20:31:17,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:31:18,139 INFO L124 PetriNetUnfolderBase]: 1265/1958 cut-off events. [2024-06-21 20:31:18,139 INFO L125 PetriNetUnfolderBase]: For 1122/1122 co-relation queries the response was YES. [2024-06-21 20:31:18,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4955 conditions, 1958 events. 1265/1958 cut-off events. For 1122/1122 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 9644 event pairs, 445 based on Foata normal form. 6/1957 useless extension candidates. Maximal degree in co-relation 4941. Up to 1828 conditions per place. [2024-06-21 20:31:18,150 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 50 selfloop transitions, 12 changer transitions 0/69 dead transitions. [2024-06-21 20:31:18,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 69 transitions, 350 flow [2024-06-21 20:31:18,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:31:18,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:31:18,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-21 20:31:18,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5674603174603174 [2024-06-21 20:31:18,153 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 138 flow. Second operand 6 states and 143 transitions. [2024-06-21 20:31:18,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 69 transitions, 350 flow [2024-06-21 20:31:18,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 69 transitions, 330 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-21 20:31:18,156 INFO L231 Difference]: Finished difference. Result has 50 places, 43 transitions, 181 flow [2024-06-21 20:31:18,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=181, PETRI_PLACES=50, PETRI_TRANSITIONS=43} [2024-06-21 20:31:18,157 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 7 predicate places. [2024-06-21 20:31:18,157 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 181 flow [2024-06-21 20:31:18,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:31:18,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:31:18,157 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:31:18,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 20:31:18,158 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:31:18,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:31:18,158 INFO L85 PathProgramCache]: Analyzing trace with hash 328322472, now seen corresponding path program 1 times [2024-06-21 20:31:18,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:31:18,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107127468] [2024-06-21 20:31:18,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:31:18,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:31:18,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:31:18,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:31:18,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:31:18,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107127468] [2024-06-21 20:31:18,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107127468] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:31:18,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:31:18,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:31:18,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686689061] [2024-06-21 20:31:18,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:31:18,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:31:18,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:31:18,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:31:18,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:31:18,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 20:31:18,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 181 flow. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:31:18,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:31:18,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 20:31:18,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:31:19,167 INFO L124 PetriNetUnfolderBase]: 1333/2084 cut-off events. [2024-06-21 20:31:19,167 INFO L125 PetriNetUnfolderBase]: For 2120/2120 co-relation queries the response was YES. [2024-06-21 20:31:19,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5738 conditions, 2084 events. 1333/2084 cut-off events. For 2120/2120 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 10313 event pairs, 592 based on Foata normal form. 2/2054 useless extension candidates. Maximal degree in co-relation 5721. Up to 1980 conditions per place. [2024-06-21 20:31:19,178 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 43 selfloop transitions, 8 changer transitions 0/57 dead transitions. [2024-06-21 20:31:19,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 57 transitions, 325 flow [2024-06-21 20:31:19,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:31:19,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:31:19,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 100 transitions. [2024-06-21 20:31:19,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-21 20:31:19,180 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 181 flow. Second operand 5 states and 100 transitions. [2024-06-21 20:31:19,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 57 transitions, 325 flow [2024-06-21 20:31:19,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 57 transitions, 298 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-21 20:31:19,182 INFO L231 Difference]: Finished difference. Result has 52 places, 46 transitions, 198 flow [2024-06-21 20:31:19,182 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=198, PETRI_PLACES=52, PETRI_TRANSITIONS=46} [2024-06-21 20:31:19,183 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 9 predicate places. [2024-06-21 20:31:19,183 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 46 transitions, 198 flow [2024-06-21 20:31:19,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:31:19,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:31:19,184 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:31:19,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 20:31:19,184 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:31:19,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:31:19,185 INFO L85 PathProgramCache]: Analyzing trace with hash 1588063522, now seen corresponding path program 1 times [2024-06-21 20:31:19,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:31:19,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790507428] [2024-06-21 20:31:19,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:31:19,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:31:19,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:31:19,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:31:19,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:31:19,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790507428] [2024-06-21 20:31:19,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790507428] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:31:19,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:31:19,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:31:19,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343308627] [2024-06-21 20:31:19,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:31:19,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:31:19,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:31:19,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:31:19,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:31:19,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 20:31:19,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 46 transitions, 198 flow. Second operand has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:31:19,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:31:19,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 20:31:19,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:31:20,397 INFO L124 PetriNetUnfolderBase]: 1323/2106 cut-off events. [2024-06-21 20:31:20,397 INFO L125 PetriNetUnfolderBase]: For 3099/3099 co-relation queries the response was YES. [2024-06-21 20:31:20,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6175 conditions, 2106 events. 1323/2106 cut-off events. For 3099/3099 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 10629 event pairs, 556 based on Foata normal form. 4/2100 useless extension candidates. Maximal degree in co-relation 6156. Up to 1948 conditions per place. [2024-06-21 20:31:20,408 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 48 selfloop transitions, 11 changer transitions 0/65 dead transitions. [2024-06-21 20:31:20,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 65 transitions, 374 flow [2024-06-21 20:31:20,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:31:20,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:31:20,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 119 transitions. [2024-06-21 20:31:20,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4722222222222222 [2024-06-21 20:31:20,410 INFO L175 Difference]: Start difference. First operand has 52 places, 46 transitions, 198 flow. Second operand 6 states and 119 transitions. [2024-06-21 20:31:20,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 65 transitions, 374 flow [2024-06-21 20:31:20,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 65 transitions, 354 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-21 20:31:20,413 INFO L231 Difference]: Finished difference. Result has 55 places, 49 transitions, 232 flow [2024-06-21 20:31:20,413 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=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=232, PETRI_PLACES=55, PETRI_TRANSITIONS=49} [2024-06-21 20:31:20,413 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 12 predicate places. [2024-06-21 20:31:20,414 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 49 transitions, 232 flow [2024-06-21 20:31:20,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:31:20,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:31:20,414 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:31:20,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 20:31:20,414 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:31:20,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:31:20,415 INFO L85 PathProgramCache]: Analyzing trace with hash -675752907, now seen corresponding path program 1 times [2024-06-21 20:31:20,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:31:20,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209073069] [2024-06-21 20:31:20,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:31:20,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:31:20,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:31:21,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:31:21,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:31:21,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209073069] [2024-06-21 20:31:21,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209073069] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:31:21,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:31:21,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:31:21,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994793964] [2024-06-21 20:31:21,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:31:21,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:31:21,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:31:21,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:31:21,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:31:21,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:31:21,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 49 transitions, 232 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) [2024-06-21 20:31:21,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:31:21,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:31:21,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:31:21,601 INFO L124 PetriNetUnfolderBase]: 1541/2334 cut-off events. [2024-06-21 20:31:21,601 INFO L125 PetriNetUnfolderBase]: For 5231/5235 co-relation queries the response was YES. [2024-06-21 20:31:21,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7553 conditions, 2334 events. 1541/2334 cut-off events. For 5231/5235 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 11223 event pairs, 656 based on Foata normal form. 6/2338 useless extension candidates. Maximal degree in co-relation 7533. Up to 2244 conditions per place. [2024-06-21 20:31:21,615 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 54 selfloop transitions, 16 changer transitions 0/75 dead transitions. [2024-06-21 20:31:21,615 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 75 transitions, 482 flow [2024-06-21 20:31:21,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:31:21,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:31:21,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 120 transitions. [2024-06-21 20:31:21,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-21 20:31:21,616 INFO L175 Difference]: Start difference. First operand has 55 places, 49 transitions, 232 flow. Second operand 6 states and 120 transitions. [2024-06-21 20:31:21,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 75 transitions, 482 flow [2024-06-21 20:31:21,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 75 transitions, 452 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-21 20:31:21,621 INFO L231 Difference]: Finished difference. Result has 57 places, 55 transitions, 288 flow [2024-06-21 20:31:21,621 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=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=288, PETRI_PLACES=57, PETRI_TRANSITIONS=55} [2024-06-21 20:31:21,624 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 14 predicate places. [2024-06-21 20:31:21,624 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 55 transitions, 288 flow [2024-06-21 20:31:21,624 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) [2024-06-21 20:31:21,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:31:21,624 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:31:21,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 20:31:21,624 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:31:21,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:31:21,625 INFO L85 PathProgramCache]: Analyzing trace with hash -1965558743, now seen corresponding path program 2 times [2024-06-21 20:31:21,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:31:21,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145835392] [2024-06-21 20:31:21,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:31:21,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:31:21,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:31:22,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:31:22,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:31:22,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145835392] [2024-06-21 20:31:22,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145835392] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:31:22,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:31:22,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:31:22,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201746357] [2024-06-21 20:31:22,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:31:22,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:31:22,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:31:22,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:31:22,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:31:22,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:31:22,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 55 transitions, 288 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) [2024-06-21 20:31:22,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:31:22,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:31:22,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:31:22,792 INFO L124 PetriNetUnfolderBase]: 1536/2328 cut-off events. [2024-06-21 20:31:22,792 INFO L125 PetriNetUnfolderBase]: For 6984/6989 co-relation queries the response was YES. [2024-06-21 20:31:22,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8050 conditions, 2328 events. 1536/2328 cut-off events. For 6984/6989 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 11223 event pairs, 659 based on Foata normal form. 6/2331 useless extension candidates. Maximal degree in co-relation 8029. Up to 2239 conditions per place. [2024-06-21 20:31:22,808 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 49 selfloop transitions, 16 changer transitions 0/70 dead transitions. [2024-06-21 20:31:22,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 70 transitions, 456 flow [2024-06-21 20:31:22,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:31:22,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:31:22,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 115 transitions. [2024-06-21 20:31:22,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45634920634920634 [2024-06-21 20:31:22,810 INFO L175 Difference]: Start difference. First operand has 57 places, 55 transitions, 288 flow. Second operand 6 states and 115 transitions. [2024-06-21 20:31:22,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 70 transitions, 456 flow [2024-06-21 20:31:22,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 70 transitions, 422 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-06-21 20:31:22,817 INFO L231 Difference]: Finished difference. Result has 61 places, 55 transitions, 294 flow [2024-06-21 20:31:22,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=254, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=294, PETRI_PLACES=61, PETRI_TRANSITIONS=55} [2024-06-21 20:31:22,818 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 18 predicate places. [2024-06-21 20:31:22,818 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 55 transitions, 294 flow [2024-06-21 20:31:22,818 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) [2024-06-21 20:31:22,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:31:22,818 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:31:22,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 20:31:22,819 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:31:22,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:31:22,819 INFO L85 PathProgramCache]: Analyzing trace with hash 368445591, now seen corresponding path program 1 times [2024-06-21 20:31:22,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:31:22,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148635054] [2024-06-21 20:31:22,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:31:22,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:31:22,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:31:23,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:31:23,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:31:23,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148635054] [2024-06-21 20:31:23,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148635054] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:31:23,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:31:23,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:31:23,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410669697] [2024-06-21 20:31:23,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:31:23,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:31:23,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:31:23,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:31:23,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:31:23,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:31:23,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 55 transitions, 294 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) [2024-06-21 20:31:23,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:31:23,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:31:23,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:31:24,130 INFO L124 PetriNetUnfolderBase]: 1583/2406 cut-off events. [2024-06-21 20:31:24,131 INFO L125 PetriNetUnfolderBase]: For 8272/8274 co-relation queries the response was YES. [2024-06-21 20:31:24,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8454 conditions, 2406 events. 1583/2406 cut-off events. For 8272/8274 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 11610 event pairs, 652 based on Foata normal form. 4/2408 useless extension candidates. Maximal degree in co-relation 8431. Up to 2291 conditions per place. [2024-06-21 20:31:24,147 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 66 selfloop transitions, 24 changer transitions 0/95 dead transitions. [2024-06-21 20:31:24,148 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 95 transitions, 628 flow [2024-06-21 20:31:24,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:31:24,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:31:24,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-21 20:31:24,149 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-21 20:31:24,149 INFO L175 Difference]: Start difference. First operand has 61 places, 55 transitions, 294 flow. Second operand 8 states and 154 transitions. [2024-06-21 20:31:24,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 95 transitions, 628 flow [2024-06-21 20:31:24,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 95 transitions, 572 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-21 20:31:24,163 INFO L231 Difference]: Finished difference. Result has 65 places, 69 transitions, 406 flow [2024-06-21 20:31:24,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=406, PETRI_PLACES=65, PETRI_TRANSITIONS=69} [2024-06-21 20:31:24,165 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 22 predicate places. [2024-06-21 20:31:24,165 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 69 transitions, 406 flow [2024-06-21 20:31:24,165 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) [2024-06-21 20:31:24,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:31:24,165 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:31:24,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 20:31:24,165 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:31:24,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:31:24,166 INFO L85 PathProgramCache]: Analyzing trace with hash 1238320575, now seen corresponding path program 2 times [2024-06-21 20:31:24,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:31:24,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071427729] [2024-06-21 20:31:24,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:31:24,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:31:24,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:31:24,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:31:24,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:31:24,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071427729] [2024-06-21 20:31:24,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071427729] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:31:24,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:31:24,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:31:24,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351572551] [2024-06-21 20:31:24,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:31:24,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:31:24,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:31:24,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:31:24,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:31:25,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:31:25,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 69 transitions, 406 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) [2024-06-21 20:31:25,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:31:25,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:31:25,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:31:25,534 INFO L124 PetriNetUnfolderBase]: 1594/2427 cut-off events. [2024-06-21 20:31:25,534 INFO L125 PetriNetUnfolderBase]: For 10700/10704 co-relation queries the response was YES. [2024-06-21 20:31:25,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9160 conditions, 2427 events. 1594/2427 cut-off events. For 10700/10704 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 11784 event pairs, 631 based on Foata normal form. 6/2431 useless extension candidates. Maximal degree in co-relation 9135. Up to 2293 conditions per place. [2024-06-21 20:31:25,547 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 66 selfloop transitions, 26 changer transitions 0/97 dead transitions. [2024-06-21 20:31:25,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 97 transitions, 702 flow [2024-06-21 20:31:25,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:31:25,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:31:25,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-21 20:31:25,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46258503401360546 [2024-06-21 20:31:25,549 INFO L175 Difference]: Start difference. First operand has 65 places, 69 transitions, 406 flow. Second operand 7 states and 136 transitions. [2024-06-21 20:31:25,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 97 transitions, 702 flow [2024-06-21 20:31:25,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 97 transitions, 660 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-21 20:31:25,555 INFO L231 Difference]: Finished difference. Result has 69 places, 72 transitions, 465 flow [2024-06-21 20:31:25,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=364, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=465, PETRI_PLACES=69, PETRI_TRANSITIONS=72} [2024-06-21 20:31:25,556 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 26 predicate places. [2024-06-21 20:31:25,556 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 72 transitions, 465 flow [2024-06-21 20:31:25,556 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) [2024-06-21 20:31:25,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:31:25,556 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:31:25,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 20:31:25,557 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:31:25,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:31:25,557 INFO L85 PathProgramCache]: Analyzing trace with hash 1409027841, now seen corresponding path program 1 times [2024-06-21 20:31:25,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:31:25,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940348397] [2024-06-21 20:31:25,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:31:25,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:31:25,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:31:26,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:31:26,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:31:26,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940348397] [2024-06-21 20:31:26,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940348397] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:31:26,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:31:26,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:31:26,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821790073] [2024-06-21 20:31:26,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:31:26,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:31:26,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:31:26,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:31:26,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:31:26,427 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:31:26,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 72 transitions, 465 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) [2024-06-21 20:31:26,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:31:26,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:31:26,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:31:27,011 INFO L124 PetriNetUnfolderBase]: 1616/2460 cut-off events. [2024-06-21 20:31:27,012 INFO L125 PetriNetUnfolderBase]: For 13819/13827 co-relation queries the response was YES. [2024-06-21 20:31:27,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9854 conditions, 2460 events. 1616/2460 cut-off events. For 13819/13827 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 11890 event pairs, 583 based on Foata normal form. 9/2467 useless extension candidates. Maximal degree in co-relation 9828. Up to 2277 conditions per place. [2024-06-21 20:31:27,026 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 75 selfloop transitions, 26 changer transitions 0/106 dead transitions. [2024-06-21 20:31:27,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 106 transitions, 841 flow [2024-06-21 20:31:27,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:31:27,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:31:27,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 142 transitions. [2024-06-21 20:31:27,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48299319727891155 [2024-06-21 20:31:27,028 INFO L175 Difference]: Start difference. First operand has 69 places, 72 transitions, 465 flow. Second operand 7 states and 142 transitions. [2024-06-21 20:31:27,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 106 transitions, 841 flow [2024-06-21 20:31:27,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 106 transitions, 762 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-21 20:31:27,036 INFO L231 Difference]: Finished difference. Result has 71 places, 78 transitions, 508 flow [2024-06-21 20:31:27,037 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=394, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=508, PETRI_PLACES=71, PETRI_TRANSITIONS=78} [2024-06-21 20:31:27,037 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 28 predicate places. [2024-06-21 20:31:27,037 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 78 transitions, 508 flow [2024-06-21 20:31:27,037 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) [2024-06-21 20:31:27,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:31:27,038 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:31:27,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 20:31:27,038 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:31:27,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:31:27,038 INFO L85 PathProgramCache]: Analyzing trace with hash 1238325225, now seen corresponding path program 3 times [2024-06-21 20:31:27,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:31:27,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621044790] [2024-06-21 20:31:27,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:31:27,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:31:27,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:31:27,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:31:27,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:31:27,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621044790] [2024-06-21 20:31:27,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621044790] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:31:27,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:31:27,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:31:27,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630260154] [2024-06-21 20:31:27,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:31:27,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:31:27,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:31:27,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:31:27,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:31:27,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:31:27,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 78 transitions, 508 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) [2024-06-21 20:31:27,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:31:27,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:31:27,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:31:28,385 INFO L124 PetriNetUnfolderBase]: 1627/2488 cut-off events. [2024-06-21 20:31:28,386 INFO L125 PetriNetUnfolderBase]: For 13726/13730 co-relation queries the response was YES. [2024-06-21 20:31:28,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9940 conditions, 2488 events. 1627/2488 cut-off events. For 13726/13730 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 12212 event pairs, 622 based on Foata normal form. 4/2490 useless extension candidates. Maximal degree in co-relation 9913. Up to 2289 conditions per place. [2024-06-21 20:31:28,400 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 65 selfloop transitions, 37 changer transitions 0/107 dead transitions. [2024-06-21 20:31:28,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 107 transitions, 880 flow [2024-06-21 20:31:28,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:31:28,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:31:28,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-06-21 20:31:28,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47278911564625853 [2024-06-21 20:31:28,402 INFO L175 Difference]: Start difference. First operand has 71 places, 78 transitions, 508 flow. Second operand 7 states and 139 transitions. [2024-06-21 20:31:28,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 107 transitions, 880 flow [2024-06-21 20:31:28,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 107 transitions, 847 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-21 20:31:28,412 INFO L231 Difference]: Finished difference. Result has 75 places, 84 transitions, 627 flow [2024-06-21 20:31:28,412 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=475, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=627, PETRI_PLACES=75, PETRI_TRANSITIONS=84} [2024-06-21 20:31:28,412 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 32 predicate places. [2024-06-21 20:31:28,413 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 84 transitions, 627 flow [2024-06-21 20:31:28,413 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) [2024-06-21 20:31:28,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:31:28,413 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:31:28,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 20:31:28,413 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:31:28,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:31:28,414 INFO L85 PathProgramCache]: Analyzing trace with hash -802540257, now seen corresponding path program 2 times [2024-06-21 20:31:28,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:31:28,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272954248] [2024-06-21 20:31:28,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:31:28,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:31:28,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:31:29,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:31:29,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:31:29,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272954248] [2024-06-21 20:31:29,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272954248] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:31:29,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:31:29,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:31:29,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144293660] [2024-06-21 20:31:29,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:31:29,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:31:29,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:31:29,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:31:29,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:31:29,245 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:31:29,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 84 transitions, 627 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) [2024-06-21 20:31:29,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:31:29,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:31:29,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:31:29,820 INFO L124 PetriNetUnfolderBase]: 1649/2523 cut-off events. [2024-06-21 20:31:29,820 INFO L125 PetriNetUnfolderBase]: For 17271/17280 co-relation queries the response was YES. [2024-06-21 20:31:29,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10701 conditions, 2523 events. 1649/2523 cut-off events. For 17271/17280 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 12375 event pairs, 578 based on Foata normal form. 12/2531 useless extension candidates. Maximal degree in co-relation 10672. Up to 2312 conditions per place. [2024-06-21 20:31:29,835 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 77 selfloop transitions, 30 changer transitions 0/112 dead transitions. [2024-06-21 20:31:29,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 112 transitions, 989 flow [2024-06-21 20:31:29,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:31:29,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:31:29,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-21 20:31:29,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46598639455782315 [2024-06-21 20:31:29,836 INFO L175 Difference]: Start difference. First operand has 75 places, 84 transitions, 627 flow. Second operand 7 states and 137 transitions. [2024-06-21 20:31:29,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 112 transitions, 989 flow [2024-06-21 20:31:29,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 112 transitions, 941 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-21 20:31:29,848 INFO L231 Difference]: Finished difference. Result has 79 places, 87 transitions, 677 flow [2024-06-21 20:31:29,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=579, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=677, PETRI_PLACES=79, PETRI_TRANSITIONS=87} [2024-06-21 20:31:29,849 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 36 predicate places. [2024-06-21 20:31:29,849 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 87 transitions, 677 flow [2024-06-21 20:31:29,849 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) [2024-06-21 20:31:29,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:31:29,849 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:31:29,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 20:31:29,849 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:31:29,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:31:29,850 INFO L85 PathProgramCache]: Analyzing trace with hash -1162950597, now seen corresponding path program 3 times [2024-06-21 20:31:29,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:31:29,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041107362] [2024-06-21 20:31:29,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:31:29,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:31:29,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:31:30,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:31:30,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:31:30,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041107362] [2024-06-21 20:31:30,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041107362] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:31:30,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:31:30,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:31:30,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500634468] [2024-06-21 20:31:30,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:31:30,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:31:30,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:31:30,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:31:30,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:31:30,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:31:30,524 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 87 transitions, 677 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) [2024-06-21 20:31:30,524 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:31:30,524 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:31:30,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:31:30,979 INFO L124 PetriNetUnfolderBase]: 1639/2509 cut-off events. [2024-06-21 20:31:30,979 INFO L125 PetriNetUnfolderBase]: For 19494/19503 co-relation queries the response was YES. [2024-06-21 20:31:30,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10920 conditions, 2509 events. 1639/2509 cut-off events. For 19494/19503 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 12286 event pairs, 576 based on Foata normal form. 12/2517 useless extension candidates. Maximal degree in co-relation 10889. Up to 2304 conditions per place. [2024-06-21 20:31:30,993 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 77 selfloop transitions, 29 changer transitions 0/111 dead transitions. [2024-06-21 20:31:30,994 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 111 transitions, 965 flow [2024-06-21 20:31:31,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:31:31,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:31:31,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-21 20:31:31,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46598639455782315 [2024-06-21 20:31:31,002 INFO L175 Difference]: Start difference. First operand has 79 places, 87 transitions, 677 flow. Second operand 7 states and 137 transitions. [2024-06-21 20:31:31,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 111 transitions, 965 flow [2024-06-21 20:31:31,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 111 transitions, 885 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-21 20:31:31,014 INFO L231 Difference]: Finished difference. Result has 82 places, 87 transitions, 663 flow [2024-06-21 20:31:31,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=597, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=663, PETRI_PLACES=82, PETRI_TRANSITIONS=87} [2024-06-21 20:31:31,015 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 39 predicate places. [2024-06-21 20:31:31,015 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 87 transitions, 663 flow [2024-06-21 20:31:31,015 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) [2024-06-21 20:31:31,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:31:31,015 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:31:31,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 20:31:31,015 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:31:31,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:31:31,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1415456745, now seen corresponding path program 4 times [2024-06-21 20:31:31,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:31:31,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976590160] [2024-06-21 20:31:31,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:31:31,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:31:31,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:31:31,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:31:31,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:31:31,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976590160] [2024-06-21 20:31:31,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976590160] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:31:31,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:31:31,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:31:31,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024701364] [2024-06-21 20:31:31,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:31:31,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:31:31,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:31:31,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:31:31,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:31:31,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:31:31,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 87 transitions, 663 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) [2024-06-21 20:31:31,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:31:31,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:31:31,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:31:32,306 INFO L124 PetriNetUnfolderBase]: 1634/2499 cut-off events. [2024-06-21 20:31:32,306 INFO L125 PetriNetUnfolderBase]: For 21615/21620 co-relation queries the response was YES. [2024-06-21 20:31:32,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11028 conditions, 2499 events. 1634/2499 cut-off events. For 21615/21620 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 12241 event pairs, 626 based on Foata normal form. 2/2495 useless extension candidates. Maximal degree in co-relation 10996. Up to 2302 conditions per place. [2024-06-21 20:31:32,319 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 64 selfloop transitions, 37 changer transitions 0/106 dead transitions. [2024-06-21 20:31:32,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 106 transitions, 923 flow [2024-06-21 20:31:32,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:31:32,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:31:32,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-21 20:31:32,320 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4557823129251701 [2024-06-21 20:31:32,320 INFO L175 Difference]: Start difference. First operand has 82 places, 87 transitions, 663 flow. Second operand 7 states and 134 transitions. [2024-06-21 20:31:32,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 106 transitions, 923 flow [2024-06-21 20:31:32,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 106 transitions, 824 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-21 20:31:32,334 INFO L231 Difference]: Finished difference. Result has 82 places, 87 transitions, 646 flow [2024-06-21 20:31:32,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=564, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=646, PETRI_PLACES=82, PETRI_TRANSITIONS=87} [2024-06-21 20:31:32,334 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 39 predicate places. [2024-06-21 20:31:32,334 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 87 transitions, 646 flow [2024-06-21 20:31:32,335 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) [2024-06-21 20:31:32,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:31:32,335 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:31:32,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 20:31:32,335 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:31:32,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:31:32,335 INFO L85 PathProgramCache]: Analyzing trace with hash 486257586, now seen corresponding path program 1 times [2024-06-21 20:31:32,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:31:32,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994549481] [2024-06-21 20:31:32,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:31:32,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:31:32,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:31:33,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:31:33,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:31:33,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994549481] [2024-06-21 20:31:33,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994549481] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:31:33,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:31:33,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:31:33,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005561912] [2024-06-21 20:31:33,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:31:33,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:31:33,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:31:33,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:31:33,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:31:33,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 42 [2024-06-21 20:31:33,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 87 transitions, 646 flow. Second operand has 7 states, 7 states have (on average 14.714285714285714) internal successors, (103), 7 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) [2024-06-21 20:31:33,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:31:33,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 42 [2024-06-21 20:31:33,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:31:33,534 INFO L124 PetriNetUnfolderBase]: 1219/2068 cut-off events. [2024-06-21 20:31:33,534 INFO L125 PetriNetUnfolderBase]: For 19541/19551 co-relation queries the response was YES. [2024-06-21 20:31:33,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8972 conditions, 2068 events. 1219/2068 cut-off events. For 19541/19551 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 11271 event pairs, 491 based on Foata normal form. 9/2073 useless extension candidates. Maximal degree in co-relation 8939. Up to 1792 conditions per place. [2024-06-21 20:31:33,546 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 67 selfloop transitions, 10 changer transitions 0/99 dead transitions. [2024-06-21 20:31:33,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 99 transitions, 851 flow [2024-06-21 20:31:33,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:31:33,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:31:33,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 118 transitions. [2024-06-21 20:31:33,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46825396825396826 [2024-06-21 20:31:33,547 INFO L175 Difference]: Start difference. First operand has 82 places, 87 transitions, 646 flow. Second operand 6 states and 118 transitions. [2024-06-21 20:31:33,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 99 transitions, 851 flow [2024-06-21 20:31:33,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 99 transitions, 750 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-21 20:31:33,559 INFO L231 Difference]: Finished difference. Result has 83 places, 92 transitions, 613 flow [2024-06-21 20:31:33,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=546, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=613, PETRI_PLACES=83, PETRI_TRANSITIONS=92} [2024-06-21 20:31:33,561 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 40 predicate places. [2024-06-21 20:31:33,561 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 92 transitions, 613 flow [2024-06-21 20:31:33,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.714285714285714) internal successors, (103), 7 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) [2024-06-21 20:31:33,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:31:33,561 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:31:33,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 20:31:33,561 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:31:33,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:31:33,562 INFO L85 PathProgramCache]: Analyzing trace with hash -270341277, now seen corresponding path program 1 times [2024-06-21 20:31:33,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:31:33,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490107973] [2024-06-21 20:31:33,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:31:33,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:31:33,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:31:34,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:31:34,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:31:34,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490107973] [2024-06-21 20:31:34,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490107973] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:31:34,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:31:34,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:31:34,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888609920] [2024-06-21 20:31:34,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:31:34,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:31:34,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:31:34,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:31:34,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:31:34,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:31:34,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 92 transitions, 613 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) [2024-06-21 20:31:34,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:31:34,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:31:34,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:31:35,011 INFO L124 PetriNetUnfolderBase]: 1653/2541 cut-off events. [2024-06-21 20:31:35,011 INFO L125 PetriNetUnfolderBase]: For 26392/26396 co-relation queries the response was YES. [2024-06-21 20:31:35,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11696 conditions, 2541 events. 1653/2541 cut-off events. For 26392/26396 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 12534 event pairs, 604 based on Foata normal form. 8/2547 useless extension candidates. Maximal degree in co-relation 11661. Up to 2357 conditions per place. [2024-06-21 20:31:35,027 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 89 selfloop transitions, 30 changer transitions 0/124 dead transitions. [2024-06-21 20:31:35,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 124 transitions, 977 flow [2024-06-21 20:31:35,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:31:35,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:31:35,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-21 20:31:35,028 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-21 20:31:35,028 INFO L175 Difference]: Start difference. First operand has 83 places, 92 transitions, 613 flow. Second operand 8 states and 154 transitions. [2024-06-21 20:31:35,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 124 transitions, 977 flow [2024-06-21 20:31:35,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 124 transitions, 949 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-21 20:31:35,042 INFO L231 Difference]: Finished difference. Result has 88 places, 95 transitions, 694 flow [2024-06-21 20:31:35,042 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=585, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=694, PETRI_PLACES=88, PETRI_TRANSITIONS=95} [2024-06-21 20:31:35,042 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 45 predicate places. [2024-06-21 20:31:35,042 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 95 transitions, 694 flow [2024-06-21 20:31:35,043 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) [2024-06-21 20:31:35,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:31:35,043 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:31:35,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 20:31:35,043 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:31:35,043 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:31:35,043 INFO L85 PathProgramCache]: Analyzing trace with hash -858434693, now seen corresponding path program 2 times [2024-06-21 20:31:35,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:31:35,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661167316] [2024-06-21 20:31:35,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:31:35,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:31:35,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:31:35,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:31:35,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:31:35,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661167316] [2024-06-21 20:31:35,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661167316] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:31:35,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:31:35,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:31:35,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567337418] [2024-06-21 20:31:35,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:31:35,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:31:35,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:31:35,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:31:35,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:31:35,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:31:35,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 95 transitions, 694 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) [2024-06-21 20:31:35,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:31:35,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:31:35,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:31:36,588 INFO L124 PetriNetUnfolderBase]: 1707/2630 cut-off events. [2024-06-21 20:31:36,588 INFO L125 PetriNetUnfolderBase]: For 31468/31472 co-relation queries the response was YES. [2024-06-21 20:31:36,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12796 conditions, 2630 events. 1707/2630 cut-off events. For 31468/31472 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 13067 event pairs, 546 based on Foata normal form. 4/2632 useless extension candidates. Maximal degree in co-relation 12760. Up to 2217 conditions per place. [2024-06-21 20:31:36,604 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 75 selfloop transitions, 56 changer transitions 0/136 dead transitions. [2024-06-21 20:31:36,604 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 136 transitions, 1280 flow [2024-06-21 20:31:36,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:31:36,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:31:36,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 165 transitions. [2024-06-21 20:31:36,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49107142857142855 [2024-06-21 20:31:36,605 INFO L175 Difference]: Start difference. First operand has 88 places, 95 transitions, 694 flow. Second operand 8 states and 165 transitions. [2024-06-21 20:31:36,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 136 transitions, 1280 flow [2024-06-21 20:31:36,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 136 transitions, 1197 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-21 20:31:36,626 INFO L231 Difference]: Finished difference. Result has 90 places, 104 transitions, 857 flow [2024-06-21 20:31:36,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=611, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=857, PETRI_PLACES=90, PETRI_TRANSITIONS=104} [2024-06-21 20:31:36,626 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 47 predicate places. [2024-06-21 20:31:36,627 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 104 transitions, 857 flow [2024-06-21 20:31:36,627 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) [2024-06-21 20:31:36,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:31:36,627 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:31:36,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 20:31:36,627 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:31:36,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:31:36,628 INFO L85 PathProgramCache]: Analyzing trace with hash -858440273, now seen corresponding path program 3 times [2024-06-21 20:31:36,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:31:36,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27256659] [2024-06-21 20:31:36,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:31:36,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:31:36,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:31:37,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:31:37,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:31:37,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27256659] [2024-06-21 20:31:37,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27256659] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:31:37,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:31:37,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:31:37,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405293466] [2024-06-21 20:31:37,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:31:37,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:31:37,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:31:37,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:31:37,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:31:37,542 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:31:37,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 104 transitions, 857 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) [2024-06-21 20:31:37,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:31:37,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:31:37,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:31:38,242 INFO L124 PetriNetUnfolderBase]: 1697/2616 cut-off events. [2024-06-21 20:31:38,243 INFO L125 PetriNetUnfolderBase]: For 35883/35887 co-relation queries the response was YES. [2024-06-21 20:31:38,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13248 conditions, 2616 events. 1697/2616 cut-off events. For 35883/35887 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 13010 event pairs, 544 based on Foata normal form. 4/2618 useless extension candidates. Maximal degree in co-relation 13211. Up to 2209 conditions per place. [2024-06-21 20:31:38,256 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 76 selfloop transitions, 54 changer transitions 0/135 dead transitions. [2024-06-21 20:31:38,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 135 transitions, 1265 flow [2024-06-21 20:31:38,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:31:38,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:31:38,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 165 transitions. [2024-06-21 20:31:38,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49107142857142855 [2024-06-21 20:31:38,258 INFO L175 Difference]: Start difference. First operand has 90 places, 104 transitions, 857 flow. Second operand 8 states and 165 transitions. [2024-06-21 20:31:38,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 135 transitions, 1265 flow [2024-06-21 20:31:38,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 135 transitions, 1180 flow, removed 29 selfloop flow, removed 3 redundant places. [2024-06-21 20:31:38,281 INFO L231 Difference]: Finished difference. Result has 95 places, 104 transitions, 888 flow [2024-06-21 20:31:38,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=772, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=888, PETRI_PLACES=95, PETRI_TRANSITIONS=104} [2024-06-21 20:31:38,281 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 52 predicate places. [2024-06-21 20:31:38,281 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 104 transitions, 888 flow [2024-06-21 20:31:38,281 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) [2024-06-21 20:31:38,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:31:38,282 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:31:38,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 20:31:38,282 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:31:38,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:31:38,282 INFO L85 PathProgramCache]: Analyzing trace with hash 891057105, now seen corresponding path program 4 times [2024-06-21 20:31:38,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:31:38,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382672503] [2024-06-21 20:31:38,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:31:38,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:31:38,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:31:39,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:31:39,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:31:39,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382672503] [2024-06-21 20:31:39,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382672503] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:31:39,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:31:39,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:31:39,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411364005] [2024-06-21 20:31:39,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:31:39,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:31:39,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:31:39,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:31:39,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:31:39,161 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:31:39,161 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 104 transitions, 888 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) [2024-06-21 20:31:39,161 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:31:39,161 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:31:39,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:31:39,874 INFO L124 PetriNetUnfolderBase]: 1719/2657 cut-off events. [2024-06-21 20:31:39,874 INFO L125 PetriNetUnfolderBase]: For 39877/39879 co-relation queries the response was YES. [2024-06-21 20:31:39,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13763 conditions, 2657 events. 1719/2657 cut-off events. For 39877/39879 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 13311 event pairs, 554 based on Foata normal form. 4/2656 useless extension candidates. Maximal degree in co-relation 13724. Up to 2228 conditions per place. [2024-06-21 20:31:39,888 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 69 selfloop transitions, 60 changer transitions 0/134 dead transitions. [2024-06-21 20:31:39,889 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 134 transitions, 1340 flow [2024-06-21 20:31:39,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:31:39,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:31:39,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-21 20:31:39,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47023809523809523 [2024-06-21 20:31:39,890 INFO L175 Difference]: Start difference. First operand has 95 places, 104 transitions, 888 flow. Second operand 8 states and 158 transitions. [2024-06-21 20:31:39,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 134 transitions, 1340 flow [2024-06-21 20:31:39,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 134 transitions, 1207 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-21 20:31:39,909 INFO L231 Difference]: Finished difference. Result has 96 places, 107 transitions, 935 flow [2024-06-21 20:31:39,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=761, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=935, PETRI_PLACES=96, PETRI_TRANSITIONS=107} [2024-06-21 20:31:39,910 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 53 predicate places. [2024-06-21 20:31:39,910 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 107 transitions, 935 flow [2024-06-21 20:31:39,910 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) [2024-06-21 20:31:39,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:31:39,910 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:31:39,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 20:31:39,911 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:31:39,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:31:39,911 INFO L85 PathProgramCache]: Analyzing trace with hash 929493197, now seen corresponding path program 5 times [2024-06-21 20:31:39,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:31:39,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101060491] [2024-06-21 20:31:39,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:31:39,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:31:39,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:31:40,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:31:40,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:31:40,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101060491] [2024-06-21 20:31:40,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101060491] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:31:40,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:31:40,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:31:40,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178602400] [2024-06-21 20:31:40,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:31:40,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:31:40,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:31:40,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:31:40,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:31:40,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:31:40,862 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 107 transitions, 935 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) [2024-06-21 20:31:40,862 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:31:40,862 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:31:40,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:31:41,572 INFO L124 PetriNetUnfolderBase]: 1741/2695 cut-off events. [2024-06-21 20:31:41,573 INFO L125 PetriNetUnfolderBase]: For 43913/43918 co-relation queries the response was YES. [2024-06-21 20:31:41,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14181 conditions, 2695 events. 1741/2695 cut-off events. For 43913/43918 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 13529 event pairs, 549 based on Foata normal form. 4/2693 useless extension candidates. Maximal degree in co-relation 14141. Up to 2247 conditions per place. [2024-06-21 20:31:41,589 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 74 selfloop transitions, 59 changer transitions 0/138 dead transitions. [2024-06-21 20:31:41,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 138 transitions, 1401 flow [2024-06-21 20:31:41,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:31:41,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:31:41,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-21 20:31:41,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4791666666666667 [2024-06-21 20:31:41,591 INFO L175 Difference]: Start difference. First operand has 96 places, 107 transitions, 935 flow. Second operand 8 states and 161 transitions. [2024-06-21 20:31:41,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 138 transitions, 1401 flow [2024-06-21 20:31:41,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 138 transitions, 1262 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-21 20:31:41,618 INFO L231 Difference]: Finished difference. Result has 99 places, 110 transitions, 974 flow [2024-06-21 20:31:41,618 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=805, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=974, PETRI_PLACES=99, PETRI_TRANSITIONS=110} [2024-06-21 20:31:41,619 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 56 predicate places. [2024-06-21 20:31:41,619 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 110 transitions, 974 flow [2024-06-21 20:31:41,619 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) [2024-06-21 20:31:41,619 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:31:41,619 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:31:41,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 20:31:41,619 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:31:41,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:31:41,620 INFO L85 PathProgramCache]: Analyzing trace with hash 929487617, now seen corresponding path program 6 times [2024-06-21 20:31:41,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:31:41,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809053030] [2024-06-21 20:31:41,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:31:41,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:31:41,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:31:42,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:31:42,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:31:42,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809053030] [2024-06-21 20:31:42,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809053030] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:31:42,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:31:42,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:31:42,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082267915] [2024-06-21 20:31:42,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:31:42,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:31:42,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:31:42,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:31:42,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:31:42,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:31:42,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 110 transitions, 974 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) [2024-06-21 20:31:42,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:31:42,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:31:42,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:31:43,222 INFO L124 PetriNetUnfolderBase]: 1731/2681 cut-off events. [2024-06-21 20:31:43,222 INFO L125 PetriNetUnfolderBase]: For 46928/46933 co-relation queries the response was YES. [2024-06-21 20:31:43,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14150 conditions, 2681 events. 1731/2681 cut-off events. For 46928/46933 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 13400 event pairs, 547 based on Foata normal form. 4/2679 useless extension candidates. Maximal degree in co-relation 14109. Up to 2239 conditions per place. [2024-06-21 20:31:43,236 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 71 selfloop transitions, 60 changer transitions 0/136 dead transitions. [2024-06-21 20:31:43,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 136 transitions, 1310 flow [2024-06-21 20:31:43,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:31:43,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:31:43,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-21 20:31:43,237 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47023809523809523 [2024-06-21 20:31:43,237 INFO L175 Difference]: Start difference. First operand has 99 places, 110 transitions, 974 flow. Second operand 8 states and 158 transitions. [2024-06-21 20:31:43,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 136 transitions, 1310 flow [2024-06-21 20:31:43,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 136 transitions, 1090 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-21 20:31:43,263 INFO L231 Difference]: Finished difference. Result has 100 places, 110 transitions, 882 flow [2024-06-21 20:31:43,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=754, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=882, PETRI_PLACES=100, PETRI_TRANSITIONS=110} [2024-06-21 20:31:43,264 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 57 predicate places. [2024-06-21 20:31:43,264 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 110 transitions, 882 flow [2024-06-21 20:31:43,264 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) [2024-06-21 20:31:43,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:31:43,264 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:31:43,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 20:31:43,265 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)] === [2024-06-21 20:31:43,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:31:43,265 INFO L85 PathProgramCache]: Analyzing trace with hash 937121894, now seen corresponding path program 1 times [2024-06-21 20:31:43,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:31:43,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379280417] [2024-06-21 20:31:43,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:31:43,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:31:43,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:31:44,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:31:44,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:31:44,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379280417] [2024-06-21 20:31:44,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379280417] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:31:44,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:31:44,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:31:44,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74791438] [2024-06-21 20:31:44,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:31:44,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:31:44,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:31:44,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:31:44,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:31:44,412 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 20:31:44,412 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 110 transitions, 882 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:31:44,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:31:44,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 20:31:44,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:31:44,941 INFO L124 PetriNetUnfolderBase]: 1516/2447 cut-off events. [2024-06-21 20:31:44,941 INFO L125 PetriNetUnfolderBase]: For 41601/41603 co-relation queries the response was YES. [2024-06-21 20:31:44,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12571 conditions, 2447 events. 1516/2447 cut-off events. For 41601/41603 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 12684 event pairs, 480 based on Foata normal form. 4/2449 useless extension candidates. Maximal degree in co-relation 12529. Up to 2214 conditions per place. [2024-06-21 20:31:44,956 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 115 selfloop transitions, 17 changer transitions 0/138 dead transitions. [2024-06-21 20:31:44,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 138 transitions, 1266 flow [2024-06-21 20:31:44,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:31:44,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:31:44,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-21 20:31:44,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-21 20:31:44,958 INFO L175 Difference]: Start difference. First operand has 100 places, 110 transitions, 882 flow. Second operand 8 states and 154 transitions. [2024-06-21 20:31:44,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 138 transitions, 1266 flow [2024-06-21 20:31:45,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 138 transitions, 1134 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-21 20:31:45,039 INFO L231 Difference]: Finished difference. Result has 102 places, 115 transitions, 853 flow [2024-06-21 20:31:45,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=754, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=853, PETRI_PLACES=102, PETRI_TRANSITIONS=115} [2024-06-21 20:31:45,040 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 59 predicate places. [2024-06-21 20:31:45,040 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 115 transitions, 853 flow [2024-06-21 20:31:45,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:31:45,040 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:31:45,041 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:31:45,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 20:31:45,041 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:31:45,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:31:45,041 INFO L85 PathProgramCache]: Analyzing trace with hash -2062090089, now seen corresponding path program 1 times [2024-06-21 20:31:45,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:31:45,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096883967] [2024-06-21 20:31:45,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:31:45,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:31:45,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:31:46,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:31:46,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:31:46,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096883967] [2024-06-21 20:31:46,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096883967] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:31:46,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:31:46,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:31:46,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589758308] [2024-06-21 20:31:46,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:31:46,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:31:46,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:31:46,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:31:46,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:31:46,146 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 42 [2024-06-21 20:31:46,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 115 transitions, 853 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 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) [2024-06-21 20:31:46,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:31:46,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 42 [2024-06-21 20:31:46,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:31:46,504 INFO L124 PetriNetUnfolderBase]: 1277/2171 cut-off events. [2024-06-21 20:31:46,504 INFO L125 PetriNetUnfolderBase]: For 43690/43702 co-relation queries the response was YES. [2024-06-21 20:31:46,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11578 conditions, 2171 events. 1277/2171 cut-off events. For 43690/43702 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 11877 event pairs, 446 based on Foata normal form. 11/2159 useless extension candidates. Maximal degree in co-relation 11534. Up to 1873 conditions per place. [2024-06-21 20:31:46,519 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 92 selfloop transitions, 12 changer transitions 0/126 dead transitions. [2024-06-21 20:31:46,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 126 transitions, 1107 flow [2024-06-21 20:31:46,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:31:46,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:31:46,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 121 transitions. [2024-06-21 20:31:46,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4801587301587302 [2024-06-21 20:31:46,520 INFO L175 Difference]: Start difference. First operand has 102 places, 115 transitions, 853 flow. Second operand 6 states and 121 transitions. [2024-06-21 20:31:46,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 126 transitions, 1107 flow [2024-06-21 20:31:46,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 126 transitions, 1048 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-21 20:31:46,545 INFO L231 Difference]: Finished difference. Result has 103 places, 118 transitions, 854 flow [2024-06-21 20:31:46,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=794, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=854, PETRI_PLACES=103, PETRI_TRANSITIONS=118} [2024-06-21 20:31:46,546 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 60 predicate places. [2024-06-21 20:31:46,546 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 118 transitions, 854 flow [2024-06-21 20:31:46,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 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) [2024-06-21 20:31:46,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:31:46,546 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:31:46,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 20:31:46,547 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:31:46,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:31:46,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1502829334, now seen corresponding path program 1 times [2024-06-21 20:31:46,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:31:46,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127080026] [2024-06-21 20:31:46,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:31:46,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:31:46,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:31:47,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:31:47,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:31:47,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127080026] [2024-06-21 20:31:47,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127080026] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:31:47,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:31:47,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:31:47,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087083443] [2024-06-21 20:31:47,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:31:47,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:31:47,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:31:47,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:31:47,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:31:47,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:31:47,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 118 transitions, 854 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) [2024-06-21 20:31:47,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:31:47,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:31:47,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:31:48,182 INFO L124 PetriNetUnfolderBase]: 1759/2729 cut-off events. [2024-06-21 20:31:48,183 INFO L125 PetriNetUnfolderBase]: For 57979/57983 co-relation queries the response was YES. [2024-06-21 20:31:48,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15090 conditions, 2729 events. 