./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix024_power.opt_pso.opt_rmo.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/mix024_power.opt_pso.opt_rmo.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix024_power.opt_pso.opt_rmo.opt.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/mix024_power.opt_pso.opt_rmo.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-7724a2d-m [2024-06-28 03:11:35,461 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-28 03:11:35,522 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-28 03:11:35,526 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-28 03:11:35,526 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-28 03:11:35,549 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-28 03:11:35,550 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-28 03:11:35,550 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-28 03:11:35,550 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-28 03:11:35,553 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-28 03:11:35,554 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-28 03:11:35,554 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-28 03:11:35,555 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-28 03:11:35,556 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-28 03:11:35,556 INFO L153 SettingsManager]: * Use SBE=true [2024-06-28 03:11:35,556 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-28 03:11:35,557 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-28 03:11:35,557 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-28 03:11:35,557 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-28 03:11:35,557 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-28 03:11:35,557 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-28 03:11:35,558 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-28 03:11:35,558 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-28 03:11:35,558 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-28 03:11:35,558 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-28 03:11:35,559 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-28 03:11:35,559 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-28 03:11:35,559 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-28 03:11:35,559 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-28 03:11:35,560 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-28 03:11:35,561 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-28 03:11:35,561 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-28 03:11:35,561 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 03:11:35,561 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-28 03:11:35,561 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-28 03:11:35,561 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-28 03:11:35,562 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-28 03:11:35,562 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-28 03:11:35,562 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-28 03:11:35,562 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-28 03:11:35,562 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-28 03:11:35,563 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-28 03:11:35,563 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-28 03:11:35,563 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-28 03:11:35,768 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-28 03:11:35,798 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-28 03:11:35,802 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-28 03:11:35,803 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-28 03:11:35,803 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-28 03:11:35,805 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/mix024_power.opt_pso.opt_rmo.opt.yml/witness.yml [2024-06-28 03:11:35,974 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-28 03:11:35,974 INFO L274 PluginConnector]: CDTParser initialized [2024-06-28 03:11:35,974 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix024_power.opt_pso.opt_rmo.opt.i [2024-06-28 03:11:36,996 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-28 03:11:37,312 INFO L384 CDTParser]: Found 1 translation units. [2024-06-28 03:11:37,313 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix024_power.opt_pso.opt_rmo.opt.i [2024-06-28 03:11:37,327 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b1c16005/b99b540079f440958411b5e952eeb064/FLAGbc07d7138 [2024-06-28 03:11:37,340 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b1c16005/b99b540079f440958411b5e952eeb064 [2024-06-28 03:11:37,340 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-28 03:11:37,341 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-28 03:11:37,344 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-28 03:11:37,344 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-28 03:11:37,347 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-28 03:11:37,348 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 03:11:35" (1/2) ... [2024-06-28 03:11:37,349 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13764572 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:11:37, skipping insertion in model container [2024-06-28 03:11:37,349 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 03:11:35" (1/2) ... [2024-06-28 03:11:37,350 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6e5c97bd and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:11:37, skipping insertion in model container [2024-06-28 03:11:37,350 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 03:11:37" (2/2) ... [2024-06-28 03:11:37,350 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13764572 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:11:37, skipping insertion in model container [2024-06-28 03:11:37,351 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 03:11:37" (2/2) ... [2024-06-28 03:11:37,351 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-28 03:11:37,428 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-28 03:11:37,430 INFO L97 edCorrectnessWitness]: Location invariant before [L849-L849] ((((((((((((((((((((! multithreaded || (y == 0 || y == 1)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 1))) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || ((((((((((((((((((((0 <= __unbuffered_cnt && y$flush_delayed == (_Bool)0) && y$r_buff0_thd0 == (_Bool)0) && y$r_buff0_thd1 == (_Bool)0) && y$r_buff0_thd3 == (_Bool)0) && y$r_buff1_thd0 == (_Bool)0) && y$r_buff1_thd1 == (_Bool)0) && y$r_buff1_thd3 == (_Bool)0) && y$read_delayed == (_Bool)0) && y$read_delayed_var == 0) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (a == 0 || a == 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)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || (y$mem_tmp == 0 || y$mem_tmp == 1))) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || ((z == 0 || z == 1) || z == 2))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0) [2024-06-28 03:11:37,430 INFO L97 edCorrectnessWitness]: Location invariant before [L850-L850] ((((((((((((((((((((! multithreaded || (y == 0 || y == 1)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 1))) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 1))) && (! multithreaded || (a == 0 || a == 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_thd3 == (_Bool)0) && y$r_buff1_thd0 == (_Bool)0) && y$r_buff1_thd1 == (_Bool)0) && y$r_buff1_thd3 == (_Bool)0) && y$read_delayed == (_Bool)0) && y$read_delayed_var == 0) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (a == 0 || a == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1)) && (y$mem_tmp == 0 || y$mem_tmp == 1)) && (y$w_buff0 == 0 || y$w_buff0 == 1)) && (y$w_buff1 == 0 || y$w_buff1 == 1)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || (y$mem_tmp == 0 || y$mem_tmp == 1))) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || ((z == 0 || z == 1) || z == 2))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0) [2024-06-28 03:11:37,430 INFO L97 edCorrectnessWitness]: Location invariant before [L847-L847] ((((((((((((((((((((! multithreaded || (y == 0 || y == 1)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 1))) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || ((((((((((((((((((((0 <= __unbuffered_cnt && y$flush_delayed == (_Bool)0) && y$r_buff0_thd0 == (_Bool)0) && y$r_buff0_thd1 == (_Bool)0) && y$r_buff0_thd3 == (_Bool)0) && y$r_buff1_thd0 == (_Bool)0) && y$r_buff1_thd1 == (_Bool)0) && y$r_buff1_thd3 == (_Bool)0) && y$read_delayed == (_Bool)0) && y$read_delayed_var == 0) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (a == 0 || a == 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)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || (y$mem_tmp == 0 || y$mem_tmp == 1))) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || ((z == 0 || z == 1) || z == 2))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0) [2024-06-28 03:11:37,430 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-28 03:11:37,430 INFO L106 edCorrectnessWitness]: ghost_update [L845-L845] multithreaded = 1; [2024-06-28 03:11:37,473 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-28 03:11:37,876 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 03:11:37,886 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-28 03:11:38,023 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 03:11:38,065 INFO L206 MainTranslator]: Completed translation [2024-06-28 03:11:38,066 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:11:38 WrapperNode [2024-06-28 03:11:38,066 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-28 03:11:38,067 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-28 03:11:38,068 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-28 03:11:38,068 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-28 03:11:38,073 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:11:38" (1/1) ... [2024-06-28 03:11:38,095 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:11:38" (1/1) ... [2024-06-28 03:11:38,134 INFO L138 Inliner]: procedures = 175, calls = 49, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 128 [2024-06-28 03:11:38,134 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-28 03:11:38,136 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-28 03:11:38,137 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-28 03:11:38,137 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-28 03:11:38,145 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:11:38" (1/1) ... [2024-06-28 03:11:38,145 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:11:38" (1/1) ... [2024-06-28 03:11:38,148 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:11:38" (1/1) ... [2024-06-28 03:11:38,173 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-28 03:11:38,173 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:11:38" (1/1) ... [2024-06-28 03:11:38,174 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:11:38" (1/1) ... [2024-06-28 03:11:38,183 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:11:38" (1/1) ... [2024-06-28 03:11:38,185 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:11:38" (1/1) ... [2024-06-28 03:11:38,187 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:11:38" (1/1) ... [2024-06-28 03:11:38,188 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:11:38" (1/1) ... [2024-06-28 03:11:38,191 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-28 03:11:38,191 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-28 03:11:38,191 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-28 03:11:38,191 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-28 03:11:38,192 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:11:38" (1/1) ... [2024-06-28 03:11:38,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 03:11:38,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 03:11:38,254 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-28 03:11:38,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-28 03:11:38,288 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-28 03:11:38,288 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-28 03:11:38,288 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-28 03:11:38,289 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-28 03:11:38,289 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-28 03:11:38,289 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-28 03:11:38,289 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-28 03:11:38,289 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-28 03:11:38,290 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-28 03:11:38,290 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-28 03:11:38,290 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-28 03:11:38,290 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-28 03:11:38,291 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-28 03:11:38,395 INFO L244 CfgBuilder]: Building ICFG [2024-06-28 03:11:38,397 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-28 03:11:38,806 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-28 03:11:38,806 INFO L293 CfgBuilder]: Performing block encoding [2024-06-28 03:11:38,947 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-28 03:11:38,948 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-28 03:11:38,949 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 03:11:38 BoogieIcfgContainer [2024-06-28 03:11:38,949 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-28 03:11:38,952 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-28 03:11:38,952 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-28 03:11:38,955 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-28 03:11:38,955 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 03:11:35" (1/4) ... [2024-06-28 03:11:38,955 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4022962 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 28.06 03:11:38, skipping insertion in model container [2024-06-28 03:11:38,956 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.06 03:11:37" (2/4) ... [2024-06-28 03:11:38,956 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4022962 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.06 03:11:38, skipping insertion in model container [2024-06-28 03:11:38,956 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:11:38" (3/4) ... [2024-06-28 03:11:38,956 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4022962 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.06 03:11:38, skipping insertion in model container [2024-06-28 03:11:38,956 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 03:11:38" (4/4) ... [2024-06-28 03:11:38,957 INFO L112 eAbstractionObserver]: Analyzing ICFG mix024_power.opt_pso.opt_rmo.opt.i [2024-06-28 03:11:38,970 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-28 03:11:38,970 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-28 03:11:38,971 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-28 03:11:39,016 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-28 03:11:39,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 53 places, 43 transitions, 98 flow [2024-06-28 03:11:39,070 INFO L124 PetriNetUnfolderBase]: 0/40 cut-off events. [2024-06-28 03:11:39,070 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 03:11:39,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50 conditions, 40 events. 0/40 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 77 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-28 03:11:39,073 INFO L82 GeneralOperation]: Start removeDead. Operand has 53 places, 43 transitions, 98 flow [2024-06-28 03:11:39,075 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 34 transitions, 77 flow [2024-06-28 03:11:39,082 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-28 03:11:39,086 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;@19a944a0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-28 03:11:39,087 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-28 03:11:39,090 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-28 03:11:39,090 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-28 03:11:39,090 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 03:11:39,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:11:39,091 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-28 03:11:39,091 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:11:39,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:11:39,095 INFO L85 PathProgramCache]: Analyzing trace with hash 372387487, now seen corresponding path program 1 times [2024-06-28 03:11:39,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:11:39,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703134845] [2024-06-28 03:11:39,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:11:39,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:11:39,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:11:39,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:11:39,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:11:39,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703134845] [2024-06-28 03:11:40,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703134845] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:11:40,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:11:40,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-28 03:11:40,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076173114] [2024-06-28 03:11:40,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:11:40,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-28 03:11:40,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:11:40,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-28 03:11:40,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-28 03:11:40,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 43 [2024-06-28 03:11:40,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 34 transitions, 77 flow. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:11:40,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:11:40,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 43 [2024-06-28 03:11:40,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:11:40,386 INFO L124 PetriNetUnfolderBase]: 1407/2253 cut-off events. [2024-06-28 03:11:40,386 INFO L125 PetriNetUnfolderBase]: For 41/41 co-relation queries the response was YES. [2024-06-28 03:11:40,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4457 conditions, 2253 events. 1407/2253 cut-off events. For 41/41 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 11626 event pairs, 989 based on Foata normal form. 1/2168 useless extension candidates. Maximal degree in co-relation 4445. Up to 2105 conditions per place. [2024-06-28 03:11:40,403 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 32 selfloop transitions, 4 changer transitions 0/44 dead transitions. [2024-06-28 03:11:40,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 44 transitions, 175 flow [2024-06-28 03:11:40,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-28 03:11:40,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-28 03:11:40,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 81 transitions. [2024-06-28 03:11:40,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.627906976744186 [2024-06-28 03:11:40,414 INFO L175 Difference]: Start difference. First operand has 44 places, 34 transitions, 77 flow. Second operand 3 states and 81 transitions. [2024-06-28 03:11:40,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 44 transitions, 175 flow [2024-06-28 03:11:40,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 44 transitions, 170 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-28 03:11:40,419 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 104 flow [2024-06-28 03:11:40,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=44, PETRI_TRANSITIONS=37} [2024-06-28 03:11:40,425 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 0 predicate places. [2024-06-28 03:11:40,425 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 104 flow [2024-06-28 03:11:40,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:11:40,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:11:40,426 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:11:40,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-28 03:11:40,427 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:11:40,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:11:40,429 INFO L85 PathProgramCache]: Analyzing trace with hash 1382137662, now seen corresponding path program 1 times [2024-06-28 03:11:40,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:11:40,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084168425] [2024-06-28 03:11:40,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:11:40,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:11:40,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:11:40,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:11:40,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:11:40,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084168425] [2024-06-28 03:11:40,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084168425] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:11:40,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:11:40,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-28 03:11:40,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556366786] [2024-06-28 03:11:40,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:11:40,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-28 03:11:40,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:11:40,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-28 03:11:40,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-28 03:11:40,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2024-06-28 03:11:40,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 104 flow. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:11:40,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:11:40,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2024-06-28 03:11:40,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:11:41,250 INFO L124 PetriNetUnfolderBase]: 1653/2544 cut-off events. [2024-06-28 03:11:41,250 INFO L125 PetriNetUnfolderBase]: For 463/463 co-relation queries the response was YES. [2024-06-28 03:11:41,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5733 conditions, 2544 events. 1653/2544 cut-off events. For 463/463 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 12794 event pairs, 1038 based on Foata normal form. 3/2544 useless extension candidates. Maximal degree in co-relation 5721. Up to 2441 conditions per place. [2024-06-28 03:11:41,264 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 40 selfloop transitions, 7 changer transitions 0/54 dead transitions. [2024-06-28 03:11:41,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 54 transitions, 244 flow [2024-06-28 03:11:41,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 03:11:41,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 03:11:41,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 102 transitions. [2024-06-28 03:11:41,267 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5930232558139535 [2024-06-28 03:11:41,268 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 104 flow. Second operand 4 states and 102 transitions. [2024-06-28 03:11:41,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 54 transitions, 244 flow [2024-06-28 03:11:41,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 54 transitions, 240 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-28 03:11:41,274 INFO L231 Difference]: Finished difference. Result has 47 places, 40 transitions, 140 flow [2024-06-28 03:11:41,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=140, PETRI_PLACES=47, PETRI_TRANSITIONS=40} [2024-06-28 03:11:41,275 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2024-06-28 03:11:41,275 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 40 transitions, 140 flow [2024-06-28 03:11:41,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:11:41,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:11:41,276 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:11:41,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-28 03:11:41,278 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:11:41,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:11:41,281 INFO L85 PathProgramCache]: Analyzing trace with hash -103403870, now seen corresponding path program 1 times [2024-06-28 03:11:41,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:11:41,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756273029] [2024-06-28 03:11:41,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:11:41,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:11:41,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:11:41,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:11:41,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:11:41,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756273029] [2024-06-28 03:11:41,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756273029] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:11:41,877 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:11:41,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 03:11:41,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090928109] [2024-06-28 03:11:41,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:11:41,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 03:11:41,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:11:41,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 03:11:41,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-28 03:11:41,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-28 03:11:41,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 40 transitions, 140 flow. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:11:41,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:11:41,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-28 03:11:41,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:11:42,338 INFO L124 PetriNetUnfolderBase]: 1947/2973 cut-off events. [2024-06-28 03:11:42,338 INFO L125 PetriNetUnfolderBase]: For 1495/1495 co-relation queries the response was YES. [2024-06-28 03:11:42,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7386 conditions, 2973 events. 1947/2973 cut-off events. For 1495/1495 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 14718 event pairs, 1135 based on Foata normal form. 3/2973 useless extension candidates. Maximal degree in co-relation 7372. Up to 2853 conditions per place. [2024-06-28 03:11:42,354 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 48 selfloop transitions, 10 changer transitions 0/64 dead transitions. [2024-06-28 03:11:42,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 64 transitions, 324 flow [2024-06-28 03:11:42,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 03:11:42,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 03:11:42,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 121 transitions. [2024-06-28 03:11:42,356 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5627906976744186 [2024-06-28 03:11:42,356 INFO L175 Difference]: Start difference. First operand has 47 places, 40 transitions, 140 flow. Second operand 5 states and 121 transitions. [2024-06-28 03:11:42,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 64 transitions, 324 flow [2024-06-28 03:11:42,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 64 transitions, 310 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-28 03:11:42,359 INFO L231 Difference]: Finished difference. Result has 50 places, 43 transitions, 176 flow [2024-06-28 03:11:42,359 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=176, PETRI_PLACES=50, PETRI_TRANSITIONS=43} [2024-06-28 03:11:42,359 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 6 predicate places. [2024-06-28 03:11:42,360 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 176 flow [2024-06-28 03:11:42,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:11:42,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:11:42,360 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:11:42,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-28 03:11:42,361 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:11:42,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:11:42,361 INFO L85 PathProgramCache]: Analyzing trace with hash 2086851605, now seen corresponding path program 1 times [2024-06-28 03:11:42,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:11:42,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745560773] [2024-06-28 03:11:42,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:11:42,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:11:42,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:11:42,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:11:42,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:11:42,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745560773] [2024-06-28 03:11:42,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745560773] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:11:42,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:11:42,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 03:11:42,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236960026] [2024-06-28 03:11:42,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:11:42,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 03:11:42,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:11:42,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 03:11:42,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 03:11:43,045 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-28 03:11:43,045 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 176 flow. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:11:43,046 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:11:43,046 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-28 03:11:43,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:11:43,410 INFO L124 PetriNetUnfolderBase]: 1935/2939 cut-off events. [2024-06-28 03:11:43,410 INFO L125 PetriNetUnfolderBase]: For 2815/2815 co-relation queries the response was YES. [2024-06-28 03:11:43,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7997 conditions, 2939 events. 1935/2939 cut-off events. For 2815/2815 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 14456 event pairs, 843 based on Foata normal form. 6/2943 useless extension candidates. Maximal degree in co-relation 7982. Up to 2805 conditions per place. [2024-06-28 03:11:43,424 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 56 selfloop transitions, 13 changer transitions 0/75 dead transitions. [2024-06-28 03:11:43,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 75 transitions, 406 flow [2024-06-28 03:11:43,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 03:11:43,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 03:11:43,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-28 03:11:43,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5581395348837209 [2024-06-28 03:11:43,426 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 176 flow. Second operand 6 states and 144 transitions. [2024-06-28 03:11:43,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 75 transitions, 406 flow [2024-06-28 03:11:43,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 75 transitions, 382 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-28 03:11:43,429 INFO L231 Difference]: Finished difference. Result has 53 places, 46 transitions, 212 flow [2024-06-28 03:11:43,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=212, PETRI_PLACES=53, PETRI_TRANSITIONS=46} [2024-06-28 03:11:43,430 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 9 predicate places. [2024-06-28 03:11:43,430 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 46 transitions, 212 flow [2024-06-28 03:11:43,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:11:43,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:11:43,431 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:11:43,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-28 03:11:43,431 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:11:43,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:11:43,431 INFO L85 PathProgramCache]: Analyzing trace with hash -1624971842, now seen corresponding path program 1 times [2024-06-28 03:11:43,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:11:43,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914757228] [2024-06-28 03:11:43,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:11:43,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:11:43,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:11:44,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:11:44,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:11:44,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914757228] [2024-06-28 03:11:44,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914757228] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:11:44,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:11:44,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 03:11:44,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569675987] [2024-06-28 03:11:44,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:11:44,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 03:11:44,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:11:44,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 03:11:44,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-28 03:11:44,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-28 03:11:44,143 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 46 transitions, 212 flow. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:11:44,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:11:44,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-28 03:11:44,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:11:44,491 INFO L124 PetriNetUnfolderBase]: 1556/2546 cut-off events. [2024-06-28 03:11:44,491 INFO L125 PetriNetUnfolderBase]: For 3635/3635 co-relation queries the response was YES. [2024-06-28 03:11:44,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7321 conditions, 2546 events. 1556/2546 cut-off events. For 3635/3635 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 13485 event pairs, 785 based on Foata normal form. 2/2504 useless extension candidates. Maximal degree in co-relation 7304. Up to 2304 conditions per place. [2024-06-28 03:11:44,505 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 44 selfloop transitions, 8 changer transitions 0/60 dead transitions. [2024-06-28 03:11:44,505 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 60 transitions, 360 flow [2024-06-28 03:11:44,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 03:11:44,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 03:11:44,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 106 transitions. [2024-06-28 03:11:44,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4930232558139535 [2024-06-28 03:11:44,506 INFO L175 Difference]: Start difference. First operand has 53 places, 46 transitions, 212 flow. Second operand 5 states and 106 transitions. [2024-06-28 03:11:44,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 60 transitions, 360 flow [2024-06-28 03:11:44,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 60 transitions, 326 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-28 03:11:44,509 INFO L231 Difference]: Finished difference. Result has 54 places, 49 transitions, 224 flow [2024-06-28 03:11:44,509 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=224, PETRI_PLACES=54, PETRI_TRANSITIONS=49} [2024-06-28 03:11:44,510 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 10 predicate places. [2024-06-28 03:11:44,510 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 49 transitions, 224 flow [2024-06-28 03:11:44,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:11:44,510 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:11:44,511 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:11:44,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-28 03:11:44,511 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:11:44,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:11:44,511 INFO L85 PathProgramCache]: Analyzing trace with hash 1165481396, now seen corresponding path program 1 times [2024-06-28 03:11:44,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:11:44,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872974082] [2024-06-28 03:11:44,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:11:44,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:11:44,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:11:45,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:11:45,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:11:45,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872974082] [2024-06-28 03:11:45,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872974082] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:11:45,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:11:45,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 03:11:45,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443253876] [2024-06-28 03:11:45,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:11:45,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 03:11:45,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:11:45,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 03:11:45,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 03:11:45,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-28 03:11:45,419 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 49 transitions, 224 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) [2024-06-28 03:11:45,419 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:11:45,419 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-28 03:11:45,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:11:45,816 INFO L124 PetriNetUnfolderBase]: 1842/2876 cut-off events. [2024-06-28 03:11:45,817 INFO L125 PetriNetUnfolderBase]: For 5868/5868 co-relation queries the response was YES. [2024-06-28 03:11:45,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8952 conditions, 2876 events. 1842/2876 cut-off events. For 5868/5868 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 14515 event pairs, 927 based on Foata normal form. 3/2877 useless extension candidates. Maximal degree in co-relation 8933. Up to 2684 conditions per place. [2024-06-28 03:11:45,841 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 52 selfloop transitions, 19 changer transitions 0/78 dead transitions. [2024-06-28 03:11:45,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 78 transitions, 490 flow [2024-06-28 03:11:45,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:11:45,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:11:45,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-28 03:11:45,843 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4584717607973422 [2024-06-28 03:11:45,843 INFO L175 Difference]: Start difference. First operand has 54 places, 49 transitions, 224 flow. Second operand 7 states and 138 transitions. [2024-06-28 03:11:45,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 78 transitions, 490 flow [2024-06-28 03:11:45,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 78 transitions, 466 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-28 03:11:45,847 INFO L231 Difference]: Finished difference. Result has 61 places, 62 transitions, 344 flow [2024-06-28 03:11:45,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=344, PETRI_PLACES=61, PETRI_TRANSITIONS=62} [2024-06-28 03:11:45,849 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 17 predicate places. [2024-06-28 03:11:45,850 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 62 transitions, 344 flow [2024-06-28 03:11:45,850 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) [2024-06-28 03:11:45,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:11:45,850 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:11:45,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-28 03:11:45,850 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:11:45,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:11:45,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1005910407, now seen corresponding path program 1 times [2024-06-28 03:11:45,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:11:45,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521514237] [2024-06-28 03:11:45,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:11:45,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:11:45,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:11:46,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:11:46,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:11:46,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521514237] [2024-06-28 03:11:46,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521514237] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:11:46,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:11:46,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 03:11:46,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136840677] [2024-06-28 03:11:46,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:11:46,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 03:11:46,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:11:46,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 03:11:46,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 03:11:46,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-28 03:11:46,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 62 transitions, 344 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) [2024-06-28 03:11:46,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:11:46,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-28 03:11:46,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:11:46,926 INFO L124 PetriNetUnfolderBase]: 1902/2982 cut-off events. [2024-06-28 03:11:46,926 INFO L125 PetriNetUnfolderBase]: For 9317/9327 co-relation queries the response was YES. [2024-06-28 03:11:46,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10401 conditions, 2982 events. 1902/2982 cut-off events. For 9317/9327 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 15149 event pairs, 932 based on Foata normal form. 2/2971 useless extension candidates. Maximal degree in co-relation 10378. Up to 2774 conditions per place. [2024-06-28 03:11:46,941 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 60 selfloop transitions, 12 changer transitions 0/82 dead transitions. [2024-06-28 03:11:46,942 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 82 transitions, 558 flow [2024-06-28 03:11:46,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 03:11:46,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 03:11:46,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 123 transitions. [2024-06-28 03:11:46,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47674418604651164 [2024-06-28 03:11:46,943 INFO L175 Difference]: Start difference. First operand has 61 places, 62 transitions, 344 flow. Second operand 6 states and 123 transitions. [2024-06-28 03:11:46,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 82 transitions, 558 flow [2024-06-28 03:11:46,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 82 transitions, 542 flow, removed 7 selfloop flow, removed 1 redundant places. [2024-06-28 03:11:46,950 INFO L231 Difference]: Finished difference. Result has 66 places, 65 transitions, 390 flow [2024-06-28 03:11:46,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=328, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=390, PETRI_PLACES=66, PETRI_TRANSITIONS=65} [2024-06-28 03:11:46,951 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 22 predicate places. [2024-06-28 03:11:46,951 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 65 transitions, 390 flow [2024-06-28 03:11:46,951 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) [2024-06-28 03:11:46,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:11:46,951 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:11:46,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-28 03:11:46,952 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:11:46,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:11:46,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1770175965, now seen corresponding path program 2 times [2024-06-28 03:11:46,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:11:46,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337204799] [2024-06-28 03:11:46,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:11:46,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:11:46,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:11:47,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:11:47,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:11:47,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337204799] [2024-06-28 03:11:47,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337204799] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:11:47,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:11:47,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 03:11:47,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538885790] [2024-06-28 03:11:47,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:11:47,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 03:11:47,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:11:47,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 03:11:47,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 03:11:47,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-28 03:11:47,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 65 transitions, 390 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) [2024-06-28 03:11:47,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:11:47,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-28 03:11:47,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:11:48,199 INFO L124 PetriNetUnfolderBase]: 1897/2977 cut-off events. [2024-06-28 03:11:48,200 INFO L125 PetriNetUnfolderBase]: For 11992/12014 co-relation queries the response was YES. [2024-06-28 03:11:48,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11050 conditions, 2977 events. 