1759/2729 cut-off events. For 57979/57983 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 13699 event pairs, 392 based on Foata normal form. 8/2735 useless extension candidates. Maximal degree in co-relation 15045. Up to 2446 conditions per place. [2024-06-21 20:31:48,199 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 120 selfloop transitions, 33 changer transitions 0/158 dead transitions. [2024-06-21 20:31:48,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 158 transitions, 1426 flow [2024-06-21 20:31:48,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:31:48,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:31:48,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-21 20:31:48,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4576719576719577 [2024-06-21 20:31:48,201 INFO L175 Difference]: Start difference. First operand has 103 places, 118 transitions, 854 flow. Second operand 9 states and 173 transitions. [2024-06-21 20:31:48,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 158 transitions, 1426 flow [2024-06-21 20:31:48,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 158 transitions, 1388 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-21 20:31:48,228 INFO L231 Difference]: Finished difference. Result has 108 places, 122 transitions, 965 flow [2024-06-21 20:31:48,228 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=816, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=965, PETRI_PLACES=108, PETRI_TRANSITIONS=122} [2024-06-21 20:31:48,229 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 65 predicate places. [2024-06-21 20:31:48,229 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 122 transitions, 965 flow [2024-06-21 20:31:48,229 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) [2024-06-21 20:31:48,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:31:48,229 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:31:48,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 20:31:48,229 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)] === [2024-06-21 20:31:48,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:31:48,230 INFO L85 PathProgramCache]: Analyzing trace with hash 320174078, now seen corresponding path program 2 times [2024-06-21 20:31:48,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:31:48,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085647037] [2024-06-21 20:31:48,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:31:48,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:31:48,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:31:49,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:31:49,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:31:49,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085647037] [2024-06-21 20:31:49,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085647037] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:31:49,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:31:49,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:31:49,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917395715] [2024-06-21 20:31:49,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:31:49,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:31:49,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:31:49,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:31:49,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:31:49,138 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:31:49,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 122 transitions, 965 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) [2024-06-21 20:31:49,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:31:49,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:31:49,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:31:49,730 INFO L124 PetriNetUnfolderBase]: 1751/2717 cut-off events. [2024-06-21 20:31:49,730 INFO L125 PetriNetUnfolderBase]: For 62485/62489 co-relation queries the response was YES. [2024-06-21 20:31:49,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15393 conditions, 2717 events. 1751/2717 cut-off events. For 62485/62489 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 13670 event pairs, 531 based on Foata normal form. 8/2723 useless extension candidates. Maximal degree in co-relation 15347. Up to 2505 conditions per place. [2024-06-21 20:31:49,748 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 117 selfloop transitions, 29 changer transitions 0/151 dead transitions. [2024-06-21 20:31:49,748 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 151 transitions, 1349 flow [2024-06-21 20:31:49,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:31:49,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:31:49,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-21 20:31:49,750 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45535714285714285 [2024-06-21 20:31:49,750 INFO L175 Difference]: Start difference. First operand has 108 places, 122 transitions, 965 flow. Second operand 8 states and 153 transitions. [2024-06-21 20:31:49,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 151 transitions, 1349 flow [2024-06-21 20:31:49,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 151 transitions, 1252 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-21 20:31:49,791 INFO L231 Difference]: Finished difference. Result has 111 places, 122 transitions, 934 flow [2024-06-21 20:31:49,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=868, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=934, PETRI_PLACES=111, PETRI_TRANSITIONS=122} [2024-06-21 20:31:49,792 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 68 predicate places. [2024-06-21 20:31:49,792 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 122 transitions, 934 flow [2024-06-21 20:31:49,792 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) [2024-06-21 20:31:49,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:31:49,792 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:31:49,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 20:31:49,792 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)] === [2024-06-21 20:31:49,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:31:49,793 INFO L85 PathProgramCache]: Analyzing trace with hash 1160920710, now seen corresponding path program 3 times [2024-06-21 20:31:49,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:31:49,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776761959] [2024-06-21 20:31:49,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:31:49,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:31:49,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:31:50,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:31:50,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:31:50,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776761959] [2024-06-21 20:31:50,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776761959] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:31:50,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:31:50,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:31:50,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364230906] [2024-06-21 20:31:50,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:31:50,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:31:50,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:31:50,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:31:50,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:31:50,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:31:50,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 122 transitions, 934 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) [2024-06-21 20:31:50,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:31:50,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:31:50,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:31:51,432 INFO L124 PetriNetUnfolderBase]: 1768/2743 cut-off events. [2024-06-21 20:31:51,433 INFO L125 PetriNetUnfolderBase]: For 67820/67824 co-relation queries the response was YES. [2024-06-21 20:31:51,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15688 conditions, 2743 events. 1768/2743 cut-off events. For 67820/67824 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 13833 event pairs, 539 based on Foata normal form. 6/2747 useless extension candidates. Maximal degree in co-relation 15640. Up to 2487 conditions per place. [2024-06-21 20:31:51,450 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 104 selfloop transitions, 40 changer transitions 0/149 dead transitions. [2024-06-21 20:31:51,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 149 transitions, 1336 flow [2024-06-21 20:31:51,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:31:51,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:31:51,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-21 20:31:51,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-21 20:31:51,452 INFO L175 Difference]: Start difference. First operand has 111 places, 122 transitions, 934 flow. Second operand 8 states and 154 transitions. [2024-06-21 20:31:51,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 149 transitions, 1336 flow [2024-06-21 20:31:51,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 149 transitions, 1271 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-21 20:31:51,490 INFO L231 Difference]: Finished difference. Result has 112 places, 124 transitions, 1000 flow [2024-06-21 20:31:51,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=869, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1000, PETRI_PLACES=112, PETRI_TRANSITIONS=124} [2024-06-21 20:31:51,491 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 69 predicate places. [2024-06-21 20:31:51,491 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 124 transitions, 1000 flow [2024-06-21 20:31:51,491 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) [2024-06-21 20:31:51,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:31:51,491 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:31:51,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 20:31:51,491 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:31:51,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:31:51,492 INFO L85 PathProgramCache]: Analyzing trace with hash 582075187, now seen corresponding path program 1 times [2024-06-21 20:31:51,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:31:51,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047797362] [2024-06-21 20:31:51,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:31:51,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:31:51,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:31:52,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:31:52,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:31:52,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047797362] [2024-06-21 20:31:52,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047797362] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:31:52,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:31:52,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:31:52,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808367980] [2024-06-21 20:31:52,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:31:52,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:31:52,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:31:52,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:31:52,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:31:52,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 20:31:52,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 124 transitions, 1000 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:31:52,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:31:52,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 20:31:52,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:31:52,715 INFO L124 PetriNetUnfolderBase]: 1494/2437 cut-off events. [2024-06-21 20:31:52,715 INFO L125 PetriNetUnfolderBase]: For 71286/71304 co-relation queries the response was YES. [2024-06-21 20:31:52,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14512 conditions, 2437 events. 1494/2437 cut-off events. For 71286/71304 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 13064 event pairs, 509 based on Foata normal form. 12/2425 useless extension candidates. Maximal degree in co-relation 14463. Up to 2155 conditions per place. [2024-06-21 20:31:52,732 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 94 selfloop transitions, 22 changer transitions 0/140 dead transitions. [2024-06-21 20:31:52,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 140 transitions, 1298 flow [2024-06-21 20:31:52,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:31:52,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:31:52,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 122 transitions. [2024-06-21 20:31:52,733 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48412698412698413 [2024-06-21 20:31:52,733 INFO L175 Difference]: Start difference. First operand has 112 places, 124 transitions, 1000 flow. Second operand 6 states and 122 transitions. [2024-06-21 20:31:52,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 140 transitions, 1298 flow [2024-06-21 20:31:52,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 140 transitions, 1185 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-21 20:31:52,772 INFO L231 Difference]: Finished difference. Result has 112 places, 127 transitions, 975 flow [2024-06-21 20:31:52,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=887, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=975, PETRI_PLACES=112, PETRI_TRANSITIONS=127} [2024-06-21 20:31:52,773 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 69 predicate places. [2024-06-21 20:31:52,773 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 127 transitions, 975 flow [2024-06-21 20:31:52,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:31:52,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:31:52,774 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:31:52,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 20:31:52,774 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)] === [2024-06-21 20:31:52,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:31:52,774 INFO L85 PathProgramCache]: Analyzing trace with hash -676209000, now seen corresponding path program 4 times [2024-06-21 20:31:52,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:31:52,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205450884] [2024-06-21 20:31:52,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:31:52,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:31:52,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:31:53,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:31:53,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:31:53,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205450884] [2024-06-21 20:31:53,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205450884] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:31:53,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:31:53,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:31:53,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146518607] [2024-06-21 20:31:53,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:31:53,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:31:53,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:31:53,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:31:53,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:31:53,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:31:53,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 127 transitions, 975 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) [2024-06-21 20:31:53,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:31:53,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:31:53,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:31:54,194 INFO L124 PetriNetUnfolderBase]: 1770/2746 cut-off events. [2024-06-21 20:31:54,195 INFO L125 PetriNetUnfolderBase]: For 76943/76945 co-relation queries the response was YES. [2024-06-21 20:31:54,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16276 conditions, 2746 events. 1770/2746 cut-off events. For 76943/76945 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 13766 event pairs, 542 based on Foata normal form. 4/2745 useless extension candidates. Maximal degree in co-relation 16226. Up to 2489 conditions per place. [2024-06-21 20:31:54,211 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 108 selfloop transitions, 39 changer transitions 0/152 dead transitions. [2024-06-21 20:31:54,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 152 transitions, 1381 flow [2024-06-21 20:31:54,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:31:54,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:31:54,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-21 20:31:54,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494047619047619 [2024-06-21 20:31:54,213 INFO L175 Difference]: Start difference. First operand has 112 places, 127 transitions, 975 flow. Second operand 8 states and 151 transitions. [2024-06-21 20:31:54,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 152 transitions, 1381 flow [2024-06-21 20:31:54,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 152 transitions, 1323 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-21 20:31:54,258 INFO L231 Difference]: Finished difference. Result has 116 places, 129 transitions, 1050 flow [2024-06-21 20:31:54,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=917, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1050, PETRI_PLACES=116, PETRI_TRANSITIONS=129} [2024-06-21 20:31:54,259 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 73 predicate places. [2024-06-21 20:31:54,259 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 129 transitions, 1050 flow [2024-06-21 20:31:54,259 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) [2024-06-21 20:31:54,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:31:54,259 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:31:54,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 20:31:54,259 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:31:54,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:31:54,260 INFO L85 PathProgramCache]: Analyzing trace with hash 499702991, now seen corresponding path program 2 times [2024-06-21 20:31:54,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:31:54,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115865224] [2024-06-21 20:31:54,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:31:54,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:31:54,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:31:55,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:31:55,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:31:55,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115865224] [2024-06-21 20:31:55,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115865224] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:31:55,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:31:55,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:31:55,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242524959] [2024-06-21 20:31:55,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:31:55,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:31:55,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:31:55,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:31:55,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:31:55,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 20:31:55,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 129 transitions, 1050 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:31:55,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:31:55,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 20:31:55,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:31:55,440 INFO L124 PetriNetUnfolderBase]: 1483/2413 cut-off events. [2024-06-21 20:31:55,440 INFO L125 PetriNetUnfolderBase]: For 79321/79331 co-relation queries the response was YES. [2024-06-21 20:31:55,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14922 conditions, 2413 events. 1483/2413 cut-off events. For 79321/79331 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 12891 event pairs, 512 based on Foata normal form. 9/2388 useless extension candidates. Maximal degree in co-relation 14871. Up to 2137 conditions per place. [2024-06-21 20:31:55,458 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 89 selfloop transitions, 26 changer transitions 0/140 dead transitions. [2024-06-21 20:31:55,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 140 transitions, 1336 flow [2024-06-21 20:31:55,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:31:55,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:31:55,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 118 transitions. [2024-06-21 20:31:55,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46825396825396826 [2024-06-21 20:31:55,459 INFO L175 Difference]: Start difference. First operand has 116 places, 129 transitions, 1050 flow. Second operand 6 states and 118 transitions. [2024-06-21 20:31:55,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 140 transitions, 1336 flow [2024-06-21 20:31:55,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 140 transitions, 1221 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-21 20:31:55,498 INFO L231 Difference]: Finished difference. Result has 116 places, 132 transitions, 1033 flow [2024-06-21 20:31:55,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=935, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1033, PETRI_PLACES=116, PETRI_TRANSITIONS=132} [2024-06-21 20:31:55,500 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 73 predicate places. [2024-06-21 20:31:55,500 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 132 transitions, 1033 flow [2024-06-21 20:31:55,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:31:55,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:31:55,501 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:31:55,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 20:31:55,501 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:31:55,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:31:55,501 INFO L85 PathProgramCache]: Analyzing trace with hash -864533167, now seen corresponding path program 1 times [2024-06-21 20:31:55,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:31:55,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146045228] [2024-06-21 20:31:55,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:31:55,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:31:55,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:31:56,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:31:56,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:31:56,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146045228] [2024-06-21 20:31:56,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146045228] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:31:56,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:31:56,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:31:56,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984423227] [2024-06-21 20:31:56,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:31:56,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:31:56,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:31:56,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:31:56,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:31:56,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 20:31:56,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 132 transitions, 1033 flow. Second operand has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:31:56,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:31:56,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 20:31:56,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:31:56,812 INFO L124 PetriNetUnfolderBase]: 1565/2525 cut-off events. [2024-06-21 20:31:56,812 INFO L125 PetriNetUnfolderBase]: For 72708/72710 co-relation queries the response was YES. [2024-06-21 20:31:56,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15071 conditions, 2525 events. 1565/2525 cut-off events. For 72708/72710 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 13065 event pairs, 453 based on Foata normal form. 1/2524 useless extension candidates. Maximal degree in co-relation 15019. Up to 2325 conditions per place. [2024-06-21 20:31:56,828 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 128 selfloop transitions, 12 changer transitions 0/146 dead transitions. [2024-06-21 20:31:56,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 146 transitions, 1383 flow [2024-06-21 20:31:56,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:31:56,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:31:56,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 114 transitions. [2024-06-21 20:31:56,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-21 20:31:56,830 INFO L175 Difference]: Start difference. First operand has 116 places, 132 transitions, 1033 flow. Second operand 6 states and 114 transitions. [2024-06-21 20:31:56,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 146 transitions, 1383 flow [2024-06-21 20:31:56,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 146 transitions, 1307 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-21 20:31:56,869 INFO L231 Difference]: Finished difference. Result has 118 places, 135 transitions, 1031 flow [2024-06-21 20:31:56,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=957, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1031, PETRI_PLACES=118, PETRI_TRANSITIONS=135} [2024-06-21 20:31:56,869 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 75 predicate places. [2024-06-21 20:31:56,870 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 135 transitions, 1031 flow [2024-06-21 20:31:56,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:31:56,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:31:56,870 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:31:56,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 20:31:56,870 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:31:56,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:31:56,871 INFO L85 PathProgramCache]: Analyzing trace with hash 499708943, now seen corresponding path program 2 times [2024-06-21 20:31:56,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:31:56,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908392667] [2024-06-21 20:31:56,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:31:56,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:31:56,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:31:57,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:31:57,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:31:57,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908392667] [2024-06-21 20:31:57,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908392667] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:31:57,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:31:57,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:31:57,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742367225] [2024-06-21 20:31:57,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:31:57,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:31:57,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:31:57,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:31:57,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:31:57,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 20:31:57,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 135 transitions, 1031 flow. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:31:57,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:31:57,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 20:31:57,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:31:57,987 INFO L124 PetriNetUnfolderBase]: 1562/2522 cut-off events. [2024-06-21 20:31:57,987 INFO L125 PetriNetUnfolderBase]: For 76086/76090 co-relation queries the response was YES. [2024-06-21 20:31:57,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15324 conditions, 2522 events. 1562/2522 cut-off events. For 76086/76090 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 13121 event pairs, 457 based on Foata normal form. 3/2523 useless extension candidates. Maximal degree in co-relation 15271. Up to 2315 conditions per place. [2024-06-21 20:31:58,005 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 123 selfloop transitions, 17 changer transitions 0/146 dead transitions. [2024-06-21 20:31:58,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 146 transitions, 1377 flow [2024-06-21 20:31:58,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:31:58,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:31:58,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 113 transitions. [2024-06-21 20:31:58,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44841269841269843 [2024-06-21 20:31:58,007 INFO L175 Difference]: Start difference. First operand has 118 places, 135 transitions, 1031 flow. Second operand 6 states and 113 transitions. [2024-06-21 20:31:58,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 146 transitions, 1377 flow [2024-06-21 20:31:58,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 146 transitions, 1325 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-21 20:31:58,056 INFO L231 Difference]: Finished difference. Result has 120 places, 138 transitions, 1069 flow [2024-06-21 20:31:58,056 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=979, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1069, PETRI_PLACES=120, PETRI_TRANSITIONS=138} [2024-06-21 20:31:58,056 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 77 predicate places. [2024-06-21 20:31:58,056 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 138 transitions, 1069 flow [2024-06-21 20:31:58,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:31:58,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:31:58,057 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:31:58,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 20:31:58,057 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:31:58,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:31:58,058 INFO L85 PathProgramCache]: Analyzing trace with hash 2106366724, now seen corresponding path program 1 times [2024-06-21 20:31:58,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:31:58,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567108505] [2024-06-21 20:31:58,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:31:58,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:31:58,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:31:58,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:31:58,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:31:58,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567108505] [2024-06-21 20:31:58,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567108505] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:31:58,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:31:58,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:31:58,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388457494] [2024-06-21 20:31:58,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:31:58,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:31:58,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:31:58,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:31:58,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:31:58,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:31:58,925 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 138 transitions, 1069 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) [2024-06-21 20:31:58,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:31:58,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:31:58,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:31:59,514 INFO L124 PetriNetUnfolderBase]: 1935/3043 cut-off events. [2024-06-21 20:31:59,514 INFO L125 PetriNetUnfolderBase]: For 116366/116370 co-relation queries the response was YES. [2024-06-21 20:31:59,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19741 conditions, 3043 events. 1935/3043 cut-off events. For 116366/116370 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 16041 event pairs, 445 based on Foata normal form. 20/3061 useless extension candidates. Maximal degree in co-relation 19687. Up to 2452 conditions per place. [2024-06-21 20:31:59,536 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 149 selfloop transitions, 35 changer transitions 0/189 dead transitions. [2024-06-21 20:31:59,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 189 transitions, 1785 flow [2024-06-21 20:31:59,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:31:59,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:31:59,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 198 transitions. [2024-06-21 20:31:59,537 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4714285714285714 [2024-06-21 20:31:59,537 INFO L175 Difference]: Start difference. First operand has 120 places, 138 transitions, 1069 flow. Second operand 10 states and 198 transitions. [2024-06-21 20:31:59,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 189 transitions, 1785 flow [2024-06-21 20:31:59,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 189 transitions, 1717 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-21 20:31:59,599 INFO L231 Difference]: Finished difference. Result has 126 places, 140 transitions, 1143 flow [2024-06-21 20:31:59,599 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1001, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1143, PETRI_PLACES=126, PETRI_TRANSITIONS=140} [2024-06-21 20:31:59,600 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 83 predicate places. [2024-06-21 20:31:59,600 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 140 transitions, 1143 flow [2024-06-21 20:31:59,600 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) [2024-06-21 20:31:59,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:31:59,600 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:31:59,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 20:31:59,601 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:31:59,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:31:59,601 INFO L85 PathProgramCache]: Analyzing trace with hash 2108240674, now seen corresponding path program 2 times [2024-06-21 20:31:59,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:31:59,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209913099] [2024-06-21 20:31:59,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:31:59,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:31:59,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:32:00,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:32:00,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:32:00,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209913099] [2024-06-21 20:32:00,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209913099] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:32:00,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:32:00,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:32:00,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072741463] [2024-06-21 20:32:00,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:32:00,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:32:00,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:32:00,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:32:00,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:32:00,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:32:00,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 140 transitions, 1143 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) [2024-06-21 20:32:00,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:32:00,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:32:00,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:32:01,044 INFO L124 PetriNetUnfolderBase]: 1993/3142 cut-off events. [2024-06-21 20:32:01,044 INFO L125 PetriNetUnfolderBase]: For 124100/124104 co-relation queries the response was YES. [2024-06-21 20:32:01,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20658 conditions, 3142 events. 1993/3142 cut-off events. For 124100/124104 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 16607 event pairs, 576 based on Foata normal form. 20/3160 useless extension candidates. Maximal degree in co-relation 20603. Up to 2625 conditions per place. [2024-06-21 20:32:01,065 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 148 selfloop transitions, 32 changer transitions 0/185 dead transitions. [2024-06-21 20:32:01,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 185 transitions, 1811 flow [2024-06-21 20:32:01,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:32:01,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:32:01,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 180 transitions. [2024-06-21 20:32:01,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-21 20:32:01,067 INFO L175 Difference]: Start difference. First operand has 126 places, 140 transitions, 1143 flow. Second operand 9 states and 180 transitions. [2024-06-21 20:32:01,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 185 transitions, 1811 flow [2024-06-21 20:32:01,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 185 transitions, 1746 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-21 20:32:01,124 INFO L231 Difference]: Finished difference. Result has 129 places, 141 transitions, 1182 flow [2024-06-21 20:32:01,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1080, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1182, PETRI_PLACES=129, PETRI_TRANSITIONS=141} [2024-06-21 20:32:01,125 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 86 predicate places. [2024-06-21 20:32:01,125 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 141 transitions, 1182 flow [2024-06-21 20:32:01,125 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) [2024-06-21 20:32:01,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:32:01,125 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:32:01,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 20:32:01,125 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)] === [2024-06-21 20:32:01,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:32:01,126 INFO L85 PathProgramCache]: Analyzing trace with hash -653120140, now seen corresponding path program 3 times [2024-06-21 20:32:01,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:32:01,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182948701] [2024-06-21 20:32:01,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:32:01,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:32:01,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:32:01,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:32:01,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:32:01,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182948701] [2024-06-21 20:32:01,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182948701] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:32:01,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:32:01,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:32:01,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332287875] [2024-06-21 20:32:01,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:32:01,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:32:01,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:32:01,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:32:01,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:32:02,049 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:32:02,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 141 transitions, 1182 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) [2024-06-21 20:32:02,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:32:02,050 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:32:02,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:32:02,769 INFO L124 PetriNetUnfolderBase]: 1957/3086 cut-off events. [2024-06-21 20:32:02,769 INFO L125 PetriNetUnfolderBase]: For 123998/124002 co-relation queries the response was YES. [2024-06-21 20:32:02,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19902 conditions, 3086 events. 1957/3086 cut-off events. For 123998/124002 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 16259 event pairs, 578 based on Foata normal form. 24/3108 useless extension candidates. Maximal degree in co-relation 19845. Up to 2730 conditions per place. [2024-06-21 20:32:02,795 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 143 selfloop transitions, 31 changer transitions 0/179 dead transitions. [2024-06-21 20:32:02,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 179 transitions, 1670 flow [2024-06-21 20:32:02,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:32:02,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:32:02,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-21 20:32:02,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603174603174603 [2024-06-21 20:32:02,796 INFO L175 Difference]: Start difference. First operand has 129 places, 141 transitions, 1182 flow. Second operand 9 states and 174 transitions. [2024-06-21 20:32:02,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 179 transitions, 1670 flow [2024-06-21 20:32:02,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 179 transitions, 1571 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-21 20:32:02,857 INFO L231 Difference]: Finished difference. Result has 131 places, 141 transitions, 1152 flow [2024-06-21 20:32:02,858 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1083, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1152, PETRI_PLACES=131, PETRI_TRANSITIONS=141} [2024-06-21 20:32:02,858 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 88 predicate places. [2024-06-21 20:32:02,858 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 141 transitions, 1152 flow [2024-06-21 20:32:02,858 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) [2024-06-21 20:32:02,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:32:02,858 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:32:02,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 20:32:02,859 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)] === [2024-06-21 20:32:02,859 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:32:02,859 INFO L85 PathProgramCache]: Analyzing trace with hash -321976646, now seen corresponding path program 4 times [2024-06-21 20:32:02,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:32:02,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368313768] [2024-06-21 20:32:02,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:32:02,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:32:02,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:32:03,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:32:03,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:32:03,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368313768] [2024-06-21 20:32:03,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368313768] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:32:03,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:32:03,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:32:03,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228894926] [2024-06-21 20:32:03,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:32:03,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:32:03,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:32:03,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:32:03,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:32:03,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:32:03,814 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 141 transitions, 1152 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) [2024-06-21 20:32:03,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:32:03,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:32:03,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:32:04,630 INFO L124 PetriNetUnfolderBase]: 2032/3208 cut-off events. [2024-06-21 20:32:04,630 INFO L125 PetriNetUnfolderBase]: For 129781/129785 co-relation queries the response was YES. [2024-06-21 20:32:04,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20528 conditions, 3208 events. 2032/3208 cut-off events. For 129781/129785 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 17182 event pairs, 546 based on Foata normal form. 20/3226 useless extension candidates. Maximal degree in co-relation 20470. Up to 2623 conditions per place. [2024-06-21 20:32:04,656 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 108 selfloop transitions, 65 changer transitions 0/178 dead transitions. [2024-06-21 20:32:04,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 178 transitions, 1662 flow [2024-06-21 20:32:04,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:32:04,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:32:04,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 181 transitions. [2024-06-21 20:32:04,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47883597883597884 [2024-06-21 20:32:04,658 INFO L175 Difference]: Start difference. First operand has 131 places, 141 transitions, 1152 flow. Second operand 9 states and 181 transitions. [2024-06-21 20:32:04,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 178 transitions, 1662 flow [2024-06-21 20:32:04,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 178 transitions, 1594 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-21 20:32:04,718 INFO L231 Difference]: Finished difference. Result has 132 places, 142 transitions, 1257 flow [2024-06-21 20:32:04,719 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1084, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1257, PETRI_PLACES=132, PETRI_TRANSITIONS=142} [2024-06-21 20:32:04,719 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 89 predicate places. [2024-06-21 20:32:04,719 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 142 transitions, 1257 flow [2024-06-21 20:32:04,719 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) [2024-06-21 20:32:04,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:32:04,719 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:32:04,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 20:32:04,720 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)] === [2024-06-21 20:32:04,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:32:04,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1474139328, now seen corresponding path program 5 times [2024-06-21 20:32:04,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:32:04,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462836356] [2024-06-21 20:32:04,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:32:04,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:32:04,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:32:05,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:32:05,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:32:05,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462836356] [2024-06-21 20:32:05,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462836356] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:32:05,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:32:05,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:32:05,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224340166] [2024-06-21 20:32:05,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:32:05,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:32:05,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:32:05,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:32:05,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:32:05,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:32:05,623 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 142 transitions, 1257 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) [2024-06-21 20:32:05,623 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:32:05,623 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:32:05,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:32:06,447 INFO L124 PetriNetUnfolderBase]: 2107/3343 cut-off events. [2024-06-21 20:32:06,447 INFO L125 PetriNetUnfolderBase]: For 140736/140740 co-relation queries the response was YES. [2024-06-21 20:32:06,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21670 conditions, 3343 events. 2107/3343 cut-off events. For 140736/140740 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 18149 event pairs, 570 based on Foata normal form. 20/3361 useless extension candidates. Maximal degree in co-relation 21611. Up to 2748 conditions per place. [2024-06-21 20:32:06,474 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 112 selfloop transitions, 63 changer transitions 0/180 dead transitions. [2024-06-21 20:32:06,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 180 transitions, 1777 flow [2024-06-21 20:32:06,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:32:06,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:32:06,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 183 transitions. [2024-06-21 20:32:06,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48412698412698413 [2024-06-21 20:32:06,476 INFO L175 Difference]: Start difference. First operand has 132 places, 142 transitions, 1257 flow. Second operand 9 states and 183 transitions. [2024-06-21 20:32:06,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 180 transitions, 1777 flow [2024-06-21 20:32:06,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 180 transitions, 1632 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-21 20:32:06,573 INFO L231 Difference]: Finished difference. Result has 134 places, 143 transitions, 1283 flow [2024-06-21 20:32:06,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1112, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1283, PETRI_PLACES=134, PETRI_TRANSITIONS=143} [2024-06-21 20:32:06,574 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 91 predicate places. [2024-06-21 20:32:06,574 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 143 transitions, 1283 flow [2024-06-21 20:32:06,574 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) [2024-06-21 20:32:06,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:32:06,574 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:32:06,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 20:32:06,574 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)] === [2024-06-21 20:32:06,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:32:06,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1473991458, now seen corresponding path program 6 times [2024-06-21 20:32:06,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:32:06,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420137370] [2024-06-21 20:32:06,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:32:06,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:32:06,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:32:07,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:32:07,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:32:07,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420137370] [2024-06-21 20:32:07,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420137370] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:32:07,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:32:07,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:32:07,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985249948] [2024-06-21 20:32:07,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:32:07,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:32:07,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:32:07,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:32:07,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:32:07,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:32:07,541 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 143 transitions, 1283 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) [2024-06-21 20:32:07,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:32:07,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:32:07,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:32:08,371 INFO L124 PetriNetUnfolderBase]: 2165/3441 cut-off events. [2024-06-21 20:32:08,371 INFO L125 PetriNetUnfolderBase]: For 146653/146657 co-relation queries the response was YES. [2024-06-21 20:32:08,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22308 conditions, 3441 events. 2165/3441 cut-off events. For 146653/146657 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 18942 event pairs, 556 based on Foata normal form. 16/3455 useless extension candidates. Maximal degree in co-relation 22248. Up to 2616 conditions per place. [2024-06-21 20:32:08,397 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 113 selfloop transitions, 66 changer transitions 0/184 dead transitions. [2024-06-21 20:32:08,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 184 transitions, 1827 flow [2024-06-21 20:32:08,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:32:08,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:32:08,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 185 transitions. [2024-06-21 20:32:08,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4894179894179894 [2024-06-21 20:32:08,399 INFO L175 Difference]: Start difference. First operand has 134 places, 143 transitions, 1283 flow. Second operand 9 states and 185 transitions. [2024-06-21 20:32:08,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 184 transitions, 1827 flow [2024-06-21 20:32:08,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 184 transitions, 1684 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-21 20:32:08,476 INFO L231 Difference]: Finished difference. Result has 136 places, 144 transitions, 1318 flow [2024-06-21 20:32:08,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1140, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1318, PETRI_PLACES=136, PETRI_TRANSITIONS=144} [2024-06-21 20:32:08,477 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 93 predicate places. [2024-06-21 20:32:08,477 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 144 transitions, 1318 flow [2024-06-21 20:32:08,477 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) [2024-06-21 20:32:08,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:32:08,478 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:32:08,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 20:32:08,478 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)] === [2024-06-21 20:32:08,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:32:08,478 INFO L85 PathProgramCache]: Analyzing trace with hash 1479717189, now seen corresponding path program 1 times [2024-06-21 20:32:08,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:32:08,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748864152] [2024-06-21 20:32:08,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:32:08,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:32:08,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:32:09,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:32:09,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:32:09,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748864152] [2024-06-21 20:32:09,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748864152] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:32:09,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:32:09,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:32:09,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135105778] [2024-06-21 20:32:09,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:32:09,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:32:09,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:32:09,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:32:09,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:32:09,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:32:09,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 144 transitions, 1318 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) [2024-06-21 20:32:09,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:32:09,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:32:09,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:32:10,471 INFO L124 PetriNetUnfolderBase]: 2182/3465 cut-off events. [2024-06-21 20:32:10,471 INFO L125 PetriNetUnfolderBase]: For 147498/147504 co-relation queries the response was YES. [2024-06-21 20:32:10,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22572 conditions, 3465 events. 2182/3465 cut-off events. For 147498/147504 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 19086 event pairs, 587 based on Foata normal form. 8/3471 useless extension candidates. Maximal degree in co-relation 22511. Up to 3175 conditions per place. [2024-06-21 20:32:10,494 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 139 selfloop transitions, 37 changer transitions 0/181 dead transitions. [2024-06-21 20:32:10,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 181 transitions, 1839 flow [2024-06-21 20:32:10,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:32:10,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:32:10,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-21 20:32:10,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4576719576719577 [2024-06-21 20:32:10,496 INFO L175 Difference]: Start difference. First operand has 136 places, 144 transitions, 1318 flow. Second operand 9 states and 173 transitions. [2024-06-21 20:32:10,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 181 transitions, 1839 flow [2024-06-21 20:32:10,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 181 transitions, 1677 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-21 20:32:10,573 INFO L231 Difference]: Finished difference. Result has 139 places, 149 transitions, 1314 flow [2024-06-21 20:32:10,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1160, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1314, PETRI_PLACES=139, PETRI_TRANSITIONS=149} [2024-06-21 20:32:10,574 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 96 predicate places. [2024-06-21 20:32:10,574 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 149 transitions, 1314 flow [2024-06-21 20:32:10,574 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) [2024-06-21 20:32:10,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:32:10,574 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:32:10,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 20:32:10,574 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:32:10,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:32:10,575 INFO L85 PathProgramCache]: Analyzing trace with hash -1208039274, now seen corresponding path program 1 times [2024-06-21 20:32:10,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:32:10,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864019796] [2024-06-21 20:32:10,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:32:10,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:32:10,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:32:11,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:32:11,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:32:11,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864019796] [2024-06-21 20:32:11,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864019796] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:32:11,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:32:11,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:32:11,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115343263] [2024-06-21 20:32:11,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:32:11,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:32:11,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:32:11,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:32:11,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:32:11,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 20:32:11,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 149 transitions, 1314 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:32:11,571 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:32:11,571 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 20:32:11,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:32:12,054 INFO L124 PetriNetUnfolderBase]: 1933/3178 cut-off events. [2024-06-21 20:32:12,054 INFO L125 PetriNetUnfolderBase]: For 148979/148991 co-relation queries the response was YES. [2024-06-21 20:32:12,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21194 conditions, 3178 events. 1933/3178 cut-off events. For 148979/148991 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 18303 event pairs, 575 based on Foata normal form. 12/3141 useless extension candidates. Maximal degree in co-relation 21131. Up to 2798 conditions per place. [2024-06-21 20:32:12,080 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 112 selfloop transitions, 25 changer transitions 0/166 dead transitions. [2024-06-21 20:32:12,081 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 166 transitions, 1662 flow [2024-06-21 20:32:12,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:32:12,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:32:12,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-21 20:32:12,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46938775510204084 [2024-06-21 20:32:12,082 INFO L175 Difference]: Start difference. First operand has 139 places, 149 transitions, 1314 flow. Second operand 7 states and 138 transitions. [2024-06-21 20:32:12,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 166 transitions, 1662 flow [2024-06-21 20:32:12,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 166 transitions, 1549 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-21 20:32:12,181 INFO L231 Difference]: Finished difference. Result has 140 places, 152 transitions, 1297 flow [2024-06-21 20:32:12,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1201, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1297, PETRI_PLACES=140, PETRI_TRANSITIONS=152} [2024-06-21 20:32:12,182 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 97 predicate places. [2024-06-21 20:32:12,182 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 152 transitions, 1297 flow [2024-06-21 20:32:12,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:32:12,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:32:12,182 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:32:12,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 20:32:12,182 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)] === [2024-06-21 20:32:12,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:32:12,183 INFO L85 PathProgramCache]: Analyzing trace with hash -1635191698, now seen corresponding path program 7 times [2024-06-21 20:32:12,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:32:12,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146546998] [2024-06-21 20:32:12,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:32:12,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:32:12,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:32:12,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:32:12,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:32:12,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146546998] [2024-06-21 20:32:12,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146546998] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:32:12,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:32:12,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:32:12,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390871457] [2024-06-21 20:32:12,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:32:12,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:32:12,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:32:12,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:32:12,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:32:13,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:32:13,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 152 transitions, 1297 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) [2024-06-21 20:32:13,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:32:13,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:32:13,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:32:13,996 INFO L124 PetriNetUnfolderBase]: 2267/3609 cut-off events. [2024-06-21 20:32:13,996 INFO L125 PetriNetUnfolderBase]: For 171240/171245 co-relation queries the response was YES. [2024-06-21 20:32:14,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24008 conditions, 3609 events. 2267/3609 cut-off events. For 171240/171245 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 20037 event pairs, 572 based on Foata normal form. 20/3623 useless extension candidates. Maximal degree in co-relation 23944. Up to 3012 conditions per place. [2024-06-21 20:32:14,023 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 115 selfloop transitions, 67 changer transitions 0/187 dead transitions. [2024-06-21 20:32:14,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 187 transitions, 1837 flow [2024-06-21 20:32:14,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:32:14,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:32:14,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-21 20:32:14,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4656084656084656 [2024-06-21 20:32:14,024 INFO L175 Difference]: Start difference. First operand has 140 places, 152 transitions, 1297 flow. Second operand 9 states and 176 transitions. [2024-06-21 20:32:14,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 187 transitions, 1837 flow [2024-06-21 20:32:14,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 187 transitions, 1763 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-21 20:32:14,111 INFO L231 Difference]: Finished difference. Result has 144 places, 153 transitions, 1408 flow [2024-06-21 20:32:14,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1223, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1408, PETRI_PLACES=144, PETRI_TRANSITIONS=153} [2024-06-21 20:32:14,112 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 101 predicate places. [2024-06-21 20:32:14,112 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 153 transitions, 1408 flow [2024-06-21 20:32:14,112 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) [2024-06-21 20:32:14,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:32:14,112 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:32:14,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 20:32:14,112 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)] === [2024-06-21 20:32:14,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:32:14,113 INFO L85 PathProgramCache]: Analyzing trace with hash -110192756, now seen corresponding path program 8 times [2024-06-21 20:32:14,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:32:14,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967412711] [2024-06-21 20:32:14,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:32:14,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:32:14,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:32:14,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:32:14,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:32:14,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967412711] [2024-06-21 20:32:14,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967412711] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:32:14,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:32:14,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:32:14,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086173862] [2024-06-21 20:32:14,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:32:14,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:32:14,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:32:14,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:32:14,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:32:14,870 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:32:14,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 153 transitions, 1408 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) [2024-06-21 20:32:14,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:32:14,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:32:14,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:32:15,655 INFO L124 PetriNetUnfolderBase]: 2342/3729 cut-off events. [2024-06-21 20:32:15,655 INFO L125 PetriNetUnfolderBase]: For 184851/184856 co-relation queries the response was YES. [2024-06-21 20:32:15,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25291 conditions, 3729 events. 2342/3729 cut-off events. For 184851/184856 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 20823 event pairs, 577 based on Foata normal form. 20/3743 useless extension candidates. Maximal degree in co-relation 25226. Up to 3137 conditions per place. [2024-06-21 20:32:15,684 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 121 selfloop transitions, 63 changer transitions 0/189 dead transitions. [2024-06-21 20:32:15,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 189 transitions, 1960 flow [2024-06-21 20:32:15,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:32:15,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:32:15,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-21 20:32:15,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47354497354497355 [2024-06-21 20:32:15,686 INFO L175 Difference]: Start difference. First operand has 144 places, 153 transitions, 1408 flow. Second operand 9 states and 179 transitions. [2024-06-21 20:32:15,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 189 transitions, 1960 flow [2024-06-21 20:32:15,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 189 transitions, 1803 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-21 20:32:15,816 INFO L231 Difference]: Finished difference. Result has 146 places, 154 transitions, 1430 flow [2024-06-21 20:32:15,816 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1251, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1430, PETRI_PLACES=146, PETRI_TRANSITIONS=154} [2024-06-21 20:32:15,816 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 103 predicate places. [2024-06-21 20:32:15,816 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 154 transitions, 1430 flow [2024-06-21 20:32:15,817 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) [2024-06-21 20:32:15,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:32:15,817 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:32:15,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 20:32:15,817 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)] === [2024-06-21 20:32:15,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:32:15,817 INFO L85 PathProgramCache]: Analyzing trace with hash -115555136, now seen corresponding path program 9 times [2024-06-21 20:32:15,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:32:15,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857468862] [2024-06-21 20:32:15,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:32:15,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:32:15,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:32:16,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:32:16,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:32:16,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857468862] [2024-06-21 20:32:16,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857468862] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:32:16,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:32:16,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:32:16,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124731432] [2024-06-21 20:32:16,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:32:16,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:32:16,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:32:16,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:32:16,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:32:16,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:32:16,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 154 transitions, 1430 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) [2024-06-21 20:32:16,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:32:16,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:32:16,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:32:17,737 INFO L124 PetriNetUnfolderBase]: 2417/3869 cut-off events. [2024-06-21 20:32:17,737 INFO L125 PetriNetUnfolderBase]: For 195532/195537 co-relation queries the response was YES. [2024-06-21 20:32:17,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26156 conditions, 3869 events. 2417/3869 cut-off events. For 195532/195537 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 21961 event pairs, 601 based on Foata normal form. 20/3883 useless extension candidates. Maximal degree in co-relation 26090. Up to 3262 conditions per place. [2024-06-21 20:32:17,767 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 121 selfloop transitions, 64 changer transitions 0/190 dead transitions. [2024-06-21 20:32:17,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 190 transitions, 1986 flow [2024-06-21 20:32:17,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:32:17,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:32:17,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-21 20:32:17,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4708994708994709 [2024-06-21 20:32:17,768 INFO L175 Difference]: Start difference. First operand has 146 places, 154 transitions, 1430 flow. Second operand 9 states and 178 transitions. [2024-06-21 20:32:17,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 190 transitions, 1986 flow [2024-06-21 20:32:17,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 190 transitions, 1835 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-21 20:32:17,914 INFO L231 Difference]: Finished difference. Result has 148 places, 155 transitions, 1462 flow [2024-06-21 20:32:17,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1279, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1462, PETRI_PLACES=148, PETRI_TRANSITIONS=155} [2024-06-21 20:32:17,914 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 105 predicate places. [2024-06-21 20:32:17,914 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 155 transitions, 1462 flow [2024-06-21 20:32:17,915 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) [2024-06-21 20:32:17,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:32:17,915 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:32:17,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 20:32:17,916 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)] === [2024-06-21 20:32:17,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:32:17,916 INFO L85 PathProgramCache]: Analyzing trace with hash -115703006, now seen corresponding path program 10 times [2024-06-21 20:32:17,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:32:17,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337847501] [2024-06-21 20:32:17,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:32:17,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:32:17,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:32:18,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:32:18,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:32:18,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337847501] [2024-06-21 20:32:18,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337847501] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:32:18,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:32:18,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:32:18,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136154036] [2024-06-21 20:32:18,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:32:18,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:32:18,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:32:18,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:32:18,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:32:18,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:32:18,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 155 transitions, 1462 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) [2024-06-21 20:32:18,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:32:18,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:32:18,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:32:19,783 INFO L124 PetriNetUnfolderBase]: 2425/3889 cut-off events. [2024-06-21 20:32:19,783 INFO L125 PetriNetUnfolderBase]: For 194195/194200 co-relation queries the response was YES. [2024-06-21 20:32:19,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25976 conditions, 3889 events. 2425/3889 cut-off events. For 194195/194200 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 22085 event pairs, 583 based on Foata normal form. 16/3899 useless extension candidates. Maximal degree in co-relation 25909. Up to 2932 conditions per place. [2024-06-21 20:32:19,814 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 121 selfloop transitions, 68 changer transitions 0/194 dead transitions. [2024-06-21 20:32:19,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 194 transitions, 2042 flow [2024-06-21 20:32:19,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:32:19,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:32:19,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 180 transitions. [2024-06-21 20:32:19,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-21 20:32:19,816 INFO L175 Difference]: Start difference. First operand has 148 places, 155 transitions, 1462 flow. Second operand 9 states and 180 transitions. [2024-06-21 20:32:19,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 194 transitions, 2042 flow [2024-06-21 20:32:19,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 194 transitions, 1887 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-21 20:32:19,961 INFO L231 Difference]: Finished difference. Result has 150 places, 156 transitions, 1499 flow [2024-06-21 20:32:19,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1307, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1499, PETRI_PLACES=150, PETRI_TRANSITIONS=156} [2024-06-21 20:32:19,962 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 107 predicate places. [2024-06-21 20:32:19,962 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 156 transitions, 1499 flow [2024-06-21 20:32:19,962 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) [2024-06-21 20:32:19,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:32:19,962 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:32:19,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 20:32:19,962 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:32:19,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:32:19,963 INFO L85 PathProgramCache]: Analyzing trace with hash -1634976217, now seen corresponding path program 2 times [2024-06-21 20:32:19,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:32:19,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070437111] [2024-06-21 20:32:19,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:32:19,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:32:19,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:32:20,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:32:20,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:32:20,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070437111] [2024-06-21 20:32:20,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070437111] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:32:20,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:32:20,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:32:20,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651352516] [2024-06-21 20:32:20,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:32:20,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:32:20,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:32:20,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:32:20,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:32:21,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:32:21,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 156 transitions, 1499 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) [2024-06-21 20:32:21,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:32:21,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:32:21,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:32:21,901 INFO L124 PetriNetUnfolderBase]: 2453/3955 cut-off events. [2024-06-21 20:32:21,901 INFO L125 PetriNetUnfolderBase]: For 191521/191530 co-relation queries the response was YES. [2024-06-21 20:32:21,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26279 conditions, 3955 events. 2453/3955 cut-off events. For 191521/191530 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 22761 event pairs, 662 based on Foata normal form. 12/3963 useless extension candidates. Maximal degree in co-relation 26211. Up to 3623 conditions per place. [2024-06-21 20:32:21,948 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 147 selfloop transitions, 40 changer transitions 0/192 dead transitions. [2024-06-21 20:32:21,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 192 transitions, 2060 flow [2024-06-21 20:32:21,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:32:21,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:32:21,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-21 20:32:21,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-21 20:32:21,950 INFO L175 Difference]: Start difference. First operand has 150 places, 156 transitions, 1499 flow. Second operand 9 states and 169 transitions. [2024-06-21 20:32:21,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 192 transitions, 2060 flow [2024-06-21 20:32:22,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 192 transitions, 1882 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-21 20:32:22,132 INFO L231 Difference]: Finished difference. Result has 153 places, 162 transitions, 1509 flow [2024-06-21 20:32:22,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1327, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1509, PETRI_PLACES=153, PETRI_TRANSITIONS=162} [2024-06-21 20:32:22,133 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 110 predicate places. [2024-06-21 20:32:22,133 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 162 transitions, 1509 flow [2024-06-21 20:32:22,133 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) [2024-06-21 20:32:22,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:32:22,133 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:32:22,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 20:32:22,134 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)] === [2024-06-21 20:32:22,134 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:32:22,134 INFO L85 PathProgramCache]: Analyzing trace with hash -109977275, now seen corresponding path program 3 times [2024-06-21 20:32:22,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:32:22,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412026316] [2024-06-21 20:32:22,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:32:22,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:32:22,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:32:23,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:32:23,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:32:23,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412026316] [2024-06-21 20:32:23,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412026316] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:32:23,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:32:23,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:32:23,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128400296] [2024-06-21 20:32:23,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:32:23,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:32:23,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:32:23,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:32:23,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:32:23,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:32:23,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 162 transitions, 1509 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) [2024-06-21 20:32:23,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:32:23,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:32:23,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:32:24,236 INFO L124 PetriNetUnfolderBase]: 2470/3972 cut-off events. [2024-06-21 20:32:24,237 INFO L125 PetriNetUnfolderBase]: For 197233/197242 co-relation queries the response was YES. [2024-06-21 20:32:24,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26564 conditions, 3972 events. 