1897/2977 cut-off events. For 11992/12014 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 15132 event pairs, 938 based on Foata normal form. 10/2973 useless extension candidates. Maximal degree in co-relation 11024. Up to 2749 conditions per place. [2024-06-28 03:11:48,213 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 57 selfloop transitions, 16 changer transitions 0/83 dead transitions. [2024-06-28 03:11:48,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 83 transitions, 606 flow [2024-06-28 03:11:48,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 03:11:48,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 03:11:48,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 122 transitions. [2024-06-28 03:11:48,215 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4728682170542636 [2024-06-28 03:11:48,215 INFO L175 Difference]: Start difference. First operand has 66 places, 65 transitions, 390 flow. Second operand 6 states and 122 transitions. [2024-06-28 03:11:48,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 83 transitions, 606 flow [2024-06-28 03:11:48,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 83 transitions, 568 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-28 03:11:48,221 INFO L231 Difference]: Finished difference. Result has 68 places, 68 transitions, 428 flow [2024-06-28 03:11:48,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=352, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=428, PETRI_PLACES=68, PETRI_TRANSITIONS=68} [2024-06-28 03:11:48,223 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 24 predicate places. [2024-06-28 03:11:48,223 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 68 transitions, 428 flow [2024-06-28 03:11:48,223 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) [2024-06-28 03:11:48,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:11:48,224 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:11:48,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-28 03:11:48,224 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:11:48,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:11:48,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1327749694, now seen corresponding path program 1 times [2024-06-28 03:11:48,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:11:48,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758729032] [2024-06-28 03:11:48,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:11:48,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:11:48,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:11:49,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:11:49,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:11:49,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758729032] [2024-06-28 03:11:49,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758729032] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:11:49,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:11:49,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:11:49,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339517423] [2024-06-28 03:11:49,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:11:49,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:11:49,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:11:49,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:11:49,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:11:49,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-28 03:11:49,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 68 transitions, 428 flow. Second operand has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:11:49,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:11:49,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-28 03:11:49,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:11:49,838 INFO L124 PetriNetUnfolderBase]: 1997/3049 cut-off events. [2024-06-28 03:11:49,838 INFO L125 PetriNetUnfolderBase]: For 14852/14866 co-relation queries the response was YES. [2024-06-28 03:11:49,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11927 conditions, 3049 events. 1997/3049 cut-off events. For 14852/14866 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 15016 event pairs, 645 based on Foata normal form. 6/3028 useless extension candidates. Maximal degree in co-relation 11901. Up to 2843 conditions per place. [2024-06-28 03:11:49,853 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 83 selfloop transitions, 19 changer transitions 0/111 dead transitions. [2024-06-28 03:11:49,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 111 transitions, 770 flow [2024-06-28 03:11:49,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:11:49,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:11:49,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-28 03:11:49,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5319767441860465 [2024-06-28 03:11:49,855 INFO L175 Difference]: Start difference. First operand has 68 places, 68 transitions, 428 flow. Second operand 8 states and 183 transitions. [2024-06-28 03:11:49,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 111 transitions, 770 flow [2024-06-28 03:11:49,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 111 transitions, 718 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-28 03:11:49,864 INFO L231 Difference]: Finished difference. Result has 72 places, 72 transitions, 461 flow [2024-06-28 03:11:49,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=366, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=461, PETRI_PLACES=72, PETRI_TRANSITIONS=72} [2024-06-28 03:11:49,865 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 28 predicate places. [2024-06-28 03:11:49,865 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 72 transitions, 461 flow [2024-06-28 03:11:49,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:11:49,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:11:49,865 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:11:49,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-28 03:11:49,866 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:11:49,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:11:49,866 INFO L85 PathProgramCache]: Analyzing trace with hash 1770185885, now seen corresponding path program 1 times [2024-06-28 03:11:49,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:11:49,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094108529] [2024-06-28 03:11:49,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:11:49,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:11:49,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:11:50,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:11:50,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:11:50,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094108529] [2024-06-28 03:11:50,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094108529] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:11:50,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:11:50,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:11:50,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053071865] [2024-06-28 03:11:50,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:11:50,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:11:50,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:11:50,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:11:50,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:11:50,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-28 03:11:50,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 72 transitions, 461 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:11:50,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:11:50,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-28 03:11:50,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:11:51,333 INFO L124 PetriNetUnfolderBase]: 1832/2885 cut-off events. [2024-06-28 03:11:51,333 INFO L125 PetriNetUnfolderBase]: For 17585/17585 co-relation queries the response was YES. [2024-06-28 03:11:51,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11927 conditions, 2885 events. 1832/2885 cut-off events. For 17585/17585 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 14743 event pairs, 727 based on Foata normal form. 3/2886 useless extension candidates. Maximal degree in co-relation 11899. Up to 2668 conditions per place. [2024-06-28 03:11:51,346 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 67 selfloop transitions, 22 changer transitions 0/96 dead transitions. [2024-06-28 03:11:51,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 96 transitions, 759 flow [2024-06-28 03:11:51,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:11:51,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:11:51,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 144 transitions. [2024-06-28 03:11:51,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47840531561461797 [2024-06-28 03:11:51,348 INFO L175 Difference]: Start difference. First operand has 72 places, 72 transitions, 461 flow. Second operand 7 states and 144 transitions. [2024-06-28 03:11:51,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 96 transitions, 759 flow [2024-06-28 03:11:51,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 96 transitions, 700 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-28 03:11:51,356 INFO L231 Difference]: Finished difference. Result has 74 places, 76 transitions, 497 flow [2024-06-28 03:11:51,356 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=402, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=497, PETRI_PLACES=74, PETRI_TRANSITIONS=76} [2024-06-28 03:11:51,357 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 30 predicate places. [2024-06-28 03:11:51,357 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 76 transitions, 497 flow [2024-06-28 03:11:51,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:11:51,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:11:51,357 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:11:51,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-28 03:11:51,358 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:11:51,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:11:51,358 INFO L85 PathProgramCache]: Analyzing trace with hash -1195474085, now seen corresponding path program 1 times [2024-06-28 03:11:51,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:11:51,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8205290] [2024-06-28 03:11:51,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:11:51,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:11:51,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:11:52,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:11:52,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:11:52,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8205290] [2024-06-28 03:11:52,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8205290] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:11:52,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:11:52,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:11:52,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27028554] [2024-06-28 03:11:52,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:11:52,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:11:52,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:11:52,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:11:52,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:11:52,161 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-28 03:11:52,161 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 76 transitions, 497 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:11:52,161 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:11:52,161 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-28 03:11:52,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:11:52,659 INFO L124 PetriNetUnfolderBase]: 2058/3123 cut-off events. [2024-06-28 03:11:52,660 INFO L125 PetriNetUnfolderBase]: For 23391/23410 co-relation queries the response was YES. [2024-06-28 03:11:52,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13779 conditions, 3123 events. 2058/3123 cut-off events. For 23391/23410 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 15204 event pairs, 796 based on Foata normal form. 3/3100 useless extension candidates. Maximal degree in co-relation 13749. Up to 2953 conditions per place. [2024-06-28 03:11:52,679 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 79 selfloop transitions, 15 changer transitions 0/103 dead transitions. [2024-06-28 03:11:52,680 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 103 transitions, 787 flow [2024-06-28 03:11:52,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:11:52,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:11:52,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-28 03:11:52,681 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45514950166112955 [2024-06-28 03:11:52,681 INFO L175 Difference]: Start difference. First operand has 74 places, 76 transitions, 497 flow. Second operand 7 states and 137 transitions. [2024-06-28 03:11:52,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 103 transitions, 787 flow [2024-06-28 03:11:52,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 103 transitions, 722 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-28 03:11:52,691 INFO L231 Difference]: Finished difference. Result has 76 places, 79 transitions, 512 flow [2024-06-28 03:11:52,692 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=432, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=512, PETRI_PLACES=76, PETRI_TRANSITIONS=79} [2024-06-28 03:11:52,692 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 32 predicate places. [2024-06-28 03:11:52,692 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 79 transitions, 512 flow [2024-06-28 03:11:52,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:11:52,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:11:52,693 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:11:52,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-28 03:11:52,693 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:11:52,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:11:52,693 INFO L85 PathProgramCache]: Analyzing trace with hash -1195294347, now seen corresponding path program 1 times [2024-06-28 03:11:52,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:11:52,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262326205] [2024-06-28 03:11:52,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:11:52,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:11:52,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:11:53,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:11:53,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:11:53,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262326205] [2024-06-28 03:11:53,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262326205] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:11:53,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:11:53,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:11:53,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544533883] [2024-06-28 03:11:53,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:11:53,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:11:53,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:11:53,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:11:53,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:11:53,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-28 03:11:53,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 79 transitions, 512 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:11:53,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:11:53,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-28 03:11:53,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:11:53,979 INFO L124 PetriNetUnfolderBase]: 2159/3251 cut-off events. [2024-06-28 03:11:53,979 INFO L125 PetriNetUnfolderBase]: For 28358/28358 co-relation queries the response was YES. [2024-06-28 03:11:53,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14999 conditions, 3251 events. 2159/3251 cut-off events. For 28358/28358 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 15794 event pairs, 822 based on Foata normal form. 3/3252 useless extension candidates. Maximal degree in co-relation 14968. Up to 3123 conditions per place. [2024-06-28 03:11:53,999 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 84 selfloop transitions, 23 changer transitions 0/114 dead transitions. [2024-06-28 03:11:53,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 114 transitions, 954 flow [2024-06-28 03:11:54,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:11:54,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:11:54,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 142 transitions. [2024-06-28 03:11:54,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4717607973421927 [2024-06-28 03:11:54,001 INFO L175 Difference]: Start difference. First operand has 76 places, 79 transitions, 512 flow. Second operand 7 states and 142 transitions. [2024-06-28 03:11:54,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 114 transitions, 954 flow [2024-06-28 03:11:54,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 114 transitions, 898 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-28 03:11:54,014 INFO L231 Difference]: Finished difference. Result has 80 places, 90 transitions, 641 flow [2024-06-28 03:11:54,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=456, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=641, PETRI_PLACES=80, PETRI_TRANSITIONS=90} [2024-06-28 03:11:54,015 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 36 predicate places. [2024-06-28 03:11:54,015 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 90 transitions, 641 flow [2024-06-28 03:11:54,015 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) [2024-06-28 03:11:54,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:11:54,016 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:11:54,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-28 03:11:54,016 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:11:54,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:11:54,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1118452243, now seen corresponding path program 2 times [2024-06-28 03:11:54,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:11:54,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308766631] [2024-06-28 03:11:54,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:11:54,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:11:54,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:11:54,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:11:54,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:11:54,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308766631] [2024-06-28 03:11:54,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308766631] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:11:54,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:11:54,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:11:54,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459420591] [2024-06-28 03:11:54,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:11:54,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:11:54,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:11:54,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:11:54,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:11:54,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-28 03:11:54,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 90 transitions, 641 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:11:54,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:11:54,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-28 03:11:54,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:11:55,326 INFO L124 PetriNetUnfolderBase]: 2127/3211 cut-off events. [2024-06-28 03:11:55,326 INFO L125 PetriNetUnfolderBase]: For 34750/34783 co-relation queries the response was YES. [2024-06-28 03:11:55,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15970 conditions, 3211 events. 2127/3211 cut-off events. For 34750/34783 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 15493 event pairs, 776 based on Foata normal form. 3/3188 useless extension candidates. Maximal degree in co-relation 15936. Up to 3014 conditions per place. [2024-06-28 03:11:55,344 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 82 selfloop transitions, 20 changer transitions 0/114 dead transitions. [2024-06-28 03:11:55,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 114 transitions, 947 flow [2024-06-28 03:11:55,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:11:55,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:11:55,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-28 03:11:55,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45182724252491696 [2024-06-28 03:11:55,345 INFO L175 Difference]: Start difference. First operand has 80 places, 90 transitions, 641 flow. Second operand 7 states and 136 transitions. [2024-06-28 03:11:55,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 114 transitions, 947 flow [2024-06-28 03:11:55,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 114 transitions, 894 flow, removed 22 selfloop flow, removed 2 redundant places. [2024-06-28 03:11:55,361 INFO L231 Difference]: Finished difference. Result has 85 places, 93 transitions, 688 flow [2024-06-28 03:11:55,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=588, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=688, PETRI_PLACES=85, PETRI_TRANSITIONS=93} [2024-06-28 03:11:55,361 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 41 predicate places. [2024-06-28 03:11:55,361 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 93 transitions, 688 flow [2024-06-28 03:11:55,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:11:55,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:11:55,362 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:11:55,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-28 03:11:55,362 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:11:55,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:11:55,362 INFO L85 PathProgramCache]: Analyzing trace with hash -958822317, now seen corresponding path program 2 times [2024-06-28 03:11:55,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:11:55,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159202418] [2024-06-28 03:11:55,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:11:55,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:11:55,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:11:56,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:11:56,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:11:56,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159202418] [2024-06-28 03:11:56,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159202418] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:11:56,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:11:56,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:11:56,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992956304] [2024-06-28 03:11:56,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:11:56,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:11:56,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:11:56,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:11:56,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:11:56,174 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-28 03:11:56,175 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 93 transitions, 688 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:11:56,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:11:56,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-28 03:11:56,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:11:56,613 INFO L124 PetriNetUnfolderBase]: 2198/3308 cut-off events. [2024-06-28 03:11:56,613 INFO L125 PetriNetUnfolderBase]: For 41056/41069 co-relation queries the response was YES. [2024-06-28 03:11:56,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17082 conditions, 3308 events. 2198/3308 cut-off events. For 41056/41069 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 16006 event pairs, 822 based on Foata normal form. 13/3318 useless extension candidates. Maximal degree in co-relation 17046. Up to 3083 conditions per place. [2024-06-28 03:11:56,633 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 78 selfloop transitions, 42 changer transitions 0/128 dead transitions. [2024-06-28 03:11:56,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 128 transitions, 1234 flow [2024-06-28 03:11:56,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:11:56,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:11:56,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 143 transitions. [2024-06-28 03:11:56,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4750830564784053 [2024-06-28 03:11:56,635 INFO L175 Difference]: Start difference. First operand has 85 places, 93 transitions, 688 flow. Second operand 7 states and 143 transitions. [2024-06-28 03:11:56,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 128 transitions, 1234 flow [2024-06-28 03:11:56,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 128 transitions, 1158 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-28 03:11:56,654 INFO L231 Difference]: Finished difference. Result has 88 places, 105 transitions, 883 flow [2024-06-28 03:11:56,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=612, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=883, PETRI_PLACES=88, PETRI_TRANSITIONS=105} [2024-06-28 03:11:56,654 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 44 predicate places. [2024-06-28 03:11:56,654 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 105 transitions, 883 flow [2024-06-28 03:11:56,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:11:56,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:11:56,655 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:11:56,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-28 03:11:56,655 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:11:56,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:11:56,655 INFO L85 PathProgramCache]: Analyzing trace with hash -959118987, now seen corresponding path program 3 times [2024-06-28 03:11:56,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:11:56,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939972758] [2024-06-28 03:11:56,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:11:56,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:11:56,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:11:57,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:11:57,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:11:57,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939972758] [2024-06-28 03:11:57,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939972758] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:11:57,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:11:57,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:11:57,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588792409] [2024-06-28 03:11:57,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:11:57,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:11:57,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:11:57,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:11:57,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:11:57,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-28 03:11:57,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 105 transitions, 883 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:11:57,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:11:57,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-28 03:11:57,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:11:57,974 INFO L124 PetriNetUnfolderBase]: 2192/3299 cut-off events. [2024-06-28 03:11:57,974 INFO L125 PetriNetUnfolderBase]: For 47308/47312 co-relation queries the response was YES. [2024-06-28 03:11:57,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18097 conditions, 3299 events. 2192/3299 cut-off events. For 47308/47312 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 15918 event pairs, 822 based on Foata normal form. 7/3304 useless extension candidates. Maximal degree in co-relation 18059. Up to 3079 conditions per place. [2024-06-28 03:11:57,994 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 80 selfloop transitions, 40 changer transitions 0/128 dead transitions. [2024-06-28 03:11:57,994 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 128 transitions, 1274 flow [2024-06-28 03:11:57,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:11:57,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:11:57,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-28 03:11:57,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4476744186046512 [2024-06-28 03:11:57,996 INFO L175 Difference]: Start difference. First operand has 88 places, 105 transitions, 883 flow. Second operand 8 states and 154 transitions. [2024-06-28 03:11:57,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 128 transitions, 1274 flow [2024-06-28 03:11:58,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 128 transitions, 1178 flow, removed 42 selfloop flow, removed 2 redundant places. [2024-06-28 03:11:58,033 INFO L231 Difference]: Finished difference. Result has 95 places, 107 transitions, 898 flow [2024-06-28 03:11:58,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=788, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=898, PETRI_PLACES=95, PETRI_TRANSITIONS=107} [2024-06-28 03:11:58,035 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 51 predicate places. [2024-06-28 03:11:58,035 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 107 transitions, 898 flow [2024-06-28 03:11:58,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:11:58,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:11:58,035 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:11:58,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-28 03:11:58,036 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:11:58,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:11:58,036 INFO L85 PathProgramCache]: Analyzing trace with hash -959119235, now seen corresponding path program 3 times [2024-06-28 03:11:58,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:11:58,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162611976] [2024-06-28 03:11:58,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:11:58,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:11:58,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:11:58,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:11:58,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:11:58,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162611976] [2024-06-28 03:11:58,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162611976] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:11:58,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:11:58,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:11:58,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817350963] [2024-06-28 03:11:58,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:11:58,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:11:58,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:11:58,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:11:58,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:11:58,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-28 03:11:58,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 107 transitions, 898 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:11:58,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:11:58,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-28 03:11:58,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:11:59,376 INFO L124 PetriNetUnfolderBase]: 2142/3235 cut-off events. [2024-06-28 03:11:59,376 INFO L125 PetriNetUnfolderBase]: For 47947/47986 co-relation queries the response was YES. [2024-06-28 03:11:59,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17492 conditions, 3235 events. 2142/3235 cut-off events. For 47947/47986 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 15568 event pairs, 787 based on Foata normal form. 7/3216 useless extension candidates. Maximal degree in co-relation 17451. Up to 3003 conditions per place. [2024-06-28 03:11:59,400 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 88 selfloop transitions, 26 changer transitions 0/129 dead transitions. [2024-06-28 03:11:59,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 129 transitions, 1230 flow [2024-06-28 03:11:59,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:11:59,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:11:59,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-28 03:11:59,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4485049833887043 [2024-06-28 03:11:59,404 INFO L175 Difference]: Start difference. First operand has 95 places, 107 transitions, 898 flow. Second operand 7 states and 135 transitions. [2024-06-28 03:11:59,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 129 transitions, 1230 flow [2024-06-28 03:11:59,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 129 transitions, 1100 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-28 03:11:59,433 INFO L231 Difference]: Finished difference. Result has 95 places, 110 transitions, 888 flow [2024-06-28 03:11:59,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=770, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=888, PETRI_PLACES=95, PETRI_TRANSITIONS=110} [2024-06-28 03:11:59,434 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 51 predicate places. [2024-06-28 03:11:59,434 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 110 transitions, 888 flow [2024-06-28 03:11:59,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:11:59,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:11:59,435 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:11:59,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-28 03:11:59,435 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:11:59,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:11:59,436 INFO L85 PathProgramCache]: Analyzing trace with hash -958811405, now seen corresponding path program 1 times [2024-06-28 03:11:59,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:11:59,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192081540] [2024-06-28 03:11:59,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:11:59,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:11:59,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:12:00,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:12:00,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:12:00,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192081540] [2024-06-28 03:12:00,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192081540] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:12:00,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:12:00,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:12:00,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545786875] [2024-06-28 03:12:00,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:12:00,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:12:00,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:12:00,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:12:00,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:12:00,673 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-28 03:12:00,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 110 transitions, 888 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) [2024-06-28 03:12:00,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:12:00,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-28 03:12:00,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:12:01,135 INFO L124 PetriNetUnfolderBase]: 1910/3013 cut-off events. [2024-06-28 03:12:01,135 INFO L125 PetriNetUnfolderBase]: For 46677/46677 co-relation queries the response was YES. [2024-06-28 03:12:01,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16088 conditions, 3013 events. 1910/3013 cut-off events. For 46677/46677 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 15287 event pairs, 672 based on Foata normal form. 6/3017 useless extension candidates. Maximal degree in co-relation 16048. Up to 2741 conditions per place. [2024-06-28 03:12:01,152 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 103 selfloop transitions, 25 changer transitions 0/138 dead transitions. [2024-06-28 03:12:01,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 138 transitions, 1320 flow [2024-06-28 03:12:01,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:12:01,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:12:01,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2024-06-28 03:12:01,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4738372093023256 [2024-06-28 03:12:01,154 INFO L175 Difference]: Start difference. First operand has 95 places, 110 transitions, 888 flow. Second operand 8 states and 163 transitions. [2024-06-28 03:12:01,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 138 transitions, 1320 flow [2024-06-28 03:12:01,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 138 transitions, 1226 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-28 03:12:01,179 INFO L231 Difference]: Finished difference. Result has 98 places, 113 transitions, 908 flow [2024-06-28 03:12:01,179 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=794, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=908, PETRI_PLACES=98, PETRI_TRANSITIONS=113} [2024-06-28 03:12:01,179 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 54 predicate places. [2024-06-28 03:12:01,179 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 113 transitions, 908 flow [2024-06-28 03:12:01,180 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) [2024-06-28 03:12:01,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:12:01,180 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:12:01,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-28 03:12:01,180 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:12:01,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:12:01,181 INFO L85 PathProgramCache]: Analyzing trace with hash -1404750099, now seen corresponding path program 1 times [2024-06-28 03:12:01,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:12:01,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662034135] [2024-06-28 03:12:01,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:12:01,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:12:01,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:12:01,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:12:01,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:12:01,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662034135] [2024-06-28 03:12:01,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662034135] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:12:01,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:12:01,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 03:12:01,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963399785] [2024-06-28 03:12:01,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:12:01,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 03:12:01,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:12:01,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 03:12:01,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-28 03:12:01,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-28 03:12:01,791 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 113 transitions, 908 flow. Second operand has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:12:01,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:12:01,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-28 03:12:01,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:12:02,238 INFO L124 PetriNetUnfolderBase]: 1908/3009 cut-off events. [2024-06-28 03:12:02,238 INFO L125 PetriNetUnfolderBase]: For 50378/50378 co-relation queries the response was YES. [2024-06-28 03:12:02,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16566 conditions, 3009 events. 1908/3009 cut-off events. For 50378/50378 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 15322 event pairs, 691 based on Foata normal form. 1/3008 useless extension candidates. Maximal degree in co-relation 16525. Up to 2810 conditions per place. [2024-06-28 03:12:02,256 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 101 selfloop transitions, 9 changer transitions 0/120 dead transitions. [2024-06-28 03:12:02,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 120 transitions, 1146 flow [2024-06-28 03:12:02,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 03:12:02,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 03:12:02,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 97 transitions. [2024-06-28 03:12:02,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4511627906976744 [2024-06-28 03:12:02,258 INFO L175 Difference]: Start difference. First operand has 98 places, 113 transitions, 908 flow. Second operand 5 states and 97 transitions. [2024-06-28 03:12:02,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 120 transitions, 1146 flow [2024-06-28 03:12:02,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 120 transitions, 1048 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-28 03:12:02,285 INFO L231 Difference]: Finished difference. Result has 97 places, 113 transitions, 834 flow [2024-06-28 03:12:02,286 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=810, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=834, PETRI_PLACES=97, PETRI_TRANSITIONS=113} [2024-06-28 03:12:02,286 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 53 predicate places. [2024-06-28 03:12:02,286 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 113 transitions, 834 flow [2024-06-28 03:12:02,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:12:02,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:12:02,286 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:12:02,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-28 03:12:02,287 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:12:02,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:12:02,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1682484728, now seen corresponding path program 1 times [2024-06-28 03:12:02,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:12:02,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855078] [2024-06-28 03:12:02,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:12:02,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:12:02,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:12:03,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:12:03,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:12:03,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855078] [2024-06-28 03:12:03,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855078] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:12:03,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:12:03,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:12:03,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673510688] [2024-06-28 03:12:03,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:12:03,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:12:03,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:12:03,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:12:03,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:12:03,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-28 03:12:03,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 113 transitions, 834 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:12:03,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:12:03,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-28 03:12:03,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:12:03,789 INFO L124 PetriNetUnfolderBase]: 2155/3263 cut-off events. [2024-06-28 03:12:03,790 INFO L125 PetriNetUnfolderBase]: For 63761/63779 co-relation queries the response was YES. [2024-06-28 03:12:03,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18611 conditions, 3263 events. 2155/3263 cut-off events. For 63761/63779 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 15850 event pairs, 746 based on Foata normal form. 6/3253 useless extension candidates. Maximal degree in co-relation 18569. Up to 3040 conditions per place. [2024-06-28 03:12:03,812 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 112 selfloop transitions, 19 changer transitions 0/147 dead transitions. [2024-06-28 03:12:03,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 147 transitions, 1236 flow [2024-06-28 03:12:03,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:12:03,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:12:03,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-28 03:12:03,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45930232558139533 [2024-06-28 03:12:03,814 INFO L175 Difference]: Start difference. First operand has 97 places, 113 transitions, 834 flow. Second operand 8 states and 158 transitions. [2024-06-28 03:12:03,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 147 transitions, 1236 flow [2024-06-28 03:12:03,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 147 transitions, 1218 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-28 03:12:03,842 INFO L231 Difference]: Finished difference. Result has 102 places, 116 transitions, 922 flow [2024-06-28 03:12:03,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=816, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=922, PETRI_PLACES=102, PETRI_TRANSITIONS=116} [2024-06-28 03:12:03,843 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 58 predicate places. [2024-06-28 03:12:03,843 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 116 transitions, 922 flow [2024-06-28 03:12:03,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:12:03,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:12:03,843 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:12:03,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-28 03:12:03,843 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:12:03,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:12:03,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1682334998, now seen corresponding path program 2 times [2024-06-28 03:12:03,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:12:03,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103319104] [2024-06-28 03:12:03,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:12:03,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:12:03,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:12:04,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:12:04,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:12:04,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103319104] [2024-06-28 03:12:04,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103319104] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:12:04,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:12:04,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:12:04,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035651620] [2024-06-28 03:12:04,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:12:04,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:12:04,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:12:04,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:12:04,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:12:04,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-28 03:12:04,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 116 transitions, 922 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:12:04,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:12:04,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-28 03:12:04,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:12:05,230 INFO L124 PetriNetUnfolderBase]: 2177/3300 cut-off events. [2024-06-28 03:12:05,231 INFO L125 PetriNetUnfolderBase]: For 71730/71748 co-relation queries the response was YES. [2024-06-28 03:12:05,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19568 conditions, 3300 events. 