2470/3972 cut-off events. For 197233/197242 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 22827 event pairs, 652 based on Foata normal form. 12/3980 useless extension candidates. Maximal degree in co-relation 26494. Up to 3650 conditions per place. [2024-06-21 20:32:24,265 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 150 selfloop transitions, 41 changer transitions 0/196 dead transitions. [2024-06-21 20:32:24,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 196 transitions, 2070 flow [2024-06-21 20:32:24,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:32:24,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:32:24,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-21 20:32:24,267 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4497354497354497 [2024-06-21 20:32:24,267 INFO L175 Difference]: Start difference. First operand has 153 places, 162 transitions, 1509 flow. Second operand 9 states and 170 transitions. [2024-06-21 20:32:24,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 196 transitions, 2070 flow [2024-06-21 20:32:24,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 196 transitions, 1933 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-21 20:32:24,393 INFO L231 Difference]: Finished difference. Result has 157 places, 167 transitions, 1558 flow [2024-06-21 20:32:24,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1376, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1558, PETRI_PLACES=157, PETRI_TRANSITIONS=167} [2024-06-21 20:32:24,394 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 114 predicate places. [2024-06-21 20:32:24,394 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 167 transitions, 1558 flow [2024-06-21 20:32:24,394 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) [2024-06-21 20:32:24,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:32:24,394 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:32:24,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 20:32:24,394 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)] === [2024-06-21 20:32:24,395 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:32:24,395 INFO L85 PathProgramCache]: Analyzing trace with hash -1627826377, now seen corresponding path program 4 times [2024-06-21 20:32:24,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:32:24,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338713905] [2024-06-21 20:32:24,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:32:24,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:32:24,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:32:25,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:32:25,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:32:25,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338713905] [2024-06-21 20:32:25,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338713905] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:32:25,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:32:25,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:32:25,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527312264] [2024-06-21 20:32:25,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:32:25,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:32:25,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:32:25,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:32:25,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:32:25,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:32:25,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 167 transitions, 1558 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) [2024-06-21 20:32:25,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:32:25,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:32:25,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:32:26,596 INFO L124 PetriNetUnfolderBase]: 2487/3999 cut-off events. [2024-06-21 20:32:26,597 INFO L125 PetriNetUnfolderBase]: For 207199/207208 co-relation queries the response was YES. [2024-06-21 20:32:26,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27234 conditions, 3999 events. 2487/3999 cut-off events. For 207199/207208 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 22967 event pairs, 657 based on Foata normal form. 12/4007 useless extension candidates. Maximal degree in co-relation 27162. Up to 3677 conditions per place. [2024-06-21 20:32:26,633 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 149 selfloop transitions, 46 changer transitions 0/200 dead transitions. [2024-06-21 20:32:26,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 200 transitions, 2125 flow [2024-06-21 20:32:26,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:32:26,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:32:26,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-21 20:32:26,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-21 20:32:26,635 INFO L175 Difference]: Start difference. First operand has 157 places, 167 transitions, 1558 flow. Second operand 9 states and 168 transitions. [2024-06-21 20:32:26,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 200 transitions, 2125 flow [2024-06-21 20:32:26,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 200 transitions, 1980 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-21 20:32:26,749 INFO L231 Difference]: Finished difference. Result has 160 places, 171 transitions, 1601 flow [2024-06-21 20:32:26,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1417, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1601, PETRI_PLACES=160, PETRI_TRANSITIONS=171} [2024-06-21 20:32:26,749 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 117 predicate places. [2024-06-21 20:32:26,750 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 171 transitions, 1601 flow [2024-06-21 20:32:26,750 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) [2024-06-21 20:32:26,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:32:26,750 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:32:26,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 20:32:26,750 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)] === [2024-06-21 20:32:26,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:32:26,751 INFO L85 PathProgramCache]: Analyzing trace with hash -1368952507, now seen corresponding path program 5 times [2024-06-21 20:32:26,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:32:26,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819588226] [2024-06-21 20:32:26,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:32:26,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:32:26,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:32:27,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:32:27,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:32:27,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819588226] [2024-06-21 20:32:27,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819588226] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:32:27,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:32:27,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:32:27,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738308370] [2024-06-21 20:32:27,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:32:27,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:32:27,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:32:27,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:32:27,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:32:27,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:32:27,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 171 transitions, 1601 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) [2024-06-21 20:32:27,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:32:27,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:32:27,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:32:28,761 INFO L124 PetriNetUnfolderBase]: 2479/3977 cut-off events. [2024-06-21 20:32:28,761 INFO L125 PetriNetUnfolderBase]: For 211556/211562 co-relation queries the response was YES. [2024-06-21 20:32:28,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27180 conditions, 3977 events. 2479/3977 cut-off events. For 211556/211562 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 22748 event pairs, 583 based on Foata normal form. 10/3983 useless extension candidates. Maximal degree in co-relation 27107. Up to 3570 conditions per place. [2024-06-21 20:32:28,796 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 141 selfloop transitions, 58 changer transitions 0/204 dead transitions. [2024-06-21 20:32:28,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 204 transitions, 2173 flow [2024-06-21 20:32:28,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:32:28,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:32:28,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 181 transitions. [2024-06-21 20:32:28,798 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.430952380952381 [2024-06-21 20:32:28,798 INFO L175 Difference]: Start difference. First operand has 160 places, 171 transitions, 1601 flow. Second operand 10 states and 181 transitions. [2024-06-21 20:32:28,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 204 transitions, 2173 flow [2024-06-21 20:32:28,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 204 transitions, 2038 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-21 20:32:28,946 INFO L231 Difference]: Finished difference. Result has 166 places, 175 transitions, 1685 flow [2024-06-21 20:32:28,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1468, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1685, PETRI_PLACES=166, PETRI_TRANSITIONS=175} [2024-06-21 20:32:28,947 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 123 predicate places. [2024-06-21 20:32:28,947 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 175 transitions, 1685 flow [2024-06-21 20:32:28,947 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) [2024-06-21 20:32:28,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:32:28,947 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:32:28,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 20:32:28,947 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:32:28,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:32:28,948 INFO L85 PathProgramCache]: Analyzing trace with hash -823808844, now seen corresponding path program 2 times [2024-06-21 20:32:28,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:32:28,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186581082] [2024-06-21 20:32:28,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:32:28,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:32:28,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:32:29,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:32:29,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:32:29,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186581082] [2024-06-21 20:32:29,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186581082] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:32:29,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:32:29,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:32:29,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245727274] [2024-06-21 20:32:29,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:32:29,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:32:29,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:32:29,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:32:29,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:32:30,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 20:32:30,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 175 transitions, 1685 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:32:30,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:32:30,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 20:32:30,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:32:30,657 INFO L124 PetriNetUnfolderBase]: 2222/3695 cut-off events. [2024-06-21 20:32:30,657 INFO L125 PetriNetUnfolderBase]: For 216240/216260 co-relation queries the response was YES. [2024-06-21 20:32:30,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25561 conditions, 3695 events. 2222/3695 cut-off events. For 216240/216260 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 22285 event pairs, 650 based on Foata normal form. 12/3646 useless extension candidates. Maximal degree in co-relation 25486. Up to 3244 conditions per place. [2024-06-21 20:32:30,692 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 120 selfloop transitions, 36 changer transitions 0/193 dead transitions. [2024-06-21 20:32:30,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 193 transitions, 2203 flow [2024-06-21 20:32:30,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:32:30,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:32:30,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-21 20:32:30,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46258503401360546 [2024-06-21 20:32:30,694 INFO L175 Difference]: Start difference. First operand has 166 places, 175 transitions, 1685 flow. Second operand 7 states and 136 transitions. [2024-06-21 20:32:30,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 193 transitions, 2203 flow [2024-06-21 20:32:30,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 193 transitions, 2036 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-21 20:32:30,848 INFO L231 Difference]: Finished difference. Result has 168 places, 183 transitions, 1705 flow [2024-06-21 20:32:30,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1518, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1705, PETRI_PLACES=168, PETRI_TRANSITIONS=183} [2024-06-21 20:32:30,848 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 125 predicate places. [2024-06-21 20:32:30,849 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 183 transitions, 1705 flow [2024-06-21 20:32:30,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:32:30,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:32:30,849 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:32:30,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 20:32:30,849 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:32:30,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:32:30,850 INFO L85 PathProgramCache]: Analyzing trace with hash -824254314, now seen corresponding path program 3 times [2024-06-21 20:32:30,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:32:30,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885115721] [2024-06-21 20:32:30,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:32:30,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:32:30,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:32:31,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:32:31,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:32:31,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885115721] [2024-06-21 20:32:31,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885115721] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:32:31,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:32:31,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:32:31,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87953113] [2024-06-21 20:32:31,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:32:31,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:32:31,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:32:31,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:32:31,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:32:31,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 20:32:31,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 183 transitions, 1705 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:32:31,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:32:31,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 20:32:31,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:32:32,415 INFO L124 PetriNetUnfolderBase]: 2215/3665 cut-off events. [2024-06-21 20:32:32,416 INFO L125 PetriNetUnfolderBase]: For 225508/225528 co-relation queries the response was YES. [2024-06-21 20:32:32,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25896 conditions, 3665 events. 2215/3665 cut-off events. For 225508/225528 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 21868 event pairs, 619 based on Foata normal form. 11/3616 useless extension candidates. Maximal degree in co-relation 25818. Up to 3250 conditions per place. [2024-06-21 20:32:32,450 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 127 selfloop transitions, 29 changer transitions 0/193 dead transitions. [2024-06-21 20:32:32,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 193 transitions, 2048 flow [2024-06-21 20:32:32,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:32:32,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:32:32,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-21 20:32:32,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4557823129251701 [2024-06-21 20:32:32,451 INFO L175 Difference]: Start difference. First operand has 168 places, 183 transitions, 1705 flow. Second operand 7 states and 134 transitions. [2024-06-21 20:32:32,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 193 transitions, 2048 flow [2024-06-21 20:32:32,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 193 transitions, 1956 flow, removed 30 selfloop flow, removed 3 redundant places. [2024-06-21 20:32:32,654 INFO L231 Difference]: Finished difference. Result has 172 places, 184 transitions, 1686 flow [2024-06-21 20:32:32,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1613, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1686, PETRI_PLACES=172, PETRI_TRANSITIONS=184} [2024-06-21 20:32:32,654 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 129 predicate places. [2024-06-21 20:32:32,654 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 184 transitions, 1686 flow [2024-06-21 20:32:32,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:32:32,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:32:32,655 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:32:32,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 20:32:32,655 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:32:32,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:32:32,655 INFO L85 PathProgramCache]: Analyzing trace with hash -1030873189, now seen corresponding path program 1 times [2024-06-21 20:32:32,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:32:32,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163119090] [2024-06-21 20:32:32,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:32:32,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:32:32,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:32:33,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:32:33,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:32:33,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163119090] [2024-06-21 20:32:33,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163119090] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:32:33,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:32:33,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:32:33,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925422464] [2024-06-21 20:32:33,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:32:33,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:32:33,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:32:33,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:32:33,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:32:33,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 20:32:33,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 184 transitions, 1686 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 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) [2024-06-21 20:32:33,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:32:33,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 20:32:33,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:32:34,092 INFO L124 PetriNetUnfolderBase]: 2387/3890 cut-off events. [2024-06-21 20:32:34,093 INFO L125 PetriNetUnfolderBase]: For 233199/233199 co-relation queries the response was YES. [2024-06-21 20:32:34,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27308 conditions, 3890 events. 2387/3890 cut-off events. For 233199/233199 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 22604 event pairs, 615 based on Foata normal form. 2/3890 useless extension candidates. Maximal degree in co-relation 27228. Up to 3613 conditions per place. [2024-06-21 20:32:34,132 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 178 selfloop transitions, 15 changer transitions 0/203 dead transitions. [2024-06-21 20:32:34,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 203 transitions, 2166 flow [2024-06-21 20:32:34,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:32:34,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:32:34,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-21 20:32:34,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-21 20:32:34,134 INFO L175 Difference]: Start difference. First operand has 172 places, 184 transitions, 1686 flow. Second operand 7 states and 133 transitions. [2024-06-21 20:32:34,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 203 transitions, 2166 flow [2024-06-21 20:32:34,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 203 transitions, 2104 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-21 20:32:34,311 INFO L231 Difference]: Finished difference. Result has 174 places, 187 transitions, 1706 flow [2024-06-21 20:32:34,311 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1624, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1706, PETRI_PLACES=174, PETRI_TRANSITIONS=187} [2024-06-21 20:32:34,311 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 131 predicate places. [2024-06-21 20:32:34,311 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 187 transitions, 1706 flow [2024-06-21 20:32:34,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 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) [2024-06-21 20:32:34,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:32:34,312 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:32:34,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 20:32:34,312 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:32:34,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:32:34,313 INFO L85 PathProgramCache]: Analyzing trace with hash -831421669, now seen corresponding path program 2 times [2024-06-21 20:32:34,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:32:34,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864698963] [2024-06-21 20:32:34,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:32:34,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:32:34,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:32:35,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:32:35,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:32:35,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864698963] [2024-06-21 20:32:35,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864698963] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:32:35,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:32:35,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:32:35,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534606056] [2024-06-21 20:32:35,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:32:35,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:32:35,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:32:35,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:32:35,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:32:35,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 20:32:35,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 187 transitions, 1706 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 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) [2024-06-21 20:32:35,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:32:35,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 20:32:35,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:32:36,019 INFO L124 PetriNetUnfolderBase]: 2397/3906 cut-off events. [2024-06-21 20:32:36,019 INFO L125 PetriNetUnfolderBase]: For 242123/242123 co-relation queries the response was YES. [2024-06-21 20:32:36,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27890 conditions, 3906 events. 2397/3906 cut-off events. For 242123/242123 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 22679 event pairs, 615 based on Foata normal form. 2/3906 useless extension candidates. Maximal degree in co-relation 27809. Up to 3618 conditions per place. [2024-06-21 20:32:36,059 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 174 selfloop transitions, 20 changer transitions 0/204 dead transitions. [2024-06-21 20:32:36,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 204 transitions, 2194 flow [2024-06-21 20:32:36,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:32:36,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:32:36,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-21 20:32:36,060 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-21 20:32:36,060 INFO L175 Difference]: Start difference. First operand has 174 places, 187 transitions, 1706 flow. Second operand 7 states and 133 transitions. [2024-06-21 20:32:36,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 204 transitions, 2194 flow [2024-06-21 20:32:36,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 204 transitions, 2134 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-21 20:32:36,263 INFO L231 Difference]: Finished difference. Result has 176 places, 190 transitions, 1744 flow [2024-06-21 20:32:36,264 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1646, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1744, PETRI_PLACES=176, PETRI_TRANSITIONS=190} [2024-06-21 20:32:36,264 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 133 predicate places. [2024-06-21 20:32:36,264 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 190 transitions, 1744 flow [2024-06-21 20:32:36,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 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) [2024-06-21 20:32:36,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:32:36,264 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:32:36,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 20:32:36,265 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:32:36,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:32:36,265 INFO L85 PathProgramCache]: Analyzing trace with hash -831421452, now seen corresponding path program 1 times [2024-06-21 20:32:36,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:32:36,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322578442] [2024-06-21 20:32:36,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:32:36,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:32:36,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:32:37,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:32:37,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:32:37,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322578442] [2024-06-21 20:32:37,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322578442] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:32:37,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:32:37,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:32:37,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261565223] [2024-06-21 20:32:37,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:32:37,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:32:37,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:32:37,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:32:37,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:32:37,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 20:32:37,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 190 transitions, 1744 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 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) [2024-06-21 20:32:37,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:32:37,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 20:32:37,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:32:38,065 INFO L124 PetriNetUnfolderBase]: 2407/3922 cut-off events. [2024-06-21 20:32:38,065 INFO L125 PetriNetUnfolderBase]: For 253099/253099 co-relation queries the response was YES. [2024-06-21 20:32:38,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28488 conditions, 3922 events. 2407/3922 cut-off events. For 253099/253099 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 22789 event pairs, 614 based on Foata normal form. 3/3923 useless extension candidates. Maximal degree in co-relation 28406. Up to 3647 conditions per place. [2024-06-21 20:32:38,104 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 181 selfloop transitions, 15 changer transitions 0/206 dead transitions. [2024-06-21 20:32:38,104 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 206 transitions, 2218 flow [2024-06-21 20:32:38,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:32:38,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:32:38,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-21 20:32:38,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4421768707482993 [2024-06-21 20:32:38,105 INFO L175 Difference]: Start difference. First operand has 176 places, 190 transitions, 1744 flow. Second operand 7 states and 130 transitions. [2024-06-21 20:32:38,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 206 transitions, 2218 flow [2024-06-21 20:32:38,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 206 transitions, 2142 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-21 20:32:38,366 INFO L231 Difference]: Finished difference. Result has 178 places, 193 transitions, 1754 flow [2024-06-21 20:32:38,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1668, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1754, PETRI_PLACES=178, PETRI_TRANSITIONS=193} [2024-06-21 20:32:38,367 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 135 predicate places. [2024-06-21 20:32:38,367 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 193 transitions, 1754 flow [2024-06-21 20:32:38,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 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) [2024-06-21 20:32:38,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:32:38,367 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:32:38,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 20:32:38,367 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:32:38,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:32:38,368 INFO L85 PathProgramCache]: Analyzing trace with hash -824069802, now seen corresponding path program 2 times [2024-06-21 20:32:38,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:32:38,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297911042] [2024-06-21 20:32:38,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:32:38,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:32:38,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:32:39,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:32:39,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:32:39,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297911042] [2024-06-21 20:32:39,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297911042] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:32:39,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:32:39,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:32:39,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507523472] [2024-06-21 20:32:39,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:32:39,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:32:39,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:32:39,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:32:39,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:32:39,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 20:32:39,516 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 193 transitions, 1754 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 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) [2024-06-21 20:32:39,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:32:39,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 20:32:39,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:32:40,227 INFO L124 PetriNetUnfolderBase]: 2422/3944 cut-off events. [2024-06-21 20:32:40,227 INFO L125 PetriNetUnfolderBase]: For 261745/261747 co-relation queries the response was YES. [2024-06-21 20:32:40,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29020 conditions, 3944 events. 2422/3944 cut-off events. For 261745/261747 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 22919 event pairs, 617 based on Foata normal form. 5/3947 useless extension candidates. Maximal degree in co-relation 28937. Up to 3660 conditions per place. [2024-06-21 20:32:40,262 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 176 selfloop transitions, 20 changer transitions 0/206 dead transitions. [2024-06-21 20:32:40,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 206 transitions, 2224 flow [2024-06-21 20:32:40,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:32:40,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:32:40,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-21 20:32:40,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4387755102040816 [2024-06-21 20:32:40,263 INFO L175 Difference]: Start difference. First operand has 178 places, 193 transitions, 1754 flow. Second operand 7 states and 129 transitions. [2024-06-21 20:32:40,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 206 transitions, 2224 flow [2024-06-21 20:32:40,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 206 transitions, 2162 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-21 20:32:40,457 INFO L231 Difference]: Finished difference. Result has 180 places, 196 transitions, 1794 flow [2024-06-21 20:32:40,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1692, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1794, PETRI_PLACES=180, PETRI_TRANSITIONS=196} [2024-06-21 20:32:40,458 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 137 predicate places. [2024-06-21 20:32:40,458 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 196 transitions, 1794 flow [2024-06-21 20:32:40,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 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) [2024-06-21 20:32:40,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:32:40,458 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:32:40,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 20:32:40,458 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:32:40,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:32:40,459 INFO L85 PathProgramCache]: Analyzing trace with hash -824070019, now seen corresponding path program 3 times [2024-06-21 20:32:40,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:32:40,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107139191] [2024-06-21 20:32:40,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:32:40,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:32:40,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:32:41,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:32:41,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:32:41,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107139191] [2024-06-21 20:32:41,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107139191] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:32:41,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:32:41,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:32:41,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207821982] [2024-06-21 20:32:41,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:32:41,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:32:41,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:32:41,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:32:41,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:32:41,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 20:32:41,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 196 transitions, 1794 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 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) [2024-06-21 20:32:41,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:32:41,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 20:32:41,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:32:42,039 INFO L124 PetriNetUnfolderBase]: 2424/3949 cut-off events. [2024-06-21 20:32:42,040 INFO L125 PetriNetUnfolderBase]: For 267740/267742 co-relation queries the response was YES. [2024-06-21 20:32:42,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29386 conditions, 3949 events. 2424/3949 cut-off events. For 267740/267742 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 22970 event pairs, 621 based on Foata normal form. 2/3949 useless extension candidates. Maximal degree in co-relation 29302. Up to 3642 conditions per place. [2024-06-21 20:32:42,074 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 173 selfloop transitions, 27 changer transitions 0/210 dead transitions. [2024-06-21 20:32:42,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 210 transitions, 2294 flow [2024-06-21 20:32:42,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:32:42,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:32:42,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-21 20:32:42,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4489795918367347 [2024-06-21 20:32:42,076 INFO L175 Difference]: Start difference. First operand has 180 places, 196 transitions, 1794 flow. Second operand 7 states and 132 transitions. [2024-06-21 20:32:42,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 210 transitions, 2294 flow [2024-06-21 20:32:42,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 210 transitions, 2216 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-21 20:32:42,364 INFO L231 Difference]: Finished difference. Result has 182 places, 199 transitions, 1838 flow [2024-06-21 20:32:42,364 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1716, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1838, PETRI_PLACES=182, PETRI_TRANSITIONS=199} [2024-06-21 20:32:42,365 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 139 predicate places. [2024-06-21 20:32:42,365 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 199 transitions, 1838 flow [2024-06-21 20:32:42,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 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) [2024-06-21 20:32:42,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:32:42,365 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:32:42,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 20:32:42,366 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:32:42,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:32:42,366 INFO L85 PathProgramCache]: Analyzing trace with hash -823802892, now seen corresponding path program 3 times [2024-06-21 20:32:42,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:32:42,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831566634] [2024-06-21 20:32:42,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:32:42,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:32:42,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:32:43,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:32:43,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:32:43,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831566634] [2024-06-21 20:32:43,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831566634] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:32:43,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:32:43,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:32:43,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424137537] [2024-06-21 20:32:43,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:32:43,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:32:43,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:32:43,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:32:43,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:32:43,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 20:32:43,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 199 transitions, 1838 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 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) [2024-06-21 20:32:43,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:32:43,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 20:32:43,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:32:44,225 INFO L124 PetriNetUnfolderBase]: 2417/3940 cut-off events. [2024-06-21 20:32:44,226 INFO L125 PetriNetUnfolderBase]: For 275667/275669 co-relation queries the response was YES. [2024-06-21 20:32:44,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29632 conditions, 3940 events. 2417/3940 cut-off events. For 275667/275669 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 23015 event pairs, 614 based on Foata normal form. 5/3943 useless extension candidates. Maximal degree in co-relation 29547. Up to 3630 conditions per place. [2024-06-21 20:32:44,260 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 175 selfloop transitions, 32 changer transitions 0/217 dead transitions. [2024-06-21 20:32:44,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 217 transitions, 2504 flow [2024-06-21 20:32:44,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:32:44,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:32:44,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-21 20:32:44,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4489795918367347 [2024-06-21 20:32:44,262 INFO L175 Difference]: Start difference. First operand has 182 places, 199 transitions, 1838 flow. Second operand 7 states and 132 transitions. [2024-06-21 20:32:44,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 217 transitions, 2504 flow [2024-06-21 20:32:44,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 217 transitions, 2404 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-21 20:32:44,507 INFO L231 Difference]: Finished difference. Result has 185 places, 205 transitions, 1946 flow [2024-06-21 20:32:44,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1738, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1946, PETRI_PLACES=185, PETRI_TRANSITIONS=205} [2024-06-21 20:32:44,507 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 142 predicate places. [2024-06-21 20:32:44,507 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 205 transitions, 1946 flow [2024-06-21 20:32:44,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 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) [2024-06-21 20:32:44,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:32:44,508 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:32:44,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 20:32:44,508 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:32:44,508 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:32:44,508 INFO L85 PathProgramCache]: Analyzing trace with hash -823792972, now seen corresponding path program 1 times [2024-06-21 20:32:44,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:32:44,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465049283] [2024-06-21 20:32:44,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:32:44,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:32:44,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:32:45,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:32:45,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:32:45,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465049283] [2024-06-21 20:32:45,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465049283] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:32:45,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:32:45,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:32:45,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072299333] [2024-06-21 20:32:45,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:32:45,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:32:45,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:32:45,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:32:45,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:32:45,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 20:32:45,989 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 205 transitions, 1946 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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) [2024-06-21 20:32:45,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:32:45,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 20:32:45,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:32:46,602 INFO L124 PetriNetUnfolderBase]: 2247/3729 cut-off events. [2024-06-21 20:32:46,603 INFO L125 PetriNetUnfolderBase]: For 282574/282586 co-relation queries the response was YES. [2024-06-21 20:32:46,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28897 conditions, 3729 events. 2247/3729 cut-off events. For 282574/282586 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 22412 event pairs, 612 based on Foata normal form. 9/3689 useless extension candidates. Maximal degree in co-relation 28810. Up to 3332 conditions per place. [2024-06-21 20:32:46,638 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 157 selfloop transitions, 18 changer transitions 0/215 dead transitions. [2024-06-21 20:32:46,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 215 transitions, 2322 flow [2024-06-21 20:32:46,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:32:46,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:32:46,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-21 20:32:46,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-21 20:32:46,640 INFO L175 Difference]: Start difference. First operand has 185 places, 205 transitions, 1946 flow. Second operand 8 states and 148 transitions. [2024-06-21 20:32:46,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 215 transitions, 2322 flow [2024-06-21 20:32:46,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 215 transitions, 2221 flow, removed 41 selfloop flow, removed 3 redundant places. [2024-06-21 20:32:46,850 INFO L231 Difference]: Finished difference. Result has 190 places, 205 transitions, 1887 flow [2024-06-21 20:32:46,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1845, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1887, PETRI_PLACES=190, PETRI_TRANSITIONS=205} [2024-06-21 20:32:46,851 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 147 predicate places. [2024-06-21 20:32:46,851 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 205 transitions, 1887 flow [2024-06-21 20:32:46,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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) [2024-06-21 20:32:46,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:32:46,851 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:32:46,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 20:32:46,851 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:32:46,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:32:46,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1198814192, now seen corresponding path program 1 times [2024-06-21 20:32:46,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:32:46,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208943956] [2024-06-21 20:32:46,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:32:46,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:32:46,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:32:47,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:32:47,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:32:47,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208943956] [2024-06-21 20:32:47,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208943956] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:32:47,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:32:47,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:32:47,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675664808] [2024-06-21 20:32:47,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:32:47,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:32:47,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:32:47,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:32:47,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:32:47,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:32:47,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 205 transitions, 1887 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 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) [2024-06-21 20:32:47,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:32:47,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:32:47,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:32:48,310 INFO L124 PetriNetUnfolderBase]: 2528/4052 cut-off events. [2024-06-21 20:32:48,310 INFO L125 PetriNetUnfolderBase]: For 290237/290243 co-relation queries the response was YES. [2024-06-21 20:32:48,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30819 conditions, 4052 events. 2528/4052 cut-off events. For 290237/290243 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 23169 event pairs, 639 based on Foata normal form. 7/4057 useless extension candidates. Maximal degree in co-relation 30730. Up to 3831 conditions per place. [2024-06-21 20:32:48,352 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 197 selfloop transitions, 24 changer transitions 0/226 dead transitions. [2024-06-21 20:32:48,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 226 transitions, 2445 flow [2024-06-21 20:32:48,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:32:48,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:32:48,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-21 20:32:48,376 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.445578231292517 [2024-06-21 20:32:48,376 INFO L175 Difference]: Start difference. First operand has 190 places, 205 transitions, 1887 flow. Second operand 7 states and 131 transitions. [2024-06-21 20:32:48,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 226 transitions, 2445 flow [2024-06-21 20:32:48,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 226 transitions, 2351 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-21 20:32:48,648 INFO L231 Difference]: Finished difference. Result has 189 places, 208 transitions, 1913 flow [2024-06-21 20:32:48,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1793, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1913, PETRI_PLACES=189, PETRI_TRANSITIONS=208} [2024-06-21 20:32:48,649 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 146 predicate places. [2024-06-21 20:32:48,649 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 208 transitions, 1913 flow [2024-06-21 20:32:48,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 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) [2024-06-21 20:32:48,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:32:48,650 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:32:48,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-21 20:32:48,650 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:32:48,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:32:48,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1205480432, now seen corresponding path program 2 times [2024-06-21 20:32:48,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:32:48,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872588996] [2024-06-21 20:32:48,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:32:48,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:32:48,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:32:49,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:32:49,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:32:49,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872588996] [2024-06-21 20:32:49,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872588996] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:32:49,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:32:49,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:32:49,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511886860] [2024-06-21 20:32:49,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:32:49,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:32:49,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:32:49,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:32:49,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:32:49,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:32:49,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 208 transitions, 1913 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:32:49,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:32:49,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:32:49,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:32:50,261 INFO L124 PetriNetUnfolderBase]: 2541/4070 cut-off events. [2024-06-21 20:32:50,261 INFO L125 PetriNetUnfolderBase]: For 302261/302267 co-relation queries the response was YES. [2024-06-21 20:32:50,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31484 conditions, 4070 events. 2541/4070 cut-off events. For 302261/302267 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 23270 event pairs, 639 based on Foata normal form. 7/4075 useless extension candidates. Maximal degree in co-relation 31395. Up to 3837 conditions per place. [2024-06-21 20:32:50,304 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 197 selfloop transitions, 30 changer transitions 0/232 dead transitions. [2024-06-21 20:32:50,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 232 transitions, 2670 flow [2024-06-21 20:32:50,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:32:50,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:32:50,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-21 20:32:50,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4421768707482993 [2024-06-21 20:32:50,306 INFO L175 Difference]: Start difference. First operand has 189 places, 208 transitions, 1913 flow. Second operand 7 states and 130 transitions. [2024-06-21 20:32:50,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 232 transitions, 2670 flow [2024-06-21 20:32:50,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 232 transitions, 2572 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-21 20:32:50,626 INFO L231 Difference]: Finished difference. Result has 192 places, 216 transitions, 2046 flow [2024-06-21 20:32:50,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1815, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2046, PETRI_PLACES=192, PETRI_TRANSITIONS=216} [2024-06-21 20:32:50,626 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 149 predicate places. [2024-06-21 20:32:50,626 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 216 transitions, 2046 flow [2024-06-21 20:32:50,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:32:50,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:32:50,627 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:32:50,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-21 20:32:50,627 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:32:50,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:32:50,629 INFO L85 PathProgramCache]: Analyzing trace with hash -1373406101, now seen corresponding path program 1 times [2024-06-21 20:32:50,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:32:50,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492220374] [2024-06-21 20:32:50,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:32:50,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:32:50,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:32:51,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:32:51,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:32:51,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492220374] [2024-06-21 20:32:51,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492220374] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:32:51,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:32:51,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:32:51,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443793133] [2024-06-21 20:32:51,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:32:51,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:32:51,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:32:51,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:32:51,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:32:51,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:32:51,966 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 216 transitions, 2046 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:32:51,966 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:32:51,967 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:32:51,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:32:53,110 INFO L124 PetriNetUnfolderBase]: 2705/4392 cut-off events. [2024-06-21 20:32:53,111 INFO L125 PetriNetUnfolderBase]: For 333163/333165 co-relation queries the response was YES. [2024-06-21 20:32:53,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33527 conditions, 4392 events. 2705/4392 cut-off events. For 333163/333165 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 26008 event pairs, 644 based on Foata normal form. 12/4402 useless extension candidates. Maximal degree in co-relation 33436. Up to 3487 conditions per place. [2024-06-21 20:32:53,231 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 180 selfloop transitions, 82 changer transitions 0/267 dead transitions. [2024-06-21 20:32:53,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 267 transitions, 2900 flow [2024-06-21 20:32:53,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:32:53,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:32:53,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 198 transitions. [2024-06-21 20:32:53,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4714285714285714 [2024-06-21 20:32:53,233 INFO L175 Difference]: Start difference. First operand has 192 places, 216 transitions, 2046 flow. Second operand 10 states and 198 transitions. [2024-06-21 20:32:53,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 267 transitions, 2900 flow [2024-06-21 20:32:53,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 267 transitions, 2807 flow, removed 35 selfloop flow, removed 3 redundant places. [2024-06-21 20:32:53,520 INFO L231 Difference]: Finished difference. Result has 201 places, 227 transitions, 2318 flow [2024-06-21 20:32:53,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1953, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2318, PETRI_PLACES=201, PETRI_TRANSITIONS=227} [2024-06-21 20:32:53,521 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 158 predicate places. [2024-06-21 20:32:53,521 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 227 transitions, 2318 flow [2024-06-21 20:32:53,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:32:53,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:32:53,521 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:32:53,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-21 20:32:53,522 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:32:53,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:32:53,522 INFO L85 PathProgramCache]: Analyzing trace with hash 1205489360, now seen corresponding path program 1 times [2024-06-21 20:32:53,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:32:53,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466593262] [2024-06-21 20:32:53,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:32:53,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:32:53,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:32:54,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:32:54,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:32:54,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466593262] [2024-06-21 20:32:54,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466593262] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:32:54,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:32:54,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:32:54,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259414491] [2024-06-21 20:32:54,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:32:54,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:32:54,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:32:54,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:32:54,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:32:54,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 20:32:54,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 227 transitions, 2318 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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) [2024-06-21 20:32:54,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:32:54,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 20:32:54,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:32:55,561 INFO L124 PetriNetUnfolderBase]: 2444/4088 cut-off events. [2024-06-21 20:32:55,561 INFO L125 PetriNetUnfolderBase]: For 338345/338377 co-relation queries the response was YES. [2024-06-21 20:32:55,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32608 conditions, 4088 events. 2444/4088 cut-off events. For 338345/338377 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 25246 event pairs, 624 based on Foata normal form. 12/4042 useless extension candidates. Maximal degree in co-relation 32513. Up to 3579 conditions per place. [2024-06-21 20:32:55,607 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 170 selfloop transitions, 30 changer transitions 0/246 dead transitions. [2024-06-21 20:32:55,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 246 transitions, 2814 flow [2024-06-21 20:32:55,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:32:55,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:32:55,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-21 20:32:55,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46130952380952384 [2024-06-21 20:32:55,608 INFO L175 Difference]: Start difference. First operand has 201 places, 227 transitions, 2318 flow. Second operand 8 states and 155 transitions. [2024-06-21 20:32:55,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 246 transitions, 2814 flow [2024-06-21 20:32:55,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 246 transitions, 2636 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-21 20:32:55,966 INFO L231 Difference]: Finished difference. Result has 204 places, 230 transitions, 2262 flow [2024-06-21 20:32:55,966 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2140, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2262, PETRI_PLACES=204, PETRI_TRANSITIONS=230} [2024-06-21 20:32:55,967 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 161 predicate places. [2024-06-21 20:32:55,967 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 230 transitions, 2262 flow [2024-06-21 20:32:55,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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) [2024-06-21 20:32:55,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:32:55,967 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:32:55,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-21 20:32:55,968 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:32:55,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:32:55,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1342704722, now seen corresponding path program 3 times [2024-06-21 20:32:55,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:32:55,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440142533] [2024-06-21 20:32:55,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:32:55,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:32:55,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:32:56,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:32:56,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:32:56,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440142533] [2024-06-21 20:32:56,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440142533] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:32:56,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:32:56,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:32:56,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973215495] [2024-06-21 20:32:56,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:32:56,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:32:56,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:32:56,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:32:56,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:32:56,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:32:56,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 230 transitions, 2262 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 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) [2024-06-21 20:32:56,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:32:56,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:32:56,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:32:57,525 INFO L124 PetriNetUnfolderBase]: 2722/4418 cut-off events. [2024-06-21 20:32:57,526 INFO L125 PetriNetUnfolderBase]: For 336249/336255 co-relation queries the response was YES. [2024-06-21 20:32:57,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34327 conditions, 4418 events. 2722/4418 cut-off events. For 336249/336255 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 26142 event pairs, 666 based on Foata normal form. 7/4422 useless extension candidates. Maximal degree in co-relation 34231. Up to 4157 conditions per place. [2024-06-21 20:32:57,566 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 219 selfloop transitions, 23 changer transitions 0/247 dead transitions. [2024-06-21 20:32:57,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 247 transitions, 2813 flow [2024-06-21 20:32:57,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:32:57,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:32:57,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-21 20:32:57,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43537414965986393 [2024-06-21 20:32:57,568 INFO L175 Difference]: Start difference. First operand has 204 places, 230 transitions, 2262 flow. Second operand 7 states and 128 transitions. [2024-06-21 20:32:57,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 247 transitions, 2813 flow [2024-06-21 20:32:57,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 247 transitions, 2663 flow, removed 47 selfloop flow, removed 6 redundant places. [2024-06-21 20:32:57,986 INFO L231 Difference]: Finished difference. Result has 205 places, 231 transitions, 2183 flow [2024-06-21 20:32:57,986 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2122, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2183, PETRI_PLACES=205, PETRI_TRANSITIONS=231} [2024-06-21 20:32:57,986 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 162 predicate places. [2024-06-21 20:32:57,987 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 231 transitions, 2183 flow [2024-06-21 20:32:57,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 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) [2024-06-21 20:32:57,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:32:57,987 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:32:57,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-21 20:32:57,987 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:32:57,987 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:32:57,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1992908596, now seen corresponding path program 4 times [2024-06-21 20:32:57,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:32:57,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255267615] [2024-06-21 20:32:57,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:32:57,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:32:57,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:32:58,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:32:58,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:32:58,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255267615] [2024-06-21 20:32:58,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255267615] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:32:58,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:32:58,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:32:58,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458903483] [2024-06-21 20:32:58,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:32:58,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:32:58,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:32:58,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:32:58,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:32:58,730 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:32:58,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 231 transitions, 2183 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:32:58,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:32:58,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:32:58,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:32:59,487 INFO L124 PetriNetUnfolderBase]: 2727/4436 cut-off events. [2024-06-21 20:32:59,487 INFO L125 PetriNetUnfolderBase]: For 346010/346016 co-relation queries the response was YES. [2024-06-21 20:32:59,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34403 conditions, 4436 events. 2727/4436 cut-off events. For 346010/346016 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 26386 event pairs, 666 based on Foata normal form. 7/4439 useless extension candidates. Maximal degree in co-relation 34306. Up to 4155 conditions per place. [2024-06-21 20:32:59,606 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 211 selfloop transitions, 31 changer transitions 0/247 dead transitions. [2024-06-21 20:32:59,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 247 transitions, 2779 flow [2024-06-21 20:32:59,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:32:59,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:32:59,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-21 20:32:59,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 20:32:59,607 INFO L175 Difference]: Start difference. First operand has 205 places, 231 transitions, 2183 flow. Second operand 7 states and 126 transitions. [2024-06-21 20:32:59,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 247 transitions, 2779 flow [2024-06-21 20:32:59,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 247 transitions, 2729 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-21 20:32:59,894 INFO L231 Difference]: Finished difference. Result has 207 places, 234 transitions, 2279 flow [2024-06-21 20:32:59,894 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2133, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2279, PETRI_PLACES=207, PETRI_TRANSITIONS=234} [2024-06-21 20:32:59,894 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 164 predicate places. [2024-06-21 20:32:59,895 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 234 transitions, 2279 flow [2024-06-21 20:32:59,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:32:59,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:32:59,895 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:32:59,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-21 20:32:59,895 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:32:59,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:32:59,896 INFO L85 PathProgramCache]: Analyzing trace with hash -821734610, now seen corresponding path program 5 times [2024-06-21 20:32:59,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:32:59,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233505145] [2024-06-21 20:32:59,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:32:59,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:32:59,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:33:00,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:33:00,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:33:00,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233505145] [2024-06-21 20:33:00,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233505145] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:33:00,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:33:00,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:33:00,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503114295] [2024-06-21 20:33:00,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:33:00,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:33:00,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:33:00,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:33:00,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:33:00,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:33:00,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 234 transitions, 2279 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:33:00,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:33:00,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:33:00,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:33:01,550 INFO L124 PetriNetUnfolderBase]: 2732/4435 cut-off events. [2024-06-21 20:33:01,550 INFO L125 PetriNetUnfolderBase]: For 357544/357552 co-relation queries the response was YES. [2024-06-21 20:33:01,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34935 conditions, 4435 events. 2732/4435 cut-off events. For 357544/357552 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 26281 event pairs, 670 based on Foata normal form. 9/4440 useless extension candidates. Maximal degree in co-relation 34837. Up to 4138 conditions per place. [2024-06-21 20:33:01,599 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 202 selfloop transitions, 46 changer transitions 0/253 dead transitions. [2024-06-21 20:33:01,599 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 253 transitions, 3096 flow [2024-06-21 20:33:01,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:33:01,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:33:01,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-21 20:33:01,600 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 20:33:01,600 INFO L175 Difference]: Start difference. First operand has 207 places, 234 transitions, 2279 flow. Second operand 7 states and 126 transitions. [2024-06-21 20:33:01,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 253 transitions, 3096 flow [2024-06-21 20:33:01,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 253 transitions, 2972 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-21 20:33:01,971 INFO L231 Difference]: Finished difference. Result has 210 places, 242 transitions, 2441 flow [2024-06-21 20:33:01,971 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2155, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2441, PETRI_PLACES=210, PETRI_TRANSITIONS=242} [2024-06-21 20:33:01,972 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 167 predicate places. [2024-06-21 20:33:01,972 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 242 transitions, 2441 flow [2024-06-21 20:33:01,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:33:01,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:33:01,972 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:33:01,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-21 20:33:01,972 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:33:01,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:33:01,973 INFO L85 PathProgramCache]: Analyzing trace with hash 1372770198, now seen corresponding path program 6 times [2024-06-21 20:33:01,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:33:01,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552179833] [2024-06-21 20:33:01,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:33:01,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:33:01,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:33:02,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:33:02,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:33:02,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552179833] [2024-06-21 20:33:02,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552179833] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:33:02,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:33:02,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:33:02,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026828077] [2024-06-21 20:33:02,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:33:02,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:33:02,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:33:02,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:33:02,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:33:02,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:33:02,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 242 transitions, 2441 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 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) [2024-06-21 20:33:02,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:33:02,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:33:02,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:33:03,703 INFO L124 PetriNetUnfolderBase]: 2729/4433 cut-off events. [2024-06-21 20:33:03,704 INFO L125 PetriNetUnfolderBase]: For 367907/367915 co-relation queries the response was YES. [2024-06-21 20:33:03,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35249 conditions, 4433 events. 2729/4433 cut-off events. For 367907/367915 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 26328 event pairs, 676 based on Foata normal form. 9/4438 useless extension candidates. Maximal degree in co-relation 35149. Up to 4135 conditions per place. [2024-06-21 20:33:03,752 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 201 selfloop transitions, 47 changer transitions 0/253 dead transitions. [2024-06-21 20:33:03,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 253 transitions, 2992 flow [2024-06-21 20:33:03,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:33:03,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:33:03,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-21 20:33:03,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42517006802721086 [2024-06-21 20:33:03,753 INFO L175 Difference]: Start difference. First operand has 210 places, 242 transitions, 2441 flow. Second operand 7 states and 125 transitions. [2024-06-21 20:33:03,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 253 transitions, 2992 flow [2024-06-21 20:33:04,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 253 transitions, 2768 flow, removed 80 selfloop flow, removed 4 redundant places. [2024-06-21 20:33:04,214 INFO L231 Difference]: Finished difference. Result has 213 places, 243 transitions, 2342 flow [2024-06-21 20:33:04,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2235, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2342, PETRI_PLACES=213, PETRI_TRANSITIONS=243} [2024-06-21 20:33:04,214 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 170 predicate places. [2024-06-21 20:33:04,215 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 243 transitions, 2342 flow [2024-06-21 20:33:04,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 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) [2024-06-21 20:33:04,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:33:04,215 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:33:04,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-21 20:33:04,215 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)] === [2024-06-21 20:33:04,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:33:04,216 INFO L85 PathProgramCache]: Analyzing trace with hash -1702642969, now seen corresponding path program 2 times [2024-06-21 20:33:04,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:33:04,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501419854] [2024-06-21 20:33:04,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:33:04,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:33:04,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:33:05,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:33:05,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:33:05,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501419854] [2024-06-21 20:33:05,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501419854] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:33:05,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:33:05,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:33:05,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30518127] [2024-06-21 20:33:05,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:33:05,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:33:05,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:33:05,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:33:05,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:33:05,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:33:05,444 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 243 transitions, 2342 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:33:05,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:33:05,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:33:05,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:33:06,481 INFO L124 PetriNetUnfolderBase]: 2839/4637 cut-off events. [2024-06-21 20:33:06,481 INFO L125 PetriNetUnfolderBase]: For 395166/395166 co-relation queries the response was YES. [2024-06-21 20:33:06,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36268 conditions, 4637 events. 2839/4637 cut-off events. For 395166/395166 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 27995 event pairs, 672 based on Foata normal form. 12/4644 useless extension candidates. Maximal degree in co-relation 36167. Up to 3886 conditions per place. [2024-06-21 20:33:06,533 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 198 selfloop transitions, 84 changer transitions 0/287 dead transitions. [2024-06-21 20:33:06,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 287 transitions, 3181 flow [2024-06-21 20:33:06,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:33:06,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:33:06,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 195 transitions. [2024-06-21 20:33:06,534 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-21 20:33:06,534 INFO L175 Difference]: Start difference. First operand has 213 places, 243 transitions, 2342 flow. Second operand 10 states and 195 transitions. [2024-06-21 20:33:06,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 287 transitions, 3181 flow [2024-06-21 20:33:07,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 287 transitions, 3108 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-21 20:33:07,117 INFO L231 Difference]: Finished difference. Result has 221 places, 249 transitions, 2572 flow [2024-06-21 20:33:07,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2269, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2572, PETRI_PLACES=221, PETRI_TRANSITIONS=249} [2024-06-21 20:33:07,118 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 178 predicate places. [2024-06-21 20:33:07,118 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 249 transitions, 2572 flow [2024-06-21 20:33:07,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:33:07,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:33:07,118 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:33:07,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-21 20:33:07,119 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)] === [2024-06-21 20:33:07,119 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:33:07,119 INFO L85 PathProgramCache]: Analyzing trace with hash -1323987935, now seen corresponding path program 3 times [2024-06-21 20:33:07,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:33:07,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678146944] [2024-06-21 20:33:07,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:33:07,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:33:07,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:33:08,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:33:08,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:33:08,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678146944] [2024-06-21 20:33:08,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678146944] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:33:08,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:33:08,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:33:08,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26366234] [2024-06-21 20:33:08,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:33:08,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:33:08,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:33:08,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:33:08,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:33:08,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:33:08,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 249 transitions, 2572 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:33:08,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:33:08,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:33:08,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:33:09,474 INFO L124 PetriNetUnfolderBase]: 2921/4789 cut-off events. [2024-06-21 20:33:09,474 INFO L125 PetriNetUnfolderBase]: For 415081/415081 co-relation queries the response was YES. [2024-06-21 20:33:09,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37993 conditions, 4789 events. 