2177/3300 cut-off events. For 71730/71748 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 16098 event pairs, 746 based on Foata normal form. 6/3290 useless extension candidates. Maximal degree in co-relation 19525. Up to 3045 conditions per place. [2024-06-28 03:12:05,250 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 108 selfloop transitions, 24 changer transitions 0/148 dead transitions. [2024-06-28 03:12:05,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 148 transitions, 1326 flow [2024-06-28 03:12:05,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:12:05,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:12:05,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-28 03:12:05,253 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45930232558139533 [2024-06-28 03:12:05,253 INFO L175 Difference]: Start difference. First operand has 102 places, 116 transitions, 922 flow. Second operand 8 states and 158 transitions. [2024-06-28 03:12:05,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 148 transitions, 1326 flow [2024-06-28 03:12:05,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 148 transitions, 1244 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-28 03:12:05,290 INFO L231 Difference]: Finished difference. Result has 104 places, 119 transitions, 962 flow [2024-06-28 03:12:05,290 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=840, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=962, PETRI_PLACES=104, PETRI_TRANSITIONS=119} [2024-06-28 03:12:05,290 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 60 predicate places. [2024-06-28 03:12:05,291 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 119 transitions, 962 flow [2024-06-28 03:12:05,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:12:05,291 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:12:05,291 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:12:05,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-28 03:12:05,291 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:12:05,292 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:12:05,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1595009975, now seen corresponding path program 1 times [2024-06-28 03:12:05,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:12:05,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85554246] [2024-06-28 03:12:05,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:12:05,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:12:05,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:12:06,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:12:06,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:12:06,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85554246] [2024-06-28 03:12:06,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85554246] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:12:06,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:12:06,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:12:06,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999910729] [2024-06-28 03:12:06,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:12:06,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:12:06,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:12:06,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:12:06,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:12:06,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-28 03:12:06,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 119 transitions, 962 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:12:06,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:12:06,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-28 03:12:06,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:12:06,925 INFO L124 PetriNetUnfolderBase]: 2428/3604 cut-off events. [2024-06-28 03:12:06,926 INFO L125 PetriNetUnfolderBase]: For 81997/81997 co-relation queries the response was YES. [2024-06-28 03:12:06,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21802 conditions, 3604 events. 2428/3604 cut-off events. For 81997/81997 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 17098 event pairs, 783 based on Foata normal form. 3/3603 useless extension candidates. Maximal degree in co-relation 21758. Up to 3464 conditions per place. [2024-06-28 03:12:06,949 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 132 selfloop transitions, 39 changer transitions 0/175 dead transitions. [2024-06-28 03:12:06,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 175 transitions, 1839 flow [2024-06-28 03:12:06,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:12:06,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:12:06,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-28 03:12:06,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4315245478036176 [2024-06-28 03:12:06,951 INFO L175 Difference]: Start difference. First operand has 104 places, 119 transitions, 962 flow. Second operand 9 states and 167 transitions. [2024-06-28 03:12:06,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 175 transitions, 1839 flow [2024-06-28 03:12:06,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 175 transitions, 1726 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-28 03:12:06,991 INFO L231 Difference]: Finished difference. Result has 110 places, 144 transitions, 1271 flow [2024-06-28 03:12:06,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=864, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1271, PETRI_PLACES=110, PETRI_TRANSITIONS=144} [2024-06-28 03:12:06,992 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 66 predicate places. [2024-06-28 03:12:06,992 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 144 transitions, 1271 flow [2024-06-28 03:12:06,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:12:06,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:12:06,993 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:12:06,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-28 03:12:06,993 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:12:06,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:12:06,994 INFO L85 PathProgramCache]: Analyzing trace with hash 38707171, now seen corresponding path program 2 times [2024-06-28 03:12:06,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:12:06,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797827021] [2024-06-28 03:12:06,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:12:06,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:12:07,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:12:07,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:12:07,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:12:07,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797827021] [2024-06-28 03:12:07,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797827021] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:12:07,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:12:07,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:12:07,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311604512] [2024-06-28 03:12:07,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:12:07,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:12:07,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:12:07,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:12:07,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:12:07,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-28 03:12:07,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 144 transitions, 1271 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:12:07,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:12:07,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-28 03:12:07,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:12:08,500 INFO L124 PetriNetUnfolderBase]: 2534/3755 cut-off events. [2024-06-28 03:12:08,501 INFO L125 PetriNetUnfolderBase]: For 93272/93272 co-relation queries the response was YES. [2024-06-28 03:12:08,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23744 conditions, 3755 events. 2534/3755 cut-off events. For 93272/93272 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 17845 event pairs, 781 based on Foata normal form. 3/3754 useless extension candidates. Maximal degree in co-relation 23696. Up to 3529 conditions per place. [2024-06-28 03:12:08,525 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 143 selfloop transitions, 51 changer transitions 0/198 dead transitions. [2024-06-28 03:12:08,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 198 transitions, 2213 flow [2024-06-28 03:12:08,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:12:08,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:12:08,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-28 03:12:08,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392764857881137 [2024-06-28 03:12:08,527 INFO L175 Difference]: Start difference. First operand has 110 places, 144 transitions, 1271 flow. Second operand 9 states and 170 transitions. [2024-06-28 03:12:08,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 198 transitions, 2213 flow [2024-06-28 03:12:08,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 198 transitions, 2131 flow, removed 40 selfloop flow, removed 1 redundant places. [2024-06-28 03:12:08,580 INFO L231 Difference]: Finished difference. Result has 120 places, 161 transitions, 1542 flow [2024-06-28 03:12:08,581 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1189, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1542, PETRI_PLACES=120, PETRI_TRANSITIONS=161} [2024-06-28 03:12:08,581 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 76 predicate places. [2024-06-28 03:12:08,581 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 161 transitions, 1542 flow [2024-06-28 03:12:08,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:12:08,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:12:08,582 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:12:08,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-28 03:12:08,582 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:12:08,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:12:08,582 INFO L85 PathProgramCache]: Analyzing trace with hash 312281894, now seen corresponding path program 3 times [2024-06-28 03:12:08,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:12:08,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384300475] [2024-06-28 03:12:08,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:12:08,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:12:08,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:12:09,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:12:09,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:12:09,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384300475] [2024-06-28 03:12:09,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384300475] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:12:09,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:12:09,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:12:09,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475155244] [2024-06-28 03:12:09,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:12:09,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:12:09,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:12:09,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:12:09,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:12:09,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-28 03:12:09,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 161 transitions, 1542 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:12:09,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:12:09,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-28 03:12:09,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:12:10,059 INFO L124 PetriNetUnfolderBase]: 2482/3748 cut-off events. [2024-06-28 03:12:10,059 INFO L125 PetriNetUnfolderBase]: For 104153/104191 co-relation queries the response was YES. [2024-06-28 03:12:10,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24561 conditions, 3748 events. 2482/3748 cut-off events. For 104153/104191 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 18466 event pairs, 735 based on Foata normal form. 6/3737 useless extension candidates. Maximal degree in co-relation 24508. Up to 3372 conditions per place. [2024-06-28 03:12:10,085 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 140 selfloop transitions, 41 changer transitions 0/206 dead transitions. [2024-06-28 03:12:10,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 206 transitions, 2125 flow [2024-06-28 03:12:10,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:12:10,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:12:10,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-28 03:12:10,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-28 03:12:10,086 INFO L175 Difference]: Start difference. First operand has 120 places, 161 transitions, 1542 flow. Second operand 9 states and 172 transitions. [2024-06-28 03:12:10,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 206 transitions, 2125 flow [2024-06-28 03:12:10,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 206 transitions, 2014 flow, removed 39 selfloop flow, removed 4 redundant places. [2024-06-28 03:12:10,160 INFO L231 Difference]: Finished difference. Result has 128 places, 181 transitions, 1726 flow [2024-06-28 03:12:10,160 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1431, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1726, PETRI_PLACES=128, PETRI_TRANSITIONS=181} [2024-06-28 03:12:10,161 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 84 predicate places. [2024-06-28 03:12:10,161 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 181 transitions, 1726 flow [2024-06-28 03:12:10,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:12:10,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:12:10,161 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:12:10,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-28 03:12:10,162 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:12:10,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:12:10,162 INFO L85 PathProgramCache]: Analyzing trace with hash 1600581605, now seen corresponding path program 3 times [2024-06-28 03:12:10,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:12:10,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234088265] [2024-06-28 03:12:10,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:12:10,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:12:10,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:12:10,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:12:10,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:12:10,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234088265] [2024-06-28 03:12:10,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234088265] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:12:10,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:12:10,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:12:10,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283081310] [2024-06-28 03:12:10,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:12:10,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:12:10,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:12:10,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:12:10,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:12:11,026 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-28 03:12:11,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 181 transitions, 1726 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:12:11,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:12:11,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-28 03:12:11,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:12:11,731 INFO L124 PetriNetUnfolderBase]: 2614/3887 cut-off events. [2024-06-28 03:12:11,731 INFO L125 PetriNetUnfolderBase]: For 112934/112938 co-relation queries the response was YES. [2024-06-28 03:12:11,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26076 conditions, 3887 events. 2614/3887 cut-off events. For 112934/112938 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 18701 event pairs, 781 based on Foata normal form. 7/3890 useless extension candidates. Maximal degree in co-relation 26018. Up to 3648 conditions per place. [2024-06-28 03:12:11,763 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 150 selfloop transitions, 59 changer transitions 0/213 dead transitions. [2024-06-28 03:12:11,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 213 transitions, 2445 flow [2024-06-28 03:12:11,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:12:11,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:12:11,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-28 03:12:11,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-06-28 03:12:11,765 INFO L175 Difference]: Start difference. First operand has 128 places, 181 transitions, 1726 flow. Second operand 9 states and 168 transitions. [2024-06-28 03:12:11,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 213 transitions, 2445 flow [2024-06-28 03:12:11,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 213 transitions, 2343 flow, removed 35 selfloop flow, removed 2 redundant places. [2024-06-28 03:12:11,869 INFO L231 Difference]: Finished difference. Result has 137 places, 187 transitions, 1896 flow [2024-06-28 03:12:11,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1624, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1896, PETRI_PLACES=137, PETRI_TRANSITIONS=187} [2024-06-28 03:12:11,870 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 93 predicate places. [2024-06-28 03:12:11,870 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 187 transitions, 1896 flow [2024-06-28 03:12:11,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:12:11,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:12:11,871 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:12:11,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-28 03:12:11,871 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:12:11,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:12:11,872 INFO L85 PathProgramCache]: Analyzing trace with hash 1600581884, now seen corresponding path program 1 times [2024-06-28 03:12:11,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:12:11,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321321265] [2024-06-28 03:12:11,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:12:11,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:12:11,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:12:12,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:12:12,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:12:12,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321321265] [2024-06-28 03:12:12,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321321265] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:12:12,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:12:12,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:12:12,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701591624] [2024-06-28 03:12:12,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:12:12,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:12:12,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:12:12,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:12:12,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:12:12,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-28 03:12:12,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 187 transitions, 1896 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:12:12,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:12:12,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-28 03:12:12,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:12:13,648 INFO L124 PetriNetUnfolderBase]: 2522/3800 cut-off events. [2024-06-28 03:12:13,648 INFO L125 PetriNetUnfolderBase]: For 119603/119612 co-relation queries the response was YES. [2024-06-28 03:12:13,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25804 conditions, 3800 events. 2522/3800 cut-off events. For 119603/119612 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 18682 event pairs, 777 based on Foata normal form. 9/3804 useless extension candidates. Maximal degree in co-relation 25742. Up to 3508 conditions per place. [2024-06-28 03:12:13,672 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 154 selfloop transitions, 43 changer transitions 0/217 dead transitions. [2024-06-28 03:12:13,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 217 transitions, 2526 flow [2024-06-28 03:12:13,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:12:13,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:12:13,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-28 03:12:13,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4622093023255814 [2024-06-28 03:12:13,674 INFO L175 Difference]: Start difference. First operand has 137 places, 187 transitions, 1896 flow. Second operand 8 states and 159 transitions. [2024-06-28 03:12:13,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 217 transitions, 2526 flow [2024-06-28 03:12:13,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 217 transitions, 2397 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-28 03:12:13,753 INFO L231 Difference]: Finished difference. Result has 140 places, 191 transitions, 1945 flow [2024-06-28 03:12:13,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1767, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1945, PETRI_PLACES=140, PETRI_TRANSITIONS=191} [2024-06-28 03:12:13,753 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 96 predicate places. [2024-06-28 03:12:13,753 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 191 transitions, 1945 flow [2024-06-28 03:12:13,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:12:13,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:12:13,754 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:12:13,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-28 03:12:13,754 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:12:13,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:12:13,754 INFO L85 PathProgramCache]: Analyzing trace with hash 513379080, now seen corresponding path program 2 times [2024-06-28 03:12:13,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:12:13,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261476307] [2024-06-28 03:12:13,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:12:13,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:12:13,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:12:14,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:12:14,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:12:14,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261476307] [2024-06-28 03:12:14,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261476307] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:12:14,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:12:14,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:12:14,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60884292] [2024-06-28 03:12:14,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:12:14,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:12:14,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:12:14,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:12:14,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:12:14,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-28 03:12:14,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 191 transitions, 1945 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:12:14,733 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:12:14,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-28 03:12:14,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:12:15,517 INFO L124 PetriNetUnfolderBase]: 2542/3830 cut-off events. [2024-06-28 03:12:15,517 INFO L125 PetriNetUnfolderBase]: For 128532/128540 co-relation queries the response was YES. [2024-06-28 03:12:15,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26738 conditions, 3830 events. 2542/3830 cut-off events. For 128532/128540 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 18864 event pairs, 765 based on Foata normal form. 11/3838 useless extension candidates. Maximal degree in co-relation 26675. Up to 3455 conditions per place. [2024-06-28 03:12:15,548 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 146 selfloop transitions, 54 changer transitions 0/220 dead transitions. [2024-06-28 03:12:15,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 220 transitions, 2639 flow [2024-06-28 03:12:15,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:12:15,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:12:15,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-28 03:12:15,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-28 03:12:15,550 INFO L175 Difference]: Start difference. First operand has 140 places, 191 transitions, 1945 flow. Second operand 8 states and 160 transitions. [2024-06-28 03:12:15,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 220 transitions, 2639 flow [2024-06-28 03:12:15,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 220 transitions, 2489 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-28 03:12:15,635 INFO L231 Difference]: Finished difference. Result has 142 places, 195 transitions, 2002 flow [2024-06-28 03:12:15,636 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1795, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2002, PETRI_PLACES=142, PETRI_TRANSITIONS=195} [2024-06-28 03:12:15,636 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 98 predicate places. [2024-06-28 03:12:15,636 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 195 transitions, 2002 flow [2024-06-28 03:12:15,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:12:15,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:12:15,637 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:12:15,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-28 03:12:15,637 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:12:15,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:12:15,637 INFO L85 PathProgramCache]: Analyzing trace with hash 1801670855, now seen corresponding path program 4 times [2024-06-28 03:12:15,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:12:15,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315354168] [2024-06-28 03:12:15,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:12:15,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:12:15,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:12:16,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:12:16,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:12:16,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315354168] [2024-06-28 03:12:16,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315354168] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:12:16,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:12:16,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:12:16,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394379654] [2024-06-28 03:12:16,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:12:16,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:12:16,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:12:16,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:12:16,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:12:16,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-28 03:12:16,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 195 transitions, 2002 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:12:16,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:12:16,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-28 03:12:16,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:12:17,192 INFO L124 PetriNetUnfolderBase]: 2724/4047 cut-off events. [2024-06-28 03:12:17,193 INFO L125 PetriNetUnfolderBase]: For 143387/143395 co-relation queries the response was YES. [2024-06-28 03:12:17,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29407 conditions, 4047 events. 2724/4047 cut-off events. For 143387/143395 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 19551 event pairs, 770 based on Foata normal form. 11/4053 useless extension candidates. Maximal degree in co-relation 29343. Up to 3552 conditions per place. [2024-06-28 03:12:17,223 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 155 selfloop transitions, 83 changer transitions 0/242 dead transitions. [2024-06-28 03:12:17,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 242 transitions, 3326 flow [2024-06-28 03:12:17,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:12:17,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:12:17,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-28 03:12:17,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4680232558139535 [2024-06-28 03:12:17,225 INFO L175 Difference]: Start difference. First operand has 142 places, 195 transitions, 2002 flow. Second operand 8 states and 161 transitions. [2024-06-28 03:12:17,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 242 transitions, 3326 flow [2024-06-28 03:12:17,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 242 transitions, 3149 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-28 03:12:17,331 INFO L231 Difference]: Finished difference. Result has 146 places, 210 transitions, 2336 flow [2024-06-28 03:12:17,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1825, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2336, PETRI_PLACES=146, PETRI_TRANSITIONS=210} [2024-06-28 03:12:17,332 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 102 predicate places. [2024-06-28 03:12:17,332 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 210 transitions, 2336 flow [2024-06-28 03:12:17,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:12:17,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:12:17,332 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:12:17,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-28 03:12:17,332 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:12:17,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:12:17,333 INFO L85 PathProgramCache]: Analyzing trace with hash 1801663198, now seen corresponding path program 4 times [2024-06-28 03:12:17,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:12:17,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031619568] [2024-06-28 03:12:17,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:12:17,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:12:17,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:12:18,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:12:18,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:12:18,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031619568] [2024-06-28 03:12:18,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031619568] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:12:18,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:12:18,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:12:18,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824537745] [2024-06-28 03:12:18,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:12:18,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:12:18,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:12:18,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:12:18,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:12:18,175 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-28 03:12:18,175 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 210 transitions, 2336 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:12:18,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:12:18,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-28 03:12:18,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:12:18,817 INFO L124 PetriNetUnfolderBase]: 2632/3977 cut-off events. [2024-06-28 03:12:18,817 INFO L125 PetriNetUnfolderBase]: For 160310/160357 co-relation queries the response was YES. [2024-06-28 03:12:18,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30418 conditions, 3977 events. 2632/3977 cut-off events. For 160310/160357 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 19798 event pairs, 732 based on Foata normal form. 11/3970 useless extension candidates. Maximal degree in co-relation 30351. Up to 3434 conditions per place. [2024-06-28 03:12:18,850 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 149 selfloop transitions, 61 changer transitions 0/242 dead transitions. [2024-06-28 03:12:18,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 242 transitions, 3114 flow [2024-06-28 03:12:18,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:12:18,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:12:18,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-28 03:12:18,851 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45930232558139533 [2024-06-28 03:12:18,852 INFO L175 Difference]: Start difference. First operand has 146 places, 210 transitions, 2336 flow. Second operand 8 states and 158 transitions. [2024-06-28 03:12:18,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 242 transitions, 3114 flow [2024-06-28 03:12:18,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 242 transitions, 2965 flow, removed 63 selfloop flow, removed 2 redundant places. [2024-06-28 03:12:18,974 INFO L231 Difference]: Finished difference. Result has 152 places, 216 transitions, 2507 flow [2024-06-28 03:12:18,975 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2187, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2507, PETRI_PLACES=152, PETRI_TRANSITIONS=216} [2024-06-28 03:12:18,975 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 108 predicate places. [2024-06-28 03:12:18,975 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 216 transitions, 2507 flow [2024-06-28 03:12:18,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:12:18,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:12:18,976 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:12:18,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-28 03:12:18,976 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:12:18,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:12:18,976 INFO L85 PathProgramCache]: Analyzing trace with hash 332075733, now seen corresponding path program 5 times [2024-06-28 03:12:18,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:12:18,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602908110] [2024-06-28 03:12:18,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:12:18,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:12:18,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:12:19,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:12:19,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:12:19,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602908110] [2024-06-28 03:12:19,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602908110] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:12:19,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:12:19,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:12:19,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465962447] [2024-06-28 03:12:19,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:12:19,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:12:19,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:12:19,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:12:19,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:12:19,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-28 03:12:19,828 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 216 transitions, 2507 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:12:19,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:12:19,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-28 03:12:19,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:12:20,621 INFO L124 PetriNetUnfolderBase]: 2756/4104 cut-off events. [2024-06-28 03:12:20,621 INFO L125 PetriNetUnfolderBase]: For 169018/169022 co-relation queries the response was YES. [2024-06-28 03:12:20,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31433 conditions, 4104 events. 2756/4104 cut-off events. For 169018/169022 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 19939 event pairs, 773 based on Foata normal form. 7/4106 useless extension candidates. Maximal degree in co-relation 31364. Up to 3603 conditions per place. [2024-06-28 03:12:20,658 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 161 selfloop transitions, 82 changer transitions 0/247 dead transitions. [2024-06-28 03:12:20,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 247 transitions, 3535 flow [2024-06-28 03:12:20,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:12:20,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:12:20,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-28 03:12:20,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4622093023255814 [2024-06-28 03:12:20,660 INFO L175 Difference]: Start difference. First operand has 152 places, 216 transitions, 2507 flow. Second operand 8 states and 159 transitions. [2024-06-28 03:12:20,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 247 transitions, 3535 flow [2024-06-28 03:12:20,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 247 transitions, 3355 flow, removed 76 selfloop flow, removed 4 redundant places. [2024-06-28 03:12:20,871 INFO L231 Difference]: Finished difference. Result has 156 places, 216 transitions, 2501 flow [2024-06-28 03:12:20,872 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2327, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2501, PETRI_PLACES=156, PETRI_TRANSITIONS=216} [2024-06-28 03:12:20,872 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 112 predicate places. [2024-06-28 03:12:20,872 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 216 transitions, 2501 flow [2024-06-28 03:12:20,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:12:20,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:12:20,873 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:12:20,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-28 03:12:20,873 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:12:20,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:12:20,873 INFO L85 PathProgramCache]: Analyzing trace with hash 341280222, now seen corresponding path program 3 times [2024-06-28 03:12:20,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:12:20,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746535821] [2024-06-28 03:12:20,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:12:20,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:12:20,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:12:22,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:12:22,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:12:22,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746535821] [2024-06-28 03:12:22,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746535821] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:12:22,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:12:22,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:12:22,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421793353] [2024-06-28 03:12:22,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:12:22,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:12:22,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:12:22,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:12:22,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:12:22,152 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-28 03:12:22,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 216 transitions, 2501 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:12:22,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:12:22,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-28 03:12:22,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:12:22,839 INFO L124 PetriNetUnfolderBase]: 2662/4015 cut-off events. [2024-06-28 03:12:22,839 INFO L125 PetriNetUnfolderBase]: For 175709/175713 co-relation queries the response was YES. [2024-06-28 03:12:22,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31139 conditions, 4015 events. 2662/4015 cut-off events. For 175709/175713 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 19928 event pairs, 767 based on Foata normal form. 7/4018 useless extension candidates. Maximal degree in co-relation 31068. Up to 3600 conditions per place. [2024-06-28 03:12:22,877 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 158 selfloop transitions, 62 changer transitions 0/244 dead transitions. [2024-06-28 03:12:22,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 244 transitions, 3213 flow [2024-06-28 03:12:22,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:12:22,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:12:22,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-28 03:12:22,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4622093023255814 [2024-06-28 03:12:22,878 INFO L175 Difference]: Start difference. First operand has 156 places, 216 transitions, 2501 flow. Second operand 8 states and 159 transitions. [2024-06-28 03:12:22,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 244 transitions, 3213 flow [2024-06-28 03:12:23,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 244 transitions, 3049 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-28 03:12:23,038 INFO L231 Difference]: Finished difference. Result has 158 places, 220 transitions, 2574 flow [2024-06-28 03:12:23,038 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2337, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2574, PETRI_PLACES=158, PETRI_TRANSITIONS=220} [2024-06-28 03:12:23,039 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 114 predicate places. [2024-06-28 03:12:23,039 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 220 transitions, 2574 flow [2024-06-28 03:12:23,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:12:23,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:12:23,039 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:12:23,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-28 03:12:23,040 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:12:23,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:12:23,040 INFO L85 PathProgramCache]: Analyzing trace with hash 341606652, now seen corresponding path program 4 times [2024-06-28 03:12:23,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:12:23,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643028506] [2024-06-28 03:12:23,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:12:23,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:12:23,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:12:23,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:12:23,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:12:23,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643028506] [2024-06-28 03:12:23,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643028506] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:12:23,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:12:23,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:12:23,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21807026] [2024-06-28 03:12:23,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:12:23,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:12:23,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:12:24,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:12:24,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:12:24,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-28 03:12:24,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 220 transitions, 2574 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:12:24,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:12:24,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-28 03:12:24,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:12:24,833 INFO L124 PetriNetUnfolderBase]: 2664/4018 cut-off events. [2024-06-28 03:12:24,833 INFO L125 PetriNetUnfolderBase]: For 184187/184191 co-relation queries the response was YES. [2024-06-28 03:12:24,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31762 conditions, 4018 events. 2664/4018 cut-off events. For 184187/184191 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 20024 event pairs, 768 based on Foata normal form. 7/4021 useless extension candidates. Maximal degree in co-relation 31690. Up to 3543 conditions per place. [2024-06-28 03:12:24,870 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 147 selfloop transitions, 77 changer transitions 0/248 dead transitions. [2024-06-28 03:12:24,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 248 transitions, 3306 flow [2024-06-28 03:12:24,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:12:24,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:12:24,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-28 03:12:24,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-28 03:12:24,872 INFO L175 Difference]: Start difference. First operand has 158 places, 220 transitions, 2574 flow. Second operand 8 states and 160 transitions. [2024-06-28 03:12:24,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 248 transitions, 3306 flow [2024-06-28 03:12:25,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 248 transitions, 3099 flow, removed 44 selfloop flow, removed 6 redundant places. [2024-06-28 03:12:25,122 INFO L231 Difference]: Finished difference. Result has 160 places, 224 transitions, 2642 flow [2024-06-28 03:12:25,122 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2367, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2642, PETRI_PLACES=160, PETRI_TRANSITIONS=224} [2024-06-28 03:12:25,122 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 116 predicate places. [2024-06-28 03:12:25,122 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 224 transitions, 2642 flow [2024-06-28 03:12:25,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:12:25,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:12:25,123 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:12:25,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-28 03:12:25,123 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:12:25,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:12:25,124 INFO L85 PathProgramCache]: Analyzing trace with hash 341279943, now seen corresponding path program 6 times [2024-06-28 03:12:25,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:12:25,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271032887] [2024-06-28 03:12:25,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:12:25,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:12:25,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:12:25,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:12:25,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:12:25,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271032887] [2024-06-28 03:12:25,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271032887] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:12:25,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:12:25,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:12:25,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414871418] [2024-06-28 03:12:25,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:12:25,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:12:25,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:12:25,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:12:25,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:12:25,894 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-28 03:12:25,894 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 224 transitions, 2642 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:12:25,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:12:25,895 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-28 03:12:25,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:12:26,587 INFO L124 PetriNetUnfolderBase]: 2786/4147 cut-off events. [2024-06-28 03:12:26,588 INFO L125 PetriNetUnfolderBase]: For 194827/194831 co-relation queries the response was YES. [2024-06-28 03:12:26,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33446 conditions, 4147 events. 