2921/4789 cut-off events. For 415081/415081 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 29303 event pairs, 697 based on Foata normal form. 12/4796 useless extension candidates. Maximal degree in co-relation 37889. Up to 4028 conditions per place. [2024-06-21 20:33:09,522 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 196 selfloop transitions, 94 changer transitions 0/295 dead transitions. [2024-06-21 20:33:09,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 295 transitions, 3454 flow [2024-06-21 20:33:09,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:33:09,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:33:09,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 194 transitions. [2024-06-21 20:33:09,523 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46190476190476193 [2024-06-21 20:33:09,523 INFO L175 Difference]: Start difference. First operand has 221 places, 249 transitions, 2572 flow. Second operand 10 states and 194 transitions. [2024-06-21 20:33:09,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 295 transitions, 3454 flow [2024-06-21 20:33:09,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 295 transitions, 3243 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-21 20:33:09,953 INFO L231 Difference]: Finished difference. Result has 228 places, 258 transitions, 2741 flow [2024-06-21 20:33:09,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2373, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2741, PETRI_PLACES=228, PETRI_TRANSITIONS=258} [2024-06-21 20:33:09,954 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 185 predicate places. [2024-06-21 20:33:09,954 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 258 transitions, 2741 flow [2024-06-21 20:33:09,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:33:09,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:33:09,954 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:33:09,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-21 20:33:09,955 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:33:09,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:33:09,955 INFO L85 PathProgramCache]: Analyzing trace with hash 512146539, now seen corresponding path program 4 times [2024-06-21 20:33:09,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:33:09,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584635700] [2024-06-21 20:33:09,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:33:09,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:33:09,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:33:11,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:33:11,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:33:11,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584635700] [2024-06-21 20:33:11,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584635700] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:33:11,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:33:11,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:33:11,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393523528] [2024-06-21 20:33:11,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:33:11,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:33:11,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:33:11,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:33:11,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:33:11,249 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:33:11,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 258 transitions, 2741 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:33:11,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:33:11,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:33:11,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:33:12,477 INFO L124 PetriNetUnfolderBase]: 3044/5032 cut-off events. [2024-06-21 20:33:12,478 INFO L125 PetriNetUnfolderBase]: For 432704/432704 co-relation queries the response was YES. [2024-06-21 20:33:12,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39431 conditions, 5032 events. 3044/5032 cut-off events. For 432704/432704 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 31323 event pairs, 683 based on Foata normal form. 12/5039 useless extension candidates. Maximal degree in co-relation 39324. Up to 3292 conditions per place. [2024-06-21 20:33:12,539 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 183 selfloop transitions, 113 changer transitions 0/301 dead transitions. [2024-06-21 20:33:12,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 301 transitions, 3738 flow [2024-06-21 20:33:12,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:33:12,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:33:12,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 208 transitions. [2024-06-21 20:33:12,540 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45021645021645024 [2024-06-21 20:33:12,540 INFO L175 Difference]: Start difference. First operand has 228 places, 258 transitions, 2741 flow. Second operand 11 states and 208 transitions. [2024-06-21 20:33:12,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 301 transitions, 3738 flow [2024-06-21 20:33:13,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 301 transitions, 3568 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-21 20:33:13,086 INFO L231 Difference]: Finished difference. Result has 236 places, 262 transitions, 2956 flow [2024-06-21 20:33:13,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2573, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2956, PETRI_PLACES=236, PETRI_TRANSITIONS=262} [2024-06-21 20:33:13,087 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 193 predicate places. [2024-06-21 20:33:13,087 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 262 transitions, 2956 flow [2024-06-21 20:33:13,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:33:13,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:33:13,087 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:33:13,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-21 20:33:13,088 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:33:13,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:33:13,088 INFO L85 PathProgramCache]: Analyzing trace with hash 885673067, now seen corresponding path program 5 times [2024-06-21 20:33:13,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:33:13,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314289778] [2024-06-21 20:33:13,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:33:13,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:33:13,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:33:14,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:33:14,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:33:14,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314289778] [2024-06-21 20:33:14,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314289778] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:33:14,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:33:14,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:33:14,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214263446] [2024-06-21 20:33:14,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:33:14,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:33:14,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:33:14,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:33:14,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:33:14,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:33:14,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 262 transitions, 2956 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:33:14,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:33:14,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:33:14,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:33:15,469 INFO L124 PetriNetUnfolderBase]: 3024/5000 cut-off events. [2024-06-21 20:33:15,470 INFO L125 PetriNetUnfolderBase]: For 418751/418751 co-relation queries the response was YES. [2024-06-21 20:33:15,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38293 conditions, 5000 events. 3024/5000 cut-off events. For 418751/418751 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 31199 event pairs, 692 based on Foata normal form. 12/5007 useless extension candidates. Maximal degree in co-relation 38184. Up to 4117 conditions per place. [2024-06-21 20:33:15,522 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 205 selfloop transitions, 88 changer transitions 0/298 dead transitions. [2024-06-21 20:33:15,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 298 transitions, 3612 flow [2024-06-21 20:33:15,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:33:15,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:33:15,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 195 transitions. [2024-06-21 20:33:15,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-21 20:33:15,525 INFO L175 Difference]: Start difference. First operand has 236 places, 262 transitions, 2956 flow. Second operand 10 states and 195 transitions. [2024-06-21 20:33:15,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 298 transitions, 3612 flow [2024-06-21 20:33:16,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 298 transitions, 3375 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-21 20:33:16,153 INFO L231 Difference]: Finished difference. Result has 239 places, 261 transitions, 2811 flow [2024-06-21 20:33:16,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2631, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2811, PETRI_PLACES=239, PETRI_TRANSITIONS=261} [2024-06-21 20:33:16,154 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 196 predicate places. [2024-06-21 20:33:16,154 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 261 transitions, 2811 flow [2024-06-21 20:33:16,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:33:16,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:33:16,154 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:33:16,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-21 20:33:16,154 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:33:16,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:33:16,155 INFO L85 PathProgramCache]: Analyzing trace with hash -821725682, now seen corresponding path program 2 times [2024-06-21 20:33:16,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:33:16,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598955535] [2024-06-21 20:33:16,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:33:16,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:33:16,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:33:17,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:33:17,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:33:17,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598955535] [2024-06-21 20:33:17,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598955535] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:33:17,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:33:17,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:33:17,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448229812] [2024-06-21 20:33:17,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:33:17,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:33:17,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:33:17,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:33:17,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:33:17,348 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 20:33:17,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 261 transitions, 2811 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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) [2024-06-21 20:33:17,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:33:17,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 20:33:17,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:33:18,147 INFO L124 PetriNetUnfolderBase]: 2739/4635 cut-off events. [2024-06-21 20:33:18,147 INFO L125 PetriNetUnfolderBase]: For 408852/408888 co-relation queries the response was YES. [2024-06-21 20:33:18,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35699 conditions, 4635 events. 2739/4635 cut-off events. For 408852/408888 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 29828 event pairs, 690 based on Foata normal form. 10/4564 useless extension candidates. Maximal degree in co-relation 35588. Up to 4072 conditions per place. [2024-06-21 20:33:18,200 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 184 selfloop transitions, 37 changer transitions 0/275 dead transitions. [2024-06-21 20:33:18,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 275 transitions, 3339 flow [2024-06-21 20:33:18,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:33:18,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:33:18,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-21 20:33:18,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-21 20:33:18,201 INFO L175 Difference]: Start difference. First operand has 239 places, 261 transitions, 2811 flow. Second operand 8 states and 150 transitions. [2024-06-21 20:33:18,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 275 transitions, 3339 flow [2024-06-21 20:33:18,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 275 transitions, 3028 flow, removed 21 selfloop flow, removed 11 redundant places. [2024-06-21 20:33:18,625 INFO L231 Difference]: Finished difference. Result has 236 places, 264 transitions, 2642 flow [2024-06-21 20:33:18,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2500, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2642, PETRI_PLACES=236, PETRI_TRANSITIONS=264} [2024-06-21 20:33:18,626 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 193 predicate places. [2024-06-21 20:33:18,626 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 264 transitions, 2642 flow [2024-06-21 20:33:18,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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) [2024-06-21 20:33:18,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:33:18,626 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:33:18,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-21 20:33:18,627 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:33:18,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:33:18,627 INFO L85 PathProgramCache]: Analyzing trace with hash 231730802, now seen corresponding path program 3 times [2024-06-21 20:33:18,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:33:18,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213141884] [2024-06-21 20:33:18,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:33:18,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:33:18,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:33:19,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:33:19,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:33:19,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213141884] [2024-06-21 20:33:19,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213141884] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:33:19,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:33:19,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:33:19,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859974143] [2024-06-21 20:33:19,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:33:19,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:33:19,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:33:19,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:33:19,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:33:19,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 20:33:19,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 264 transitions, 2642 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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) [2024-06-21 20:33:19,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:33:19,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 20:33:19,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:33:20,632 INFO L124 PetriNetUnfolderBase]: 2753/4659 cut-off events. [2024-06-21 20:33:20,632 INFO L125 PetriNetUnfolderBase]: For 415244/415280 co-relation queries the response was YES. [2024-06-21 20:33:20,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35597 conditions, 4659 events. 2753/4659 cut-off events. For 415244/415280 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 30027 event pairs, 689 based on Foata normal form. 12/4592 useless extension candidates. Maximal degree in co-relation 35489. Up to 4040 conditions per place. [2024-06-21 20:33:20,680 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 174 selfloop transitions, 56 changer transitions 0/284 dead transitions. [2024-06-21 20:33:20,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 284 transitions, 3402 flow [2024-06-21 20:33:20,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:33:20,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:33:20,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-21 20:33:20,682 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-21 20:33:20,682 INFO L175 Difference]: Start difference. First operand has 236 places, 264 transitions, 2642 flow. Second operand 8 states and 156 transitions. [2024-06-21 20:33:20,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 284 transitions, 3402 flow [2024-06-21 20:33:21,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 284 transitions, 3284 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-21 20:33:21,157 INFO L231 Difference]: Finished difference. Result has 238 places, 270 transitions, 2772 flow [2024-06-21 20:33:21,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2524, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2772, PETRI_PLACES=238, PETRI_TRANSITIONS=270} [2024-06-21 20:33:21,157 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 195 predicate places. [2024-06-21 20:33:21,157 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 270 transitions, 2772 flow [2024-06-21 20:33:21,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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) [2024-06-21 20:33:21,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:33:21,158 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:33:21,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-21 20:33:21,158 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:33:21,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:33:21,158 INFO L85 PathProgramCache]: Analyzing trace with hash 232206032, now seen corresponding path program 4 times [2024-06-21 20:33:21,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:33:21,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730911788] [2024-06-21 20:33:21,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:33:21,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:33:21,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:33:22,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:33:22,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:33:22,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730911788] [2024-06-21 20:33:22,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730911788] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:33:22,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:33:22,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:33:22,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448721192] [2024-06-21 20:33:22,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:33:22,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:33:22,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:33:22,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:33:22,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:33:22,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 20:33:22,304 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 270 transitions, 2772 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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) [2024-06-21 20:33:22,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:33:22,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 20:33:22,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:33:23,303 INFO L124 PetriNetUnfolderBase]: 2738/4649 cut-off events. [2024-06-21 20:33:23,303 INFO L125 PetriNetUnfolderBase]: For 419164/419180 co-relation queries the response was YES. [2024-06-21 20:33:23,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35645 conditions, 4649 events. 2738/4649 cut-off events. For 419164/419180 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 30000 event pairs, 685 based on Foata normal form. 14/4595 useless extension candidates. Maximal degree in co-relation 35536. Up to 4119 conditions per place. [2024-06-21 20:33:23,352 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 207 selfloop transitions, 20 changer transitions 0/281 dead transitions. [2024-06-21 20:33:23,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 281 transitions, 3256 flow [2024-06-21 20:33:23,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:33:23,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:33:23,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-21 20:33:23,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2024-06-21 20:33:23,360 INFO L175 Difference]: Start difference. First operand has 238 places, 270 transitions, 2772 flow. Second operand 8 states and 149 transitions. [2024-06-21 20:33:23,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 281 transitions, 3256 flow [2024-06-21 20:33:23,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 281 transitions, 3093 flow, removed 52 selfloop flow, removed 4 redundant places. [2024-06-21 20:33:23,990 INFO L231 Difference]: Finished difference. Result has 242 places, 270 transitions, 2656 flow [2024-06-21 20:33:23,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2609, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2656, PETRI_PLACES=242, PETRI_TRANSITIONS=270} [2024-06-21 20:33:23,993 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 199 predicate places. [2024-06-21 20:33:23,993 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 270 transitions, 2656 flow [2024-06-21 20:33:23,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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) [2024-06-21 20:33:23,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:33:23,993 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:33:23,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-21 20:33:23,993 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:33:23,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:33:23,994 INFO L85 PathProgramCache]: Analyzing trace with hash -1997546940, now seen corresponding path program 1 times [2024-06-21 20:33:23,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:33:23,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461573780] [2024-06-21 20:33:23,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:33:23,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:33:24,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:33:25,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:33:25,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:33:25,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461573780] [2024-06-21 20:33:25,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461573780] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:33:25,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:33:25,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:33:25,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449752599] [2024-06-21 20:33:25,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:33:25,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:33:25,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:33:25,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:33:25,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:33:25,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 20:33:25,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 270 transitions, 2656 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-21 20:33:25,115 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:33:25,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 20:33:25,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:33:26,249 INFO L124 PetriNetUnfolderBase]: 2932/4922 cut-off events. [2024-06-21 20:33:26,249 INFO L125 PetriNetUnfolderBase]: For 424518/424518 co-relation queries the response was YES. [2024-06-21 20:33:26,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37084 conditions, 4922 events. 2932/4922 cut-off events. For 424518/424518 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 31312 event pairs, 705 based on Foata normal form. 1/4917 useless extension candidates. Maximal degree in co-relation 36973. Up to 4521 conditions per place. [2024-06-21 20:33:26,297 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 264 selfloop transitions, 18 changer transitions 0/292 dead transitions. [2024-06-21 20:33:26,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 292 transitions, 3346 flow [2024-06-21 20:33:26,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:33:26,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:33:26,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-21 20:33:26,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2024-06-21 20:33:26,299 INFO L175 Difference]: Start difference. First operand has 242 places, 270 transitions, 2656 flow. Second operand 8 states and 149 transitions. [2024-06-21 20:33:26,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 292 transitions, 3346 flow [2024-06-21 20:33:26,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 292 transitions, 3298 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-21 20:33:26,855 INFO L231 Difference]: Finished difference. Result has 243 places, 273 transitions, 2726 flow [2024-06-21 20:33:26,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2608, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2726, PETRI_PLACES=243, PETRI_TRANSITIONS=273} [2024-06-21 20:33:26,856 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 200 predicate places. [2024-06-21 20:33:26,856 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 273 transitions, 2726 flow [2024-06-21 20:33:26,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-21 20:33:26,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:33:26,856 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:33:26,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-21 20:33:26,857 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:33:26,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:33:26,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1892296628, now seen corresponding path program 1 times [2024-06-21 20:33:26,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:33:26,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321203380] [2024-06-21 20:33:26,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:33:26,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:33:26,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:33:27,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:33:27,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:33:27,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321203380] [2024-06-21 20:33:27,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321203380] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:33:27,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:33:27,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:33:27,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272462782] [2024-06-21 20:33:27,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:33:27,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:33:27,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:33:27,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:33:27,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:33:27,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 20:33:27,816 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 273 transitions, 2726 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-21 20:33:27,816 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:33:27,816 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 20:33:27,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:33:28,889 INFO L124 PetriNetUnfolderBase]: 2942/4940 cut-off events. [2024-06-21 20:33:28,889 INFO L125 PetriNetUnfolderBase]: For 444987/444987 co-relation queries the response was YES. [2024-06-21 20:33:28,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37752 conditions, 4940 events. 2942/4940 cut-off events. For 444987/444987 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 31423 event pairs, 704 based on Foata normal form. 4/4938 useless extension candidates. Maximal degree in co-relation 37640. Up to 4535 conditions per place. [2024-06-21 20:33:28,938 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 265 selfloop transitions, 19 changer transitions 0/294 dead transitions. [2024-06-21 20:33:28,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 294 transitions, 3406 flow [2024-06-21 20:33:28,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:33:28,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:33:28,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-21 20:33:28,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-21 20:33:28,940 INFO L175 Difference]: Start difference. First operand has 243 places, 273 transitions, 2726 flow. Second operand 8 states and 148 transitions. [2024-06-21 20:33:28,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 294 transitions, 3406 flow [2024-06-21 20:33:29,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 294 transitions, 3310 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-21 20:33:29,582 INFO L231 Difference]: Finished difference. Result has 245 places, 277 transitions, 2743 flow [2024-06-21 20:33:29,582 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2630, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2743, PETRI_PLACES=245, PETRI_TRANSITIONS=277} [2024-06-21 20:33:29,583 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 202 predicate places. [2024-06-21 20:33:29,583 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 277 transitions, 2743 flow [2024-06-21 20:33:29,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-21 20:33:29,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:33:29,583 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:33:29,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-21 20:33:29,584 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:33:29,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:33:29,584 INFO L85 PathProgramCache]: Analyzing trace with hash -1887654998, now seen corresponding path program 2 times [2024-06-21 20:33:29,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:33:29,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116179280] [2024-06-21 20:33:29,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:33:29,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:33:29,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:33:30,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:33:30,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:33:30,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116179280] [2024-06-21 20:33:30,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116179280] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:33:30,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:33:30,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:33:30,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759592799] [2024-06-21 20:33:30,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:33:30,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:33:30,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:33:30,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:33:30,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:33:30,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 20:33:30,584 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 277 transitions, 2743 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-21 20:33:30,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:33:30,584 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 20:33:30,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:33:31,596 INFO L124 PetriNetUnfolderBase]: 2956/4962 cut-off events. [2024-06-21 20:33:31,597 INFO L125 PetriNetUnfolderBase]: For 459557/459557 co-relation queries the response was YES. [2024-06-21 20:33:31,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38705 conditions, 4962 events. 2956/4962 cut-off events. For 459557/459557 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 31625 event pairs, 704 based on Foata normal form. 4/4959 useless extension candidates. Maximal degree in co-relation 38592. Up to 4546 conditions per place. [2024-06-21 20:33:31,647 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 262 selfloop transitions, 24 changer transitions 0/296 dead transitions. [2024-06-21 20:33:31,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 296 transitions, 3435 flow [2024-06-21 20:33:31,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:33:31,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:33:31,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-21 20:33:31,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-21 20:33:31,648 INFO L175 Difference]: Start difference. First operand has 245 places, 277 transitions, 2743 flow. Second operand 8 states and 148 transitions. [2024-06-21 20:33:31,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 296 transitions, 3435 flow [2024-06-21 20:33:32,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 296 transitions, 3350 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-21 20:33:32,203 INFO L231 Difference]: Finished difference. Result has 247 places, 281 transitions, 2789 flow [2024-06-21 20:33:32,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2658, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2789, PETRI_PLACES=247, PETRI_TRANSITIONS=281} [2024-06-21 20:33:32,204 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 204 predicate places. [2024-06-21 20:33:32,204 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 281 transitions, 2789 flow [2024-06-21 20:33:32,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-21 20:33:32,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:33:32,204 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:33:32,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-21 20:33:32,204 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:33:32,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:33:32,205 INFO L85 PathProgramCache]: Analyzing trace with hash -1887648488, now seen corresponding path program 3 times [2024-06-21 20:33:32,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:33:32,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631295823] [2024-06-21 20:33:32,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:33:32,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:33:32,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:33:33,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:33:33,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:33:33,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631295823] [2024-06-21 20:33:33,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631295823] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:33:33,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:33:33,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:33:33,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489288462] [2024-06-21 20:33:33,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:33:33,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:33:33,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:33:33,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:33:33,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:33:33,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 20:33:33,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 281 transitions, 2789 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-21 20:33:33,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:33:33,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 20:33:33,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:33:34,382 INFO L124 PetriNetUnfolderBase]: 2978/4994 cut-off events. [2024-06-21 20:33:34,382 INFO L125 PetriNetUnfolderBase]: For 473062/473062 co-relation queries the response was YES. [2024-06-21 20:33:34,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39809 conditions, 4994 events. 2978/4994 cut-off events. For 473062/473062 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 31789 event pairs, 704 based on Foata normal form. 2/4990 useless extension candidates. Maximal degree in co-relation 39695. Up to 4544 conditions per place. [2024-06-21 20:33:34,441 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 260 selfloop transitions, 35 changer transitions 0/305 dead transitions. [2024-06-21 20:33:34,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 305 transitions, 3731 flow [2024-06-21 20:33:34,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:33:34,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:33:34,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-21 20:33:34,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494047619047619 [2024-06-21 20:33:34,443 INFO L175 Difference]: Start difference. First operand has 247 places, 281 transitions, 2789 flow. Second operand 8 states and 151 transitions. [2024-06-21 20:33:34,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 305 transitions, 3731 flow [2024-06-21 20:33:35,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 305 transitions, 3628 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-21 20:33:35,156 INFO L231 Difference]: Finished difference. Result has 250 places, 288 transitions, 2930 flow [2024-06-21 20:33:35,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2686, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2930, PETRI_PLACES=250, PETRI_TRANSITIONS=288} [2024-06-21 20:33:35,156 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 207 predicate places. [2024-06-21 20:33:35,159 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 288 transitions, 2930 flow [2024-06-21 20:33:35,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-21 20:33:35,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:33:35,160 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:33:35,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-21 20:33:35,160 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:33:35,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:33:35,160 INFO L85 PathProgramCache]: Analyzing trace with hash 223634346, now seen corresponding path program 4 times [2024-06-21 20:33:35,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:33:35,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910750402] [2024-06-21 20:33:35,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:33:35,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:33:35,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:33:36,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:33:36,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:33:36,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910750402] [2024-06-21 20:33:36,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910750402] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:33:36,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:33:36,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:33:36,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033835631] [2024-06-21 20:33:36,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:33:36,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:33:36,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:33:36,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:33:36,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:33:36,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 20:33:36,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 288 transitions, 2930 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-21 20:33:36,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:33:36,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 20:33:36,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:33:37,335 INFO L124 PetriNetUnfolderBase]: 2992/5017 cut-off events. [2024-06-21 20:33:37,335 INFO L125 PetriNetUnfolderBase]: For 496366/496368 co-relation queries the response was YES. [2024-06-21 20:33:37,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41006 conditions, 5017 events. 2992/5017 cut-off events. For 496366/496368 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 31967 event pairs, 714 based on Foata normal form. 4/5014 useless extension candidates. Maximal degree in co-relation 40890. Up to 4584 conditions per place. [2024-06-21 20:33:37,399 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 263 selfloop transitions, 31 changer transitions 0/304 dead transitions. [2024-06-21 20:33:37,399 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 304 transitions, 3656 flow [2024-06-21 20:33:37,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:33:37,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:33:37,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-21 20:33:37,400 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-21 20:33:37,400 INFO L175 Difference]: Start difference. First operand has 250 places, 288 transitions, 2930 flow. Second operand 8 states and 147 transitions. [2024-06-21 20:33:37,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 304 transitions, 3656 flow [2024-06-21 20:33:38,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 304 transitions, 3579 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-21 20:33:38,354 INFO L231 Difference]: Finished difference. Result has 254 places, 292 transitions, 3014 flow [2024-06-21 20:33:38,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2853, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3014, PETRI_PLACES=254, PETRI_TRANSITIONS=292} [2024-06-21 20:33:38,354 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 211 predicate places. [2024-06-21 20:33:38,354 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 292 transitions, 3014 flow [2024-06-21 20:33:38,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-21 20:33:38,355 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:33:38,355 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:33:38,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-21 20:33:38,355 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:33:38,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:33:38,355 INFO L85 PathProgramCache]: Analyzing trace with hash -816006058, now seen corresponding path program 5 times [2024-06-21 20:33:38,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:33:38,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495444071] [2024-06-21 20:33:38,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:33:38,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:33:38,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:33:39,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:33:39,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:33:39,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495444071] [2024-06-21 20:33:39,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495444071] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:33:39,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:33:39,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:33:39,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440910139] [2024-06-21 20:33:39,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:33:39,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:33:39,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:33:39,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:33:39,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:33:39,544 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 20:33:39,544 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 292 transitions, 3014 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-21 20:33:39,544 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:33:39,544 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 20:33:39,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:33:40,473 INFO L124 PetriNetUnfolderBase]: 3017/5052 cut-off events. [2024-06-21 20:33:40,473 INFO L125 PetriNetUnfolderBase]: For 511782/511784 co-relation queries the response was YES. [2024-06-21 20:33:40,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42276 conditions, 5052 events. 3017/5052 cut-off events. For 511782/511784 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 32208 event pairs, 713 based on Foata normal form. 2/5048 useless extension candidates. Maximal degree in co-relation 42158. Up to 4597 conditions per place. [2024-06-21 20:33:40,536 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 265 selfloop transitions, 39 changer transitions 0/314 dead transitions. [2024-06-21 20:33:40,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 314 transitions, 4022 flow [2024-06-21 20:33:40,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:33:40,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:33:40,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-21 20:33:40,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-21 20:33:40,546 INFO L175 Difference]: Start difference. First operand has 254 places, 292 transitions, 3014 flow. Second operand 8 states and 152 transitions. [2024-06-21 20:33:40,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 314 transitions, 4022 flow [2024-06-21 20:33:41,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 314 transitions, 3889 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-21 20:33:41,388 INFO L231 Difference]: Finished difference. Result has 257 places, 299 transitions, 3157 flow [2024-06-21 20:33:41,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2881, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3157, PETRI_PLACES=257, PETRI_TRANSITIONS=299} [2024-06-21 20:33:41,389 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 214 predicate places. [2024-06-21 20:33:41,389 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 299 transitions, 3157 flow [2024-06-21 20:33:41,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-21 20:33:41,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:33:41,389 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:33:41,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-21 20:33:41,390 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:33:41,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:33:41,390 INFO L85 PathProgramCache]: Analyzing trace with hash 231915066, now seen corresponding path program 6 times [2024-06-21 20:33:41,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:33:41,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086158792] [2024-06-21 20:33:41,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:33:41,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:33:41,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:33:42,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:33:42,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:33:42,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086158792] [2024-06-21 20:33:42,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086158792] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:33:42,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:33:42,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:33:42,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499333738] [2024-06-21 20:33:42,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:33:42,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:33:42,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:33:42,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:33:42,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:33:42,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 20:33:42,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 299 transitions, 3157 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-21 20:33:42,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:33:42,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 20:33:42,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:33:43,541 INFO L124 PetriNetUnfolderBase]: 3008/5040 cut-off events. [2024-06-21 20:33:43,541 INFO L125 PetriNetUnfolderBase]: For 524124/524126 co-relation queries the response was YES. [2024-06-21 20:33:43,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42822 conditions, 5040 events. 3008/5040 cut-off events. For 524124/524126 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 32131 event pairs, 714 based on Foata normal form. 3/5037 useless extension candidates. Maximal degree in co-relation 42702. Up to 4520 conditions per place. [2024-06-21 20:33:43,605 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 242 selfloop transitions, 65 changer transitions 0/317 dead transitions. [2024-06-21 20:33:43,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 317 transitions, 4081 flow [2024-06-21 20:33:43,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:33:43,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:33:43,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-21 20:33:43,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-21 20:33:43,607 INFO L175 Difference]: Start difference. First operand has 257 places, 299 transitions, 3157 flow. Second operand 8 states and 152 transitions. [2024-06-21 20:33:43,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 317 transitions, 4081 flow [2024-06-21 20:33:44,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 317 transitions, 3980 flow, removed 35 selfloop flow, removed 4 redundant places. [2024-06-21 20:33:44,497 INFO L231 Difference]: Finished difference. Result has 261 places, 302 transitions, 3278 flow [2024-06-21 20:33:44,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3056, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3278, PETRI_PLACES=261, PETRI_TRANSITIONS=302} [2024-06-21 20:33:44,501 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 218 predicate places. [2024-06-21 20:33:44,501 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 302 transitions, 3278 flow [2024-06-21 20:33:44,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-21 20:33:44,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:33:44,501 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:33:44,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-21 20:33:44,501 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:33:44,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:33:44,502 INFO L85 PathProgramCache]: Analyzing trace with hash -807424018, now seen corresponding path program 1 times [2024-06-21 20:33:44,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:33:44,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024532445] [2024-06-21 20:33:44,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:33:44,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:33:44,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:33:45,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:33:45,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:33:45,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024532445] [2024-06-21 20:33:45,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024532445] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:33:45,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:33:45,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:33:45,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254921830] [2024-06-21 20:33:45,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:33:45,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:33:45,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:33:45,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:33:45,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:33:45,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 20:33:45,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 302 transitions, 3278 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:33:45,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:33:45,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 20:33:45,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:33:46,880 INFO L124 PetriNetUnfolderBase]: 2832/4769 cut-off events. [2024-06-21 20:33:46,880 INFO L125 PetriNetUnfolderBase]: For 531336/531373 co-relation queries the response was YES. [2024-06-21 20:33:46,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41864 conditions, 4769 events. 2832/4769 cut-off events. For 531336/531373 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 30564 event pairs, 681 based on Foata normal form. 35/4722 useless extension candidates. Maximal degree in co-relation 41742. Up to 4247 conditions per place. [2024-06-21 20:33:46,941 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 242 selfloop transitions, 19 changer transitions 0/315 dead transitions. [2024-06-21 20:33:46,942 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 315 transitions, 3900 flow [2024-06-21 20:33:46,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:33:46,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:33:46,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-21 20:33:46,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-21 20:33:46,943 INFO L175 Difference]: Start difference. First operand has 261 places, 302 transitions, 3278 flow. Second operand 8 states and 148 transitions. [2024-06-21 20:33:46,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 315 transitions, 3900 flow [2024-06-21 20:33:47,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 315 transitions, 3714 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-21 20:33:47,849 INFO L231 Difference]: Finished difference. Result has 263 places, 304 transitions, 3211 flow [2024-06-21 20:33:47,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3092, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3211, PETRI_PLACES=263, PETRI_TRANSITIONS=304} [2024-06-21 20:33:47,850 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 220 predicate places. [2024-06-21 20:33:47,850 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 304 transitions, 3211 flow [2024-06-21 20:33:47,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:33:47,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:33:47,850 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:33:47,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-21 20:33:47,850 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:33:47,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:33:47,851 INFO L85 PathProgramCache]: Analyzing trace with hash -1292318476, now seen corresponding path program 1 times [2024-06-21 20:33:47,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:33:47,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111660214] [2024-06-21 20:33:47,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:33:47,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:33:47,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:33:48,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:33:48,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:33:48,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111660214] [2024-06-21 20:33:48,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111660214] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:33:48,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:33:48,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:33:48,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245045663] [2024-06-21 20:33:48,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:33:48,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:33:48,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:33:48,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:33:48,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:33:48,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:33:48,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 304 transitions, 3211 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:33:48,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:33:48,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:33:48,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:33:49,973 INFO L124 PetriNetUnfolderBase]: 3201/5257 cut-off events. [2024-06-21 20:33:49,974 INFO L125 PetriNetUnfolderBase]: For 539356/539356 co-relation queries the response was YES. [2024-06-21 20:33:50,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44790 conditions, 5257 events. 3201/5257 cut-off events. For 539356/539356 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 32660 event pairs, 745 based on Foata normal form. 1/5254 useless extension candidates. Maximal degree in co-relation 44667. Up to 4898 conditions per place. [2024-06-21 20:33:50,039 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 296 selfloop transitions, 41 changer transitions 0/342 dead transitions. [2024-06-21 20:33:50,039 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 342 transitions, 4204 flow [2024-06-21 20:33:50,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:33:50,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:33:50,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-21 20:33:50,040 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-21 20:33:50,040 INFO L175 Difference]: Start difference. First operand has 263 places, 304 transitions, 3211 flow. Second operand 9 states and 159 transitions. [2024-06-21 20:33:50,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 342 transitions, 4204 flow [2024-06-21 20:33:51,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 342 transitions, 4101 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-21 20:33:51,009 INFO L231 Difference]: Finished difference. Result has 268 places, 322 transitions, 3490 flow [2024-06-21 20:33:51,010 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3108, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3490, PETRI_PLACES=268, PETRI_TRANSITIONS=322} [2024-06-21 20:33:51,010 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 225 predicate places. [2024-06-21 20:33:51,010 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 322 transitions, 3490 flow [2024-06-21 20:33:51,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:33:51,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:33:51,010 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:33:51,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-21 20:33:51,011 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:33:51,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:33:51,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1600418176, now seen corresponding path program 2 times [2024-06-21 20:33:51,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:33:51,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036269882] [2024-06-21 20:33:51,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:33:51,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:33:51,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:33:51,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:33:51,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:33:51,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036269882] [2024-06-21 20:33:51,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036269882] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:33:51,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:33:51,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:33:51,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711569794] [2024-06-21 20:33:51,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:33:51,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:33:51,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:33:51,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:33:51,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:33:52,023 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:33:52,023 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 322 transitions, 3490 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:33:52,023 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:33:52,023 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:33:52,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:33:53,273 INFO L124 PetriNetUnfolderBase]: 3219/5286 cut-off events. [2024-06-21 20:33:53,274 INFO L125 PetriNetUnfolderBase]: For 555447/555451 co-relation queries the response was YES. [2024-06-21 20:33:53,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45696 conditions, 5286 events. 3219/5286 cut-off events. For 555447/555451 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 32866 event pairs, 736 based on Foata normal form. 5/5289 useless extension candidates. Maximal degree in co-relation 45570. Up to 4885 conditions per place. [2024-06-21 20:33:53,330 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 296 selfloop transitions, 56 changer transitions 0/357 dead transitions. [2024-06-21 20:33:53,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 357 transitions, 4628 flow [2024-06-21 20:33:53,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:33:53,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:33:53,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-21 20:33:53,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-21 20:33:53,332 INFO L175 Difference]: Start difference. First operand has 268 places, 322 transitions, 3490 flow. Second operand 9 states and 164 transitions. [2024-06-21 20:33:53,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 357 transitions, 4628 flow [2024-06-21 20:33:54,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 357 transitions, 4490 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-21 20:33:54,024 INFO L231 Difference]: Finished difference. Result has 274 places, 331 transitions, 3698 flow [2024-06-21 20:33:54,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3352, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3698, PETRI_PLACES=274, PETRI_TRANSITIONS=331} [2024-06-21 20:33:54,025 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 231 predicate places. [2024-06-21 20:33:54,025 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 331 transitions, 3698 flow [2024-06-21 20:33:54,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:33:54,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:33:54,026 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:33:54,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-21 20:33:54,026 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:33:54,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:33:54,026 INFO L85 PathProgramCache]: Analyzing trace with hash -801542144, now seen corresponding path program 3 times [2024-06-21 20:33:54,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:33:54,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882360510] [2024-06-21 20:33:54,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:33:54,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:33:54,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:33:54,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:33:54,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:33:54,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882360510] [2024-06-21 20:33:54,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882360510] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:33:54,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:33:54,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:33:54,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752110851] [2024-06-21 20:33:54,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:33:54,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:33:54,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:33:54,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:33:54,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:33:54,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:33:54,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 331 transitions, 3698 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:33:54,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:33:54,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:33:54,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:33:56,146 INFO L124 PetriNetUnfolderBase]: 3224/5292 cut-off events. [2024-06-21 20:33:56,146 INFO L125 PetriNetUnfolderBase]: For 574514/574516 co-relation queries the response was YES. [2024-06-21 20:33:56,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46359 conditions, 5292 events. 3224/5292 cut-off events. For 574514/574516 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 32885 event pairs, 747 based on Foata normal form. 3/5293 useless extension candidates. Maximal degree in co-relation 46231. Up to 4861 conditions per place. [2024-06-21 20:33:56,218 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 294 selfloop transitions, 56 changer transitions 0/355 dead transitions. [2024-06-21 20:33:56,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 355 transitions, 4554 flow [2024-06-21 20:33:56,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:33:56,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:33:56,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-21 20:33:56,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2024-06-21 20:33:56,219 INFO L175 Difference]: Start difference. First operand has 274 places, 331 transitions, 3698 flow. Second operand 8 states and 149 transitions. [2024-06-21 20:33:56,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 355 transitions, 4554 flow [2024-06-21 20:33:57,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 355 transitions, 4400 flow, removed 49 selfloop flow, removed 5 redundant places. [2024-06-21 20:33:57,184 INFO L231 Difference]: Finished difference. Result has 277 places, 334 transitions, 3762 flow [2024-06-21 20:33:57,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3544, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3762, PETRI_PLACES=277, PETRI_TRANSITIONS=334} [2024-06-21 20:33:57,184 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 234 predicate places. [2024-06-21 20:33:57,184 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 334 transitions, 3762 flow [2024-06-21 20:33:57,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:33:57,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:33:57,185 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:33:57,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-21 20:33:57,185 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:33:57,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:33:57,185 INFO L85 PathProgramCache]: Analyzing trace with hash -1491614500, now seen corresponding path program 1 times [2024-06-21 20:33:57,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:33:57,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748842998] [2024-06-21 20:33:57,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:33:57,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:33:57,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:33:58,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:33:58,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:33:58,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748842998] [2024-06-21 20:33:58,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748842998] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:33:58,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:33:58,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:33:58,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035361418] [2024-06-21 20:33:58,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:33:58,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:33:58,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:33:58,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:33:58,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:33:58,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:33:58,068 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 334 transitions, 3762 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:33:58,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:33:58,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:33:58,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:33:59,205 INFO L124 PetriNetUnfolderBase]: 3234/5313 cut-off events. [2024-06-21 20:33:59,206 INFO L125 PetriNetUnfolderBase]: For 593030/593036 co-relation queries the response was YES. [2024-06-21 20:33:59,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47106 conditions, 5313 events. 3234/5313 cut-off events. For 593030/593036 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 33140 event pairs, 748 based on Foata normal form. 6/5317 useless extension candidates. Maximal degree in co-relation 46976. Up to 4927 conditions per place. [2024-06-21 20:33:59,272 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 318 selfloop transitions, 37 changer transitions 0/360 dead transitions. [2024-06-21 20:33:59,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 360 transitions, 4642 flow [2024-06-21 20:33:59,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:33:59,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:33:59,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-21 20:33:59,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-21 20:33:59,275 INFO L175 Difference]: Start difference. First operand has 277 places, 334 transitions, 3762 flow. Second operand 8 states and 150 transitions. [2024-06-21 20:33:59,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 360 transitions, 4642 flow [2024-06-21 20:34:00,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 360 transitions, 4446 flow, removed 44 selfloop flow, removed 6 redundant places. [2024-06-21 20:34:00,023 INFO L231 Difference]: Finished difference. Result has 279 places, 337 transitions, 3732 flow [2024-06-21 20:34:00,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3566, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3732, PETRI_PLACES=279, PETRI_TRANSITIONS=337} [2024-06-21 20:34:00,024 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 236 predicate places. [2024-06-21 20:34:00,024 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 337 transitions, 3732 flow [2024-06-21 20:34:00,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:34:00,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:34:00,025 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:34:00,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-21 20:34:00,025 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:34:00,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:34:00,025 INFO L85 PathProgramCache]: Analyzing trace with hash -2070797090, now seen corresponding path program 4 times [2024-06-21 20:34:00,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:34:00,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917186040] [2024-06-21 20:34:00,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:34:00,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:34:00,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:34:00,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:34:00,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:34:00,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917186040] [2024-06-21 20:34:00,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917186040] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:34:00,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:34:00,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:34:00,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079966528] [2024-06-21 20:34:00,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:34:00,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:34:00,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:34:00,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:34:00,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:34:00,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:34:00,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 337 transitions, 3732 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 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) [2024-06-21 20:34:00,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:34:00,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:34:00,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:34:02,119 INFO L124 PetriNetUnfolderBase]: 3239/5317 cut-off events. [2024-06-21 20:34:02,119 INFO L125 PetriNetUnfolderBase]: For 604606/604608 co-relation queries the response was YES. [2024-06-21 20:34:02,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47679 conditions, 5317 events. 3239/5317 cut-off events. For 604606/604608 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 33111 event pairs, 746 based on Foata normal form. 3/5318 useless extension candidates. Maximal degree in co-relation 47548. Up to 4865 conditions per place. [2024-06-21 20:34:02,191 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 287 selfloop transitions, 67 changer transitions 0/359 dead transitions. [2024-06-21 20:34:02,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 359 transitions, 4760 flow [2024-06-21 20:34:02,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:34:02,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:34:02,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-21 20:34:02,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-21 20:34:02,192 INFO L175 Difference]: Start difference. First operand has 279 places, 337 transitions, 3732 flow. Second operand 8 states and 148 transitions. [2024-06-21 20:34:02,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 359 transitions, 4760 flow [2024-06-21 20:34:03,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 359 transitions, 4648 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-21 20:34:03,171 INFO L231 Difference]: Finished difference. Result has 282 places, 340 transitions, 3868 flow [2024-06-21 20:34:03,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3620, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3868, PETRI_PLACES=282, PETRI_TRANSITIONS=340} [2024-06-21 20:34:03,172 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 239 predicate places. [2024-06-21 20:34:03,172 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 340 transitions, 3868 flow [2024-06-21 20:34:03,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 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) [2024-06-21 20:34:03,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:34:03,172 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:34:03,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-21 20:34:03,173 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:34:03,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:34:03,173 INFO L85 PathProgramCache]: Analyzing trace with hash -945852509, now seen corresponding path program 1 times [2024-06-21 20:34:03,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:34:03,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157294991] [2024-06-21 20:34:03,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:34:03,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:34:03,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:34:04,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:34:04,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:34:04,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157294991] [2024-06-21 20:34:04,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157294991] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:34:04,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:34:04,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:34:04,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42576805] [2024-06-21 20:34:04,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:34:04,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:34:04,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:34:04,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:34:04,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:34:04,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:34:04,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 340 transitions, 3868 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 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) [2024-06-21 20:34:04,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:34:04,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:34:04,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:34:05,335 INFO L124 PetriNetUnfolderBase]: 3244/5329 cut-off events. [2024-06-21 20:34:05,335 INFO L125 PetriNetUnfolderBase]: For 622956/622962 co-relation queries the response was YES. [2024-06-21 20:34:05,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48277 conditions, 5329 events. 3244/5329 cut-off events. For 622956/622962 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 33260 event pairs, 743 based on Foata normal form. 7/5334 useless extension candidates. Maximal degree in co-relation 48145. Up to 4977 conditions per place. [2024-06-21 20:34:05,404 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 327 selfloop transitions, 30 changer transitions 0/362 dead transitions. [2024-06-21 20:34:05,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 362 transitions, 4706 flow [2024-06-21 20:34:05,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:34:05,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:34:05,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-21 20:34:05,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 20:34:05,405 INFO L175 Difference]: Start difference. First operand has 282 places, 340 transitions, 3868 flow. Second operand 8 states and 144 transitions. [2024-06-21 20:34:05,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 362 transitions, 4706 flow [2024-06-21 20:34:06,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 362 transitions, 4494 flow, removed 50 selfloop flow, removed 5 redundant places. [2024-06-21 20:34:06,399 INFO L231 Difference]: Finished difference. Result has 285 places, 343 transitions, 3794 flow [2024-06-21 20:34:06,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3656, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3794, PETRI_PLACES=285, PETRI_TRANSITIONS=343} [2024-06-21 20:34:06,400 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 242 predicate places. [2024-06-21 20:34:06,400 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 343 transitions, 3794 flow [2024-06-21 20:34:06,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 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) [2024-06-21 20:34:06,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:34:06,400 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:34:06,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-21 20:34:06,400 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:34:06,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:34:06,401 INFO L85 PathProgramCache]: Analyzing trace with hash -1491464770, now seen corresponding path program 2 times [2024-06-21 20:34:06,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:34:06,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757010743] [2024-06-21 20:34:06,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:34:06,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:34:06,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:34:07,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:34:07,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:34:07,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757010743] [2024-06-21 20:34:07,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757010743] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:34:07,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:34:07,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:34:07,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201998656] [2024-06-21 20:34:07,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:34:07,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:34:07,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:34:07,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:34:07,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:34:07,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:34:07,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 343 transitions, 3794 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:34:07,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:34:07,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:34:07,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:34:08,562 INFO L124 PetriNetUnfolderBase]: 3291/5401 cut-off events. [2024-06-21 20:34:08,562 INFO L125 PetriNetUnfolderBase]: For 637755/637761 co-relation queries the response was YES. [2024-06-21 20:34:08,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49033 conditions, 5401 events. 3291/5401 cut-off events. For 637755/637761 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 33695 event pairs, 755 based on Foata normal form. 6/5404 useless extension candidates. Maximal degree in co-relation 48900. Up to 4986 conditions per place. [2024-06-21 20:34:08,625 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 326 selfloop transitions, 47 changer transitions 0/378 dead transitions. [2024-06-21 20:34:08,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 378 transitions, 4860 flow [2024-06-21 20:34:08,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:34:08,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:34:08,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-21 20:34:08,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-21 20:34:08,628 INFO L175 Difference]: Start difference. First operand has 285 places, 343 transitions, 3794 flow. Second operand 9 states and 161 transitions. [2024-06-21 20:34:08,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 378 transitions, 4860 flow [2024-06-21 20:34:09,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 378 transitions, 4733 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-21 20:34:09,591 INFO L231 Difference]: Finished difference. Result has 289 places, 357 transitions, 4000 flow [2024-06-21 20:34:09,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3678, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4000, PETRI_PLACES=289, PETRI_TRANSITIONS=357} [2024-06-21 20:34:09,592 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 246 predicate places. [2024-06-21 20:34:09,592 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 357 transitions, 4000 flow [2024-06-21 20:34:09,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:34:09,593 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:34:09,593 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:34:09,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-21 20:34:09,593 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:34:09,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:34:09,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1284811330, now seen corresponding path program 3 times [2024-06-21 20:34:09,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:34:09,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152166824] [2024-06-21 20:34:09,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:34:09,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:34:09,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:34:10,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:34:10,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:34:10,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152166824] [2024-06-21 20:34:10,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152166824] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:34:10,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:34:10,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:34:10,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545651068] [2024-06-21 20:34:10,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:34:10,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:34:10,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:34:10,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:34:10,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:34:10,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:34:10,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 357 transitions, 4000 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 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) [2024-06-21 20:34:10,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:34:10,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:34:10,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:34:11,672 INFO L124 PetriNetUnfolderBase]: 3317/5441 cut-off events. [2024-06-21 20:34:11,672 INFO L125 PetriNetUnfolderBase]: For 663943/663949 co-relation queries the response was YES. [2024-06-21 20:34:11,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50337 conditions, 5441 events. 3317/5441 cut-off events. For 663943/663949 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 34038 event pairs, 756 based on Foata normal form. 6/5445 useless extension candidates. Maximal degree in co-relation 50202. Up to 4979 conditions per place. [2024-06-21 20:34:11,751 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 315 selfloop transitions, 62 changer transitions 0/382 dead transitions. [2024-06-21 20:34:11,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 382 transitions, 5210 flow [2024-06-21 20:34:11,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:34:11,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:34:11,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-21 20:34:11,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-21 20:34:11,753 INFO L175 Difference]: Start difference. First operand has 289 places, 357 transitions, 4000 flow. Second operand 8 states and 148 transitions. [2024-06-21 20:34:11,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 382 transitions, 5210 flow [2024-06-21 20:34:13,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 382 transitions, 5063 flow, removed 38 selfloop flow, removed 5 redundant places. [2024-06-21 20:34:13,012 INFO L231 Difference]: Finished difference. Result has 292 places, 363 transitions, 4181 flow [2024-06-21 20:34:13,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3853, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4181, PETRI_PLACES=292, PETRI_TRANSITIONS=363} [2024-06-21 20:34:13,013 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 249 predicate places. [2024-06-21 20:34:13,013 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 363 transitions, 4181 flow [2024-06-21 20:34:13,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 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) [2024-06-21 20:34:13,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:34:13,013 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:34:13,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-21 20:34:13,013 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:34:13,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:34:13,014 INFO L85 PathProgramCache]: Analyzing trace with hash 1522785372, now seen corresponding path program 5 times [2024-06-21 20:34:13,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:34:13,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547627578] [2024-06-21 20:34:13,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:34:13,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:34:13,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:34:13,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:34:13,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:34:13,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547627578] [2024-06-21 20:34:13,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547627578] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:34:13,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:34:13,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:34:13,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427883799] [2024-06-21 20:34:13,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:34:13,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:34:13,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:34:13,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:34:13,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:34:13,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:34:13,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 363 transitions, 4181 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:34:13,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:34:13,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:34:13,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:34:15,126 INFO L124 PetriNetUnfolderBase]: 3338/5469 cut-off events. [2024-06-21 20:34:15,126 INFO L125 PetriNetUnfolderBase]: For 689199/689201 co-relation queries the response was YES. [2024-06-21 20:34:15,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51514 conditions, 5469 events. 