2786/4147 cut-off events. For 194827/194831 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 20199 event pairs, 771 based on Foata normal form. 7/4149 useless extension candidates. Maximal degree in co-relation 33373. Up to 3646 conditions per place. [2024-06-28 03:12:26,623 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 146 selfloop transitions, 109 changer transitions 0/259 dead transitions. [2024-06-28 03:12:26,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 259 transitions, 3698 flow [2024-06-28 03:12:26,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:12:26,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:12:26,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-28 03:12:26,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4563953488372093 [2024-06-28 03:12:26,625 INFO L175 Difference]: Start difference. First operand has 160 places, 224 transitions, 2642 flow. Second operand 8 states and 157 transitions. [2024-06-28 03:12:26,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 259 transitions, 3698 flow [2024-06-28 03:12:26,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 259 transitions, 3453 flow, removed 48 selfloop flow, removed 6 redundant places. [2024-06-28 03:12:26,780 INFO L231 Difference]: Finished difference. Result has 163 places, 233 transitions, 2928 flow [2024-06-28 03:12:26,781 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2397, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2928, PETRI_PLACES=163, PETRI_TRANSITIONS=233} [2024-06-28 03:12:26,781 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 119 predicate places. [2024-06-28 03:12:26,781 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 233 transitions, 2928 flow [2024-06-28 03:12:26,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:12:26,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:12:26,782 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:12:26,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-28 03:12:26,782 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:12:26,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:12:26,782 INFO L85 PathProgramCache]: Analyzing trace with hash -203067415, now seen corresponding path program 7 times [2024-06-28 03:12:26,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:12:26,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292568515] [2024-06-28 03:12:26,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:12:26,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:12:26,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:12:27,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:12:27,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:12:27,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292568515] [2024-06-28 03:12:27,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292568515] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:12:27,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:12:27,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:12:27,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389198353] [2024-06-28 03:12:27,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:12:27,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:12:27,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:12:27,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:12:27,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:12:27,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-28 03:12:27,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 233 transitions, 2928 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:12:27,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:12:27,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-28 03:12:27,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:12:28,367 INFO L124 PetriNetUnfolderBase]: 2903/4315 cut-off events. [2024-06-28 03:12:28,367 INFO L125 PetriNetUnfolderBase]: For 212395/212397 co-relation queries the response was YES. [2024-06-28 03:12:28,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35811 conditions, 4315 events. 2903/4315 cut-off events. For 212395/212397 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 21081 event pairs, 778 based on Foata normal form. 5/4318 useless extension candidates. Maximal degree in co-relation 35736. Up to 4105 conditions per place. [2024-06-28 03:12:28,408 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 236 selfloop transitions, 62 changer transitions 0/302 dead transitions. [2024-06-28 03:12:28,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 302 transitions, 4476 flow [2024-06-28 03:12:28,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:12:28,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:12:28,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-28 03:12:28,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45219638242894056 [2024-06-28 03:12:28,409 INFO L175 Difference]: Start difference. First operand has 163 places, 233 transitions, 2928 flow. Second operand 9 states and 175 transitions. [2024-06-28 03:12:28,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 302 transitions, 4476 flow [2024-06-28 03:12:28,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 302 transitions, 4354 flow, removed 42 selfloop flow, removed 3 redundant places. [2024-06-28 03:12:28,631 INFO L231 Difference]: Finished difference. Result has 171 places, 264 transitions, 3604 flow [2024-06-28 03:12:28,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2818, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3604, PETRI_PLACES=171, PETRI_TRANSITIONS=264} [2024-06-28 03:12:28,631 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 127 predicate places. [2024-06-28 03:12:28,631 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 264 transitions, 3604 flow [2024-06-28 03:12:28,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:12:28,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:12:28,632 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:12:28,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-28 03:12:28,632 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:12:28,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:12:28,633 INFO L85 PathProgramCache]: Analyzing trace with hash 688688081, now seen corresponding path program 8 times [2024-06-28 03:12:28,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:12:28,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555626949] [2024-06-28 03:12:28,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:12:28,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:12:28,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:12:29,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:12:29,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:12:29,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555626949] [2024-06-28 03:12:29,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555626949] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:12:29,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:12:29,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:12:29,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264184923] [2024-06-28 03:12:29,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:12:29,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:12:29,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:12:29,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:12:29,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:12:29,427 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-28 03:12:29,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 264 transitions, 3604 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:12:29,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:12:29,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-28 03:12:29,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:12:30,313 INFO L124 PetriNetUnfolderBase]: 3056/4531 cut-off events. [2024-06-28 03:12:30,313 INFO L125 PetriNetUnfolderBase]: For 230625/230627 co-relation queries the response was YES. [2024-06-28 03:12:30,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39012 conditions, 4531 events. 3056/4531 cut-off events. For 230625/230627 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 22312 event pairs, 776 based on Foata normal form. 5/4534 useless extension candidates. Maximal degree in co-relation 38933. Up to 4271 conditions per place. [2024-06-28 03:12:30,349 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 257 selfloop transitions, 86 changer transitions 0/347 dead transitions. [2024-06-28 03:12:30,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 347 transitions, 5670 flow [2024-06-28 03:12:30,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:12:30,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:12:30,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-28 03:12:30,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45219638242894056 [2024-06-28 03:12:30,351 INFO L175 Difference]: Start difference. First operand has 171 places, 264 transitions, 3604 flow. Second operand 9 states and 175 transitions. [2024-06-28 03:12:30,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 347 transitions, 5670 flow [2024-06-28 03:12:30,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 347 transitions, 5340 flow, removed 107 selfloop flow, removed 7 redundant places. [2024-06-28 03:12:30,674 INFO L231 Difference]: Finished difference. Result has 176 places, 309 transitions, 4583 flow [2024-06-28 03:12:30,674 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3402, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4583, PETRI_PLACES=176, PETRI_TRANSITIONS=309} [2024-06-28 03:12:30,675 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 132 predicate places. [2024-06-28 03:12:30,675 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 309 transitions, 4583 flow [2024-06-28 03:12:30,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:12:30,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:12:30,675 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:12:30,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-28 03:12:30,676 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:12:30,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:12:30,676 INFO L85 PathProgramCache]: Analyzing trace with hash 411841031, now seen corresponding path program 9 times [2024-06-28 03:12:30,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:12:30,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504414524] [2024-06-28 03:12:30,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:12:30,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:12:30,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:12:31,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:12:31,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:12:31,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504414524] [2024-06-28 03:12:31,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504414524] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:12:31,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:12:31,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:12:31,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249858320] [2024-06-28 03:12:31,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:12:31,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:12:31,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:12:31,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:12:31,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:12:31,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-28 03:12:31,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 309 transitions, 4583 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:12:31,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:12:31,491 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-28 03:12:31,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:12:32,393 INFO L124 PetriNetUnfolderBase]: 3162/4683 cut-off events. [2024-06-28 03:12:32,394 INFO L125 PetriNetUnfolderBase]: For 246704/246704 co-relation queries the response was YES. [2024-06-28 03:12:32,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40884 conditions, 4683 events. 3162/4683 cut-off events. For 246704/246704 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 23087 event pairs, 782 based on Foata normal form. 3/4684 useless extension candidates. Maximal degree in co-relation 40804. Up to 4211 conditions per place. [2024-06-28 03:12:32,433 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 225 selfloop transitions, 146 changer transitions 0/375 dead transitions. [2024-06-28 03:12:32,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 375 transitions, 6303 flow [2024-06-28 03:12:32,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:12:32,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:12:32,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-28 03:12:32,434 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573643410852713 [2024-06-28 03:12:32,434 INFO L175 Difference]: Start difference. First operand has 176 places, 309 transitions, 4583 flow. Second operand 9 states and 177 transitions. [2024-06-28 03:12:32,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 375 transitions, 6303 flow [2024-06-28 03:12:32,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 375 transitions, 6138 flow, removed 47 selfloop flow, removed 4 redundant places. [2024-06-28 03:12:32,730 INFO L231 Difference]: Finished difference. Result has 183 places, 335 transitions, 5363 flow [2024-06-28 03:12:32,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4418, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5363, PETRI_PLACES=183, PETRI_TRANSITIONS=335} [2024-06-28 03:12:32,730 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 139 predicate places. [2024-06-28 03:12:32,730 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 335 transitions, 5363 flow [2024-06-28 03:12:32,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:12:32,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:12:32,731 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:12:32,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-28 03:12:32,731 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:12:32,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:12:32,731 INFO L85 PathProgramCache]: Analyzing trace with hash 411833374, now seen corresponding path program 5 times [2024-06-28 03:12:32,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:12:32,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544190478] [2024-06-28 03:12:32,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:12:32,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:12:32,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:12:33,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:12:33,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:12:33,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544190478] [2024-06-28 03:12:33,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544190478] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:12:33,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:12:33,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:12:33,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831232979] [2024-06-28 03:12:33,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:12:33,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:12:33,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:12:33,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:12:33,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:12:33,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-28 03:12:33,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 335 transitions, 5363 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:12:33,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:12:33,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-28 03:12:33,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:12:34,458 INFO L124 PetriNetUnfolderBase]: 3071/4610 cut-off events. [2024-06-28 03:12:34,459 INFO L125 PetriNetUnfolderBase]: For 256507/256549 co-relation queries the response was YES. [2024-06-28 03:12:34,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40992 conditions, 4610 events. 3071/4610 cut-off events. For 256507/256549 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 23323 event pairs, 717 based on Foata normal form. 6/4602 useless extension candidates. Maximal degree in co-relation 40910. Up to 3984 conditions per place. [2024-06-28 03:12:34,501 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 253 selfloop transitions, 74 changer transitions 0/384 dead transitions. [2024-06-28 03:12:34,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 384 transitions, 6270 flow [2024-06-28 03:12:34,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:12:34,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:12:34,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-28 03:12:34,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573643410852713 [2024-06-28 03:12:34,503 INFO L175 Difference]: Start difference. First operand has 183 places, 335 transitions, 5363 flow. Second operand 9 states and 177 transitions. [2024-06-28 03:12:34,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 384 transitions, 6270 flow [2024-06-28 03:12:34,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 384 transitions, 5740 flow, removed 76 selfloop flow, removed 8 redundant places. [2024-06-28 03:12:34,943 INFO L231 Difference]: Finished difference. Result has 187 places, 354 transitions, 5230 flow [2024-06-28 03:12:34,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4833, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5230, PETRI_PLACES=187, PETRI_TRANSITIONS=354} [2024-06-28 03:12:34,944 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 143 predicate places. [2024-06-28 03:12:34,944 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 354 transitions, 5230 flow [2024-06-28 03:12:34,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:12:34,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:12:34,945 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:12:34,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-28 03:12:34,945 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:12:34,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:12:34,945 INFO L85 PathProgramCache]: Analyzing trace with hash 411833591, now seen corresponding path program 10 times [2024-06-28 03:12:34,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:12:34,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532205847] [2024-06-28 03:12:34,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:12:34,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:12:34,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:12:35,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:12:35,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:12:35,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532205847] [2024-06-28 03:12:35,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532205847] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:12:35,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:12:35,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:12:35,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544630751] [2024-06-28 03:12:35,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:12:35,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:12:35,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:12:35,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:12:35,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:12:35,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-28 03:12:35,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 354 transitions, 5230 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:12:35,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:12:35,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-28 03:12:35,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:12:36,722 INFO L124 PetriNetUnfolderBase]: 3195/4741 cut-off events. [2024-06-28 03:12:36,723 INFO L125 PetriNetUnfolderBase]: For 263350/263350 co-relation queries the response was YES. [2024-06-28 03:12:36,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41784 conditions, 4741 events. 3195/4741 cut-off events. For 263350/263350 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 23586 event pairs, 784 based on Foata normal form. 3/4742 useless extension candidates. Maximal degree in co-relation 41699. Up to 4263 conditions per place. [2024-06-28 03:12:36,775 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 256 selfloop transitions, 127 changer transitions 0/387 dead transitions. [2024-06-28 03:12:36,776 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 387 transitions, 6412 flow [2024-06-28 03:12:36,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:12:36,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:12:36,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-28 03:12:36,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45478036175710596 [2024-06-28 03:12:36,777 INFO L175 Difference]: Start difference. First operand has 187 places, 354 transitions, 5230 flow. Second operand 9 states and 176 transitions. [2024-06-28 03:12:36,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 387 transitions, 6412 flow [2024-06-28 03:12:37,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 387 transitions, 6179 flow, removed 49 selfloop flow, removed 5 redundant places. [2024-06-28 03:12:37,227 INFO L231 Difference]: Finished difference. Result has 192 places, 355 transitions, 5348 flow [2024-06-28 03:12:37,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4997, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5348, PETRI_PLACES=192, PETRI_TRANSITIONS=355} [2024-06-28 03:12:37,228 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 148 predicate places. [2024-06-28 03:12:37,228 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 355 transitions, 5348 flow [2024-06-28 03:12:37,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:12:37,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:12:37,228 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:12:37,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-28 03:12:37,228 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:12:37,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:12:37,229 INFO L85 PathProgramCache]: Analyzing trace with hash -597578827, now seen corresponding path program 1 times [2024-06-28 03:12:37,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:12:37,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487744604] [2024-06-28 03:12:37,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:12:37,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:12:37,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:12:37,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:12:37,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:12:37,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487744604] [2024-06-28 03:12:37,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487744604] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:12:37,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:12:37,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 03:12:37,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835119829] [2024-06-28 03:12:37,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:12:37,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 03:12:37,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:12:37,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 03:12:37,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-28 03:12:37,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-28 03:12:37,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 355 transitions, 5348 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) [2024-06-28 03:12:37,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:12:37,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-28 03:12:37,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:12:38,818 INFO L124 PetriNetUnfolderBase]: 2794/4329 cut-off events. [2024-06-28 03:12:38,819 INFO L125 PetriNetUnfolderBase]: For 232699/232711 co-relation queries the response was YES. [2024-06-28 03:12:38,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37883 conditions, 4329 events. 