3338/5469 cut-off events. For 689199/689201 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 34143 event pairs, 760 based on Foata normal form. 3/5470 useless extension candidates. Maximal degree in co-relation 51379. Up to 4947 conditions per place. [2024-06-21 20:34:15,203 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 298 selfloop transitions, 86 changer transitions 0/389 dead transitions. [2024-06-21 20:34:15,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 389 transitions, 5681 flow [2024-06-21 20:34:15,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:34:15,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:34:15,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-21 20:34:15,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-21 20:34:15,205 INFO L175 Difference]: Start difference. First operand has 292 places, 363 transitions, 4181 flow. Second operand 8 states and 147 transitions. [2024-06-21 20:34:15,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 389 transitions, 5681 flow [2024-06-21 20:34:16,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 389 transitions, 5549 flow, removed 44 selfloop flow, removed 4 redundant places. [2024-06-21 20:34:16,441 INFO L231 Difference]: Finished difference. Result has 296 places, 372 transitions, 4575 flow [2024-06-21 20:34:16,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4049, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4575, PETRI_PLACES=296, PETRI_TRANSITIONS=372} [2024-06-21 20:34:16,441 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 253 predicate places. [2024-06-21 20:34:16,441 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 372 transitions, 4575 flow [2024-06-21 20:34:16,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:34:16,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:34:16,442 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:34:16,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-21 20:34:16,442 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:34:16,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:34:16,442 INFO L85 PathProgramCache]: Analyzing trace with hash -1284811113, now seen corresponding path program 2 times [2024-06-21 20:34:16,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:34:16,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083155596] [2024-06-21 20:34:16,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:34:16,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:34:16,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:34:17,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:34:17,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:34:17,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083155596] [2024-06-21 20:34:17,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083155596] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:34:17,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:34:17,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:34:17,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402810773] [2024-06-21 20:34:17,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:34:17,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:34:17,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:34:17,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:34:17,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:34:17,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:34:17,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 372 transitions, 4575 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 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) [2024-06-21 20:34:17,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:34:17,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:34:17,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:34:18,862 INFO L124 PetriNetUnfolderBase]: 3343/5479 cut-off events. [2024-06-21 20:34:18,862 INFO L125 PetriNetUnfolderBase]: For 708898/708904 co-relation queries the response was YES. [2024-06-21 20:34:18,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52202 conditions, 5479 events. 3343/5479 cut-off events. For 708898/708904 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 34325 event pairs, 748 based on Foata normal form. 7/5484 useless extension candidates. Maximal degree in co-relation 52065. Up to 5096 conditions per place. [2024-06-21 20:34:18,944 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 345 selfloop transitions, 41 changer transitions 0/391 dead transitions. [2024-06-21 20:34:18,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 391 transitions, 5473 flow [2024-06-21 20:34:18,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:34:18,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:34:18,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-21 20:34:18,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-21 20:34:18,946 INFO L175 Difference]: Start difference. First operand has 296 places, 372 transitions, 4575 flow. Second operand 8 states and 142 transitions. [2024-06-21 20:34:18,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 391 transitions, 5473 flow [2024-06-21 20:34:20,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 391 transitions, 5288 flow, removed 68 selfloop flow, removed 3 redundant places. [2024-06-21 20:34:20,216 INFO L231 Difference]: Finished difference. Result has 301 places, 375 transitions, 4562 flow [2024-06-21 20:34:20,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4392, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4562, PETRI_PLACES=301, PETRI_TRANSITIONS=375} [2024-06-21 20:34:20,216 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 258 predicate places. [2024-06-21 20:34:20,217 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 375 transitions, 4562 flow [2024-06-21 20:34:20,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 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) [2024-06-21 20:34:20,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:34:20,217 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:34:20,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-21 20:34:20,217 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:34:20,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:34:20,217 INFO L85 PathProgramCache]: Analyzing trace with hash 796512250, now seen corresponding path program 6 times [2024-06-21 20:34:20,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:34:20,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139680411] [2024-06-21 20:34:20,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:34:20,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:34:20,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:34:21,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:34:21,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:34:21,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139680411] [2024-06-21 20:34:21,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139680411] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:34:21,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:34:21,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:34:21,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273575729] [2024-06-21 20:34:21,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:34:21,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:34:21,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:34:21,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:34:21,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:34:21,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:34:21,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 375 transitions, 4562 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:34:21,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:34:21,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:34:21,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:34:22,492 INFO L124 PetriNetUnfolderBase]: 3340/5468 cut-off events. [2024-06-21 20:34:22,493 INFO L125 PetriNetUnfolderBase]: For 710956/710956 co-relation queries the response was YES. [2024-06-21 20:34:22,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52114 conditions, 5468 events. 3340/5468 cut-off events. For 710956/710956 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 34139 event pairs, 742 based on Foata normal form. 1/5467 useless extension candidates. Maximal degree in co-relation 51975. Up to 5091 conditions per place. [2024-06-21 20:34:22,574 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 345 selfloop transitions, 40 changer transitions 0/390 dead transitions. [2024-06-21 20:34:22,574 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 390 transitions, 5374 flow [2024-06-21 20:34:22,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:34:22,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:34:22,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-21 20:34:22,575 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-21 20:34:22,575 INFO L175 Difference]: Start difference. First operand has 301 places, 375 transitions, 4562 flow. Second operand 8 states and 141 transitions. [2024-06-21 20:34:22,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 390 transitions, 5374 flow [2024-06-21 20:34:23,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 390 transitions, 5142 flow, removed 77 selfloop flow, removed 6 redundant places. [2024-06-21 20:34:23,903 INFO L231 Difference]: Finished difference. Result has 303 places, 375 transitions, 4416 flow [2024-06-21 20:34:23,904 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4330, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4416, PETRI_PLACES=303, PETRI_TRANSITIONS=375} [2024-06-21 20:34:23,904 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 260 predicate places. [2024-06-21 20:34:23,904 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 375 transitions, 4416 flow [2024-06-21 20:34:23,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:34:23,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:34:23,905 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:34:23,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-21 20:34:23,905 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:34:23,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:34:23,905 INFO L85 PathProgramCache]: Analyzing trace with hash -1284544203, now seen corresponding path program 3 times [2024-06-21 20:34:23,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:34:23,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823243359] [2024-06-21 20:34:23,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:34:23,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:34:23,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:34:24,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:34:24,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:34:24,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823243359] [2024-06-21 20:34:24,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823243359] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:34:24,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:34:24,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:34:24,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452091827] [2024-06-21 20:34:24,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:34:24,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:34:24,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:34:24,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:34:24,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:34:24,902 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:34:24,902 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 375 transitions, 4416 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 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) [2024-06-21 20:34:24,902 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:34:24,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:34:24,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:34:26,102 INFO L124 PetriNetUnfolderBase]: 3353/5493 cut-off events. [2024-06-21 20:34:26,102 INFO L125 PetriNetUnfolderBase]: For 729134/729140 co-relation queries the response was YES. [2024-06-21 20:34:26,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52453 conditions, 5493 events. 3353/5493 cut-off events. For 729134/729140 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 34380 event pairs, 748 based on Foata normal form. 7/5498 useless extension candidates. Maximal degree in co-relation 52313. Up to 5095 conditions per place. [2024-06-21 20:34:26,177 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 344 selfloop transitions, 51 changer transitions 0/400 dead transitions. [2024-06-21 20:34:26,177 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 400 transitions, 5611 flow [2024-06-21 20:34:26,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:34:26,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:34:26,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-21 20:34:26,178 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 20:34:26,178 INFO L175 Difference]: Start difference. First operand has 303 places, 375 transitions, 4416 flow. Second operand 8 states and 144 transitions. [2024-06-21 20:34:26,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 400 transitions, 5611 flow [2024-06-21 20:34:27,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 400 transitions, 5463 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-21 20:34:27,566 INFO L231 Difference]: Finished difference. Result has 304 places, 383 transitions, 4579 flow [2024-06-21 20:34:27,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4268, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4579, PETRI_PLACES=304, PETRI_TRANSITIONS=383} [2024-06-21 20:34:27,567 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 261 predicate places. [2024-06-21 20:34:27,567 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 383 transitions, 4579 flow [2024-06-21 20:34:27,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 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) [2024-06-21 20:34:27,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:34:27,567 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:34:27,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-21 20:34:27,567 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:34:27,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:34:27,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1511611236, now seen corresponding path program 1 times [2024-06-21 20:34:27,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:34:27,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318597409] [2024-06-21 20:34:27,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:34:27,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:34:27,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:34:28,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:34:28,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:34:28,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318597409] [2024-06-21 20:34:28,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318597409] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:34:28,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:34:28,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:34:28,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312556361] [2024-06-21 20:34:28,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:34:28,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:34:28,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:34:28,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:34:28,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:34:28,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 20:34:28,467 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 383 transitions, 4579 flow. Second operand has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:34:28,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:34:28,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 20:34:28,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:34:29,673 INFO L124 PetriNetUnfolderBase]: 3252/5353 cut-off events. [2024-06-21 20:34:29,673 INFO L125 PetriNetUnfolderBase]: For 755698/755732 co-relation queries the response was YES. [2024-06-21 20:34:29,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51980 conditions, 5353 events. 3252/5353 cut-off events. For 755698/755732 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 33872 event pairs, 701 based on Foata normal form. 36/5333 useless extension candidates. Maximal degree in co-relation 51840. Up to 4808 conditions per place. [2024-06-21 20:34:29,753 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 331 selfloop transitions, 36 changer transitions 0/410 dead transitions. [2024-06-21 20:34:29,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 410 transitions, 5464 flow [2024-06-21 20:34:29,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:34:29,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:34:29,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-21 20:34:29,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-21 20:34:29,754 INFO L175 Difference]: Start difference. First operand has 304 places, 383 transitions, 4579 flow. Second operand 9 states and 168 transitions. [2024-06-21 20:34:29,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 410 transitions, 5464 flow [2024-06-21 20:34:31,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 410 transitions, 5327 flow, removed 45 selfloop flow, removed 4 redundant places. [2024-06-21 20:34:31,115 INFO L231 Difference]: Finished difference. Result has 310 places, 387 transitions, 4613 flow [2024-06-21 20:34:31,116 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4442, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4613, PETRI_PLACES=310, PETRI_TRANSITIONS=387} [2024-06-21 20:34:31,116 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 267 predicate places. [2024-06-21 20:34:31,116 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 387 transitions, 4613 flow [2024-06-21 20:34:31,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:34:31,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:34:31,116 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:34:31,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-21 20:34:31,116 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:34:31,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:34:31,117 INFO L85 PathProgramCache]: Analyzing trace with hash -1600421152, now seen corresponding path program 2 times [2024-06-21 20:34:31,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:34:31,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338272739] [2024-06-21 20:34:31,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:34:31,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:34:31,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:34:31,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:34:31,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:34:31,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338272739] [2024-06-21 20:34:31,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338272739] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:34:31,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:34:31,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:34:31,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107383720] [2024-06-21 20:34:31,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:34:31,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:34:31,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:34:31,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:34:31,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:34:31,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 20:34:31,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 387 transitions, 4613 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-21 20:34:31,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:34:31,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 20:34:31,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:34:33,150 INFO L124 PetriNetUnfolderBase]: 3255/5375 cut-off events. [2024-06-21 20:34:33,150 INFO L125 PetriNetUnfolderBase]: For 769455/769493 co-relation queries the response was YES. [2024-06-21 20:34:33,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52431 conditions, 5375 events. 3255/5375 cut-off events. For 769455/769493 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 34105 event pairs, 708 based on Foata normal form. 40/5373 useless extension candidates. Maximal degree in co-relation 52288. Up to 4839 conditions per place. [2024-06-21 20:34:33,230 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 331 selfloop transitions, 37 changer transitions 0/411 dead transitions. [2024-06-21 20:34:33,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 411 transitions, 5489 flow [2024-06-21 20:34:33,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:34:33,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:34:33,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-21 20:34:33,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-21 20:34:33,231 INFO L175 Difference]: Start difference. First operand has 310 places, 387 transitions, 4613 flow. Second operand 8 states and 152 transitions. [2024-06-21 20:34:33,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 411 transitions, 5489 flow [2024-06-21 20:34:34,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 411 transitions, 5359 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-21 20:34:34,583 INFO L231 Difference]: Finished difference. Result has 312 places, 389 transitions, 4640 flow [2024-06-21 20:34:34,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4483, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=387, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4640, PETRI_PLACES=312, PETRI_TRANSITIONS=389} [2024-06-21 20:34:34,584 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 269 predicate places. [2024-06-21 20:34:34,584 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 389 transitions, 4640 flow [2024-06-21 20:34:34,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-21 20:34:34,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:34:34,584 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:34:34,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-21 20:34:34,584 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:34:34,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:34:34,585 INFO L85 PathProgramCache]: Analyzing trace with hash 1819673696, now seen corresponding path program 3 times [2024-06-21 20:34:34,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:34:34,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027610154] [2024-06-21 20:34:34,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:34:34,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:34:34,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:34:35,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:34:35,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:34:35,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027610154] [2024-06-21 20:34:35,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027610154] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:34:35,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:34:35,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:34:35,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612159104] [2024-06-21 20:34:35,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:34:35,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:34:35,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:34:35,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:34:35,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:34:35,718 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 20:34:35,718 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 389 transitions, 4640 flow. Second operand has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:34:35,718 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:34:35,718 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 20:34:35,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:34:36,895 INFO L124 PetriNetUnfolderBase]: 3283/5409 cut-off events. [2024-06-21 20:34:36,895 INFO L125 PetriNetUnfolderBase]: For 787595/787629 co-relation queries the response was YES. [2024-06-21 20:34:36,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52956 conditions, 5409 events. 3283/5409 cut-off events. For 787595/787629 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 34263 event pairs, 712 based on Foata normal form. 36/5401 useless extension candidates. Maximal degree in co-relation 52812. Up to 4868 conditions per place. [2024-06-21 20:34:36,978 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 330 selfloop transitions, 41 changer transitions 0/414 dead transitions. [2024-06-21 20:34:36,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 414 transitions, 5597 flow [2024-06-21 20:34:36,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:34:36,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:34:36,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-21 20:34:36,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 20:34:36,980 INFO L175 Difference]: Start difference. First operand has 312 places, 389 transitions, 4640 flow. Second operand 9 states and 162 transitions. [2024-06-21 20:34:36,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 414 transitions, 5597 flow [2024-06-21 20:34:38,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 414 transitions, 5462 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-21 20:34:38,586 INFO L231 Difference]: Finished difference. Result has 318 places, 400 transitions, 4806 flow [2024-06-21 20:34:38,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4507, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4806, PETRI_PLACES=318, PETRI_TRANSITIONS=400} [2024-06-21 20:34:38,587 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 275 predicate places. [2024-06-21 20:34:38,587 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 400 transitions, 4806 flow [2024-06-21 20:34:38,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:34:38,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:34:38,588 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:34:38,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-21 20:34:38,588 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:34:38,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:34:38,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1455952826, now seen corresponding path program 4 times [2024-06-21 20:34:38,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:34:38,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175480169] [2024-06-21 20:34:38,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:34:38,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:34:38,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:34:39,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:34:39,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:34:39,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175480169] [2024-06-21 20:34:39,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175480169] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:34:39,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:34:39,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:34:39,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214107633] [2024-06-21 20:34:39,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:34:39,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:34:39,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:34:39,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:34:39,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:34:39,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:34:39,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 400 transitions, 4806 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:34:39,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:34:39,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:34:39,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:34:40,741 INFO L124 PetriNetUnfolderBase]: 3420/5597 cut-off events. [2024-06-21 20:34:40,742 INFO L125 PetriNetUnfolderBase]: For 798149/798155 co-relation queries the response was YES. [2024-06-21 20:34:40,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54492 conditions, 5597 events. 3420/5597 cut-off events. For 798149/798155 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 35112 event pairs, 742 based on Foata normal form. 8/5602 useless extension candidates. Maximal degree in co-relation 54345. Up to 5182 conditions per place. [2024-06-21 20:34:40,845 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 377 selfloop transitions, 42 changer transitions 0/424 dead transitions. [2024-06-21 20:34:40,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 424 transitions, 5822 flow [2024-06-21 20:34:40,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:34:40,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:34:40,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-21 20:34:40,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-21 20:34:40,846 INFO L175 Difference]: Start difference. First operand has 318 places, 400 transitions, 4806 flow. Second operand 8 states and 146 transitions. [2024-06-21 20:34:40,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 424 transitions, 5822 flow [2024-06-21 20:34:42,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 424 transitions, 5684 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-06-21 20:34:42,276 INFO L231 Difference]: Finished difference. Result has 321 places, 403 transitions, 4858 flow [2024-06-21 20:34:42,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4668, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4858, PETRI_PLACES=321, PETRI_TRANSITIONS=403} [2024-06-21 20:34:42,277 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 278 predicate places. [2024-06-21 20:34:42,277 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 403 transitions, 4858 flow [2024-06-21 20:34:42,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:34:42,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:34:42,277 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:34:42,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-21 20:34:42,277 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:34:42,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:34:42,278 INFO L85 PathProgramCache]: Analyzing trace with hash 1468332986, now seen corresponding path program 5 times [2024-06-21 20:34:42,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:34:42,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284174904] [2024-06-21 20:34:42,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:34:42,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:34:42,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:34:43,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:34:43,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:34:43,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284174904] [2024-06-21 20:34:43,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284174904] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:34:43,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:34:43,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:34:43,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278131027] [2024-06-21 20:34:43,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:34:43,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:34:43,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:34:43,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:34:43,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:34:43,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:34:43,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 403 transitions, 4858 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:34:43,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:34:43,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:34:43,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:34:44,572 INFO L124 PetriNetUnfolderBase]: 3446/5635 cut-off events. [2024-06-21 20:34:44,573 INFO L125 PetriNetUnfolderBase]: For 823619/823625 co-relation queries the response was YES. [2024-06-21 20:34:44,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55316 conditions, 5635 events. 3446/5635 cut-off events. For 823619/823625 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 35395 event pairs, 743 based on Foata normal form. 8/5640 useless extension candidates. Maximal degree in co-relation 55168. Up to 5183 conditions per place. [2024-06-21 20:34:44,657 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 368 selfloop transitions, 56 changer transitions 0/429 dead transitions. [2024-06-21 20:34:44,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 429 transitions, 6204 flow [2024-06-21 20:34:44,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:34:44,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:34:44,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-21 20:34:44,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-21 20:34:44,659 INFO L175 Difference]: Start difference. First operand has 321 places, 403 transitions, 4858 flow. Second operand 8 states and 146 transitions. [2024-06-21 20:34:44,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 429 transitions, 6204 flow [2024-06-21 20:34:46,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 429 transitions, 6014 flow, removed 36 selfloop flow, removed 8 redundant places. [2024-06-21 20:34:46,520 INFO L231 Difference]: Finished difference. Result has 322 places, 409 transitions, 5030 flow [2024-06-21 20:34:46,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4668, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5030, PETRI_PLACES=322, PETRI_TRANSITIONS=409} [2024-06-21 20:34:46,520 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 279 predicate places. [2024-06-21 20:34:46,521 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 409 transitions, 5030 flow [2024-06-21 20:34:46,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:34:46,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:34:46,521 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:34:46,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-21 20:34:46,521 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:34:46,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:34:46,522 INFO L85 PathProgramCache]: Analyzing trace with hash 1228051676, now seen corresponding path program 6 times [2024-06-21 20:34:46,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:34:46,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108057588] [2024-06-21 20:34:46,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:34:46,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:34:46,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:34:47,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:34:47,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:34:47,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108057588] [2024-06-21 20:34:47,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108057588] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:34:47,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:34:47,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:34:47,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215118340] [2024-06-21 20:34:47,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:34:47,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:34:47,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:34:47,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:34:47,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:34:47,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:34:47,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 409 transitions, 5030 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:34:47,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:34:47,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:34:47,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:34:48,635 INFO L124 PetriNetUnfolderBase]: 3440/5627 cut-off events. [2024-06-21 20:34:48,635 INFO L125 PetriNetUnfolderBase]: For 833851/833857 co-relation queries the response was YES. [2024-06-21 20:34:48,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55582 conditions, 5627 events. 3440/5627 cut-off events. For 833851/833857 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 35308 event pairs, 744 based on Foata normal form. 8/5632 useless extension candidates. Maximal degree in co-relation 55432. Up to 5210 conditions per place. [2024-06-21 20:34:48,724 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 384 selfloop transitions, 41 changer transitions 0/430 dead transitions. [2024-06-21 20:34:48,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 430 transitions, 5964 flow [2024-06-21 20:34:48,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:34:48,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:34:48,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-21 20:34:48,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-21 20:34:48,725 INFO L175 Difference]: Start difference. First operand has 322 places, 409 transitions, 5030 flow. Second operand 8 states and 147 transitions. [2024-06-21 20:34:48,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 430 transitions, 5964 flow [2024-06-21 20:34:50,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 430 transitions, 5718 flow, removed 79 selfloop flow, removed 5 redundant places. [2024-06-21 20:34:50,304 INFO L231 Difference]: Finished difference. Result has 325 places, 409 transitions, 4872 flow [2024-06-21 20:34:50,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4784, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=409, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4872, PETRI_PLACES=325, PETRI_TRANSITIONS=409} [2024-06-21 20:34:50,305 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 282 predicate places. [2024-06-21 20:34:50,305 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 409 transitions, 4872 flow [2024-06-21 20:34:50,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:34:50,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:34:50,305 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:34:50,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-21 20:34:50,305 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:34:50,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:34:50,306 INFO L85 PathProgramCache]: Analyzing trace with hash 1227872930, now seen corresponding path program 7 times [2024-06-21 20:34:50,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:34:50,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027681660] [2024-06-21 20:34:50,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:34:50,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:34:50,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:34:51,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:34:51,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:34:51,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027681660] [2024-06-21 20:34:51,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027681660] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:34:51,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:34:51,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:34:51,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136094596] [2024-06-21 20:34:51,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:34:51,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:34:51,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:34:51,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:34:51,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:34:51,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:34:51,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 409 transitions, 4872 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:34:51,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:34:51,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:34:51,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:34:52,589 INFO L124 PetriNetUnfolderBase]: 3445/5632 cut-off events. [2024-06-21 20:34:52,589 INFO L125 PetriNetUnfolderBase]: For 843226/843226 co-relation queries the response was YES. [2024-06-21 20:34:52,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55553 conditions, 5632 events. 3445/5632 cut-off events. For 843226/843226 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 35325 event pairs, 752 based on Foata normal form. 1/5629 useless extension candidates. Maximal degree in co-relation 55402. Up to 5169 conditions per place. [2024-06-21 20:34:52,686 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 370 selfloop transitions, 56 changer transitions 0/431 dead transitions. [2024-06-21 20:34:52,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 431 transitions, 5892 flow [2024-06-21 20:34:52,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:34:52,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:34:52,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-21 20:34:52,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-21 20:34:52,688 INFO L175 Difference]: Start difference. First operand has 325 places, 409 transitions, 4872 flow. Second operand 8 states and 146 transitions. [2024-06-21 20:34:52,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 431 transitions, 5892 flow [2024-06-21 20:34:54,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 431 transitions, 5778 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-21 20:34:54,768 INFO L231 Difference]: Finished difference. Result has 326 places, 412 transitions, 4994 flow [2024-06-21 20:34:54,768 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4758, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=409, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4994, PETRI_PLACES=326, PETRI_TRANSITIONS=412} [2024-06-21 20:34:54,768 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 283 predicate places. [2024-06-21 20:34:54,769 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 412 transitions, 4994 flow [2024-06-21 20:34:54,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:34:54,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:34:54,769 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:34:54,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-21 20:34:54,769 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:34:54,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:34:54,770 INFO L85 PathProgramCache]: Analyzing trace with hash 1228201406, now seen corresponding path program 7 times [2024-06-21 20:34:54,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:34:54,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959518172] [2024-06-21 20:34:54,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:34:54,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:34:54,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:34:55,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:34:55,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:34:55,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959518172] [2024-06-21 20:34:55,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959518172] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:34:55,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:34:55,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:34:55,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106836193] [2024-06-21 20:34:55,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:34:55,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:34:55,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:34:55,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:34:55,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:34:55,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:34:55,846 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 412 transitions, 4994 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:34:55,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:34:55,846 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:34:55,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:34:57,188 INFO L124 PetriNetUnfolderBase]: 3455/5652 cut-off events. [2024-06-21 20:34:57,189 INFO L125 PetriNetUnfolderBase]: For 865822/865828 co-relation queries the response was YES. [2024-06-21 20:34:57,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55971 conditions, 5652 events. 3455/5652 cut-off events. For 865822/865828 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 35521 event pairs, 744 based on Foata normal form. 8/5657 useless extension candidates. Maximal degree in co-relation 55819. Up to 5216 conditions per place. [2024-06-21 20:34:57,272 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 378 selfloop transitions, 51 changer transitions 0/434 dead transitions. [2024-06-21 20:34:57,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 434 transitions, 6054 flow [2024-06-21 20:34:57,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:34:57,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:34:57,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-21 20:34:57,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41798941798941797 [2024-06-21 20:34:57,274 INFO L175 Difference]: Start difference. First operand has 326 places, 412 transitions, 4994 flow. Second operand 9 states and 158 transitions. [2024-06-21 20:34:57,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 434 transitions, 6054 flow [2024-06-21 20:34:58,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 434 transitions, 5846 flow, removed 50 selfloop flow, removed 6 redundant places. [2024-06-21 20:34:58,946 INFO L231 Difference]: Finished difference. Result has 329 places, 415 transitions, 5006 flow [2024-06-21 20:34:58,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4786, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=361, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5006, PETRI_PLACES=329, PETRI_TRANSITIONS=415} [2024-06-21 20:34:58,947 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 286 predicate places. [2024-06-21 20:34:58,947 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 415 transitions, 5006 flow [2024-06-21 20:34:58,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:34:58,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:34:58,947 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:34:58,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-21 20:34:58,947 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:34:58,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:34:58,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1228201220, now seen corresponding path program 8 times [2024-06-21 20:34:58,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:34:58,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751366158] [2024-06-21 20:34:58,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:34:58,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:34:58,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:34:59,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:34:59,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:34:59,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751366158] [2024-06-21 20:34:59,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751366158] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:34:59,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:34:59,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:34:59,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52186142] [2024-06-21 20:34:59,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:34:59,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:34:59,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:34:59,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:34:59,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:34:59,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:34:59,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 415 transitions, 5006 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 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) [2024-06-21 20:34:59,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:34:59,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:34:59,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:35:01,296 INFO L124 PetriNetUnfolderBase]: 3452/5644 cut-off events. [2024-06-21 20:35:01,296 INFO L125 PetriNetUnfolderBase]: For 870158/870158 co-relation queries the response was YES. [2024-06-21 20:35:01,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55872 conditions, 5644 events. 3452/5644 cut-off events. For 870158/870158 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 35371 event pairs, 752 based on Foata normal form. 1/5641 useless extension candidates. Maximal degree in co-relation 55719. Up to 5173 conditions per place. [2024-06-21 20:35:01,370 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 365 selfloop transitions, 61 changer transitions 0/431 dead transitions. [2024-06-21 20:35:01,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 431 transitions, 5904 flow [2024-06-21 20:35:01,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:35:01,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:35:01,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-21 20:35:01,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-21 20:35:01,371 INFO L175 Difference]: Start difference. First operand has 329 places, 415 transitions, 5006 flow. Second operand 8 states and 145 transitions. [2024-06-21 20:35:01,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 431 transitions, 5904 flow [2024-06-21 20:35:03,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 431 transitions, 5722 flow, removed 42 selfloop flow, removed 7 redundant places. [2024-06-21 20:35:03,187 INFO L231 Difference]: Finished difference. Result has 330 places, 415 transitions, 4952 flow [2024-06-21 20:35:03,187 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4824, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4952, PETRI_PLACES=330, PETRI_TRANSITIONS=415} [2024-06-21 20:35:03,188 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 287 predicate places. [2024-06-21 20:35:03,188 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 415 transitions, 4952 flow [2024-06-21 20:35:03,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 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) [2024-06-21 20:35:03,188 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:35:03,188 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:35:03,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-21 20:35:03,188 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:35:03,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:35:03,190 INFO L85 PathProgramCache]: Analyzing trace with hash -746550719, now seen corresponding path program 4 times [2024-06-21 20:35:03,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:35:03,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944306665] [2024-06-21 20:35:03,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:35:03,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:35:03,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:35:04,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:35:04,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:35:04,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944306665] [2024-06-21 20:35:04,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944306665] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:35:04,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:35:04,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:35:04,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311445820] [2024-06-21 20:35:04,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:35:04,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:35:04,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:35:04,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:35:04,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:35:04,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:35:04,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 415 transitions, 4952 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 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) [2024-06-21 20:35:04,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:35:04,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:35:04,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:35:05,459 INFO L124 PetriNetUnfolderBase]: 3449/5644 cut-off events. [2024-06-21 20:35:05,459 INFO L125 PetriNetUnfolderBase]: For 879553/879559 co-relation queries the response was YES. [2024-06-21 20:35:05,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55790 conditions, 5644 events. 3449/5644 cut-off events. For 879553/879559 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 35502 event pairs, 744 based on Foata normal form. 7/5648 useless extension candidates. Maximal degree in co-relation 55636. Up to 5268 conditions per place. [2024-06-21 20:35:05,545 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 397 selfloop transitions, 31 changer transitions 0/433 dead transitions. [2024-06-21 20:35:05,545 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 433 transitions, 5887 flow [2024-06-21 20:35:05,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:35:05,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:35:05,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-21 20:35:05,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-21 20:35:05,549 INFO L175 Difference]: Start difference. First operand has 330 places, 415 transitions, 4952 flow. Second operand 8 states and 141 transitions. [2024-06-21 20:35:05,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 433 transitions, 5887 flow [2024-06-21 20:35:07,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 433 transitions, 5506 flow, removed 85 selfloop flow, removed 8 redundant places. [2024-06-21 20:35:07,697 INFO L231 Difference]: Finished difference. Result has 330 places, 416 transitions, 4668 flow [2024-06-21 20:35:07,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4589, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4668, PETRI_PLACES=330, PETRI_TRANSITIONS=416} [2024-06-21 20:35:07,697 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 287 predicate places. [2024-06-21 20:35:07,698 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 416 transitions, 4668 flow [2024-06-21 20:35:07,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 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) [2024-06-21 20:35:07,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:35:07,698 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:35:07,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-21 20:35:07,698 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:35:07,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:35:07,699 INFO L85 PathProgramCache]: Analyzing trace with hash -1650386240, now seen corresponding path program 8 times [2024-06-21 20:35:07,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:35:07,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176305336] [2024-06-21 20:35:07,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:35:07,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:35:07,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:35:08,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:35:08,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:35:08,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176305336] [2024-06-21 20:35:08,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176305336] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:35:08,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:35:08,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:35:08,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512317958] [2024-06-21 20:35:08,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:35:08,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:35:08,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:35:08,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:35:08,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:35:08,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:35:08,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 416 transitions, 4668 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 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) [2024-06-21 20:35:08,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:35:08,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:35:08,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:35:09,824 INFO L124 PetriNetUnfolderBase]: 3475/5682 cut-off events. [2024-06-21 20:35:09,825 INFO L125 PetriNetUnfolderBase]: For 911452/911458 co-relation queries the response was YES. [2024-06-21 20:35:09,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56342 conditions, 5682 events. 3475/5682 cut-off events. For 911452/911458 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 35747 event pairs, 745 based on Foata normal form. 8/5687 useless extension candidates. Maximal degree in co-relation 56188. Up to 5168 conditions per place. [2024-06-21 20:35:09,913 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 351 selfloop transitions, 84 changer transitions 0/440 dead transitions. [2024-06-21 20:35:09,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 440 transitions, 6084 flow [2024-06-21 20:35:09,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:35:09,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:35:09,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-21 20:35:09,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-21 20:35:09,915 INFO L175 Difference]: Start difference. First operand has 330 places, 416 transitions, 4668 flow. Second operand 8 states and 146 transitions. [2024-06-21 20:35:09,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 440 transitions, 6084 flow [2024-06-21 20:35:11,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 440 transitions, 6010 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-21 20:35:11,985 INFO L231 Difference]: Finished difference. Result has 332 places, 422 transitions, 5010 flow [2024-06-21 20:35:11,985 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4594, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5010, PETRI_PLACES=332, PETRI_TRANSITIONS=422} [2024-06-21 20:35:11,985 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 289 predicate places. [2024-06-21 20:35:11,986 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 422 transitions, 5010 flow [2024-06-21 20:35:11,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 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) [2024-06-21 20:35:11,986 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:35:11,986 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:35:11,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-21 20:35:11,986 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:35:11,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:35:11,986 INFO L85 PathProgramCache]: Analyzing trace with hash -1650623173, now seen corresponding path program 5 times [2024-06-21 20:35:11,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:35:11,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531238168] [2024-06-21 20:35:11,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:35:11,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:35:11,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:35:13,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:35:13,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:35:13,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531238168] [2024-06-21 20:35:13,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531238168] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:35:13,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:35:13,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:35:13,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820458405] [2024-06-21 20:35:13,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:35:13,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:35:13,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:35:13,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:35:13,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:35:13,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:35:13,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 422 transitions, 5010 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 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) [2024-06-21 20:35:13,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:35:13,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:35:13,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:35:14,408 INFO L124 PetriNetUnfolderBase]: 3480/5689 cut-off events. [2024-06-21 20:35:14,409 INFO L125 PetriNetUnfolderBase]: For 930438/930444 co-relation queries the response was YES. [2024-06-21 20:35:14,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57215 conditions, 5689 events. 3480/5689 cut-off events. For 930438/930444 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 35763 event pairs, 747 based on Foata normal form. 7/5693 useless extension candidates. Maximal degree in co-relation 57060. Up to 5299 conditions per place. [2024-06-21 20:35:14,497 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 390 selfloop transitions, 44 changer transitions 0/439 dead transitions. [2024-06-21 20:35:14,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 439 transitions, 6012 flow [2024-06-21 20:35:14,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:35:14,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:35:14,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-21 20:35:14,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3994708994708995 [2024-06-21 20:35:14,498 INFO L175 Difference]: Start difference. First operand has 332 places, 422 transitions, 5010 flow. Second operand 9 states and 151 transitions. [2024-06-21 20:35:14,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 439 transitions, 6012 flow [2024-06-21 20:35:16,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 439 transitions, 5786 flow, removed 63 selfloop flow, removed 5 redundant places. [2024-06-21 20:35:16,835 INFO L231 Difference]: Finished difference. Result has 336 places, 425 transitions, 4976 flow [2024-06-21 20:35:16,835 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4784, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4976, PETRI_PLACES=336, PETRI_TRANSITIONS=425} [2024-06-21 20:35:16,836 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 293 predicate places. [2024-06-21 20:35:16,836 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 425 transitions, 4976 flow [2024-06-21 20:35:16,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 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) [2024-06-21 20:35:16,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:35:16,836 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:35:16,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-21 20:35:16,836 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:35:16,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:35:16,837 INFO L85 PathProgramCache]: Analyzing trace with hash 1612432053, now seen corresponding path program 6 times [2024-06-21 20:35:16,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:35:16,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127411537] [2024-06-21 20:35:16,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:35:16,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:35:16,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:35:18,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:35:18,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:35:18,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127411537] [2024-06-21 20:35:18,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127411537] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:35:18,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:35:18,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:35:18,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906083917] [2024-06-21 20:35:18,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:35:18,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:35:18,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:35:18,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:35:18,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:35:18,122 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:35:18,122 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 425 transitions, 4976 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 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) [2024-06-21 20:35:18,122 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:35:18,122 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:35:18,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:35:19,385 INFO L124 PetriNetUnfolderBase]: 3485/5696 cut-off events. [2024-06-21 20:35:19,386 INFO L125 PetriNetUnfolderBase]: For 945221/945227 co-relation queries the response was YES. [2024-06-21 20:35:19,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57575 conditions, 5696 events. 3485/5696 cut-off events. For 945221/945227 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 35778 event pairs, 743 based on Foata normal form. 7/5700 useless extension candidates. Maximal degree in co-relation 57419. Up to 5292 conditions per place. [2024-06-21 20:35:19,480 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 387 selfloop transitions, 53 changer transitions 0/445 dead transitions. [2024-06-21 20:35:19,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 445 transitions, 6031 flow [2024-06-21 20:35:19,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:35:19,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:35:19,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-21 20:35:19,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-21 20:35:19,482 INFO L175 Difference]: Start difference. First operand has 336 places, 425 transitions, 4976 flow. Second operand 8 states and 140 transitions. [2024-06-21 20:35:19,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 445 transitions, 6031 flow [2024-06-21 20:35:21,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 445 transitions, 5861 flow, removed 43 selfloop flow, removed 7 redundant places. [2024-06-21 20:35:21,675 INFO L231 Difference]: Finished difference. Result has 338 places, 431 transitions, 5078 flow [2024-06-21 20:35:21,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4806, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5078, PETRI_PLACES=338, PETRI_TRANSITIONS=431} [2024-06-21 20:35:21,675 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 295 predicate places. [2024-06-21 20:35:21,675 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 431 transitions, 5078 flow [2024-06-21 20:35:21,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 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) [2024-06-21 20:35:21,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:35:21,676 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:35:21,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-21 20:35:21,676 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:35:21,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:35:21,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1611986180, now seen corresponding path program 9 times [2024-06-21 20:35:21,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:35:21,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993121240] [2024-06-21 20:35:21,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:35:21,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:35:21,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:35:22,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:35:22,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:35:22,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993121240] [2024-06-21 20:35:22,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993121240] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:35:22,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:35:22,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:35:22,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401672823] [2024-06-21 20:35:22,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:35:22,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:35:22,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:35:22,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:35:22,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:35:22,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:35:22,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 431 transitions, 5078 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:35:22,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:35:22,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:35:22,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:35:24,145 INFO L124 PetriNetUnfolderBase]: 3490/5701 cut-off events. [2024-06-21 20:35:24,145 INFO L125 PetriNetUnfolderBase]: For 965761/965761 co-relation queries the response was YES. [2024-06-21 20:35:24,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58139 conditions, 5701 events. 3490/5701 cut-off events. For 965761/965761 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 35785 event pairs, 751 based on Foata normal form. 1/5698 useless extension candidates. Maximal degree in co-relation 57981. Up to 5192 conditions per place. [2024-06-21 20:35:24,236 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 359 selfloop transitions, 84 changer transitions 0/448 dead transitions. [2024-06-21 20:35:24,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 448 transitions, 6340 flow [2024-06-21 20:35:24,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:35:24,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:35:24,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-21 20:35:24,237 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-21 20:35:24,237 INFO L175 Difference]: Start difference. First operand has 338 places, 431 transitions, 5078 flow. Second operand 8 states and 143 transitions. [2024-06-21 20:35:24,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 448 transitions, 6340 flow [2024-06-21 20:35:26,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 448 transitions, 6193 flow, removed 50 selfloop flow, removed 4 redundant places. [2024-06-21 20:35:26,530 INFO L231 Difference]: Finished difference. Result has 342 places, 434 transitions, 5243 flow [2024-06-21 20:35:26,531 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4931, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=431, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5243, PETRI_PLACES=342, PETRI_TRANSITIONS=434} [2024-06-21 20:35:26,531 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 299 predicate places. [2024-06-21 20:35:26,531 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 434 transitions, 5243 flow [2024-06-21 20:35:26,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:35:26,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:35:26,531 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:35:26,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-21 20:35:26,532 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:35:26,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:35:26,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1611986366, now seen corresponding path program 9 times [2024-06-21 20:35:26,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:35:26,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034416723] [2024-06-21 20:35:26,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:35:26,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:35:26,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:35:27,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:35:27,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:35:27,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034416723] [2024-06-21 20:35:27,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034416723] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:35:27,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:35:27,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:35:27,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698679137] [2024-06-21 20:35:27,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:35:27,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:35:27,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:35:27,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:35:27,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:35:27,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:35:27,551 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 434 transitions, 5243 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 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) [2024-06-21 20:35:27,551 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:35:27,551 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:35:27,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:35:28,981 INFO L124 PetriNetUnfolderBase]: 3484/5697 cut-off events. [2024-06-21 20:35:28,982 INFO L125 PetriNetUnfolderBase]: For 981748/981754 co-relation queries the response was YES. [2024-06-21 20:35:29,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58476 conditions, 5697 events. 3484/5697 cut-off events. For 981748/981754 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 35835 event pairs, 740 based on Foata normal form. 8/5702 useless extension candidates. Maximal degree in co-relation 58316. Up to 5184 conditions per place. [2024-06-21 20:35:29,063 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 365 selfloop transitions, 82 changer transitions 0/452 dead transitions. [2024-06-21 20:35:29,064 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 452 transitions, 6455 flow [2024-06-21 20:35:29,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:35:29,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:35:29,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-21 20:35:29,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-21 20:35:29,065 INFO L175 Difference]: Start difference. First operand has 342 places, 434 transitions, 5243 flow. Second operand 8 states and 146 transitions. [2024-06-21 20:35:29,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 452 transitions, 6455 flow [2024-06-21 20:35:30,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 452 transitions, 6165 flow, removed 63 selfloop flow, removed 6 redundant places. [2024-06-21 20:35:30,792 INFO L231 Difference]: Finished difference. Result has 344 places, 434 transitions, 5123 flow [2024-06-21 20:35:30,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4953, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=434, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=352, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5123, PETRI_PLACES=344, PETRI_TRANSITIONS=434} [2024-06-21 20:35:30,793 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 301 predicate places. [2024-06-21 20:35:30,793 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 434 transitions, 5123 flow [2024-06-21 20:35:30,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 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) [2024-06-21 20:35:30,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:35:30,793 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:35:30,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-21 20:35:30,794 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:35:30,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:35:30,794 INFO L85 PathProgramCache]: Analyzing trace with hash -1657283556, now seen corresponding path program 10 times [2024-06-21 20:35:30,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:35:30,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012735688] [2024-06-21 20:35:30,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:35:30,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:35:30,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:35:31,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:35:31,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:35:31,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012735688] [2024-06-21 20:35:31,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012735688] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:35:31,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:35:31,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:35:31,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536963985] [2024-06-21 20:35:31,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:35:31,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:35:31,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:35:31,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:35:31,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:35:31,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:35:31,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 434 transitions, 5123 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 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) [2024-06-21 20:35:31,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:35:31,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:35:31,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:35:33,096 INFO L124 PetriNetUnfolderBase]: 3502/5727 cut-off events. [2024-06-21 20:35:33,096 INFO L125 PetriNetUnfolderBase]: For 1005092/1005100 co-relation queries the response was YES. [2024-06-21 20:35:33,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59124 conditions, 5727 events. 3502/5727 cut-off events. For 1005092/1005100 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 36106 event pairs, 781 based on Foata normal form. 8/5732 useless extension candidates. Maximal degree in co-relation 58963. Up to 5150 conditions per place. [2024-06-21 20:35:33,194 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 343 selfloop transitions, 108 changer transitions 0/456 dead transitions. [2024-06-21 20:35:33,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 456 transitions, 6807 flow [2024-06-21 20:35:33,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:35:33,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:35:33,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-21 20:35:33,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-21 20:35:33,196 INFO L175 Difference]: Start difference. First operand has 344 places, 434 transitions, 5123 flow. Second operand 8 states and 146 transitions. [2024-06-21 20:35:33,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 456 transitions, 6807 flow [2024-06-21 20:35:35,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 456 transitions, 6603 flow, removed 44 selfloop flow, removed 5 redundant places. [2024-06-21 20:35:35,472 INFO L231 Difference]: Finished difference. Result has 347 places, 440 transitions, 5407 flow [2024-06-21 20:35:35,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4919, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=434, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5407, PETRI_PLACES=347, PETRI_TRANSITIONS=440} [2024-06-21 20:35:35,472 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 304 predicate places. [2024-06-21 20:35:35,472 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 440 transitions, 5407 flow [2024-06-21 20:35:35,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 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) [2024-06-21 20:35:35,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:35:35,473 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:35:35,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-21 20:35:35,473 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:35:35,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:35:35,474 INFO L85 PathProgramCache]: Analyzing trace with hash 796563072, now seen corresponding path program 10 times [2024-06-21 20:35:35,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:35:35,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656146424] [2024-06-21 20:35:35,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:35:35,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:35:35,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:35:36,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:35:36,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:35:36,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656146424] [2024-06-21 20:35:36,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656146424] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:35:36,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:35:36,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:35:36,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133949158] [2024-06-21 20:35:36,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:35:36,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:35:36,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:35:36,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:35:36,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:35:36,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:35:36,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 440 transitions, 5407 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 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) [2024-06-21 20:35:36,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:35:36,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:35:36,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:35:37,826 INFO L124 PetriNetUnfolderBase]: 3507/5734 cut-off events. [2024-06-21 20:35:37,827 INFO L125 PetriNetUnfolderBase]: For 1024247/1024249 co-relation queries the response was YES. [2024-06-21 20:35:37,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59803 conditions, 5734 events. 3507/5734 cut-off events. For 1024247/1024249 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 36144 event pairs, 793 based on Foata normal form. 3/5733 useless extension candidates. Maximal degree in co-relation 59641. Up to 5145 conditions per place. [2024-06-21 20:35:37,916 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 329 selfloop transitions, 124 changer transitions 0/458 dead transitions. [2024-06-21 20:35:37,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 458 transitions, 7047 flow [2024-06-21 20:35:37,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:35:37,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:35:37,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-21 20:35:37,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-06-21 20:35:37,918 INFO L175 Difference]: Start difference. First operand has 347 places, 440 transitions, 5407 flow. Second operand 9 states and 156 transitions. [2024-06-21 20:35:37,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 458 transitions, 7047 flow [2024-06-21 20:35:40,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 458 transitions, 6715 flow, removed 77 selfloop flow, removed 5 redundant places. [2024-06-21 20:35:40,295 INFO L231 Difference]: Finished difference. Result has 351 places, 446 transitions, 5615 flow [2024-06-21 20:35:40,295 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5083, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=440, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5615, PETRI_PLACES=351, PETRI_TRANSITIONS=446} [2024-06-21 20:35:40,296 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 308 predicate places. [2024-06-21 20:35:40,296 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 446 transitions, 5615 flow [2024-06-21 20:35:40,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 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) [2024-06-21 20:35:40,296 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:35:40,296 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:35:40,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-21 20:35:40,296 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:35:40,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:35:40,297 INFO L85 PathProgramCache]: Analyzing trace with hash 804700975, now seen corresponding path program 7 times [2024-06-21 20:35:40,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:35:40,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127824701] [2024-06-21 20:35:40,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:35:40,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:35:40,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:35:41,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:35:41,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:35:41,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127824701] [2024-06-21 20:35:41,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127824701] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:35:41,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:35:41,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:35:41,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903317550] [2024-06-21 20:35:41,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:35:41,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:35:41,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:35:41,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:35:41,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:35:41,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:35:41,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 446 transitions, 5615 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 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) [2024-06-21 20:35:41,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:35:41,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:35:41,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:35:42,927 INFO L124 PetriNetUnfolderBase]: 3520/5752 cut-off events. [2024-06-21 20:35:42,928 INFO L125 PetriNetUnfolderBase]: For 1036654/1036662 co-relation queries the response was YES. [2024-06-21 20:35:42,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59645 conditions, 5752 events. 3520/5752 cut-off events. For 1036654/1036662 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 36276 event pairs, 757 based on Foata normal form. 9/5758 useless extension candidates. Maximal degree in co-relation 59482. Up to 5270 conditions per place. [2024-06-21 20:35:43,016 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 378 selfloop transitions, 93 changer transitions 0/476 dead transitions. [2024-06-21 20:35:43,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 476 transitions, 7400 flow [2024-06-21 20:35:43,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:35:43,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:35:43,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-21 20:35:43,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-21 20:35:43,018 INFO L175 Difference]: Start difference. First operand has 351 places, 446 transitions, 5615 flow. Second operand 8 states and 142 transitions. [2024-06-21 20:35:43,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 476 transitions, 7400 flow [2024-06-21 20:35:45,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 476 transitions, 7120 flow, removed 77 selfloop flow, removed 5 redundant places. [2024-06-21 20:35:45,021 INFO L231 Difference]: Finished difference. Result has 356 places, 462 transitions, 5975 flow [2024-06-21 20:35:45,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5341, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=446, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5975, PETRI_PLACES=356, PETRI_TRANSITIONS=462} [2024-06-21 20:35:45,021 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 313 predicate places. [2024-06-21 20:35:45,021 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 462 transitions, 5975 flow [2024-06-21 20:35:45,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 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) [2024-06-21 20:35:45,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:35:45,022 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:35:45,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-21 20:35:45,022 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:35:45,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:35:45,023 INFO L85 PathProgramCache]: Analyzing trace with hash -1400574509, now seen corresponding path program 8 times [2024-06-21 20:35:45,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:35:45,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376439859] [2024-06-21 20:35:45,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:35:45,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:35:45,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:35:46,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:35:46,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:35:46,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376439859] [2024-06-21 20:35:46,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376439859] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:35:46,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:35:46,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:35:46,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062865332] [2024-06-21 20:35:46,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:35:46,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:35:46,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:35:46,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:35:46,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:35:46,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:35:46,183 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 462 transitions, 5975 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 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) [2024-06-21 20:35:46,183 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:35:46,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:35:46,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:35:47,495 INFO L124 PetriNetUnfolderBase]: 3533/5776 cut-off events. [2024-06-21 20:35:47,496 INFO L125 PetriNetUnfolderBase]: For 1057085/1057093 co-relation queries the response was YES. [2024-06-21 20:35:47,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60303 conditions, 5776 events. 3533/5776 cut-off events. For 1057085/1057093 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 36445 event pairs, 757 based on Foata normal form. 9/5782 useless extension candidates. Maximal degree in co-relation 60136. Up to 5285 conditions per place. [2024-06-21 20:35:47,586 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 378 selfloop transitions, 99 changer transitions 0/482 dead transitions. [2024-06-21 20:35:47,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 482 transitions, 7629 flow [2024-06-21 20:35:47,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:35:47,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:35:47,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-21 20:35:47,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-21 20:35:47,587 INFO L175 Difference]: Start difference. First operand has 356 places, 462 transitions, 5975 flow. Second operand 8 states and 142 transitions. [2024-06-21 20:35:47,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 482 transitions, 7629 flow [2024-06-21 20:35:49,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 482 transitions, 7400 flow, removed 84 selfloop flow, removed 3 redundant places. [2024-06-21 20:35:49,837 INFO L231 Difference]: Finished difference. Result has 362 places, 469 transitions, 6230 flow [2024-06-21 20:35:49,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5780, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=369, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6230, PETRI_PLACES=362, PETRI_TRANSITIONS=469} [2024-06-21 20:35:49,838 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 319 predicate places. [2024-06-21 20:35:49,838 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 469 transitions, 6230 flow [2024-06-21 20:35:49,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 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) [2024-06-21 20:35:49,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:35:49,838 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:35:49,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-21 20:35:49,839 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:35:49,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:35:49,839 INFO L85 PathProgramCache]: Analyzing trace with hash 473609015, now seen corresponding path program 9 times [2024-06-21 20:35:49,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:35:49,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102106234] [2024-06-21 20:35:49,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:35:49,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:35:49,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:35:50,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:35:50,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:35:50,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102106234] [2024-06-21 20:35:50,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102106234] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:35:50,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:35:50,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:35:50,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914835615] [2024-06-21 20:35:50,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:35:50,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:35:50,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:35:50,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:35:50,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:35:51,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:35:51,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 469 transitions, 6230 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 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) [2024-06-21 20:35:51,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:35:51,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:35:51,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:35:52,303 INFO L124 PetriNetUnfolderBase]: 3530/5770 cut-off events. [2024-06-21 20:35:52,304 INFO L125 PetriNetUnfolderBase]: For 1066011/1066019 co-relation queries the response was YES. [2024-06-21 20:35:52,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60321 conditions, 5770 events. 3530/5770 cut-off events. For 1066011/1066019 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 36416 event pairs, 753 based on Foata normal form. 9/5776 useless extension candidates. Maximal degree in co-relation 60151. Up to 5329 conditions per place. [2024-06-21 20:35:52,397 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 411 selfloop transitions, 67 changer transitions 0/483 dead transitions. [2024-06-21 20:35:52,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 483 transitions, 7512 flow [2024-06-21 20:35:52,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:35:52,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:35:52,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-21 20:35:52,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-21 20:35:52,399 INFO L175 Difference]: Start difference. First operand has 362 places, 469 transitions, 6230 flow. Second operand 8 states and 140 transitions. [2024-06-21 20:35:52,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 483 transitions, 7512 flow [2024-06-21 20:35:55,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 483 transitions, 7199 flow, removed 89 selfloop flow, removed 4 redundant places. [2024-06-21 20:35:55,634 INFO L231 Difference]: Finished difference. Result has 367 places, 471 transitions, 6147 flow [2024-06-21 20:35:55,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5945, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=469, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6147, PETRI_PLACES=367, PETRI_TRANSITIONS=471} [2024-06-21 20:35:55,634 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 324 predicate places. [2024-06-21 20:35:55,634 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 471 transitions, 6147 flow [2024-06-21 20:35:55,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 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) [2024-06-21 20:35:55,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:35:55,635 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:35:55,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-21 20:35:55,635 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:35:55,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:35:55,635 INFO L85 PathProgramCache]: Analyzing trace with hash -1657520489, now seen corresponding path program 10 times [2024-06-21 20:35:55,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:35:55,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496574220] [2024-06-21 20:35:55,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:35:55,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:35:55,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:35:56,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:35:56,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:35:56,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496574220] [2024-06-21 20:35:56,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496574220] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:35:56,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:35:56,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:35:56,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006751960] [2024-06-21 20:35:56,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:35:56,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:35:56,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:35:56,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:35:56,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:35:56,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:35:56,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 471 transitions, 6147 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 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) [2024-06-21 20:35:56,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:35:56,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:35:56,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:35:58,114 INFO L124 PetriNetUnfolderBase]: 3535/5779 cut-off events. [2024-06-21 20:35:58,114 INFO L125 PetriNetUnfolderBase]: For 1082986/1082994 co-relation queries the response was YES. [2024-06-21 20:35:58,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60428 conditions, 5779 events. 3535/5779 cut-off events. For 1082986/1082994 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 36457 event pairs, 753 based on Foata normal form. 9/5785 useless extension candidates. Maximal degree in co-relation 60256. Up to 5348 conditions per place. [2024-06-21 20:35:58,206 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 420 selfloop transitions, 60 changer transitions 0/485 dead transitions. [2024-06-21 20:35:58,206 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 485 transitions, 7253 flow [2024-06-21 20:35:58,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:35:58,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:35:58,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-21 20:35:58,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-21 20:35:58,207 INFO L175 Difference]: Start difference. First operand has 367 places, 471 transitions, 6147 flow. Second operand 8 states and 138 transitions. [2024-06-21 20:35:58,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 485 transitions, 7253 flow [2024-06-21 20:36:01,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 485 transitions, 7078 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-21 20:36:01,673 INFO L231 Difference]: Finished difference. Result has 369 places, 474 transitions, 6218 flow [2024-06-21 20:36:01,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5979, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=471, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=411, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6218, PETRI_PLACES=369, PETRI_TRANSITIONS=474} [2024-06-21 20:36:01,673 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 326 predicate places. [2024-06-21 20:36:01,674 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 474 transitions, 6218 flow [2024-06-21 20:36:01,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 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) [2024-06-21 20:36:01,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:36:01,674 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:36:01,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-21 20:36:01,674 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:36:01,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:36:01,675 INFO L85 PathProgramCache]: Analyzing trace with hash 473163328, now seen corresponding path program 11 times [2024-06-21 20:36:01,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:36:01,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155884403] [2024-06-21 20:36:01,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:36:01,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:36:01,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:36:02,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:36:02,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:36:02,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155884403] [2024-06-21 20:36:02,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155884403] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:36:02,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:36:02,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:36:02,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199229464] [2024-06-21 20:36:02,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:36:02,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:36:02,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:36:02,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:36:02,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:36:02,668 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:36:02,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 474 transitions, 6218 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 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) [2024-06-21 20:36:02,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:36:02,669 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:36:02,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:36:04,027 INFO L124 PetriNetUnfolderBase]: 3545/5793 cut-off events. [2024-06-21 20:36:04,027 INFO L125 PetriNetUnfolderBase]: For 1108010/1108018 co-relation queries the response was YES. [2024-06-21 20:36:04,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60703 conditions, 5793 events. 3545/5793 cut-off events. For 1108010/1108018 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 36604 event pairs, 771 based on Foata normal form. 8/5798 useless extension candidates. Maximal degree in co-relation 60531. Up to 5206 conditions per place. [2024-06-21 20:36:04,123 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 380 selfloop transitions, 109 changer transitions 0/494 dead transitions. [2024-06-21 20:36:04,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 494 transitions, 7880 flow [2024-06-21 20:36:04,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:36:04,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:36:04,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-21 20:36:04,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-21 20:36:04,124 INFO L175 Difference]: Start difference. First operand has 369 places, 474 transitions, 6218 flow. Second operand 8 states and 148 transitions. [2024-06-21 20:36:04,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 494 transitions, 7880 flow [2024-06-21 20:36:07,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 494 transitions, 7684 flow, removed 40 selfloop flow, removed 6 redundant places. [2024-06-21 20:36:07,055 INFO L231 Difference]: Finished difference. Result has 371 places, 477 transitions, 6362 flow [2024-06-21 20:36:07,056 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6022, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=474, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6362, PETRI_PLACES=371, PETRI_TRANSITIONS=477} [2024-06-21 20:36:07,056 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 328 predicate places. [2024-06-21 20:36:07,056 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 477 transitions, 6362 flow [2024-06-21 20:36:07,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 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) [2024-06-21 20:36:07,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:36:07,057 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:36:07,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-21 20:36:07,057 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:36:07,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:36:07,057 INFO L85 PathProgramCache]: Analyzing trace with hash -1834385099, now seen corresponding path program 11 times [2024-06-21 20:36:07,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:36:07,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162045815] [2024-06-21 20:36:07,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:36:07,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:36:07,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:36:08,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:36:08,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:36:08,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162045815] [2024-06-21 20:36:08,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162045815] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:36:08,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:36:08,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:36:08,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464782922] [2024-06-21 20:36:08,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:36:08,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:36:08,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:36:08,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:36:08,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:36:08,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:36:08,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 477 transitions, 6362 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 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) [2024-06-21 20:36:08,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:36:08,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:36:08,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:36:09,467 INFO L124 PetriNetUnfolderBase]: 3542/5787 cut-off events. [2024-06-21 20:36:09,467 INFO L125 PetriNetUnfolderBase]: For 1114283/1114291 co-relation queries the response was YES. [2024-06-21 20:36:09,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60818 conditions, 5787 events. 3542/5787 cut-off events. For 1114283/1114291 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 36505 event pairs, 753 based on Foata normal form. 9/5793 useless extension candidates. Maximal degree in co-relation 60645. Up to 5345 conditions per place. [2024-06-21 20:36:09,562 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 416 selfloop transitions, 70 changer transitions 0/491 dead transitions. [2024-06-21 20:36:09,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 491 transitions, 7629 flow [2024-06-21 20:36:09,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:36:09,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:36:09,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-21 20:36:09,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-21 20:36:09,563 INFO L175 Difference]: Start difference. First operand has 371 places, 477 transitions, 6362 flow. Second operand 8 states and 140 transitions. [2024-06-21 20:36:09,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 491 transitions, 7629 flow [2024-06-21 20:36:12,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 491 transitions, 7258 flow, removed 88 selfloop flow, removed 5 redundant places. [2024-06-21 20:36:12,946 INFO L231 Difference]: Finished difference. Result has 375 places, 479 transitions, 6194 flow [2024-06-21 20:36:12,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5999, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=477, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=407, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6194, PETRI_PLACES=375, PETRI_TRANSITIONS=479} [2024-06-21 20:36:12,947 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 332 predicate places. [2024-06-21 20:36:12,947 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 479 transitions, 6194 flow [2024-06-21 20:36:12,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 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) [2024-06-21 20:36:12,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:36:12,947 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:36:12,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-21 20:36:12,947 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:36:12,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:36:12,948 INFO L85 PathProgramCache]: Analyzing trace with hash 295911652, now seen corresponding path program 11 times [2024-06-21 20:36:12,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:36:12,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711258592] [2024-06-21 20:36:12,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:36:12,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:36:12,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:36:14,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:36:14,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:36:14,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711258592] [2024-06-21 20:36:14,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711258592] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:36:14,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:36:14,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:36:14,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312285571] [2024-06-21 20:36:14,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:36:14,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:36:14,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:36:14,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:36:14,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:36:14,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:36:14,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 479 transitions, 6194 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:36:14,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:36:14,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:36:14,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:36:15,601 INFO L124 PetriNetUnfolderBase]: 3547/5789 cut-off events. [2024-06-21 20:36:15,601 INFO L125 PetriNetUnfolderBase]: For 1130021/1130021 co-relation queries the response was YES. [2024-06-21 20:36:15,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60752 conditions, 5789 events. 3547/5789 cut-off events. For 1130021/1130021 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 36394 event pairs, 745 based on Foata normal form. 1/5786 useless extension candidates. Maximal degree in co-relation 60577. Up to 5374 conditions per place. [2024-06-21 20:36:15,697 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 430 selfloop transitions, 57 changer transitions 0/492 dead transitions. [2024-06-21 20:36:15,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 492 transitions, 7324 flow [2024-06-21 20:36:15,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:36:15,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:36:15,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-21 20:36:15,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968253968253968 [2024-06-21 20:36:15,699 INFO L175 Difference]: Start difference. First operand has 375 places, 479 transitions, 6194 flow. Second operand 9 states and 150 transitions. [2024-06-21 20:36:15,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 492 transitions, 7324 flow [2024-06-21 20:36:18,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 492 transitions, 7188 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-21 20:36:18,575 INFO L231 Difference]: Finished difference. Result has 379 places, 482 transitions, 6314 flow [2024-06-21 20:36:18,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6058, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=422, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6314, PETRI_PLACES=379, PETRI_TRANSITIONS=482} [2024-06-21 20:36:18,576 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 336 predicate places. [2024-06-21 20:36:18,576 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 482 transitions, 6314 flow [2024-06-21 20:36:18,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:36:18,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:36:18,576 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:36:18,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-21 20:36:18,576 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:36:18,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:36:18,577 INFO L85 PathProgramCache]: Analyzing trace with hash -398437293, now seen corresponding path program 12 times [2024-06-21 20:36:18,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:36:18,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468891532] [2024-06-21 20:36:18,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:36:18,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:36:18,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:36:19,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:36:19,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:36:19,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468891532] [2024-06-21 20:36:19,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468891532] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:36:19,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:36:19,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:36:19,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847394770] [2024-06-21 20:36:19,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:36:19,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:36:19,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:36:19,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:36:19,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:36:19,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:36:19,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 482 transitions, 6314 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 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) [2024-06-21 20:36:19,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:36:19,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:36:19,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:36:21,152 INFO L124 PetriNetUnfolderBase]: 3544/5792 cut-off events. [2024-06-21 20:36:21,152 INFO L125 PetriNetUnfolderBase]: For 1141872/1141880 co-relation queries the response was YES. [2024-06-21 20:36:21,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60724 conditions, 5792 events. 3544/5792 cut-off events. For 1141872/1141880 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 36620 event pairs, 753 based on Foata normal form. 9/5798 useless extension candidates. Maximal degree in co-relation 60548. Up to 5361 conditions per place. [2024-06-21 20:36:21,246 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 429 selfloop transitions, 59 changer transitions 0/493 dead transitions. [2024-06-21 20:36:21,246 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 493 transitions, 7322 flow [2024-06-21 20:36:21,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:36:21,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:36:21,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-21 20:36:21,247 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-21 20:36:21,247 INFO L175 Difference]: Start difference. First operand has 379 places, 482 transitions, 6314 flow. Second operand 8 states and 138 transitions. [2024-06-21 20:36:21,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 493 transitions, 7322 flow [2024-06-21 20:36:24,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 493 transitions, 6925 flow, removed 116 selfloop flow, removed 9 redundant places. [2024-06-21 20:36:24,661 INFO L231 Difference]: Finished difference. Result has 378 places, 482 transitions, 6041 flow [2024-06-21 20:36:24,661 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5917, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=423, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6041, PETRI_PLACES=378, PETRI_TRANSITIONS=482} [2024-06-21 20:36:24,661 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 335 predicate places. [2024-06-21 20:36:24,661 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 482 transitions, 6041 flow [2024-06-21 20:36:24,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 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) [2024-06-21 20:36:24,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:36:24,662 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:36:24,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-21 20:36:24,662 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:36:24,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:36:24,662 INFO L85 PathProgramCache]: Analyzing trace with hash 296031622, now seen corresponding path program 12 times [2024-06-21 20:36:24,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:36:24,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142146886] [2024-06-21 20:36:24,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:36:24,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:36:24,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:36:25,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:36:25,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:36:25,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142146886] [2024-06-21 20:36:25,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142146886] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:36:25,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:36:25,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:36:25,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551128425] [2024-06-21 20:36:25,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:36:25,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:36:25,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:36:25,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:36:25,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:36:25,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:36:25,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 482 transitions, 6041 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:36:25,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:36:25,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:36:25,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:36:27,188 INFO L124 PetriNetUnfolderBase]: 3541/5786 cut-off events. [2024-06-21 20:36:27,189 INFO L125 PetriNetUnfolderBase]: For 1151166/1151168 co-relation queries the response was YES. [2024-06-21 20:36:27,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60439 conditions, 5786 events. 3541/5786 cut-off events. For 1151166/1151168 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 36552 event pairs, 783 based on Foata normal form. 3/5785 useless extension candidates. Maximal degree in co-relation 60263. Up to 5193 conditions per place. [2024-06-21 20:36:27,285 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 369 selfloop transitions, 119 changer transitions 0/493 dead transitions. [2024-06-21 20:36:27,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 493 transitions, 7275 flow [2024-06-21 20:36:27,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:36:27,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:36:27,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-21 20:36:27,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-21 20:36:27,287 INFO L175 Difference]: Start difference. First operand has 378 places, 482 transitions, 6041 flow. Second operand 8 states and 143 transitions. [2024-06-21 20:36:27,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 493 transitions, 7275 flow [2024-06-21 20:36:29,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 493 transitions, 7055 flow, removed 53 selfloop flow, removed 6 redundant places. [2024-06-21 20:36:29,909 INFO L231 Difference]: Finished difference. Result has 380 places, 482 transitions, 6065 flow [2024-06-21 20:36:29,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5821, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6065, PETRI_PLACES=380, PETRI_TRANSITIONS=482} [2024-06-21 20:36:29,909 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 337 predicate places. [2024-06-21 20:36:29,909 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 482 transitions, 6065 flow [2024-06-21 20:36:29,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:36:29,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:36:29,910 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:36:29,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-21 20:36:29,910 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:36:29,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:36:29,910 INFO L85 PathProgramCache]: Analyzing trace with hash -1834652226, now seen corresponding path program 12 times [2024-06-21 20:36:29,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:36:29,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306079125] [2024-06-21 20:36:29,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:36:29,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:36:29,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:36:30,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:36:30,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:36:30,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306079125] [2024-06-21 20:36:30,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306079125] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:36:30,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:36:30,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:36:30,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743693621] [2024-06-21 20:36:30,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:36:30,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:36:30,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:36:30,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:36:30,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:36:31,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:36:31,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 482 transitions, 6065 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 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) [2024-06-21 20:36:31,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:36:31,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:36:31,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:36:32,362 INFO L124 PetriNetUnfolderBase]: 3535/5780 cut-off events. [2024-06-21 20:36:32,362 INFO L125 PetriNetUnfolderBase]: For 1161475/1161483 co-relation queries the response was YES. [2024-06-21 20:36:32,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60305 conditions, 5780 events. 3535/5780 cut-off events. For 1161475/1161483 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 36504 event pairs, 766 based on Foata normal form. 8/5785 useless extension candidates. Maximal degree in co-relation 60128. Up to 5196 conditions per place. [2024-06-21 20:36:32,454 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 382 selfloop transitions, 110 changer transitions 0/497 dead transitions. [2024-06-21 20:36:32,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 497 transitions, 7381 flow [2024-06-21 20:36:32,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:36:32,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:36:32,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-21 20:36:32,456 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-21 20:36:32,456 INFO L175 Difference]: Start difference. First operand has 380 places, 482 transitions, 6065 flow. Second operand 8 states and 145 transitions. [2024-06-21 20:36:32,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 497 transitions, 7381 flow [2024-06-21 20:36:35,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 497 transitions, 6939 flow, removed 54 selfloop flow, removed 8 redundant places. [2024-06-21 20:36:35,729 INFO L231 Difference]: Finished difference. Result has 380 places, 482 transitions, 5849 flow [2024-06-21 20:36:35,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5623, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5849, PETRI_PLACES=380, PETRI_TRANSITIONS=482} [2024-06-21 20:36:35,730 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 337 predicate places. [2024-06-21 20:36:35,730 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 482 transitions, 5849 flow [2024-06-21 20:36:35,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 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) [2024-06-21 20:36:35,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:36:35,731 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:36:35,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-21 20:36:35,731 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:36:35,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:36:35,731 INFO L85 PathProgramCache]: Analyzing trace with hash -1834775358, now seen corresponding path program 4 times [2024-06-21 20:36:35,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:36:35,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121287682] [2024-06-21 20:36:35,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:36:35,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:36:35,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:36:36,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:36:36,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:36:36,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121287682] [2024-06-21 20:36:36,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121287682] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:36:36,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:36:36,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:36:36,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653353098] [2024-06-21 20:36:36,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:36:36,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:36:36,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:36:36,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:36:36,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:36:36,870 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 20:36:36,870 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 482 transitions, 5849 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-21 20:36:36,870 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:36:36,870 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 20:36:36,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:36:38,267 INFO L124 PetriNetUnfolderBase]: 3423/5639 cut-off events. [2024-06-21 20:36:38,267 INFO L125 PetriNetUnfolderBase]: For 1174083/1174083 co-relation queries the response was YES. [2024-06-21 20:36:38,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59158 conditions, 5639 events. 3423/5639 cut-off events. For 1174083/1174083 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 35963 event pairs, 728 based on Foata normal form. 2/5601 useless extension candidates. Maximal degree in co-relation 58981. Up to 5031 conditions per place. [2024-06-21 20:36:38,360 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 383 selfloop transitions, 53 changer transitions 0/495 dead transitions. [2024-06-21 20:36:38,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 495 transitions, 6835 flow [2024-06-21 20:36:38,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:36:38,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:36:38,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-21 20:36:38,362 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 20:36:38,362 INFO L175 Difference]: Start difference. First operand has 380 places, 482 transitions, 5849 flow. Second operand 8 states and 144 transitions. [2024-06-21 20:36:38,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 495 transitions, 6835 flow [2024-06-21 20:36:41,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 495 transitions, 6512 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-21 20:36:41,833 INFO L231 Difference]: Finished difference. Result has 379 places, 484 transitions, 5727 flow [2024-06-21 20:36:41,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5526, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=429, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5727, PETRI_PLACES=379, PETRI_TRANSITIONS=484} [2024-06-21 20:36:41,833 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 336 predicate places. [2024-06-21 20:36:41,834 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 484 transitions, 5727 flow [2024-06-21 20:36:41,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-21 20:36:41,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:36:41,834 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:36:41,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-21 20:36:41,834 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:36:41,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:36:41,834 INFO L85 PathProgramCache]: Analyzing trace with hash -544319860, now seen corresponding path program 13 times [2024-06-21 20:36:41,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:36:41,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891963253] [2024-06-21 20:36:41,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:36:41,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:36:41,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:36:42,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:36:42,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:36:42,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891963253] [2024-06-21 20:36:42,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891963253] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:36:42,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:36:42,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:36:42,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864626742] [2024-06-21 20:36:42,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:36:42,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:36:42,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:36:42,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:36:42,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:36:42,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:36:42,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 484 transitions, 5727 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:36:42,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:36:42,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:36:42,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:36:44,485 INFO L124 PetriNetUnfolderBase]: 3588/5860 cut-off events. [2024-06-21 20:36:44,485 INFO L125 PetriNetUnfolderBase]: For 1188055/1188059 co-relation queries the response was YES. [2024-06-21 20:36:44,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60455 conditions, 5860 events. 3588/5860 cut-off events. For 1188055/1188059 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 36988 event pairs, 737 based on Foata normal form. 5/5863 useless extension candidates. Maximal degree in co-relation 60278. Up to 5416 conditions per place. [2024-06-21 20:36:44,579 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 466 selfloop transitions, 69 changer transitions 0/540 dead transitions. [2024-06-21 20:36:44,579 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 540 transitions, 7223 flow [2024-06-21 20:36:44,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:36:44,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:36:44,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 198 transitions. [2024-06-21 20:36:44,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 20:36:44,581 INFO L175 Difference]: Start difference. First operand has 379 places, 484 transitions, 5727 flow. Second operand 11 states and 198 transitions. [2024-06-21 20:36:44,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 540 transitions, 7223 flow [2024-06-21 20:36:48,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 540 transitions, 7032 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-06-21 20:36:48,058 INFO L231 Difference]: Finished difference. Result has 386 places, 508 transitions, 6065 flow [2024-06-21 20:36:48,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5542, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=484, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6065, PETRI_PLACES=386, PETRI_TRANSITIONS=508} [2024-06-21 20:36:48,059 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 343 predicate places. [2024-06-21 20:36:48,059 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 508 transitions, 6065 flow [2024-06-21 20:36:48,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:36:48,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:36:48,059 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:36:48,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-21 20:36:48,060 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:36:48,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:36:48,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1039055206, now seen corresponding path program 5 times [2024-06-21 20:36:48,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:36:48,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816513834] [2024-06-21 20:36:48,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:36:48,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:36:48,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:36:48,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:36:48,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:36:48,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816513834] [2024-06-21 20:36:48,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816513834] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:36:48,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:36:48,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:36:48,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802035919] [2024-06-21 20:36:48,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:36:48,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:36:48,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:36:48,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:36:48,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:36:48,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 20:36:48,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 508 transitions, 6065 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-21 20:36:48,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:36:48,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 20:36:48,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:36:50,421 INFO L124 PetriNetUnfolderBase]: 3500/5775 cut-off events. [2024-06-21 20:36:50,421 INFO L125 PetriNetUnfolderBase]: For 1211160/1211162 co-relation queries the response was YES. [2024-06-21 20:36:50,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60166 conditions, 5775 events. 3500/5775 cut-off events. For 1211160/1211162 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 37056 event pairs, 583 based on Foata normal form. 4/5756 useless extension candidates. Maximal degree in co-relation 59986. Up to 5084 conditions per place. [2024-06-21 20:36:50,507 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 433 selfloop transitions, 49 changer transitions 0/547 dead transitions. [2024-06-21 20:36:50,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 547 transitions, 7269 flow [2024-06-21 20:36:50,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:36:50,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:36:50,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-21 20:36:50,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603174603174603 [2024-06-21 20:36:50,509 INFO L175 Difference]: Start difference. First operand has 386 places, 508 transitions, 6065 flow. Second operand 9 states and 174 transitions. [2024-06-21 20:36:50,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 547 transitions, 7269 flow [2024-06-21 20:36:53,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 547 transitions, 7080 flow, removed 32 selfloop flow, removed 7 redundant places. [2024-06-21 20:36:53,934 INFO L231 Difference]: Finished difference. Result has 389 places, 517 transitions, 6143 flow [2024-06-21 20:36:53,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5876, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=508, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=463, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6143, PETRI_PLACES=389, PETRI_TRANSITIONS=517} [2024-06-21 20:36:53,935 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 346 predicate places. [2024-06-21 20:36:53,935 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 517 transitions, 6143 flow [2024-06-21 20:36:53,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-21 20:36:53,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:36:53,935 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:36:53,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-21 20:36:53,935 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:36:53,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:36:53,936 INFO L85 PathProgramCache]: Analyzing trace with hash 509461138, now seen corresponding path program 6 times [2024-06-21 20:36:53,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:36:53,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115866631] [2024-06-21 20:36:53,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:36:53,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:36:53,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:36:54,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:36:54,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:36:54,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115866631] [2024-06-21 20:36:54,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115866631] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:36:54,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:36:54,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:36:54,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738210365] [2024-06-21 20:36:54,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:36:54,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:36:54,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:36:54,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:36:54,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:36:54,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 20:36:54,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 517 transitions, 6143 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-21 20:36:54,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:36:54,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 20:36:54,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:36:56,373 INFO L124 PetriNetUnfolderBase]: 3564/5877 cut-off events. [2024-06-21 20:36:56,374 INFO L125 PetriNetUnfolderBase]: For 1232285/1232287 co-relation queries the response was YES. [2024-06-21 20:36:56,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61429 conditions, 5877 events. 3564/5877 cut-off events. For 1232285/1232287 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 37782 event pairs, 733 based on Foata normal form. 4/5843 useless extension candidates. Maximal degree in co-relation 61248. Up to 5224 conditions per place. [2024-06-21 20:36:56,458 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 444 selfloop transitions, 50 changer transitions 0/559 dead transitions. [2024-06-21 20:36:56,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 559 transitions, 7510 flow [2024-06-21 20:36:56,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:36:56,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:36:56,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-21 20:36:56,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46296296296296297 [2024-06-21 20:36:56,460 INFO L175 Difference]: Start difference. First operand has 389 places, 517 transitions, 6143 flow. Second operand 9 states and 175 transitions. [2024-06-21 20:36:56,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 559 transitions, 7510 flow [2024-06-21 20:36:59,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 559 transitions, 7226 flow, removed 90 selfloop flow, removed 7 redundant places. [2024-06-21 20:36:59,952 INFO L231 Difference]: Finished difference. Result has 392 places, 529 transitions, 6275 flow [2024-06-21 20:36:59,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5960, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=517, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=467, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6275, PETRI_PLACES=392, PETRI_TRANSITIONS=529} [2024-06-21 20:36:59,952 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 349 predicate places. [2024-06-21 20:36:59,952 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 529 transitions, 6275 flow [2024-06-21 20:36:59,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-21 20:36:59,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:36:59,953 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:36:59,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-21 20:36:59,953 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:36:59,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:36:59,953 INFO L85 PathProgramCache]: Analyzing trace with hash -133571584, now seen corresponding path program 14 times [2024-06-21 20:36:59,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:36:59,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019320467] [2024-06-21 20:36:59,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:36:59,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:36:59,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:37:00,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:37:00,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:37:00,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019320467] [2024-06-21 20:37:00,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019320467] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:37:00,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:37:00,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:37:00,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075798378] [2024-06-21 20:37:00,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:37:00,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:37:00,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:37:00,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:37:00,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:37:00,855 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:37:00,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 529 transitions, 6275 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 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) [2024-06-21 20:37:00,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:37:00,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:37:00,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:37:02,402 INFO L124 PetriNetUnfolderBase]: 3704/6047 cut-off events. [2024-06-21 20:37:02,403 INFO L125 PetriNetUnfolderBase]: For 1237968/1237970 co-relation queries the response was YES. [2024-06-21 20:37:02,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62629 conditions, 6047 events. 3704/6047 cut-off events. For 1237968/1237970 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 38308 event pairs, 759 based on Foata normal form. 3/6048 useless extension candidates. Maximal degree in co-relation 62447. Up to 5619 conditions per place. [2024-06-21 20:37:02,664 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 497 selfloop transitions, 58 changer transitions 0/560 dead transitions. [2024-06-21 20:37:02,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 560 transitions, 7526 flow [2024-06-21 20:37:02,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:37:02,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:37:02,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-21 20:37:02,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-21 20:37:02,665 INFO L175 Difference]: Start difference. First operand has 392 places, 529 transitions, 6275 flow. Second operand 9 states and 166 transitions. [2024-06-21 20:37:02,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 560 transitions, 7526 flow [2024-06-21 20:37:06,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 560 transitions, 7302 flow, removed 71 selfloop flow, removed 6 redundant places. [2024-06-21 20:37:06,197 INFO L231 Difference]: Finished difference. Result has 395 places, 535 transitions, 6248 flow [2024-06-21 20:37:06,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6051, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=471, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6248, PETRI_PLACES=395, PETRI_TRANSITIONS=535} [2024-06-21 20:37:06,198 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 352 predicate places. [2024-06-21 20:37:06,198 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 535 transitions, 6248 flow [2024-06-21 20:37:06,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 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) [2024-06-21 20:37:06,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:37:06,198 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:37:06,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-21 20:37:06,199 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:37:06,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:37:06,199 INFO L85 PathProgramCache]: Analyzing trace with hash -17951938, now seen corresponding path program 13 times [2024-06-21 20:37:06,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:37:06,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163128545] [2024-06-21 20:37:06,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:37:06,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:37:06,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:37:07,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:37:07,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:37:07,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163128545] [2024-06-21 20:37:07,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163128545] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:37:07,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:37:07,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:37:07,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205185469] [2024-06-21 20:37:07,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:37:07,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:37:07,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:37:07,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:37:07,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:37:07,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:37:07,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 535 transitions, 6248 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 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) [2024-06-21 20:37:07,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:37:07,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:37:07,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:37:08,755 INFO L124 PetriNetUnfolderBase]: 3772/6157 cut-off events. [2024-06-21 20:37:08,755 INFO L125 PetriNetUnfolderBase]: For 1247980/1247984 co-relation queries the response was YES. [2024-06-21 20:37:08,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63048 conditions, 6157 events. 3772/6157 cut-off events. For 1247980/1247984 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 39128 event pairs, 794 based on Foata normal form. 4/6159 useless extension candidates. Maximal degree in co-relation 62865. Up to 5651 conditions per place. [2024-06-21 20:37:09,020 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 509 selfloop transitions, 76 changer transitions 0/590 dead transitions. [2024-06-21 20:37:09,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 590 transitions, 7947 flow [2024-06-21 20:37:09,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:37:09,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:37:09,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-21 20:37:09,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4497354497354497 [2024-06-21 20:37:09,036 INFO L175 Difference]: Start difference. First operand has 395 places, 535 transitions, 6248 flow. Second operand 9 states and 170 transitions. [2024-06-21 20:37:09,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 590 transitions, 7947 flow [2024-06-21 20:37:13,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 590 transitions, 7695 flow, removed 34 selfloop flow, removed 9 redundant places. [2024-06-21 20:37:13,731 INFO L231 Difference]: Finished difference. Result has 397 places, 563 transitions, 6575 flow [2024-06-21 20:37:13,731 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6001, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=535, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=477, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6575, PETRI_PLACES=397, PETRI_TRANSITIONS=563} [2024-06-21 20:37:13,732 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 354 predicate places. [2024-06-21 20:37:13,732 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 563 transitions, 6575 flow [2024-06-21 20:37:13,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 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) [2024-06-21 20:37:13,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:37:13,732 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:37:13,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-21 20:37:13,732 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:37:13,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:37:13,741 INFO L85 PathProgramCache]: Analyzing trace with hash -687293810, now seen corresponding path program 7 times [2024-06-21 20:37:13,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:37:13,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231281349] [2024-06-21 20:37:13,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:37:13,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:37:13,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:37:14,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:37:14,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:37:14,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231281349] [2024-06-21 20:37:14,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231281349] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:37:14,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:37:14,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:37:14,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696168975] [2024-06-21 20:37:14,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:37:14,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:37:14,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:37:14,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:37:14,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:37:14,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 20:37:14,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 563 transitions, 6575 flow. Second operand has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:14,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:37:14,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 20:37:14,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:37:16,448 INFO L124 PetriNetUnfolderBase]: 3704/6084 cut-off events. [2024-06-21 20:37:16,448 INFO L125 PetriNetUnfolderBase]: For 1268280/1268296 co-relation queries the response was YES. [2024-06-21 20:37:16,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62735 conditions, 6084 events. 3704/6084 cut-off events. For 1268280/1268296 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 39096 event pairs, 740 based on Foata normal form. 18/6064 useless extension candidates. Maximal degree in co-relation 62549. Up to 5394 conditions per place. [2024-06-21 20:37:16,541 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 484 selfloop transitions, 53 changer transitions 0/605 dead transitions. [2024-06-21 20:37:16,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 605 transitions, 7961 flow [2024-06-21 20:37:16,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:37:16,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:37:16,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-21 20:37:16,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46296296296296297 [2024-06-21 20:37:16,543 INFO L175 Difference]: Start difference. First operand has 397 places, 563 transitions, 6575 flow. Second operand 9 states and 175 transitions. [2024-06-21 20:37:16,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 605 transitions, 7961 flow [2024-06-21 20:37:20,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 605 transitions, 7717 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-21 20:37:20,332 INFO L231 Difference]: Finished difference. Result has 400 places, 577 transitions, 6703 flow [2024-06-21 20:37:20,332 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6331, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=563, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=510, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6703, PETRI_PLACES=400, PETRI_TRANSITIONS=577} [2024-06-21 20:37:20,333 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 357 predicate places. [2024-06-21 20:37:20,333 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 577 transitions, 6703 flow [2024-06-21 20:37:20,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:20,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:37:20,333 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:37:20,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-21 20:37:20,333 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:37:20,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:37:20,334 INFO L85 PathProgramCache]: Analyzing trace with hash -676242620, now seen corresponding path program 8 times [2024-06-21 20:37:20,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:37:20,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692339498] [2024-06-21 20:37:20,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:37:20,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:37:20,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:37:21,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:37:21,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:37:21,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692339498] [2024-06-21 20:37:21,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692339498] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:37:21,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:37:21,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:37:21,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481520957] [2024-06-21 20:37:21,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:37:21,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:37:21,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:37:21,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:37:21,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:37:21,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 20:37:21,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 577 transitions, 6703 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-21 20:37:21,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:37:21,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 20:37:21,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:37:22,893 INFO L124 PetriNetUnfolderBase]: 3725/6111 cut-off events. [2024-06-21 20:37:22,893 INFO L125 PetriNetUnfolderBase]: For 1271747/1271761 co-relation queries the response was YES. [2024-06-21 20:37:22,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62837 conditions, 6111 events. 3725/6111 cut-off events. For 1271747/1271761 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 39238 event pairs, 754 based on Foata normal form. 16/6089 useless extension candidates. Maximal degree in co-relation 62650. Up to 5465 conditions per place. [2024-06-21 20:37:22,986 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 485 selfloop transitions, 57 changer transitions 0/610 dead transitions. [2024-06-21 20:37:22,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 610 transitions, 8074 flow [2024-06-21 20:37:22,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:37:22,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:37:22,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-21 20:37:22,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-21 20:37:22,988 INFO L175 Difference]: Start difference. First operand has 400 places, 577 transitions, 6703 flow. Second operand 9 states and 168 transitions. [2024-06-21 20:37:22,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 610 transitions, 8074 flow [2024-06-21 20:37:26,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 610 transitions, 7909 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-06-21 20:37:26,933 INFO L231 Difference]: Finished difference. Result has 405 places, 590 transitions, 6928 flow [2024-06-21 20:37:26,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6538, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=577, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=520, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6928, PETRI_PLACES=405, PETRI_TRANSITIONS=590} [2024-06-21 20:37:26,933 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 362 predicate places. [2024-06-21 20:37:26,934 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 590 transitions, 6928 flow [2024-06-21 20:37:26,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-21 20:37:26,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:37:26,935 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:37:26,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-21 20:37:26,935 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:37:26,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:37:26,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1797986757, now seen corresponding path program 1 times [2024-06-21 20:37:26,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:37:26,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300506756] [2024-06-21 20:37:26,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:37:26,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:37:26,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:37:28,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:37:28,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:37:28,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300506756] [2024-06-21 20:37:28,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300506756] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:37:28,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:37:28,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:37:28,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904582501] [2024-06-21 20:37:28,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:37:28,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:37:28,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:37:28,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:37:28,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:37:28,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 20:37:28,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 590 transitions, 6928 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:28,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:37:28,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 20:37:28,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:37:30,024 INFO L124 PetriNetUnfolderBase]: 3734/6169 cut-off events. [2024-06-21 20:37:30,025 INFO L125 PetriNetUnfolderBase]: For 1291515/1291520 co-relation queries the response was YES. [2024-06-21 20:37:30,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63502 conditions, 6169 events. 3734/6169 cut-off events. For 1291515/1291520 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 39901 event pairs, 837 based on Foata normal form. 2/6169 useless extension candidates. Maximal degree in co-relation 63312. Up to 5649 conditions per place. [2024-06-21 20:37:30,133 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 564 selfloop transitions, 21 changer transitions 0/613 dead transitions. [2024-06-21 20:37:30,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 613 transitions, 8280 flow [2024-06-21 20:37:30,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:37:30,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:37:30,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-21 20:37:30,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-21 20:37:30,135 INFO L175 Difference]: Start difference. First operand has 405 places, 590 transitions, 6928 flow. Second operand 9 states and 164 transitions. [2024-06-21 20:37:30,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 613 transitions, 8280 flow [2024-06-21 20:37:33,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 613 transitions, 8066 flow, removed 47 selfloop flow, removed 7 redundant places. [2024-06-21 20:37:33,066 INFO L231 Difference]: Finished difference. Result has 407 places, 593 transitions, 6860 flow [2024-06-21 20:37:33,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6714, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=590, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=569, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6860, PETRI_PLACES=407, PETRI_TRANSITIONS=593} [2024-06-21 20:37:33,067 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 364 predicate places. [2024-06-21 20:37:33,067 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 593 transitions, 6860 flow [2024-06-21 20:37:33,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:33,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:37:33,068 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:37:33,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-21 20:37:33,069 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:37:33,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:37:33,070 INFO L85 PathProgramCache]: Analyzing trace with hash 1468347649, now seen corresponding path program 2 times [2024-06-21 20:37:33,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:37:33,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247948336] [2024-06-21 20:37:33,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:37:33,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:37:33,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:37:34,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:37:34,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:37:34,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247948336] [2024-06-21 20:37:34,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247948336] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:37:34,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:37:34,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:37:34,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333562361] [2024-06-21 20:37:34,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:37:34,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:37:34,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:37:34,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:37:34,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:37:34,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 20:37:34,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 593 transitions, 6860 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:34,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:37:34,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 20:37:34,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:37:36,195 INFO L124 PetriNetUnfolderBase]: 3739/6184 cut-off events. [2024-06-21 20:37:36,195 INFO L125 PetriNetUnfolderBase]: For 1309540/1309551 co-relation queries the response was YES. [2024-06-21 20:37:36,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63901 conditions, 6184 events. 3739/6184 cut-off events. For 1309540/1309551 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 40169 event pairs, 835 based on Foata normal form. 7/6188 useless extension candidates. Maximal degree in co-relation 63710. Up to 5656 conditions per place. [2024-06-21 20:37:36,305 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 564 selfloop transitions, 22 changer transitions 0/614 dead transitions. [2024-06-21 20:37:36,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 614 transitions, 8224 flow [2024-06-21 20:37:36,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:37:36,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:37:36,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-21 20:37:36,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-21 20:37:36,309 INFO L175 Difference]: Start difference. First operand has 407 places, 593 transitions, 6860 flow. Second operand 9 states and 163 transitions. [2024-06-21 20:37:36,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 614 transitions, 8224 flow [2024-06-21 20:37:41,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 614 transitions, 8100 flow, removed 43 selfloop flow, removed 7 redundant places. [2024-06-21 20:37:41,080 INFO L231 Difference]: Finished difference. Result has 409 places, 596 transitions, 6890 flow [2024-06-21 20:37:41,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6736, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=593, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=571, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6890, PETRI_PLACES=409, PETRI_TRANSITIONS=596} [2024-06-21 20:37:41,081 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 366 predicate places. [2024-06-21 20:37:41,082 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 596 transitions, 6890 flow [2024-06-21 20:37:41,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:41,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:37:41,083 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:37:41,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-21 20:37:41,085 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:37:41,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:37:41,085 INFO L85 PathProgramCache]: Analyzing trace with hash 1612238179, now seen corresponding path program 3 times [2024-06-21 20:37:41,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:37:41,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586459663] [2024-06-21 20:37:41,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:37:41,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:37:41,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:37:42,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:37:42,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:37:42,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586459663] [2024-06-21 20:37:42,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586459663] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:37:42,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:37:42,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:37:42,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249521315] [2024-06-21 20:37:42,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:37:42,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:37:42,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:37:42,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:37:42,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:37:42,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 20:37:42,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 596 transitions, 6890 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:42,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:37:42,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 20:37:42,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:37:44,208 INFO L124 PetriNetUnfolderBase]: 3775/6241 cut-off events. [2024-06-21 20:37:44,208 INFO L125 PetriNetUnfolderBase]: For 1372731/1372753 co-relation queries the response was YES. [2024-06-21 20:37:44,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65484 conditions, 6241 events. 3775/6241 cut-off events. For 1372731/1372753 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 40546 event pairs, 833 based on Foata normal form. 5/6243 useless extension candidates. Maximal degree in co-relation 65292. Up to 5681 conditions per place. [2024-06-21 20:37:44,317 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 562 selfloop transitions, 34 changer transitions 0/624 dead transitions. [2024-06-21 20:37:44,317 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 624 transitions, 8754 flow [2024-06-21 20:37:44,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:37:44,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:37:44,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-21 20:37:44,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-21 20:37:44,319 INFO L175 Difference]: Start difference. First operand has 409 places, 596 transitions, 6890 flow. Second operand 9 states and 166 transitions. [2024-06-21 20:37:44,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 624 transitions, 8754 flow [2024-06-21 20:37:48,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 624 transitions, 8622 flow, removed 46 selfloop flow, removed 7 redundant places. [2024-06-21 20:37:48,985 INFO L231 Difference]: Finished difference. Result has 412 places, 607 transitions, 7180 flow [2024-06-21 20:37:48,986 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6758, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=596, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=565, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7180, PETRI_PLACES=412, PETRI_TRANSITIONS=607} [2024-06-21 20:37:48,986 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 369 predicate places. [2024-06-21 20:37:48,986 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 607 transitions, 7180 flow [2024-06-21 20:37:48,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:48,986 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:37:48,987 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:37:48,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-21 20:37:48,987 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:37:48,987 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:37:48,987 INFO L85 PathProgramCache]: Analyzing trace with hash 1998615893, now seen corresponding path program 4 times [2024-06-21 20:37:48,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:37:48,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395111945] [2024-06-21 20:37:48,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:37:48,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:37:48,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:37:50,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:37:50,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:37:50,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395111945] [2024-06-21 20:37:50,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395111945] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:37:50,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:37:50,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:37:50,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167966914] [2024-06-21 20:37:50,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:37:50,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:37:50,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:37:50,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:37:50,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:37:50,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 20:37:50,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 607 transitions, 7180 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:50,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:37:50,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 20:37:50,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:37:52,339 INFO L124 PetriNetUnfolderBase]: 3801/6281 cut-off events. [2024-06-21 20:37:52,340 INFO L125 PetriNetUnfolderBase]: For 1413661/1413683 co-relation queries the response was YES. [2024-06-21 20:37:52,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67021 conditions, 6281 events. 3801/6281 cut-off events. For 1413661/1413683 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 40848 event pairs, 832 based on Foata normal form. 5/6283 useless extension candidates. Maximal degree in co-relation 66827. Up to 5667 conditions per place. [2024-06-21 20:37:52,443 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 553 selfloop transitions, 55 changer transitions 0/636 dead transitions. [2024-06-21 20:37:52,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 636 transitions, 9384 flow [2024-06-21 20:37:52,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:37:52,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:37:52,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-21 20:37:52,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-21 20:37:52,444 INFO L175 Difference]: Start difference. First operand has 412 places, 607 transitions, 7180 flow. Second operand 9 states and 169 transitions. [2024-06-21 20:37:52,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 636 transitions, 9384 flow [2024-06-21 20:37:57,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 636 transitions, 9221 flow, removed 69 selfloop flow, removed 5 redundant places. [2024-06-21 20:37:57,213 INFO L231 Difference]: Finished difference. Result has 416 places, 617 transitions, 7506 flow [2024-06-21 20:37:57,213 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7017, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=607, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=558, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7506, PETRI_PLACES=416, PETRI_TRANSITIONS=617} [2024-06-21 20:37:57,214 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 373 predicate places. [2024-06-21 20:37:57,214 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 617 transitions, 7506 flow [2024-06-21 20:37:57,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:57,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:37:57,214 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:37:57,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-21 20:37:57,214 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:37:57,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:37:57,215 INFO L85 PathProgramCache]: Analyzing trace with hash -1400566573, now seen corresponding path program 5 times [2024-06-21 20:37:57,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:37:57,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620784663] [2024-06-21 20:37:57,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:37:57,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:37:57,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:37:58,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:37:58,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:37:58,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620784663] [2024-06-21 20:37:58,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620784663] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:37:58,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:37:58,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:37:58,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661652573] [2024-06-21 20:37:58,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:37:58,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:37:58,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:37:58,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:37:58,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:37:58,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 20:37:58,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 617 transitions, 7506 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:58,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:37:58,610 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 20:37:58,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:38:00,381 INFO L124 PetriNetUnfolderBase]: 3806/6293 cut-off events. [2024-06-21 20:38:00,382 INFO L125 PetriNetUnfolderBase]: For 1430024/1430048 co-relation queries the response was YES. [2024-06-21 20:38:00,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67680 conditions, 6293 events. 3806/6293 cut-off events. For 1430024/1430048 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 40985 event pairs, 839 based on Foata normal form. 4/6294 useless extension candidates. Maximal degree in co-relation 67484. Up to 5671 conditions per place. [2024-06-21 20:38:00,493 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 558 selfloop transitions, 68 changer transitions 0/654 dead transitions. [2024-06-21 20:38:00,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 654 transitions, 9601 flow [2024-06-21 20:38:00,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:38:00,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:38:00,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-21 20:38:00,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-21 20:38:00,494 INFO L175 Difference]: Start difference. First operand has 416 places, 617 transitions, 7506 flow. Second operand 9 states and 164 transitions. [2024-06-21 20:38:00,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 654 transitions, 9601 flow [2024-06-21 20:38:03,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 654 transitions, 9302 flow, removed 138 selfloop flow, removed 4 redundant places. [2024-06-21 20:38:04,003 INFO L231 Difference]: Finished difference. Result has 424 places, 637 transitions, 7905 flow [2024-06-21 20:38:04,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7309, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=617, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=554, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7905, PETRI_PLACES=424, PETRI_TRANSITIONS=637} [2024-06-21 20:38:04,004 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 381 predicate places. [2024-06-21 20:38:04,004 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 637 transitions, 7905 flow [2024-06-21 20:38:04,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:04,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:38:04,005 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:38:04,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-21 20:38:04,005 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:38:04,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:38:04,005 INFO L85 PathProgramCache]: Analyzing trace with hash 473415141, now seen corresponding path program 6 times [2024-06-21 20:38:04,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:38:04,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901304951] [2024-06-21 20:38:04,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:38:04,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:38:04,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:38:05,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:38:05,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:38:05,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901304951] [2024-06-21 20:38:05,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901304951] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:38:05,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:38:05,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:38:05,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363273956] [2024-06-21 20:38:05,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:38:05,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:38:05,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:38:05,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:38:05,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:38:05,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 20:38:05,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 637 transitions, 7905 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:05,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:38:05,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 20:38:05,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:38:07,473 INFO L124 PetriNetUnfolderBase]: 3826/6326 cut-off events. [2024-06-21 20:38:07,473 INFO L125 PetriNetUnfolderBase]: For 1466673/1466697 co-relation queries the response was YES. [2024-06-21 20:38:07,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68384 conditions, 6326 events. 3826/6326 cut-off events. For 1466673/1466697 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 41212 event pairs, 839 based on Foata normal form. 5/6328 useless extension candidates. Maximal degree in co-relation 68183. Up to 5740 conditions per place. [2024-06-21 20:38:07,586 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 589 selfloop transitions, 43 changer transitions 0/660 dead transitions. [2024-06-21 20:38:07,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 660 transitions, 9862 flow [2024-06-21 20:38:07,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:38:07,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:38:07,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-21 20:38:07,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-21 20:38:07,587 INFO L175 Difference]: Start difference. First operand has 424 places, 637 transitions, 7905 flow. Second operand 9 states and 165 transitions. [2024-06-21 20:38:07,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 660 transitions, 9862 flow [2024-06-21 20:38:11,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 660 transitions, 9669 flow, removed 82 selfloop flow, removed 3 redundant places. [2024-06-21 20:38:11,988 INFO L231 Difference]: Finished difference. Result has 430 places, 646 transitions, 8171 flow [2024-06-21 20:38:11,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7718, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=637, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=597, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8171, PETRI_PLACES=430, PETRI_TRANSITIONS=646} [2024-06-21 20:38:11,989 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 387 predicate places. [2024-06-21 20:38:11,989 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 646 transitions, 8171 flow [2024-06-21 20:38:11,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:11,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:38:11,989 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:38:11,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-21 20:38:11,990 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:38:11,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:38:11,990 INFO L85 PathProgramCache]: Analyzing trace with hash -1657067083, now seen corresponding path program 7 times [2024-06-21 20:38:11,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:38:11,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643082257] [2024-06-21 20:38:11,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:38:11,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:38:12,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:38:13,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:38:13,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:38:13,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643082257] [2024-06-21 20:38:13,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643082257] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:38:13,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:38:13,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:38:13,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71149580] [2024-06-21 20:38:13,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:38:13,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:38:13,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:38:13,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:38:13,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:38:13,664 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 20:38:13,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 646 transitions, 8171 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:13,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:38:13,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 20:38:13,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:38:15,589 INFO L124 PetriNetUnfolderBase]: 3835/6340 cut-off events. [2024-06-21 20:38:15,589 INFO L125 PetriNetUnfolderBase]: For 1485024/1485042 co-relation queries the response was YES. [2024-06-21 20:38:15,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69024 conditions, 6340 events. 3835/6340 cut-off events. For 1485024/1485042 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 41326 event pairs, 838 based on Foata normal form. 5/6343 useless extension candidates. Maximal degree in co-relation 68821. Up to 5727 conditions per place. [2024-06-21 20:38:15,695 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 584 selfloop transitions, 58 changer transitions 0/670 dead transitions. [2024-06-21 20:38:15,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 670 transitions, 10376 flow [2024-06-21 20:38:15,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:38:15,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:38:15,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-21 20:38:15,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4497354497354497 [2024-06-21 20:38:15,697 INFO L175 Difference]: Start difference. First operand has 430 places, 646 transitions, 8171 flow. Second operand 9 states and 170 transitions. [2024-06-21 20:38:15,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 670 transitions, 10376 flow [2024-06-21 20:38:20,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 670 transitions, 10043 flow, removed 150 selfloop flow, removed 5 redundant places. [2024-06-21 20:38:20,124 INFO L231 Difference]: Finished difference. Result has 434 places, 653 transitions, 8242 flow [2024-06-21 20:38:20,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7844, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=646, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=591, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8242, PETRI_PLACES=434, PETRI_TRANSITIONS=653} [2024-06-21 20:38:20,125 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 391 predicate places. [2024-06-21 20:38:20,125 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 653 transitions, 8242 flow [2024-06-21 20:38:20,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:20,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:38:20,125 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:38:20,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-21 20:38:20,125 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:38:20,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:38:20,126 INFO L85 PathProgramCache]: Analyzing trace with hash 1719841868, now seen corresponding path program 1 times [2024-06-21 20:38:20,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:38:20,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391183832] [2024-06-21 20:38:20,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:38:20,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:38:20,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:38:20,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:38:20,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:38:20,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391183832] [2024-06-21 20:38:20,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391183832] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:38:20,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:38:20,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:38:20,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581443420] [2024-06-21 20:38:20,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:38:20,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:38:20,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:38:20,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:38:20,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:38:21,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:38:21,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 653 transitions, 8242 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:21,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:38:21,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:38:21,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:38:22,959 INFO L124 PetriNetUnfolderBase]: 3999/6527 cut-off events. [2024-06-21 20:38:22,959 INFO L125 PetriNetUnfolderBase]: For 1496326/1496328 co-relation queries the response was YES. [2024-06-21 20:38:23,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70907 conditions, 6527 events. 3999/6527 cut-off events. For 1496326/1496328 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 41900 event pairs, 796 based on Foata normal form. 4/6529 useless extension candidates. Maximal degree in co-relation 70702. Up to 5988 conditions per place. [2024-06-21 20:38:23,084 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 615 selfloop transitions, 65 changer transitions 0/685 dead transitions. [2024-06-21 20:38:23,084 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 685 transitions, 9896 flow [2024-06-21 20:38:23,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:38:23,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:38:23,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-21 20:38:23,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-21 20:38:23,085 INFO L175 Difference]: Start difference. First operand has 434 places, 653 transitions, 8242 flow. Second operand 9 states and 166 transitions. [2024-06-21 20:38:23,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 685 transitions, 9896 flow [2024-06-21 20:38:27,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 685 transitions, 9605 flow, removed 103 selfloop flow, removed 6 redundant places. [2024-06-21 20:38:27,645 INFO L231 Difference]: Finished difference. Result has 438 places, 657 transitions, 8258 flow [2024-06-21 20:38:27,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7953, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=653, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=588, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8258, PETRI_PLACES=438, PETRI_TRANSITIONS=657} [2024-06-21 20:38:27,645 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 395 predicate places. [2024-06-21 20:38:27,645 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 657 transitions, 8258 flow [2024-06-21 20:38:27,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:27,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:38:27,646 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:38:27,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-21 20:38:27,646 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:38:27,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:38:27,646 INFO L85 PathProgramCache]: Analyzing trace with hash 1719991815, now seen corresponding path program 1 times [2024-06-21 20:38:27,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:38:27,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020085861] [2024-06-21 20:38:27,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:38:27,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:38:27,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:38:28,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:38:28,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:38:28,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020085861] [2024-06-21 20:38:28,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020085861] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:38:28,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:38:28,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:38:28,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219327925] [2024-06-21 20:38:28,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:38:28,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:38:28,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:38:28,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:38:28,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:38:28,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:38:28,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 657 transitions, 8258 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:28,733 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:38:28,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:38:28,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:38:30,553 INFO L124 PetriNetUnfolderBase]: 4004/6534 cut-off events. [2024-06-21 20:38:30,554 INFO L125 PetriNetUnfolderBase]: For 1510522/1510524 co-relation queries the response was YES. [2024-06-21 20:38:30,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71055 conditions, 6534 events. 4004/6534 cut-off events. For 1510522/1510524 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 41908 event pairs, 795 based on Foata normal form. 3/6535 useless extension candidates. Maximal degree in co-relation 70848. Up to 6000 conditions per place. [2024-06-21 20:38:30,680 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 599 selfloop transitions, 80 changer transitions 0/684 dead transitions. [2024-06-21 20:38:30,680 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 684 transitions, 9820 flow [2024-06-21 20:38:30,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:38:30,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:38:30,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-21 20:38:30,681 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 20:38:30,681 INFO L175 Difference]: Start difference. First operand has 438 places, 657 transitions, 8258 flow. Second operand 9 states and 162 transitions. [2024-06-21 20:38:30,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 684 transitions, 9820 flow [2024-06-21 20:38:35,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 684 transitions, 9577 flow, removed 64 selfloop flow, removed 6 redundant places. [2024-06-21 20:38:35,709 INFO L231 Difference]: Finished difference. Result has 441 places, 660 transitions, 8294 flow [2024-06-21 20:38:35,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8015, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=657, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=577, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8294, PETRI_PLACES=441, PETRI_TRANSITIONS=660} [2024-06-21 20:38:35,710 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 398 predicate places. [2024-06-21 20:38:35,710 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 660 transitions, 8294 flow [2024-06-21 20:38:35,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:35,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:38:35,711 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:38:35,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-21 20:38:35,711 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:38:35,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:38:35,711 INFO L85 PathProgramCache]: Analyzing trace with hash -821403312, now seen corresponding path program 2 times [2024-06-21 20:38:35,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:38:35,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277985147] [2024-06-21 20:38:35,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:38:35,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:38:35,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:38:36,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:38:36,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:38:36,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277985147] [2024-06-21 20:38:36,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277985147] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:38:36,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:38:36,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:38:36,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091913491] [2024-06-21 20:38:36,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:38:36,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:38:36,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:38:36,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:38:36,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:38:36,642 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:38:36,642 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 660 transitions, 8294 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:36,642 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:38:36,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:38:36,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:38:38,567 INFO L124 PetriNetUnfolderBase]: 4014/6552 cut-off events. [2024-06-21 20:38:38,567 INFO L125 PetriNetUnfolderBase]: For 1543105/1543107 co-relation queries the response was YES. [2024-06-21 20:38:38,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71728 conditions, 6552 events. 4014/6552 cut-off events. For 1543105/1543107 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 42088 event pairs, 795 based on Foata normal form. 4/6554 useless extension candidates. Maximal degree in co-relation 71520. Up to 5971 conditions per place. [2024-06-21 20:38:38,697 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 606 selfloop transitions, 78 changer transitions 0/689 dead transitions. [2024-06-21 20:38:38,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 449 places, 689 transitions, 9958 flow [2024-06-21 20:38:38,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:38:38,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:38:38,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-21 20:38:38,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-21 20:38:38,698 INFO L175 Difference]: Start difference. First operand has 441 places, 660 transitions, 8294 flow. Second operand 9 states and 166 transitions. [2024-06-21 20:38:38,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 449 places, 689 transitions, 9958 flow [2024-06-21 20:38:44,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 689 transitions, 9711 flow, removed 48 selfloop flow, removed 7 redundant places. [2024-06-21 20:38:44,708 INFO L231 Difference]: Finished difference. Result has 443 places, 663 transitions, 8370 flow [2024-06-21 20:38:44,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8047, PETRI_DIFFERENCE_MINUEND_PLACES=434, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=660, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=582, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8370, PETRI_PLACES=443, PETRI_TRANSITIONS=663} [2024-06-21 20:38:44,708 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 400 predicate places. [2024-06-21 20:38:44,708 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 663 transitions, 8370 flow [2024-06-21 20:38:44,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:44,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:38:44,709 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:38:44,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-21 20:38:44,709 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:38:44,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:38:44,710 INFO L85 PathProgramCache]: Analyzing trace with hash -614749872, now seen corresponding path program 3 times [2024-06-21 20:38:44,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:38:44,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342191216] [2024-06-21 20:38:44,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:38:44,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:38:44,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:38:45,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:38:45,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:38:45,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342191216] [2024-06-21 20:38:45,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342191216] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:38:45,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:38:45,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:38:45,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760817021] [2024-06-21 20:38:45,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:38:45,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:38:45,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:38:45,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:38:45,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:38:45,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:38:45,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 663 transitions, 8370 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:45,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:38:45,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:38:45,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:38:47,912 INFO L124 PetriNetUnfolderBase]: 4024/6568 cut-off events. [2024-06-21 20:38:47,913 INFO L125 PetriNetUnfolderBase]: For 1575783/1575785 co-relation queries the response was YES. [2024-06-21 20:38:48,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72634 conditions, 6568 events. 4024/6568 cut-off events. For 1575783/1575785 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 42255 event pairs, 795 based on Foata normal form. 4/6570 useless extension candidates. Maximal degree in co-relation 72425. Up to 5957 conditions per place. [2024-06-21 20:38:48,039 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 601 selfloop transitions, 87 changer transitions 0/693 dead transitions. [2024-06-21 20:38:48,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 693 transitions, 10050 flow [2024-06-21 20:38:48,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:38:48,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:38:48,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 181 transitions. [2024-06-21 20:38:48,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.430952380952381 [2024-06-21 20:38:48,041 INFO L175 Difference]: Start difference. First operand has 443 places, 663 transitions, 8370 flow. Second operand 10 states and 181 transitions. [2024-06-21 20:38:48,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 693 transitions, 10050 flow [2024-06-21 20:38:53,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 445 places, 693 transitions, 9769 flow, removed 67 selfloop flow, removed 7 redundant places. [2024-06-21 20:38:53,059 INFO L231 Difference]: Finished difference. Result has 446 places, 666 transitions, 8431 flow [2024-06-21 20:38:53,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8089, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=663, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=576, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8431, PETRI_PLACES=446, PETRI_TRANSITIONS=666} [2024-06-21 20:38:53,060 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 403 predicate places. [2024-06-21 20:38:53,060 INFO L495 AbstractCegarLoop]: Abstraction has has 446 places, 666 transitions, 8431 flow [2024-06-21 20:38:53,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:53,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:38:53,061 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:38:53,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-21 20:38:53,061 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:38:53,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:38:53,062 INFO L85 PathProgramCache]: Analyzing trace with hash -614749655, now seen corresponding path program 2 times [2024-06-21 20:38:53,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:38:53,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267599066] [2024-06-21 20:38:53,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:38:53,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:38:53,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:38:54,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:38:54,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:38:54,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267599066] [2024-06-21 20:38:54,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267599066] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:38:54,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:38:54,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:38:54,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926505886] [2024-06-21 20:38:54,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:38:54,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:38:54,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:38:54,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:38:54,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:38:54,280 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:38:54,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 666 transitions, 8431 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:54,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:38:54,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:38:54,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:38:56,184 INFO L124 PetriNetUnfolderBase]: 4029/6575 cut-off events. [2024-06-21 20:38:56,184 INFO L125 PetriNetUnfolderBase]: For 1594842/1594844 co-relation queries the response was YES. [2024-06-21 20:38:56,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73248 conditions, 6575 events. 4029/6575 cut-off events. For 1594842/1594844 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 42240 event pairs, 795 based on Foata normal form. 3/6576 useless extension candidates. Maximal degree in co-relation 73038. Up to 6023 conditions per place. [2024-06-21 20:38:56,310 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 597 selfloop transitions, 92 changer transitions 0/694 dead transitions. [2024-06-21 20:38:56,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 694 transitions, 10025 flow [2024-06-21 20:38:56,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:38:56,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:38:56,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 177 transitions. [2024-06-21 20:38:56,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42142857142857143 [2024-06-21 20:38:56,311 INFO L175 Difference]: Start difference. First operand has 446 places, 666 transitions, 8431 flow. Second operand 10 states and 177 transitions. [2024-06-21 20:38:56,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 694 transitions, 10025 flow [2024-06-21 20:39:01,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 447 places, 694 transitions, 9715 flow, removed 70 selfloop flow, removed 8 redundant places. [2024-06-21 20:39:01,503 INFO L231 Difference]: Finished difference. Result has 448 places, 669 transitions, 8429 flow [2024-06-21 20:39:01,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8121, PETRI_DIFFERENCE_MINUEND_PLACES=438, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=666, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=574, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8429, PETRI_PLACES=448, PETRI_TRANSITIONS=669} [2024-06-21 20:39:01,504 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 405 predicate places. [2024-06-21 20:39:01,504 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 669 transitions, 8429 flow [2024-06-21 20:39:01,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:01,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:39:01,504 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:39:01,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-21 20:39:01,504 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:39:01,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:39:01,505 INFO L85 PathProgramCache]: Analyzing trace with hash -614482745, now seen corresponding path program 3 times [2024-06-21 20:39:01,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:39:01,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030464161] [2024-06-21 20:39:01,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:39:01,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:39:01,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:39:02,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:39:02,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:39:02,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030464161] [2024-06-21 20:39:02,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030464161] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:39:02,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:39:02,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:39:02,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982711203] [2024-06-21 20:39:02,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:39:02,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:39:02,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:39:02,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:39:02,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:39:02,680 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:39:02,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 669 transitions, 8429 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:02,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:39:02,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:39:02,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:39:04,547 INFO L124 PetriNetUnfolderBase]: 4039/6589 cut-off events. [2024-06-21 20:39:04,547 INFO L125 PetriNetUnfolderBase]: For 1616223/1616225 co-relation queries the response was YES. [2024-06-21 20:39:04,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73726 conditions, 6589 events. 4039/6589 cut-off events. For 1616223/1616225 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 42354 event pairs, 795 based on Foata normal form. 3/6590 useless extension candidates. Maximal degree in co-relation 73515. Up to 6014 conditions per place. [2024-06-21 20:39:04,686 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 597 selfloop transitions, 98 changer transitions 0/700 dead transitions. [2024-06-21 20:39:04,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 700 transitions, 10064 flow [2024-06-21 20:39:04,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:39:04,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:39:04,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 178 transitions. [2024-06-21 20:39:04,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4238095238095238 [2024-06-21 20:39:04,688 INFO L175 Difference]: Start difference. First operand has 448 places, 669 transitions, 8429 flow. Second operand 10 states and 178 transitions. [2024-06-21 20:39:04,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 457 places, 700 transitions, 10064 flow [2024-06-21 20:39:10,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 700 transitions, 9778 flow, removed 53 selfloop flow, removed 8 redundant places. [2024-06-21 20:39:10,819 INFO L231 Difference]: Finished difference. Result has 451 places, 675 transitions, 8517 flow [2024-06-21 20:39:10,819 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8143, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=669, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=571, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8517, PETRI_PLACES=451, PETRI_TRANSITIONS=675} [2024-06-21 20:39:10,819 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 408 predicate places. [2024-06-21 20:39:10,819 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 675 transitions, 8517 flow [2024-06-21 20:39:10,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:10,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:39:10,820 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:39:10,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-21 20:39:10,820 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:39:10,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:39:10,821 INFO L85 PathProgramCache]: Analyzing trace with hash -1542494068, now seen corresponding path program 4 times [2024-06-21 20:39:10,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:39:10,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919969284] [2024-06-21 20:39:10,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:39:10,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:39:10,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:39:11,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:39:11,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:39:11,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919969284] [2024-06-21 20:39:11,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919969284] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:39:11,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:39:11,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:39:11,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771705915] [2024-06-21 20:39:11,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:39:11,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:39:11,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:39:11,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:39:11,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:39:11,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:39:11,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 675 transitions, 8517 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:11,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:39:11,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:39:11,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:39:13,697 INFO L124 PetriNetUnfolderBase]: 4049/6597 cut-off events. [2024-06-21 20:39:13,697 INFO L125 PetriNetUnfolderBase]: For 1654060/1654062 co-relation queries the response was YES. [2024-06-21 20:39:13,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74521 conditions, 6597 events. 4049/6597 cut-off events. For 1654060/1654062 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 42308 event pairs, 796 based on Foata normal form. 2/6597 useless extension candidates. Maximal degree in co-relation 74308. Up to 5857 conditions per place. [2024-06-21 20:39:13,823 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 595 selfloop transitions, 106 changer transitions 0/706 dead transitions. [2024-06-21 20:39:13,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 706 transitions, 10238 flow [2024-06-21 20:39:13,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:39:13,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:39:13,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-21 20:39:13,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-21 20:39:13,824 INFO L175 Difference]: Start difference. First operand has 451 places, 675 transitions, 8517 flow. Second operand 9 states and 171 transitions. [2024-06-21 20:39:13,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 706 transitions, 10238 flow [2024-06-21 20:39:19,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 452 places, 706 transitions, 9949 flow, removed 58 selfloop flow, removed 7 redundant places. [2024-06-21 20:39:19,217 INFO L231 Difference]: Finished difference. Result has 453 places, 679 transitions, 8628 flow [2024-06-21 20:39:19,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8228, PETRI_DIFFERENCE_MINUEND_PLACES=444, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=675, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=570, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8628, PETRI_PLACES=453, PETRI_TRANSITIONS=679} [2024-06-21 20:39:19,217 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 410 predicate places. [2024-06-21 20:39:19,217 INFO L495 AbstractCegarLoop]: Abstraction has has 453 places, 679 transitions, 8628 flow [2024-06-21 20:39:19,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:19,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:39:19,217 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:39:19,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-21 20:39:19,218 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:39:19,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:39:19,218 INFO L85 PathProgramCache]: Analyzing trace with hash 999050572, now seen corresponding path program 5 times [2024-06-21 20:39:19,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:39:19,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097155273] [2024-06-21 20:39:19,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:39:19,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:39:19,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:39:20,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:39:20,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:39:20,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097155273] [2024-06-21 20:39:20,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097155273] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:39:20,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:39:20,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:39:20,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460772711] [2024-06-21 20:39:20,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:39:20,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:39:20,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:39:20,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:39:20,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:39:20,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:39:20,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 453 places, 679 transitions, 8628 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:20,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:39:20,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:39:20,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:39:22,113 INFO L124 PetriNetUnfolderBase]: 4075/6639 cut-off events. [2024-06-21 20:39:22,113 INFO L125 PetriNetUnfolderBase]: For 1708930/1708932 co-relation queries the response was YES. [2024-06-21 20:39:22,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76307 conditions, 6639 events. 4075/6639 cut-off events. For 1708930/1708932 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 42679 event pairs, 797 based on Foata normal form. 2/6639 useless extension candidates. Maximal degree in co-relation 76093. Up to 5875 conditions per place. [2024-06-21 20:39:22,235 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 592 selfloop transitions, 114 changer transitions 0/711 dead transitions. [2024-06-21 20:39:22,235 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 461 places, 711 transitions, 10811 flow [2024-06-21 20:39:22,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:39:22,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:39:22,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-21 20:39:22,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-21 20:39:22,236 INFO L175 Difference]: Start difference. First operand has 453 places, 679 transitions, 8628 flow. Second operand 9 states and 171 transitions. [2024-06-21 20:39:22,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 461 places, 711 transitions, 10811 flow [2024-06-21 20:39:29,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 711 transitions, 10488 flow, removed 79 selfloop flow, removed 6 redundant places. [2024-06-21 20:39:29,119 INFO L231 Difference]: Finished difference. Result has 456 places, 685 transitions, 8889 flow [2024-06-21 20:39:29,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8305, PETRI_DIFFERENCE_MINUEND_PLACES=447, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=679, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=568, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8889, PETRI_PLACES=456, PETRI_TRANSITIONS=685} [2024-06-21 20:39:29,120 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 413 predicate places. [2024-06-21 20:39:29,120 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 685 transitions, 8889 flow [2024-06-21 20:39:29,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:29,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:39:29,121 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:39:29,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-21 20:39:29,121 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:39:29,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:39:29,121 INFO L85 PathProgramCache]: Analyzing trace with hash -266539675, now seen corresponding path program 4 times [2024-06-21 20:39:29,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:39:29,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806778120] [2024-06-21 20:39:29,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:39:29,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:39:29,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:39:30,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:39:30,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:39:30,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806778120] [2024-06-21 20:39:30,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806778120] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:39:30,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:39:30,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:39:30,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869400590] [2024-06-21 20:39:30,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:39:30,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:39:30,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:39:30,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:39:30,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:39:30,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:39:30,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 685 transitions, 8889 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:30,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:39:30,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:39:30,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:39:31,908 INFO L124 PetriNetUnfolderBase]: 4080/6647 cut-off events. [2024-06-21 20:39:31,908 INFO L125 PetriNetUnfolderBase]: For 1734401/1734403 co-relation queries the response was YES. [2024-06-21 20:39:31,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76887 conditions, 6647 events. 4080/6647 cut-off events. For 1734401/1734403 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 42746 event pairs, 787 based on Foata normal form. 3/6648 useless extension candidates. Maximal degree in co-relation 76674. Up to 6058 conditions per place. [2024-06-21 20:39:32,031 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 626 selfloop transitions, 81 changer transitions 0/712 dead transitions. [2024-06-21 20:39:32,031 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 712 transitions, 10541 flow [2024-06-21 20:39:32,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:39:32,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:39:32,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-21 20:39:32,032 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-21 20:39:32,032 INFO L175 Difference]: Start difference. First operand has 456 places, 685 transitions, 8889 flow. Second operand 9 states and 163 transitions. [2024-06-21 20:39:32,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 464 places, 712 transitions, 10541 flow [2024-06-21 20:39:38,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 459 places, 712 transitions, 10237 flow, removed 90 selfloop flow, removed 5 redundant places. [2024-06-21 20:39:38,579 INFO L231 Difference]: Finished difference. Result has 460 places, 688 transitions, 8887 flow [2024-06-21 20:39:38,579 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8585, PETRI_DIFFERENCE_MINUEND_PLACES=451, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=685, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=604, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8887, PETRI_PLACES=460, PETRI_TRANSITIONS=688} [2024-06-21 20:39:38,579 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 417 predicate places. [2024-06-21 20:39:38,579 INFO L495 AbstractCegarLoop]: Abstraction has has 460 places, 688 transitions, 8887 flow [2024-06-21 20:39:38,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:38,580 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:39:38,580 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:39:38,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-21 20:39:38,580 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:39:38,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:39:38,580 INFO L85 PathProgramCache]: Analyzing trace with hash 1004263222, now seen corresponding path program 6 times [2024-06-21 20:39:38,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:39:38,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268568935] [2024-06-21 20:39:38,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:39:38,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:39:38,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:39:39,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:39:39,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:39:39,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268568935] [2024-06-21 20:39:39,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268568935] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:39:39,372 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:39:39,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:39:39,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027761765] [2024-06-21 20:39:39,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:39:39,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:39:39,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:39:39,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:39:39,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:39:39,453 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:39:39,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 460 places, 688 transitions, 8887 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:39,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:39:39,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:39:39,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:39:41,410 INFO L124 PetriNetUnfolderBase]: 4074/6639 cut-off events. [2024-06-21 20:39:41,410 INFO L125 PetriNetUnfolderBase]: For 1742531/1742533 co-relation queries the response was YES. [2024-06-21 20:39:41,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76864 conditions, 6639 events. 4074/6639 cut-off events. For 1742531/1742533 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 42731 event pairs, 793 based on Foata normal form. 2/6639 useless extension candidates. Maximal degree in co-relation 76649. Up to 5892 conditions per place. [2024-06-21 20:39:41,537 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 600 selfloop transitions, 111 changer transitions 0/716 dead transitions. [2024-06-21 20:39:41,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 468 places, 716 transitions, 10459 flow [2024-06-21 20:39:41,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:39:41,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:39:41,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-21 20:39:41,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4497354497354497 [2024-06-21 20:39:41,538 INFO L175 Difference]: Start difference. First operand has 460 places, 688 transitions, 8887 flow. Second operand 9 states and 170 transitions. [2024-06-21 20:39:41,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 468 places, 716 transitions, 10459 flow [2024-06-21 20:39:48,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 461 places, 716 transitions, 10061 flow, removed 120 selfloop flow, removed 7 redundant places. [2024-06-21 20:39:48,483 INFO L231 Difference]: Finished difference. Result has 462 places, 688 transitions, 8717 flow [2024-06-21 20:39:48,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8489, PETRI_DIFFERENCE_MINUEND_PLACES=453, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=688, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=577, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8717, PETRI_PLACES=462, PETRI_TRANSITIONS=688} [2024-06-21 20:39:48,483 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 419 predicate places. [2024-06-21 20:39:48,483 INFO L495 AbstractCegarLoop]: Abstraction has has 462 places, 688 transitions, 8717 flow [2024-06-21 20:39:48,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:48,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:39:48,484 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:39:48,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-21 20:39:48,484 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:39:48,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:39:48,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1536923151, now seen corresponding path program 1 times [2024-06-21 20:39:48,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:39:48,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930226241] [2024-06-21 20:39:48,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:39:48,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:39:48,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:39:49,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:39:49,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:39:49,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930226241] [2024-06-21 20:39:49,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930226241] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:39:49,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:39:49,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:39:49,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289824094] [2024-06-21 20:39:49,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:39:49,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:39:49,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:39:49,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:39:49,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:39:49,461 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:39:49,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 462 places, 688 transitions, 8717 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:49,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:39:49,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:39:49,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:39:51,563 INFO L124 PetriNetUnfolderBase]: 4079/6652 cut-off events. [2024-06-21 20:39:51,563 INFO L125 PetriNetUnfolderBase]: For 1755527/1755531 co-relation queries the response was YES. [2024-06-21 20:39:51,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76997 conditions, 6652 events. 4079/6652 cut-off events. For 1755527/1755531 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 42875 event pairs, 825 based on Foata normal form. 3/6653 useless extension candidates. Maximal degree in co-relation 76781. Up to 6054 conditions per place. [2024-06-21 20:39:51,688 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 643 selfloop transitions, 70 changer transitions 0/718 dead transitions. [2024-06-21 20:39:51,688 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 718 transitions, 10435 flow [2024-06-21 20:39:51,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:39:51,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:39:51,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-21 20:39:51,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-21 20:39:51,689 INFO L175 Difference]: Start difference. First operand has 462 places, 688 transitions, 8717 flow. Second operand 9 states and 168 transitions. [2024-06-21 20:39:51,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 718 transitions, 10435 flow [2024-06-21 20:39:57,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 461 places, 718 transitions, 10157 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-21 20:39:57,493 INFO L231 Difference]: Finished difference. Result has 462 places, 691 transitions, 8755 flow [2024-06-21 20:39:57,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8439, PETRI_DIFFERENCE_MINUEND_PLACES=453, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=688, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=618, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8755, PETRI_PLACES=462, PETRI_TRANSITIONS=691} [2024-06-21 20:39:57,494 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 419 predicate places. [2024-06-21 20:39:57,494 INFO L495 AbstractCegarLoop]: Abstraction has has 462 places, 691 transitions, 8755 flow [2024-06-21 20:39:57,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:57,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:39:57,495 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:39:57,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-21 20:39:57,495 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:39:57,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:39:57,495 INFO L85 PathProgramCache]: Analyzing trace with hash -1536802995, now seen corresponding path program 1 times [2024-06-21 20:39:57,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:39:57,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476337067] [2024-06-21 20:39:57,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:39:57,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:39:57,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:39:58,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:39:58,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:39:58,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476337067] [2024-06-21 20:39:58,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476337067] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:39:58,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:39:58,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:39:58,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79345065] [2024-06-21 20:39:58,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:39:58,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:39:58,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:39:58,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:39:58,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:39:58,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:39:58,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 462 places, 691 transitions, 8755 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:58,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:39:58,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:39:58,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:40:00,515 INFO L124 PetriNetUnfolderBase]: 4089/6662 cut-off events. [2024-06-21 20:40:00,515 INFO L125 PetriNetUnfolderBase]: For 1792937/1792941 co-relation queries the response was YES. [2024-06-21 20:40:00,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77554 conditions, 6662 events. 4089/6662 cut-off events. For 1792937/1792941 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 42932 event pairs, 820 based on Foata normal form. 4/6664 useless extension candidates. Maximal degree in co-relation 77337. Up to 6099 conditions per place. [2024-06-21 20:40:00,640 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 645 selfloop transitions, 70 changer transitions 0/720 dead transitions. [2024-06-21 20:40:00,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 720 transitions, 10459 flow [2024-06-21 20:40:00,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:40:00,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:40:00,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-21 20:40:00,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-21 20:40:00,641 INFO L175 Difference]: Start difference. First operand has 462 places, 691 transitions, 8755 flow. Second operand 9 states and 165 transitions. [2024-06-21 20:40:00,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 720 transitions, 10459 flow [2024-06-21 20:40:07,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 463 places, 720 transitions, 10165 flow, removed 79 selfloop flow, removed 7 redundant places. [2024-06-21 20:40:07,172 INFO L231 Difference]: Finished difference. Result has 464 places, 695 transitions, 8760 flow [2024-06-21 20:40:07,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8461, PETRI_DIFFERENCE_MINUEND_PLACES=455, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=691, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=621, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8760, PETRI_PLACES=464, PETRI_TRANSITIONS=695} [2024-06-21 20:40:07,172 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 421 predicate places. [2024-06-21 20:40:07,172 INFO L495 AbstractCegarLoop]: Abstraction has has 464 places, 695 transitions, 8760 flow [2024-06-21 20:40:07,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:40:07,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:40:07,173 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:40:07,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-21 20:40:07,173 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:40:07,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:40:07,173 INFO L85 PathProgramCache]: Analyzing trace with hash 225164542, now seen corresponding path program 7 times [2024-06-21 20:40:07,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:40:07,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11989659] [2024-06-21 20:40:07,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:40:07,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:40:07,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:40:08,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:40:08,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:40:08,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11989659] [2024-06-21 20:40:08,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11989659] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:40:08,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:40:08,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:40:08,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498823762] [2024-06-21 20:40:08,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:40:08,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:40:08,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:40:08,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:40:08,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:40:08,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:40:08,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 464 places, 695 transitions, 8760 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:40:08,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:40:08,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:40:08,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:40:10,123 INFO L124 PetriNetUnfolderBase]: 4099/6674 cut-off events. [2024-06-21 20:40:10,123 INFO L125 PetriNetUnfolderBase]: For 1829480/1829482 co-relation queries the response was YES. [2024-06-21 20:40:10,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78598 conditions, 6674 events. 4099/6674 cut-off events. For 1829480/1829482 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 42880 event pairs, 791 based on Foata normal form. 2/6674 useless extension candidates. Maximal degree in co-relation 78380. Up to 5879 conditions per place. [2024-06-21 20:40:10,245 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 594 selfloop transitions, 125 changer transitions 0/724 dead transitions. [2024-06-21 20:40:10,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 472 places, 724 transitions, 10542 flow [2024-06-21 20:40:10,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:40:10,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:40:10,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-21 20:40:10,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-21 20:40:10,246 INFO L175 Difference]: Start difference. First operand has 464 places, 695 transitions, 8760 flow. Second operand 9 states and 169 transitions. [2024-06-21 20:40:10,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 472 places, 724 transitions, 10542 flow [2024-06-21 20:40:17,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 465 places, 724 transitions, 10275 flow, removed 67 selfloop flow, removed 7 redundant places. [2024-06-21 20:40:17,499 INFO L231 Difference]: Finished difference. Result has 466 places, 698 transitions, 8943 flow [2024-06-21 20:40:17,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8493, PETRI_DIFFERENCE_MINUEND_PLACES=457, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=695, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=570, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8943, PETRI_PLACES=466, PETRI_TRANSITIONS=698} [2024-06-21 20:40:17,500 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 423 predicate places. [2024-06-21 20:40:17,500 INFO L495 AbstractCegarLoop]: Abstraction has has 466 places, 698 transitions, 8943 flow [2024-06-21 20:40:17,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:40:17,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:40:17,500 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:40:17,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-21 20:40:17,500 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:40:17,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:40:17,501 INFO L85 PathProgramCache]: Analyzing trace with hash 229813085, now seen corresponding path program 2 times [2024-06-21 20:40:17,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:40:17,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909370542] [2024-06-21 20:40:17,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:40:17,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:40:17,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:40:18,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:40:18,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:40:18,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909370542] [2024-06-21 20:40:18,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909370542] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:40:18,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:40:18,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:40:18,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344236131] [2024-06-21 20:40:18,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:40:18,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:40:18,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:40:18,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:40:18,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:40:18,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:40:18,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 466 places, 698 transitions, 8943 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:40:18,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:40:18,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:40:18,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:40:20,768 INFO L124 PetriNetUnfolderBase]: 4120/6710 cut-off events. [2024-06-21 20:40:20,768 INFO L125 PetriNetUnfolderBase]: For 1878995/1878999 co-relation queries the response was YES. [2024-06-21 20:40:20,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80045 conditions, 6710 events. 4120/6710 cut-off events. For 1878995/1878999 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 43270 event pairs, 823 based on Foata normal form. 3/6711 useless extension candidates. Maximal degree in co-relation 79826. Up to 6087 conditions per place. [2024-06-21 20:40:20,889 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 628 selfloop transitions, 94 changer transitions 0/727 dead transitions. [2024-06-21 20:40:20,889 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 727 transitions, 11030 flow [2024-06-21 20:40:20,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:40:20,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:40:20,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-21 20:40:20,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-21 20:40:20,890 INFO L175 Difference]: Start difference. First operand has 466 places, 698 transitions, 8943 flow. Second operand 9 states and 166 transitions. [2024-06-21 20:40:20,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 727 transitions, 11030 flow [2024-06-21 20:40:27,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 467 places, 727 transitions, 10618 flow, removed 84 selfloop flow, removed 7 redundant places. [2024-06-21 20:40:27,512 INFO L231 Difference]: Finished difference. Result has 469 places, 705 transitions, 8997 flow [2024-06-21 20:40:27,512 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8531, PETRI_DIFFERENCE_MINUEND_PLACES=459, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=698, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=607, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8997, PETRI_PLACES=469, PETRI_TRANSITIONS=705} [2024-06-21 20:40:27,512 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 426 predicate places. [2024-06-21 20:40:27,512 INFO L495 AbstractCegarLoop]: Abstraction has has 469 places, 705 transitions, 8997 flow [2024-06-21 20:40:27,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:40:27,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:40:27,513 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:40:27,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-21 20:40:27,513 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:40:27,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:40:27,513 INFO L85 PathProgramCache]: Analyzing trace with hash 229813333, now seen corresponding path program 1 times [2024-06-21 20:40:27,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:40:27,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753480040] [2024-06-21 20:40:27,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:40:27,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:40:27,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:40:28,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:40:28,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:40:28,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753480040] [2024-06-21 20:40:28,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753480040] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:40:28,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:40:28,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:40:28,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034202744] [2024-06-21 20:40:28,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:40:28,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:40:28,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:40:28,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:40:28,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:40:28,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:40:28,657 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 469 places, 705 transitions, 8997 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:40:28,657 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:40:28,657 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:40:28,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:40:30,642 INFO L124 PetriNetUnfolderBase]: 4130/6727 cut-off events. [2024-06-21 20:40:30,642 INFO L125 PetriNetUnfolderBase]: For 1919601/1919605 co-relation queries the response was YES. [2024-06-21 20:40:30,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81014 conditions, 6727 events. 4130/6727 cut-off events. For 1919601/1919605 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 43379 event pairs, 814 based on Foata normal form. 6/6731 useless extension candidates. Maximal degree in co-relation 80793. Up to 6228 conditions per place. [2024-06-21 20:40:30,775 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 678 selfloop transitions, 47 changer transitions 0/730 dead transitions. [2024-06-21 20:40:30,776 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 477 places, 730 transitions, 10681 flow [2024-06-21 20:40:30,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:40:30,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:40:30,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-21 20:40:30,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-21 20:40:30,777 INFO L175 Difference]: Start difference. First operand has 469 places, 705 transitions, 8997 flow. Second operand 9 states and 159 transitions. [2024-06-21 20:40:30,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 477 places, 730 transitions, 10681 flow [2024-06-21 20:40:38,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 472 places, 730 transitions, 10467 flow, removed 59 selfloop flow, removed 5 redundant places. [2024-06-21 20:40:38,048 INFO L231 Difference]: Finished difference. Result has 473 places, 708 transitions, 9011 flow [2024-06-21 20:40:38,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8783, PETRI_DIFFERENCE_MINUEND_PLACES=464, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=705, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=658, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9011, PETRI_PLACES=473, PETRI_TRANSITIONS=708} [2024-06-21 20:40:38,049 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 430 predicate places. [2024-06-21 20:40:38,049 INFO L495 AbstractCegarLoop]: Abstraction has has 473 places, 708 transitions, 9011 flow [2024-06-21 20:40:38,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:40:38,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:40:38,049 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:40:38,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-21 20:40:38,050 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:40:38,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:40:38,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1305667777, now seen corresponding path program 5 times [2024-06-21 20:40:38,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:40:38,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892796195] [2024-06-21 20:40:38,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:40:38,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:40:38,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:40:39,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:40:39,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:40:39,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892796195] [2024-06-21 20:40:39,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892796195] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:40:39,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:40:39,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:40:39,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359914026] [2024-06-21 20:40:39,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:40:39,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:40:39,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:40:39,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:40:39,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:40:39,296 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:40:39,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 473 places, 708 transitions, 9011 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:40:39,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:40:39,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:40:39,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:40:41,453 INFO L124 PetriNetUnfolderBase]: 4143/6739 cut-off events. [2024-06-21 20:40:41,454 INFO L125 PetriNetUnfolderBase]: For 1944216/1944218 co-relation queries the response was YES. [2024-06-21 20:40:41,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81910 conditions, 6739 events. 4143/6739 cut-off events. For 1944216/1944218 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 43354 event pairs, 785 based on Foata normal form. 3/6740 useless extension candidates. Maximal degree in co-relation 81687. Up to 6079 conditions per place. [2024-06-21 20:40:41,577 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 615 selfloop transitions, 116 changer transitions 0/736 dead transitions. [2024-06-21 20:40:41,577 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 481 places, 736 transitions, 11145 flow [2024-06-21 20:40:41,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:40:41,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:40:41,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-21 20:40:41,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-21 20:40:41,578 INFO L175 Difference]: Start difference. First operand has 473 places, 708 transitions, 9011 flow. Second operand 9 states and 163 transitions. [2024-06-21 20:40:41,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 481 places, 736 transitions, 11145 flow [2024-06-21 20:40:48,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 474 places, 736 transitions, 10939 flow, removed 58 selfloop flow, removed 7 redundant places. [2024-06-21 20:40:48,740 INFO L231 Difference]: Finished difference. Result has 475 places, 714 transitions, 9333 flow [2024-06-21 20:40:48,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8805, PETRI_DIFFERENCE_MINUEND_PLACES=466, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=708, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=595, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9333, PETRI_PLACES=475, PETRI_TRANSITIONS=714} [2024-06-21 20:40:48,741 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 432 predicate places. [2024-06-21 20:40:48,741 INFO L495 AbstractCegarLoop]: Abstraction has has 475 places, 714 transitions, 9333 flow [2024-06-21 20:40:48,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:40:48,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:40:48,741 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:40:48,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-21 20:40:48,742 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:40:48,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:40:48,742 INFO L85 PathProgramCache]: Analyzing trace with hash -1532161768, now seen corresponding path program 8 times [2024-06-21 20:40:48,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:40:48,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045758293] [2024-06-21 20:40:48,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:40:48,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:40:48,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:40:49,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:40:49,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:40:49,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045758293] [2024-06-21 20:40:49,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045758293] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:40:49,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:40:49,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:40:49,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598125294] [2024-06-21 20:40:49,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:40:49,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:40:49,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:40:49,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:40:49,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:40:49,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:40:49,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 475 places, 714 transitions, 9333 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:40:49,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:40:49,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:40:49,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:40:51,825 INFO L124 PetriNetUnfolderBase]: 4169/6780 cut-off events. [2024-06-21 20:40:51,826 INFO L125 PetriNetUnfolderBase]: For 2015669/2015671 co-relation queries the response was YES. [2024-06-21 20:40:51,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83667 conditions, 6780 events. 4169/6780 cut-off events. For 2015669/2015671 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 43649 event pairs, 796 based on Foata normal form. 2/6780 useless extension candidates. Maximal degree in co-relation 83443. Up to 5868 conditions per place. [2024-06-21 20:40:51,974 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 576 selfloop transitions, 163 changer transitions 0/744 dead transitions. [2024-06-21 20:40:51,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 483 places, 744 transitions, 11670 flow [2024-06-21 20:40:51,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:40:51,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:40:51,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-21 20:40:51,975 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4497354497354497 [2024-06-21 20:40:51,975 INFO L175 Difference]: Start difference. First operand has 475 places, 714 transitions, 9333 flow. Second operand 9 states and 170 transitions. [2024-06-21 20:40:51,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 483 places, 744 transitions, 11670 flow [2024-06-21 20:41:00,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 478 places, 744 transitions, 11385 flow, removed 79 selfloop flow, removed 5 redundant places. [2024-06-21 20:41:00,616 INFO L231 Difference]: Finished difference. Result has 479 places, 720 transitions, 9780 flow [2024-06-21 20:41:00,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9048, PETRI_DIFFERENCE_MINUEND_PLACES=470, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=714, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=554, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9780, PETRI_PLACES=479, PETRI_TRANSITIONS=720} [2024-06-21 20:41:00,616 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 436 predicate places. [2024-06-21 20:41:00,617 INFO L495 AbstractCegarLoop]: Abstraction has has 479 places, 720 transitions, 9780 flow [2024-06-21 20:41:00,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:41:00,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:41:00,617 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:41:00,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-21 20:41:00,617 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:41:00,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:41:00,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1532161365, now seen corresponding path program 3 times [2024-06-21 20:41:00,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:41:00,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117354716] [2024-06-21 20:41:00,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:41:00,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:41:00,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:41:01,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:41:01,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:41:01,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117354716] [2024-06-21 20:41:01,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117354716] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:41:01,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:41:01,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:41:01,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460553661] [2024-06-21 20:41:01,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:41:01,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:41:01,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:41:01,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:41:01,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:41:01,688 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:41:01,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 479 places, 720 transitions, 9780 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:41:01,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:41:01,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:41:01,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:41:03,951 INFO L124 PetriNetUnfolderBase]: 4163/6778 cut-off events. [2024-06-21 20:41:03,951 INFO L125 PetriNetUnfolderBase]: For 2033583/2033587 co-relation queries the response was YES. [2024-06-21 20:41:04,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84216 conditions, 6778 events. 4163/6778 cut-off events. For 2033583/2033587 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 43810 event pairs, 823 based on Foata normal form. 4/6780 useless extension candidates. Maximal degree in co-relation 83990. Up to 6173 conditions per place. [2024-06-21 20:41:04,075 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 650 selfloop transitions, 87 changer transitions 0/742 dead transitions. [2024-06-21 20:41:04,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 487 places, 742 transitions, 11395 flow [2024-06-21 20:41:04,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:41:04,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:41:04,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-21 20:41:04,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-21 20:41:04,077 INFO L175 Difference]: Start difference. First operand has 479 places, 720 transitions, 9780 flow. Second operand 9 states and 165 transitions. [2024-06-21 20:41:04,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 487 places, 742 transitions, 11395 flow [2024-06-21 20:41:12,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 482 places, 742 transitions, 10917 flow, removed 151 selfloop flow, removed 5 redundant places. [2024-06-21 20:41:12,502 INFO L231 Difference]: Finished difference. Result has 483 places, 720 transitions, 9485 flow [2024-06-21 20:41:12,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9302, PETRI_DIFFERENCE_MINUEND_PLACES=474, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=720, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=633, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9485, PETRI_PLACES=483, PETRI_TRANSITIONS=720} [2024-06-21 20:41:12,503 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 440 predicate places. [2024-06-21 20:41:12,503 INFO L495 AbstractCegarLoop]: Abstraction has has 483 places, 720 transitions, 9485 flow [2024-06-21 20:41:12,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:41:12,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:41:12,503 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:41:12,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-21 20:41:12,503 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:41:12,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:41:12,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1532167131, now seen corresponding path program 6 times [2024-06-21 20:41:12,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:41:12,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331643266] [2024-06-21 20:41:12,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:41:12,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:41:12,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:41:13,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:41:13,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:41:13,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331643266] [2024-06-21 20:41:13,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331643266] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:41:13,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:41:13,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:41:13,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371589548] [2024-06-21 20:41:13,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:41:13,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:41:13,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:41:13,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:41:13,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:41:13,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:41:13,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 483 places, 720 transitions, 9485 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:41:13,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:41:13,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:41:13,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:41:15,750 INFO L124 PetriNetUnfolderBase]: 4160/6767 cut-off events. [2024-06-21 20:41:15,751 INFO L125 PetriNetUnfolderBase]: For 2010099/2010101 co-relation queries the response was YES. [2024-06-21 20:41:15,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83320 conditions, 6767 events. 4160/6767 cut-off events. For 2010099/2010101 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 43502 event pairs, 752 based on Foata normal form. 3/6768 useless extension candidates. Maximal degree in co-relation 83092. Up to 6130 conditions per place. [2024-06-21 20:41:15,882 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 629 selfloop transitions, 107 changer transitions 0/741 dead transitions. [2024-06-21 20:41:15,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 491 places, 741 transitions, 11049 flow [2024-06-21 20:41:15,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:41:15,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:41:15,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-21 20:41:15,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-21 20:41:15,884 INFO L175 Difference]: Start difference. First operand has 483 places, 720 transitions, 9485 flow. Second operand 9 states and 161 transitions. [2024-06-21 20:41:15,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 491 places, 741 transitions, 11049 flow [2024-06-21 20:41:24,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 483 places, 741 transitions, 10754 flow, removed 54 selfloop flow, removed 8 redundant places. [2024-06-21 20:41:24,131 INFO L231 Difference]: Finished difference. Result has 484 places, 720 transitions, 9410 flow [2024-06-21 20:41:24,132 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9190, PETRI_DIFFERENCE_MINUEND_PLACES=475, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=720, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=613, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9410, PETRI_PLACES=484, PETRI_TRANSITIONS=720} [2024-06-21 20:41:24,132 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 441 predicate places. [2024-06-21 20:41:24,132 INFO L495 AbstractCegarLoop]: Abstraction has has 484 places, 720 transitions, 9410 flow [2024-06-21 20:41:24,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:41:24,132 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:41:24,132 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:41:24,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-21 20:41:24,132 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:41:24,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:41:24,133 INFO L85 PathProgramCache]: Analyzing trace with hash 229800592, now seen corresponding path program 9 times [2024-06-21 20:41:24,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:41:24,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597077480] [2024-06-21 20:41:24,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:41:24,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:41:24,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:41:25,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:41:25,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:41:25,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597077480] [2024-06-21 20:41:25,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597077480] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:41:25,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:41:25,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:41:25,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522462133] [2024-06-21 20:41:25,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:41:25,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:41:25,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:41:25,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:41:25,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:41:25,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:41:25,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 484 places, 720 transitions, 9410 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:41:25,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:41:25,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:41:25,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:41:27,334 INFO L124 PetriNetUnfolderBase]: 4154/6760 cut-off events. [2024-06-21 20:41:27,335 INFO L125 PetriNetUnfolderBase]: For 2023536/2023538 co-relation queries the response was YES. [2024-06-21 20:41:27,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82921 conditions, 6760 events. 4154/6760 cut-off events. For 2023536/2023538 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 43546 event pairs, 793 based on Foata normal form. 2/6760 useless extension candidates. Maximal degree in co-relation 82692. Up to 5851 conditions per place. [2024-06-21 20:41:27,465 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 579 selfloop transitions, 159 changer transitions 0/743 dead transitions. [2024-06-21 20:41:27,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 492 places, 743 transitions, 11055 flow [2024-06-21 20:41:27,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:41:27,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:41:27,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-21 20:41:27,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-21 20:41:27,467 INFO L175 Difference]: Start difference. First operand has 484 places, 720 transitions, 9410 flow. Second operand 9 states and 169 transitions. [2024-06-21 20:41:27,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 492 places, 743 transitions, 11055 flow [2024-06-21 20:41:33,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 484 places, 743 transitions, 10670 flow, removed 76 selfloop flow, removed 8 redundant places. [2024-06-21 20:41:33,202 INFO L231 Difference]: Finished difference. Result has 485 places, 720 transitions, 9349 flow [2024-06-21 20:41:33,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9025, PETRI_DIFFERENCE_MINUEND_PLACES=476, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=720, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=561, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9349, PETRI_PLACES=485, PETRI_TRANSITIONS=720} [2024-06-21 20:41:33,202 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 442 predicate places. [2024-06-21 20:41:33,202 INFO L495 AbstractCegarLoop]: Abstraction has has 485 places, 720 transitions, 9349 flow [2024-06-21 20:41:33,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:41:33,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:41:33,203 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:41:33,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-21 20:41:33,203 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:41:33,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:41:33,203 INFO L85 PathProgramCache]: Analyzing trace with hash -1177902333, now seen corresponding path program 7 times [2024-06-21 20:41:33,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:41:33,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987670519] [2024-06-21 20:41:33,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:41:33,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:41:33,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:41:34,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:41:34,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:41:34,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987670519] [2024-06-21 20:41:34,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987670519] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:41:34,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:41:34,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:41:34,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236088556] [2024-06-21 20:41:34,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:41:34,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:41:34,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:41:34,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:41:34,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:41:34,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:41:34,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 485 places, 720 transitions, 9349 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:41:34,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:41:34,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:41:34,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:41:36,481 INFO L124 PetriNetUnfolderBase]: 4172/6788 cut-off events. [2024-06-21 20:41:36,481 INFO L125 PetriNetUnfolderBase]: For 2048451/2048451 co-relation queries the response was YES. [2024-06-21 20:41:36,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83585 conditions, 6788 events. 4172/6788 cut-off events. For 2048451/2048451 co-relation queries the response was YES. Maximal size of possible extension queue 456. Compared 43814 event pairs, 789 based on Foata normal form. 1/6787 useless extension candidates. Maximal degree in co-relation 83355. Up to 6262 conditions per place. [2024-06-21 20:41:36,616 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 672 selfloop transitions, 70 changer transitions 0/747 dead transitions. [2024-06-21 20:41:36,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 494 places, 747 transitions, 11526 flow [2024-06-21 20:41:36,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:41:36,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:41:36,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 171 transitions. [2024-06-21 20:41:36,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40714285714285714 [2024-06-21 20:41:36,617 INFO L175 Difference]: Start difference. First operand has 485 places, 720 transitions, 9349 flow. Second operand 10 states and 171 transitions. [2024-06-21 20:41:36,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 494 places, 747 transitions, 11526 flow [2024-06-21 20:41:45,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 485 places, 747 transitions, 11075 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-21 20:41:45,396 INFO L231 Difference]: Finished difference. Result has 487 places, 729 transitions, 9391 flow [2024-06-21 20:41:45,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8898, PETRI_DIFFERENCE_MINUEND_PLACES=476, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=720, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=653, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9391, PETRI_PLACES=487, PETRI_TRANSITIONS=729} [2024-06-21 20:41:45,397 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 444 predicate places. [2024-06-21 20:41:45,397 INFO L495 AbstractCegarLoop]: Abstraction has has 487 places, 729 transitions, 9391 flow [2024-06-21 20:41:45,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:41:45,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:41:45,397 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:41:45,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-21 20:41:45,398 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:41:45,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:41:45,398 INFO L85 PathProgramCache]: Analyzing trace with hash -1174594323, now seen corresponding path program 8 times [2024-06-21 20:41:45,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:41:45,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992202307] [2024-06-21 20:41:45,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:41:45,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:41:45,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:41:46,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:41:46,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:41:46,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992202307] [2024-06-21 20:41:46,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992202307] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:41:46,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:41:46,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:41:46,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352461544] [2024-06-21 20:41:46,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:41:46,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:41:46,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:41:46,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:41:46,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:41:46,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:41:46,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 487 places, 729 transitions, 9391 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:41:46,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:41:46,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:41:46,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:41:48,792 INFO L124 PetriNetUnfolderBase]: 4169/6784 cut-off events. [2024-06-21 20:41:48,793 INFO L125 PetriNetUnfolderBase]: For 2064730/2064730 co-relation queries the response was YES. [2024-06-21 20:41:48,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83278 conditions, 6784 events. 4169/6784 cut-off events. For 2064730/2064730 co-relation queries the response was YES. Maximal size of possible extension queue 456. Compared 43801 event pairs, 753 based on Foata normal form. 1/6783 useless extension candidates. Maximal degree in co-relation 83047. Up to 6269 conditions per place. [2024-06-21 20:41:48,934 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 676 selfloop transitions, 64 changer transitions 0/745 dead transitions. [2024-06-21 20:41:48,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 495 places, 745 transitions, 10931 flow [2024-06-21 20:41:48,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:41:48,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:41:48,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-21 20:41:48,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41005291005291006 [2024-06-21 20:41:48,935 INFO L175 Difference]: Start difference. First operand has 487 places, 729 transitions, 9391 flow. Second operand 9 states and 155 transitions. [2024-06-21 20:41:48,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 495 places, 745 transitions, 10931 flow [2024-06-21 20:41:57,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 489 places, 745 transitions, 10568 flow, removed 142 selfloop flow, removed 6 redundant places. [2024-06-21 20:41:57,405 INFO L231 Difference]: Finished difference. Result has 490 places, 729 transitions, 9162 flow [2024-06-21 20:41:57,406 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9028, PETRI_DIFFERENCE_MINUEND_PLACES=481, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=729, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=665, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9162, PETRI_PLACES=490, PETRI_TRANSITIONS=729} [2024-06-21 20:41:57,406 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 447 predicate places. [2024-06-21 20:41:57,406 INFO L495 AbstractCegarLoop]: Abstraction has has 490 places, 729 transitions, 9162 flow [2024-06-21 20:41:57,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:41:57,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:41:57,406 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:41:57,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-21 20:41:57,407 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:41:57,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:41:57,407 INFO L85 PathProgramCache]: Analyzing trace with hash -1166163439, now seen corresponding path program 2 times [2024-06-21 20:41:57,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:41:57,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681766526] [2024-06-21 20:41:57,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:41:57,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:41:57,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:41:58,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:41:58,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:41:58,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681766526] [2024-06-21 20:41:58,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681766526] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:41:58,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:41:58,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:41:58,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135810138] [2024-06-21 20:41:58,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:41:58,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:41:58,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:41:58,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:41:58,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:41:58,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:41:58,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 490 places, 729 transitions, 9162 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:41:58,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:41:58,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:41:58,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:42:00,664 INFO L124 PetriNetUnfolderBase]: 4190/6821 cut-off events. [2024-06-21 20:42:00,664 INFO L125 PetriNetUnfolderBase]: For 2113029/2113033 co-relation queries the response was YES. [2024-06-21 20:42:00,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84159 conditions, 6821 events. 4190/6821 cut-off events. For 2113029/2113033 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 44146 event pairs, 785 based on Foata normal form. 5/6824 useless extension candidates. Maximal degree in co-relation 83926. Up to 6262 conditions per place. [2024-06-21 20:42:00,807 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 682 selfloop transitions, 73 changer transitions 0/760 dead transitions. [2024-06-21 20:42:00,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 498 places, 760 transitions, 11764 flow [2024-06-21 20:42:00,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:42:00,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:42:00,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-21 20:42:00,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-21 20:42:00,808 INFO L175 Difference]: Start difference. First operand has 490 places, 729 transitions, 9162 flow. Second operand 9 states and 161 transitions. [2024-06-21 20:42:00,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 498 places, 760 transitions, 11764 flow [2024-06-21 20:42:08,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 491 places, 760 transitions, 11630 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-21 20:42:08,129 INFO L231 Difference]: Finished difference. Result has 493 places, 741 transitions, 9619 flow [2024-06-21 20:42:08,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9028, PETRI_DIFFERENCE_MINUEND_PLACES=483, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=729, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=662, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9619, PETRI_PLACES=493, PETRI_TRANSITIONS=741} [2024-06-21 20:42:08,130 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 450 predicate places. [2024-06-21 20:42:08,130 INFO L495 AbstractCegarLoop]: Abstraction has has 493 places, 741 transitions, 9619 flow [2024-06-21 20:42:08,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:42:08,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:42:08,130 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:42:08,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-21 20:42:08,130 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:42:08,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:42:08,131 INFO L85 PathProgramCache]: Analyzing trace with hash -1166163873, now seen corresponding path program 9 times [2024-06-21 20:42:08,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:42:08,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853029712] [2024-06-21 20:42:08,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:42:08,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:42:08,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:42:09,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:42:09,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:42:09,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853029712] [2024-06-21 20:42:09,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853029712] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:42:09,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:42:09,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:42:09,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432974745] [2024-06-21 20:42:09,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:42:09,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:42:09,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:42:09,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:42:09,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:42:09,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:42:09,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 493 places, 741 transitions, 9619 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:42:09,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:42:09,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:42:09,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:42:11,404 INFO L124 PetriNetUnfolderBase]: 4211/6848 cut-off events. [2024-06-21 20:42:11,404 INFO L125 PetriNetUnfolderBase]: For 2171237/2171239 co-relation queries the response was YES. [2024-06-21 20:42:11,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85630 conditions, 6848 events. 4211/6848 cut-off events. For 2171237/2171239 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 44283 event pairs, 769 based on Foata normal form. 3/6849 useless extension candidates. Maximal degree in co-relation 85395. Up to 6043 conditions per place. [2024-06-21 20:42:11,543 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 585 selfloop transitions, 179 changer transitions 0/769 dead transitions. [2024-06-21 20:42:11,543 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 501 places, 769 transitions, 12306 flow [2024-06-21 20:42:11,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:42:11,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:42:11,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-21 20:42:11,545 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-21 20:42:11,545 INFO L175 Difference]: Start difference. First operand has 493 places, 741 transitions, 9619 flow. Second operand 9 states and 163 transitions. [2024-06-21 20:42:11,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 501 places, 769 transitions, 12306 flow [2024-06-21 20:42:19,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 497 places, 769 transitions, 12079 flow, removed 82 selfloop flow, removed 4 redundant places. [2024-06-21 20:42:19,394 INFO L231 Difference]: Finished difference. Result has 498 places, 750 transitions, 10230 flow [2024-06-21 20:42:19,394 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9392, PETRI_DIFFERENCE_MINUEND_PLACES=489, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=741, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=568, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10230, PETRI_PLACES=498, PETRI_TRANSITIONS=750} [2024-06-21 20:42:19,395 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 455 predicate places. [2024-06-21 20:42:19,395 INFO L495 AbstractCegarLoop]: Abstraction has has 498 places, 750 transitions, 10230 flow [2024-06-21 20:42:19,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:42:19,395 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:42:19,395 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:42:19,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-21 20:42:19,395 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:42:19,395 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:42:19,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1165866769, now seen corresponding path program 3 times [2024-06-21 20:42:19,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:42:19,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227214368] [2024-06-21 20:42:19,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:42:19,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:42:19,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:42:20,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:42:20,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:42:20,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227214368] [2024-06-21 20:42:20,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227214368] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:42:20,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:42:20,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:42:20,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449186182] [2024-06-21 20:42:20,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:42:20,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:42:20,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:42:20,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:42:20,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:42:20,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:42:20,621 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 498 places, 750 transitions, 10230 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:42:20,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:42:20,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:42:20,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:42:22,932 INFO L124 PetriNetUnfolderBase]: 4208/6846 cut-off events. [2024-06-21 20:42:22,932 INFO L125 PetriNetUnfolderBase]: For 2192583/2192587 co-relation queries the response was YES. [2024-06-21 20:42:23,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86189 conditions, 6846 events. 4208/6846 cut-off events. For 2192583/2192587 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 44250 event pairs, 821 based on Foata normal form. 5/6849 useless extension candidates. Maximal degree in co-relation 85952. Up to 6288 conditions per place. [2024-06-21 20:42:23,058 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 687 selfloop transitions, 76 changer transitions 0/768 dead transitions. [2024-06-21 20:42:23,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 506 places, 768 transitions, 12137 flow [2024-06-21 20:42:23,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:42:23,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:42:23,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-21 20:42:23,060 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-21 20:42:23,060 INFO L175 Difference]: Start difference. First operand has 498 places, 750 transitions, 10230 flow. Second operand 9 states and 159 transitions. [2024-06-21 20:42:23,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 506 places, 768 transitions, 12137 flow [2024-06-21 20:42:31,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 502 places, 768 transitions, 11682 flow, removed 150 selfloop flow, removed 4 redundant places. [2024-06-21 20:42:31,033 INFO L231 Difference]: Finished difference. Result has 503 places, 750 transitions, 9933 flow [2024-06-21 20:42:31,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9775, PETRI_DIFFERENCE_MINUEND_PLACES=494, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=750, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=674, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9933, PETRI_PLACES=503, PETRI_TRANSITIONS=750} [2024-06-21 20:42:31,033 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 460 predicate places. [2024-06-21 20:42:31,033 INFO L495 AbstractCegarLoop]: Abstraction has has 503 places, 750 transitions, 9933 flow [2024-06-21 20:42:31,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:42:31,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:42:31,034 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:42:31,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-21 20:42:31,034 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:42:31,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:42:31,034 INFO L85 PathProgramCache]: Analyzing trace with hash -1178169460, now seen corresponding path program 10 times [2024-06-21 20:42:31,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:42:31,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27864744] [2024-06-21 20:42:31,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:42:31,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:42:31,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:42:32,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:42:32,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:42:32,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27864744] [2024-06-21 20:42:32,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27864744] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:42:32,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:42:32,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:42:32,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220427904] [2024-06-21 20:42:32,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:42:32,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:42:32,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:42:32,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:42:32,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:42:32,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:42:32,292 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 503 places, 750 transitions, 9933 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:42:32,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:42:32,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:42:32,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:42:34,555 INFO L124 PetriNetUnfolderBase]: 4218/6856 cut-off events. [2024-06-21 20:42:34,555 INFO L125 PetriNetUnfolderBase]: For 2217956/2217956 co-relation queries the response was YES. [2024-06-21 20:42:34,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86177 conditions, 6856 events. 4218/6856 cut-off events. For 2217956/2217956 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 44213 event pairs, 752 based on Foata normal form. 2/6856 useless extension candidates. Maximal degree in co-relation 85938. Up to 6334 conditions per place. [2024-06-21 20:42:34,712 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 701 selfloop transitions, 64 changer transitions 0/770 dead transitions. [2024-06-21 20:42:34,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 511 places, 770 transitions, 11749 flow [2024-06-21 20:42:34,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:42:34,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:42:34,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-21 20:42:34,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-06-21 20:42:34,714 INFO L175 Difference]: Start difference. First operand has 503 places, 750 transitions, 9933 flow. Second operand 9 states and 156 transitions. [2024-06-21 20:42:34,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 511 places, 770 transitions, 11749 flow [2024-06-21 20:42:42,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 504 places, 770 transitions, 11595 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-21 20:42:42,742 INFO L231 Difference]: Finished difference. Result has 505 places, 753 transitions, 10117 flow [2024-06-21 20:42:42,742 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9779, PETRI_DIFFERENCE_MINUEND_PLACES=496, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=750, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=686, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10117, PETRI_PLACES=505, PETRI_TRANSITIONS=753} [2024-06-21 20:42:42,742 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 462 predicate places. [2024-06-21 20:42:42,742 INFO L495 AbstractCegarLoop]: Abstraction has has 505 places, 753 transitions, 10117 flow [2024-06-21 20:42:42,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:42:42,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:42:42,743 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:42:42,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-21 20:42:42,743 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:42:42,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:42:42,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1166283843, now seen corresponding path program 10 times [2024-06-21 20:42:42,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:42:42,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140329122] [2024-06-21 20:42:42,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:42:42,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:42:42,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:42:43,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:42:43,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:42:43,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140329122] [2024-06-21 20:42:43,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140329122] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:42:43,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:42:43,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:42:43,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98901479] [2024-06-21 20:42:43,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:42:43,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:42:43,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:42:43,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:42:43,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:42:43,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:42:43,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 505 places, 753 transitions, 10117 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:42:43,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:42:43,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:42:43,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:42:46,252 INFO L124 PetriNetUnfolderBase]: 4215/6856 cut-off events. [2024-06-21 20:42:46,252 INFO L125 PetriNetUnfolderBase]: For 2231436/2231436 co-relation queries the response was YES. [2024-06-21 20:42:46,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86596 conditions, 6856 events. 4215/6856 cut-off events. For 2231436/2231436 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 44288 event pairs, 752 based on Foata normal form. 1/6855 useless extension candidates. Maximal degree in co-relation 86356. Up to 6316 conditions per place. [2024-06-21 20:42:46,399 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 694 selfloop transitions, 70 changer transitions 0/769 dead transitions. [2024-06-21 20:42:46,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 513 places, 769 transitions, 11705 flow [2024-06-21 20:42:46,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:42:46,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:42:46,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-21 20:42:46,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-06-21 20:42:46,401 INFO L175 Difference]: Start difference. First operand has 505 places, 753 transitions, 10117 flow. Second operand 9 states and 156 transitions. [2024-06-21 20:42:46,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 513 places, 769 transitions, 11705 flow [2024-06-21 20:42:54,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 506 places, 769 transitions, 11295 flow, removed 143 selfloop flow, removed 7 redundant places. [2024-06-21 20:42:54,296 INFO L231 Difference]: Finished difference. Result has 507 places, 753 transitions, 9853 flow [2024-06-21 20:42:54,296 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9707, PETRI_DIFFERENCE_MINUEND_PLACES=498, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=753, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=683, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9853, PETRI_PLACES=507, PETRI_TRANSITIONS=753} [2024-06-21 20:42:54,297 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 464 predicate places. [2024-06-21 20:42:54,297 INFO L495 AbstractCegarLoop]: Abstraction has has 507 places, 753 transitions, 9853 flow [2024-06-21 20:42:54,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:42:54,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:42:54,297 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:42:54,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-21 20:42:54,297 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:42:54,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:42:54,298 INFO L85 PathProgramCache]: Analyzing trace with hash -1166163687, now seen corresponding path program 4 times [2024-06-21 20:42:54,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:42:54,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302115658] [2024-06-21 20:42:54,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:42:54,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:42:54,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:42:55,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:42:55,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:42:55,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302115658] [2024-06-21 20:42:55,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302115658] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:42:55,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:42:55,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:42:55,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454363804] [2024-06-21 20:42:55,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:42:55,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:42:55,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:42:55,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:42:55,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:42:55,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:42:55,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 507 places, 753 transitions, 9853 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:42:55,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:42:55,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:42:55,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:42:57,622 INFO L124 PetriNetUnfolderBase]: 4236/6893 cut-off events. [2024-06-21 20:42:57,623 INFO L125 PetriNetUnfolderBase]: For 2270611/2270615 co-relation queries the response was YES. [2024-06-21 20:42:57,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86815 conditions, 6893 events. 4236/6893 cut-off events. For 2270611/2270615 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 44651 event pairs, 797 based on Foata normal form. 3/6894 useless extension candidates. Maximal degree in co-relation 86574. Up to 6159 conditions per place. [2024-06-21 20:42:57,770 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 644 selfloop transitions, 129 changer transitions 0/778 dead transitions. [2024-06-21 20:42:57,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 515 places, 778 transitions, 12081 flow [2024-06-21 20:42:57,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:42:57,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:42:57,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-21 20:42:57,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-21 20:42:57,772 INFO L175 Difference]: Start difference. First operand has 507 places, 753 transitions, 9853 flow. Second operand 9 states and 164 transitions. [2024-06-21 20:42:57,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 515 places, 778 transitions, 12081 flow [2024-06-21 20:43:05,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 505 places, 778 transitions, 11842 flow, removed 20 selfloop flow, removed 10 redundant places. [2024-06-21 20:43:05,655 INFO L231 Difference]: Finished difference. Result has 507 places, 760 transitions, 10204 flow [2024-06-21 20:43:05,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9614, PETRI_DIFFERENCE_MINUEND_PLACES=497, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=753, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=627, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10204, PETRI_PLACES=507, PETRI_TRANSITIONS=760} [2024-06-21 20:43:05,656 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 464 predicate places. [2024-06-21 20:43:05,656 INFO L495 AbstractCegarLoop]: Abstraction has has 507 places, 760 transitions, 10204 flow [2024-06-21 20:43:05,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:05,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:43:05,656 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:43:05,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-21 20:43:05,656 INFO L420 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:43:05,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:43:05,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1174444407, now seen corresponding path program 5 times [2024-06-21 20:43:05,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:43:05,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191495996] [2024-06-21 20:43:05,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:43:05,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:43:05,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:43:06,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:43:06,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:43:06,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191495996] [2024-06-21 20:43:06,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191495996] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:43:06,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:43:06,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:43:06,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667481671] [2024-06-21 20:43:06,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:43:06,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:43:06,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:43:06,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:43:06,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:43:06,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:43:06,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 507 places, 760 transitions, 10204 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:06,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:43:06,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:43:06,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:43:09,126 INFO L124 PetriNetUnfolderBase]: 4246/6905 cut-off events. [2024-06-21 20:43:09,126 INFO L125 PetriNetUnfolderBase]: For 2327794/2327798 co-relation queries the response was YES. [2024-06-21 20:43:09,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88356 conditions, 6905 events. 4246/6905 cut-off events. For 2327794/2327798 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 44706 event pairs, 797 based on Foata normal form. 4/6907 useless extension candidates. Maximal degree in co-relation 88116. Up to 6248 conditions per place. [2024-06-21 20:43:09,277 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 670 selfloop transitions, 107 changer transitions 0/782 dead transitions. [2024-06-21 20:43:09,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 515 places, 782 transitions, 12064 flow [2024-06-21 20:43:09,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:43:09,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:43:09,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-21 20:43:09,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 20:43:09,278 INFO L175 Difference]: Start difference. First operand has 507 places, 760 transitions, 10204 flow. Second operand 9 states and 162 transitions. [2024-06-21 20:43:09,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 515 places, 782 transitions, 12064 flow [2024-06-21 20:43:18,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 510 places, 782 transitions, 11777 flow, removed 81 selfloop flow, removed 5 redundant places. [2024-06-21 20:43:18,163 INFO L231 Difference]: Finished difference. Result has 511 places, 764 transitions, 10328 flow [2024-06-21 20:43:18,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9949, PETRI_DIFFERENCE_MINUEND_PLACES=502, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=760, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=653, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10328, PETRI_PLACES=511, PETRI_TRANSITIONS=764} [2024-06-21 20:43:18,164 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 468 predicate places. [2024-06-21 20:43:18,164 INFO L495 AbstractCegarLoop]: Abstraction has has 511 places, 764 transitions, 10328 flow [2024-06-21 20:43:18,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:18,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:43:18,165 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:43:18,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-21 20:43:18,165 INFO L420 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:43:18,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:43:18,166 INFO L85 PathProgramCache]: Analyzing trace with hash -1020117930, now seen corresponding path program 11 times [2024-06-21 20:43:18,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:43:18,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307852662] [2024-06-21 20:43:18,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:43:18,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:43:18,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:43:19,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:43:19,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:43:19,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307852662] [2024-06-21 20:43:19,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307852662] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:43:19,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:43:19,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:43:19,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978505961] [2024-06-21 20:43:19,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:43:19,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:43:19,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:43:19,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:43:19,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:43:19,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:43:19,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 511 places, 764 transitions, 10328 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:19,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:43:19,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:43:19,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:43:21,426 INFO L124 PetriNetUnfolderBase]: 4288/6967 cut-off events. [2024-06-21 20:43:21,426 INFO L125 PetriNetUnfolderBase]: For 2417412/2417414 co-relation queries the response was YES. [2024-06-21 20:43:21,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90829 conditions, 6967 events. 4288/6967 cut-off events. For 2417412/2417414 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 45052 event pairs, 787 based on Foata normal form. 2/6967 useless extension candidates. Maximal degree in co-relation 90587. Up to 5883 conditions per place. [2024-06-21 20:43:21,574 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 585 selfloop transitions, 204 changer transitions 0/794 dead transitions. [2024-06-21 20:43:21,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 519 places, 794 transitions, 13322 flow [2024-06-21 20:43:21,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:43:21,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:43:21,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-21 20:43:21,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-21 20:43:21,576 INFO L175 Difference]: Start difference. First operand has 511 places, 764 transitions, 10328 flow. Second operand 9 states and 168 transitions. [2024-06-21 20:43:21,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 519 places, 794 transitions, 13322 flow [2024-06-21 20:43:30,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 512 places, 794 transitions, 12983 flow, removed 65 selfloop flow, removed 7 redundant places. [2024-06-21 20:43:30,913 INFO L231 Difference]: Finished difference. Result has 513 places, 773 transitions, 11021 flow [2024-06-21 20:43:30,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9989, PETRI_DIFFERENCE_MINUEND_PLACES=504, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=764, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=198, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=566, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11021, PETRI_PLACES=513, PETRI_TRANSITIONS=773} [2024-06-21 20:43:30,914 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 470 predicate places. [2024-06-21 20:43:30,914 INFO L495 AbstractCegarLoop]: Abstraction has has 513 places, 773 transitions, 11021 flow [2024-06-21 20:43:30,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:30,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:43:30,914 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:43:30,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-21 20:43:30,914 INFO L420 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:43:30,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:43:30,915 INFO L85 PathProgramCache]: Analyzing trace with hash -1174450390, now seen corresponding path program 12 times [2024-06-21 20:43:30,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:43:30,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924225471] [2024-06-21 20:43:30,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:43:30,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:43:30,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:43:32,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:43:32,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:43:32,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924225471] [2024-06-21 20:43:32,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924225471] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:43:32,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:43:32,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:43:32,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663926740] [2024-06-21 20:43:32,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:43:32,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:43:32,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:43:32,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:43:32,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:43:32,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:43:32,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 513 places, 773 transitions, 11021 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:32,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:43:32,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:43:32,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:43:34,420 INFO L124 PetriNetUnfolderBase]: 4282/6959 cut-off events. [2024-06-21 20:43:34,421 INFO L125 PetriNetUnfolderBase]: For 2433285/2433287 co-relation queries the response was YES. [2024-06-21 20:43:34,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91082 conditions, 6959 events. 4282/6959 cut-off events. For 2433285/2433287 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 45007 event pairs, 823 based on Foata normal form. 2/6959 useless extension candidates. Maximal degree in co-relation 90839. Up to 5878 conditions per place. [2024-06-21 20:43:34,590 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 587 selfloop transitions, 202 changer transitions 0/794 dead transitions. [2024-06-21 20:43:34,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 521 places, 794 transitions, 13113 flow [2024-06-21 20:43:34,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:43:34,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:43:34,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-21 20:43:34,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-21 20:43:34,591 INFO L175 Difference]: Start difference. First operand has 513 places, 773 transitions, 11021 flow. Second operand 9 states and 169 transitions. [2024-06-21 20:43:34,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 521 places, 794 transitions, 13113 flow [2024-06-21 20:43:44,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 517 places, 794 transitions, 12635 flow, removed 184 selfloop flow, removed 4 redundant places. [2024-06-21 20:43:44,725 INFO L231 Difference]: Finished difference. Result has 518 places, 773 transitions, 10953 flow [2024-06-21 20:43:44,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10543, PETRI_DIFFERENCE_MINUEND_PLACES=509, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=773, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=202, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=571, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10953, PETRI_PLACES=518, PETRI_TRANSITIONS=773} [2024-06-21 20:43:44,725 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 475 predicate places. [2024-06-21 20:43:44,726 INFO L495 AbstractCegarLoop]: Abstraction has has 518 places, 773 transitions, 10953 flow [2024-06-21 20:43:44,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:44,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:43:44,726 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:43:44,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-21 20:43:44,726 INFO L420 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:43:44,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:43:44,727 INFO L85 PathProgramCache]: Analyzing trace with hash 1287175717, now seen corresponding path program 11 times [2024-06-21 20:43:44,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:43:44,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992202790] [2024-06-21 20:43:44,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:43:44,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:43:44,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:43:46,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:43:46,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:43:46,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992202790] [2024-06-21 20:43:46,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992202790] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:43:46,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:43:46,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:43:46,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580286478] [2024-06-21 20:43:46,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:43:46,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:43:46,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:43:46,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:43:46,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:43:46,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:43:46,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 518 places, 773 transitions, 10953 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:46,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:43:46,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:43:46,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:43:48,427 INFO L124 PetriNetUnfolderBase]: 4287/6966 cut-off events. [2024-06-21 20:43:48,427 INFO L125 PetriNetUnfolderBase]: For 2420962/2420964 co-relation queries the response was YES. [2024-06-21 20:43:48,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90809 conditions, 6966 events. 4287/6966 cut-off events. For 2420962/2420964 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 45118 event pairs, 809 based on Foata normal form. 3/6967 useless extension candidates. Maximal degree in co-relation 90564. Up to 6239 conditions per place. [2024-06-21 20:43:48,588 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 649 selfloop transitions, 139 changer transitions 0/793 dead transitions. [2024-06-21 20:43:48,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 526 places, 793 transitions, 12742 flow [2024-06-21 20:43:48,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:43:48,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:43:48,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-21 20:43:48,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-21 20:43:48,589 INFO L175 Difference]: Start difference. First operand has 518 places, 773 transitions, 10953 flow. Second operand 9 states and 159 transitions. [2024-06-21 20:43:48,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 526 places, 793 transitions, 12742 flow [2024-06-21 20:43:58,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 518 places, 793 transitions, 12310 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-21 20:43:58,724 INFO L231 Difference]: Finished difference. Result has 519 places, 776 transitions, 10957 flow [2024-06-21 20:43:58,724 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10521, PETRI_DIFFERENCE_MINUEND_PLACES=510, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=773, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=634, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10957, PETRI_PLACES=519, PETRI_TRANSITIONS=776} [2024-06-21 20:43:58,724 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 476 predicate places. [2024-06-21 20:43:58,724 INFO L495 AbstractCegarLoop]: Abstraction has has 519 places, 776 transitions, 10957 flow [2024-06-21 20:43:58,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:58,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:43:58,725 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:43:58,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-21 20:43:58,725 INFO L420 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:43:58,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:43:58,729 INFO L85 PathProgramCache]: Analyzing trace with hash -1174438083, now seen corresponding path program 12 times [2024-06-21 20:43:58,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:43:58,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471365965] [2024-06-21 20:43:58,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:43:58,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:43:58,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:43:59,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:43:59,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:43:59,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471365965] [2024-06-21 20:43:59,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471365965] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:43:59,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:43:59,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:43:59,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773621375] [2024-06-21 20:43:59,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:43:59,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:43:59,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:43:59,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:43:59,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:43:59,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:43:59,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 519 places, 776 transitions, 10957 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:59,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:43:59,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:43:59,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:44:02,277 INFO L124 PetriNetUnfolderBase]: 4292/6973 cut-off events. [2024-06-21 20:44:02,277 INFO L125 PetriNetUnfolderBase]: For 2448935/2448937 co-relation queries the response was YES. [2024-06-21 20:44:02,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90897 conditions, 6973 events. 4292/6973 cut-off events. For 2448935/2448937 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 45124 event pairs, 808 based on Foata normal form. 3/6974 useless extension candidates. Maximal degree in co-relation 90651. Up to 6234 conditions per place. [2024-06-21 20:44:02,415 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 641 selfloop transitions, 150 changer transitions 0/796 dead transitions. [2024-06-21 20:44:02,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 527 places, 796 transitions, 12758 flow [2024-06-21 20:44:02,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:44:02,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:44:02,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-21 20:44:02,425 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-06-21 20:44:02,425 INFO L175 Difference]: Start difference. First operand has 519 places, 776 transitions, 10957 flow. Second operand 9 states and 160 transitions. [2024-06-21 20:44:02,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 527 places, 796 transitions, 12758 flow [2024-06-21 20:44:14,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 520 places, 796 transitions, 12350 flow, removed 67 selfloop flow, removed 7 redundant places. [2024-06-21 20:44:14,420 INFO L231 Difference]: Finished difference. Result has 521 places, 779 transitions, 11013 flow [2024-06-21 20:44:14,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10549, PETRI_DIFFERENCE_MINUEND_PLACES=512, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=776, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=626, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11013, PETRI_PLACES=521, PETRI_TRANSITIONS=779} [2024-06-21 20:44:14,421 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 478 predicate places. [2024-06-21 20:44:14,421 INFO L495 AbstractCegarLoop]: Abstraction has has 521 places, 779 transitions, 11013 flow [2024-06-21 20:44:14,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:14,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:44:14,421 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:44:14,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-21 20:44:14,422 INFO L420 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:44:14,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:44:14,422 INFO L85 PathProgramCache]: Analyzing trace with hash -1174437649, now seen corresponding path program 4 times [2024-06-21 20:44:14,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:44:14,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278063292] [2024-06-21 20:44:14,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:44:14,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:44:14,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:44:15,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:44:15,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:44:15,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278063292] [2024-06-21 20:44:15,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278063292] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:44:15,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:44:15,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:44:15,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591833331] [2024-06-21 20:44:15,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:44:15,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:44:15,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:44:15,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:44:15,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:44:15,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:44:15,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 521 places, 779 transitions, 11013 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:15,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:44:15,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:44:15,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:44:17,853 INFO L124 PetriNetUnfolderBase]: 4297/6984 cut-off events. [2024-06-21 20:44:17,853 INFO L125 PetriNetUnfolderBase]: For 2475079/2475083 co-relation queries the response was YES. [2024-06-21 20:44:18,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91097 conditions, 6984 events. 4297/6984 cut-off events. For 2475079/2475083 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 45275 event pairs, 824 based on Foata normal form. 5/6987 useless extension candidates. Maximal degree in co-relation 90850. Up to 6447 conditions per place. [2024-06-21 20:44:18,256 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 735 selfloop transitions, 59 changer transitions 0/799 dead transitions. [2024-06-21 20:44:18,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 529 places, 799 transitions, 12784 flow [2024-06-21 20:44:18,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:44:18,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:44:18,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-21 20:44:18,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-06-21 20:44:18,257 INFO L175 Difference]: Start difference. First operand has 521 places, 779 transitions, 11013 flow. Second operand 9 states and 156 transitions. [2024-06-21 20:44:18,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 529 places, 799 transitions, 12784 flow [2024-06-21 20:44:28,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 522 places, 799 transitions, 12348 flow, removed 70 selfloop flow, removed 7 redundant places. [2024-06-21 20:44:28,103 INFO L231 Difference]: Finished difference. Result has 523 places, 782 transitions, 10823 flow [2024-06-21 20:44:28,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10577, PETRI_DIFFERENCE_MINUEND_PLACES=514, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=779, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=720, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10823, PETRI_PLACES=523, PETRI_TRANSITIONS=782} [2024-06-21 20:44:28,104 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 480 predicate places. [2024-06-21 20:44:28,104 INFO L495 AbstractCegarLoop]: Abstraction has has 523 places, 782 transitions, 10823 flow [2024-06-21 20:44:28,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:28,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:44:28,104 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:44:28,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-06-21 20:44:28,105 INFO L420 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:44:28,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:44:28,105 INFO L85 PathProgramCache]: Analyzing trace with hash -1174437897, now seen corresponding path program 6 times [2024-06-21 20:44:28,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:44:28,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864705473] [2024-06-21 20:44:28,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:44:28,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:44:28,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:44:29,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:44:29,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:44:29,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864705473] [2024-06-21 20:44:29,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864705473] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:44:29,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:44:29,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:44:29,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804552456] [2024-06-21 20:44:29,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:44:29,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:44:29,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:44:29,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:44:29,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:44:29,417 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 20:44:29,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 523 places, 782 transitions, 10823 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:29,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:44:29,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 20:44:29,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:44:32,231 INFO L124 PetriNetUnfolderBase]: 4302/6993 cut-off events. [2024-06-21 20:44:32,232 INFO L125 PetriNetUnfolderBase]: For 2484371/2484375 co-relation queries the response was YES. [2024-06-21 20:44:32,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91049 conditions, 6993 events. 4302/6993 cut-off events. For 2484371/2484375 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 45228 event pairs, 834 based on Foata normal form. 3/6994 useless extension candidates. Maximal degree in co-relation 90801. Up to 6320 conditions per place. [2024-06-21 20:44:32,479 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 686 selfloop transitions, 112 changer transitions 0/803 dead transitions. [2024-06-21 20:44:32,479 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 531 places, 803 transitions, 12648 flow [2024-06-21 20:44:32,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:44:32,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:44:32,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-21 20:44:32,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-21 20:44:32,481 INFO L175 Difference]: Start difference. First operand has 523 places, 782 transitions, 10823 flow. Second operand 9 states and 164 transitions. [2024-06-21 20:44:32,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 531 places, 803 transitions, 12648 flow [2024-06-21 20:44:41,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 524 places, 803 transitions, 12436 flow, removed 49 selfloop flow, removed 7 redundant places. [2024-06-21 20:44:41,272 INFO L231 Difference]: Finished difference. Result has 525 places, 785 transitions, 10952 flow [2024-06-21 20:44:41,272 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10611, PETRI_DIFFERENCE_MINUEND_PLACES=516, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=782, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=670, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10952, PETRI_PLACES=525, PETRI_TRANSITIONS=785} [2024-06-21 20:44:41,272 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 482 predicate places. [2024-06-21 20:44:41,273 INFO L495 AbstractCegarLoop]: Abstraction has has 525 places, 785 transitions, 10952 flow [2024-06-21 20:44:41,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:41,273 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:44:41,273 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:44:41,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2024-06-21 20:44:41,273 INFO L420 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:44:41,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:44:41,273 INFO L85 PathProgramCache]: Analyzing trace with hash 1631333799, now seen corresponding path program 1 times [2024-06-21 20:44:41,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:44:41,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584483130] [2024-06-21 20:44:41,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:44:41,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:44:41,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:44:42,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:44:42,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:44:42,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584483130] [2024-06-21 20:44:42,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584483130] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:44:42,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:44:42,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:44:42,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979038735] [2024-06-21 20:44:42,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:44:42,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:44:42,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:44:42,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:44:42,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:44:42,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 20:44:42,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 525 places, 785 transitions, 10952 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:42,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:44:42,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 20:44:42,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:44:44,999 INFO L124 PetriNetUnfolderBase]: 4174/6829 cut-off events. [2024-06-21 20:44:44,999 INFO L125 PetriNetUnfolderBase]: For 2532122/2532135 co-relation queries the response was YES. [2024-06-21 20:44:45,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90181 conditions, 6829 events. 4174/6829 cut-off events. For 2532122/2532135 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 44571 event pairs, 608 based on Foata normal form. 15/6821 useless extension candidates. Maximal degree in co-relation 89932. Up to 5823 conditions per place. [2024-06-21 20:44:45,288 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 649 selfloop transitions, 77 changer transitions 0/814 dead transitions. [2024-06-21 20:44:45,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 533 places, 814 transitions, 12588 flow [2024-06-21 20:44:45,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:44:45,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:44:45,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-21 20:44:45,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4497354497354497 [2024-06-21 20:44:45,289 INFO L175 Difference]: Start difference. First operand has 525 places, 785 transitions, 10952 flow. Second operand 9 states and 170 transitions. [2024-06-21 20:44:45,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 533 places, 814 transitions, 12588 flow [2024-06-21 20:44:57,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 526 places, 814 transitions, 12278 flow, removed 45 selfloop flow, removed 7 redundant places. [2024-06-21 20:44:57,015 INFO L231 Difference]: Finished difference. Result has 527 places, 787 transitions, 10890 flow [2024-06-21 20:44:57,016 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10642, PETRI_DIFFERENCE_MINUEND_PLACES=518, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=785, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=708, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10890, PETRI_PLACES=527, PETRI_TRANSITIONS=787} [2024-06-21 20:44:57,016 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 484 predicate places. [2024-06-21 20:44:57,016 INFO L495 AbstractCegarLoop]: Abstraction has has 527 places, 787 transitions, 10890 flow [2024-06-21 20:44:57,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:57,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:44:57,016 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:44:57,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2024-06-21 20:44:57,017 INFO L420 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:44:57,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:44:57,017 INFO L85 PathProgramCache]: Analyzing trace with hash 1926909189, now seen corresponding path program 2 times [2024-06-21 20:44:57,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:44:57,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018934168] [2024-06-21 20:44:57,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:44:57,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:44:57,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:44:58,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:44:58,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:44:58,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018934168] [2024-06-21 20:44:58,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018934168] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:44:58,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:44:58,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:44:58,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069878497] [2024-06-21 20:44:58,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:44:58,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:44:58,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:44:58,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:44:58,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:44:58,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 20:44:58,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 527 places, 787 transitions, 10890 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:58,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:44:58,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 20:44:58,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:45:00,889 INFO L124 PetriNetUnfolderBase]: 4182/6847 cut-off events. [2024-06-21 20:45:00,889 INFO L125 PetriNetUnfolderBase]: For 2558529/2558542 co-relation queries the response was YES. [2024-06-21 20:45:00,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90583 conditions, 6847 events. 4182/6847 cut-off events. For 2558529/2558542 co-relation queries the response was YES. Maximal size of possible extension queue 488. Compared 44850 event pairs, 775 based on Foata normal form. 15/6824 useless extension candidates. Maximal degree in co-relation 90333. Up to 6072 conditions per place. [2024-06-21 20:45:01,023 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 674 selfloop transitions, 49 changer transitions 0/811 dead transitions. [2024-06-21 20:45:01,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 535 places, 811 transitions, 12502 flow [2024-06-21 20:45:01,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:45:01,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:45:01,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-21 20:45:01,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4417989417989418 [2024-06-21 20:45:01,024 INFO L175 Difference]: Start difference. First operand has 527 places, 787 transitions, 10890 flow. Second operand 9 states and 167 transitions. [2024-06-21 20:45:01,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 535 places, 811 transitions, 12502 flow Killed by 15