2794/4329 cut-off events. For 232699/232711 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 22637 event pairs, 759 based on Foata normal form. 4/4320 useless extension candidates. Maximal degree in co-relation 37796. Up to 3855 conditions per place. [2024-06-28 03:12:38,863 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 301 selfloop transitions, 12 changer transitions 0/367 dead transitions. [2024-06-28 03:12:38,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 367 transitions, 6030 flow [2024-06-28 03:12:38,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 03:12:38,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 03:12:38,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 113 transitions. [2024-06-28 03:12:38,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.437984496124031 [2024-06-28 03:12:38,864 INFO L175 Difference]: Start difference. First operand has 192 places, 355 transitions, 5348 flow. Second operand 6 states and 113 transitions. [2024-06-28 03:12:38,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 367 transitions, 6030 flow [2024-06-28 03:12:39,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 367 transitions, 5785 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-28 03:12:39,323 INFO L231 Difference]: Finished difference. Result has 193 places, 358 transitions, 5167 flow [2024-06-28 03:12:39,323 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5103, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5167, PETRI_PLACES=193, PETRI_TRANSITIONS=358} [2024-06-28 03:12:39,324 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 149 predicate places. [2024-06-28 03:12:39,324 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 358 transitions, 5167 flow [2024-06-28 03:12:39,324 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) [2024-06-28 03:12:39,324 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:12:39,324 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:12:39,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-28 03:12:39,325 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:12:39,325 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:12:39,325 INFO L85 PathProgramCache]: Analyzing trace with hash -2099065894, now seen corresponding path program 1 times [2024-06-28 03:12:39,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:12:39,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504974268] [2024-06-28 03:12:39,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:12:39,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:12:39,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:12:40,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:12:40,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:12:40,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504974268] [2024-06-28 03:12:40,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504974268] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:12:40,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:12:40,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:12:40,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14535193] [2024-06-28 03:12:40,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:12:40,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:12:40,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:12:40,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:12:40,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:12:40,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-28 03:12:40,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 358 transitions, 5167 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:12:40,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:12:40,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-28 03:12:40,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:12:41,386 INFO L124 PetriNetUnfolderBase]: 3087/4653 cut-off events. [2024-06-28 03:12:41,386 INFO L125 PetriNetUnfolderBase]: For 272329/272333 co-relation queries the response was YES. [2024-06-28 03:12:41,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41369 conditions, 4653 events. 3087/4653 cut-off events. For 272329/272333 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 23633 event pairs, 745 based on Foata normal form. 4/4652 useless extension candidates. Maximal degree in co-relation 41282. Up to 4135 conditions per place. [2024-06-28 03:12:41,438 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 290 selfloop transitions, 47 changer transitions 0/394 dead transitions. [2024-06-28 03:12:41,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 394 transitions, 6063 flow [2024-06-28 03:12:41,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:12:41,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:12:41,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 187 transitions. [2024-06-28 03:12:41,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43488372093023253 [2024-06-28 03:12:41,440 INFO L175 Difference]: Start difference. First operand has 193 places, 358 transitions, 5167 flow. Second operand 10 states and 187 transitions. [2024-06-28 03:12:41,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 394 transitions, 6063 flow [2024-06-28 03:12:41,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 394 transitions, 6021 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-28 03:12:41,861 INFO L231 Difference]: Finished difference. Result has 199 places, 367 transitions, 5367 flow [2024-06-28 03:12:41,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5125, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5367, PETRI_PLACES=199, PETRI_TRANSITIONS=367} [2024-06-28 03:12:41,862 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 155 predicate places. [2024-06-28 03:12:41,862 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 367 transitions, 5367 flow [2024-06-28 03:12:41,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:12:41,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:12:41,862 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:12:41,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-28 03:12:41,862 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:12:41,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:12:41,863 INFO L85 PathProgramCache]: Analyzing trace with hash -2098945738, now seen corresponding path program 1 times [2024-06-28 03:12:41,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:12:41,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459897664] [2024-06-28 03:12:41,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:12:41,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:12:41,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:12:42,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:12:42,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:12:42,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459897664] [2024-06-28 03:12:42,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459897664] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:12:42,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:12:42,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:12:42,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423761414] [2024-06-28 03:12:42,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:12:42,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:12:42,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:12:42,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:12:42,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:12:42,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-28 03:12:42,685 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 367 transitions, 5367 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:12:42,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:12:42,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-28 03:12:42,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:12:43,816 INFO L124 PetriNetUnfolderBase]: 3289/4885 cut-off events. [2024-06-28 03:12:43,816 INFO L125 PetriNetUnfolderBase]: For 294778/294780 co-relation queries the response was YES. [2024-06-28 03:12:43,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43996 conditions, 4885 events. 3289/4885 cut-off events. For 294778/294780 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 24468 event pairs, 741 based on Foata normal form. 8/4890 useless extension candidates. Maximal degree in co-relation 43908. Up to 4490 conditions per place. [2024-06-28 03:12:43,870 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 333 selfloop transitions, 79 changer transitions 0/416 dead transitions. [2024-06-28 03:12:43,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 416 transitions, 6865 flow [2024-06-28 03:12:43,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:12:43,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:12:43,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-28 03:12:43,871 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4625322997416021 [2024-06-28 03:12:43,872 INFO L175 Difference]: Start difference. First operand has 199 places, 367 transitions, 5367 flow. Second operand 9 states and 179 transitions. [2024-06-28 03:12:43,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 416 transitions, 6865 flow [2024-06-28 03:12:44,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 416 transitions, 6747 flow, removed 47 selfloop flow, removed 3 redundant places. [2024-06-28 03:12:44,306 INFO L231 Difference]: Finished difference. Result has 207 places, 378 transitions, 5697 flow [2024-06-28 03:12:44,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5249, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5697, PETRI_PLACES=207, PETRI_TRANSITIONS=378} [2024-06-28 03:12:44,306 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 163 predicate places. [2024-06-28 03:12:44,307 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 378 transitions, 5697 flow [2024-06-28 03:12:44,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:12:44,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:12:44,307 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:12:44,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-28 03:12:44,307 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:12:44,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:12:44,308 INFO L85 PathProgramCache]: Analyzing trace with hash -612769930, now seen corresponding path program 2 times [2024-06-28 03:12:44,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:12:44,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685168112] [2024-06-28 03:12:44,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:12:44,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:12:44,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:12:45,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:12:45,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:12:45,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685168112] [2024-06-28 03:12:45,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685168112] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:12:45,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:12:45,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:12:45,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441808387] [2024-06-28 03:12:45,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:12:45,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:12:45,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:12:45,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:12:45,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:12:45,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-28 03:12:45,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 378 transitions, 5697 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:12:45,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:12:45,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-28 03:12:45,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:12:46,430 INFO L124 PetriNetUnfolderBase]: 3481/5166 cut-off events. [2024-06-28 03:12:46,431 INFO L125 PetriNetUnfolderBase]: For 333667/333669 co-relation queries the response was YES. [2024-06-28 03:12:46,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48586 conditions, 5166 events. 3481/5166 cut-off events. For 333667/333669 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 26095 event pairs, 733 based on Foata normal form. 8/5169 useless extension candidates. Maximal degree in co-relation 48494. Up to 4541 conditions per place. [2024-06-28 03:12:46,489 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 325 selfloop transitions, 107 changer transitions 0/436 dead transitions. [2024-06-28 03:12:46,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 436 transitions, 7739 flow [2024-06-28 03:12:46,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:12:46,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:12:46,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 194 transitions. [2024-06-28 03:12:46,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4511627906976744 [2024-06-28 03:12:46,491 INFO L175 Difference]: Start difference. First operand has 207 places, 378 transitions, 5697 flow. Second operand 10 states and 194 transitions. [2024-06-28 03:12:46,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 436 transitions, 7739 flow [2024-06-28 03:12:47,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 436 transitions, 7401 flow, removed 136 selfloop flow, removed 4 redundant places. [2024-06-28 03:12:47,009 INFO L231 Difference]: Finished difference. Result has 215 places, 401 transitions, 6269 flow [2024-06-28 03:12:47,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5497, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6269, PETRI_PLACES=215, PETRI_TRANSITIONS=401} [2024-06-28 03:12:47,009 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 171 predicate places. [2024-06-28 03:12:47,010 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 401 transitions, 6269 flow [2024-06-28 03:12:47,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:12:47,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:12:47,010 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:12:47,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-28 03:12:47,010 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:12:47,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:12:47,011 INFO L85 PathProgramCache]: Analyzing trace with hash -2094297350, now seen corresponding path program 1 times [2024-06-28 03:12:47,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:12:47,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555948726] [2024-06-28 03:12:47,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:12:47,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:12:47,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:12:47,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:12:47,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:12:47,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555948726] [2024-06-28 03:12:47,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555948726] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:12:47,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:12:47,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:12:47,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211256485] [2024-06-28 03:12:47,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:12:47,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:12:47,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:12:47,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:12:47,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:12:47,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-28 03:12:47,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 401 transitions, 6269 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:12:47,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:12:47,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-28 03:12:47,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:12:49,031 INFO L124 PetriNetUnfolderBase]: 3499/5196 cut-off events. [2024-06-28 03:12:49,031 INFO L125 PetriNetUnfolderBase]: For 348875/348877 co-relation queries the response was YES. [2024-06-28 03:12:49,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49599 conditions, 5196 events. 3499/5196 cut-off events. For 348875/348877 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 26300 event pairs, 770 based on Foata normal form. 5/5199 useless extension candidates. Maximal degree in co-relation 49503. Up to 4764 conditions per place. [2024-06-28 03:12:49,094 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 315 selfloop transitions, 119 changer transitions 0/438 dead transitions. [2024-06-28 03:12:49,095 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 438 transitions, 7621 flow [2024-06-28 03:12:49,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:12:49,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:12:49,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-28 03:12:49,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470284237726098 [2024-06-28 03:12:49,112 INFO L175 Difference]: Start difference. First operand has 215 places, 401 transitions, 6269 flow. Second operand 9 states and 173 transitions. [2024-06-28 03:12:49,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 438 transitions, 7621 flow [2024-06-28 03:12:49,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 438 transitions, 7467 flow, removed 67 selfloop flow, removed 3 redundant places. [2024-06-28 03:12:49,735 INFO L231 Difference]: Finished difference. Result has 221 places, 405 transitions, 6493 flow [2024-06-28 03:12:49,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6115, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6493, PETRI_PLACES=221, PETRI_TRANSITIONS=405} [2024-06-28 03:12:49,735 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 177 predicate places. [2024-06-28 03:12:49,736 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 405 transitions, 6493 flow [2024-06-28 03:12:49,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:12:49,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:12:49,736 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:12:49,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-28 03:12:49,736 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:12:49,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:12:49,737 INFO L85 PathProgramCache]: Analyzing trace with hash 918315178, now seen corresponding path program 3 times [2024-06-28 03:12:49,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:12:49,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666402851] [2024-06-28 03:12:49,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:12:49,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:12:49,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:12:50,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:12:50,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:12:50,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666402851] [2024-06-28 03:12:50,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666402851] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:12:50,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:12:50,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:12:50,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859781110] [2024-06-28 03:12:50,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:12:50,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:12:50,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:12:50,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:12:50,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:12:50,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-28 03:12:50,599 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 405 transitions, 6493 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:12:50,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:12:50,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-28 03:12:50,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:12:51,764 INFO L124 PetriNetUnfolderBase]: 3487/5179 cut-off events. [2024-06-28 03:12:51,764 INFO L125 PetriNetUnfolderBase]: For 359576/359578 co-relation queries the response was YES. [2024-06-28 03:12:51,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50054 conditions, 5179 events. 3487/5179 cut-off events. For 359576/359578 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 26166 event pairs, 722 based on Foata normal form. 8/5182 useless extension candidates. Maximal degree in co-relation 49956. Up to 4561 conditions per place. [2024-06-28 03:12:51,821 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 336 selfloop transitions, 99 changer transitions 0/439 dead transitions. [2024-06-28 03:12:51,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 439 transitions, 7899 flow [2024-06-28 03:12:51,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:12:51,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:12:51,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-28 03:12:51,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44883720930232557 [2024-06-28 03:12:51,823 INFO L175 Difference]: Start difference. First operand has 221 places, 405 transitions, 6493 flow. Second operand 10 states and 193 transitions. [2024-06-28 03:12:51,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 439 transitions, 7899 flow [2024-06-28 03:12:52,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 439 transitions, 7487 flow, removed 92 selfloop flow, removed 7 redundant places. [2024-06-28 03:12:52,414 INFO L231 Difference]: Finished difference. Result has 224 places, 405 transitions, 6290 flow [2024-06-28 03:12:52,415 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6081, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6290, PETRI_PLACES=224, PETRI_TRANSITIONS=405} [2024-06-28 03:12:52,416 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 180 predicate places. [2024-06-28 03:12:52,416 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 405 transitions, 6290 flow [2024-06-28 03:12:52,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:12:52,416 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:12:52,416 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:12:52,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-28 03:12:52,416 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:12:52,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:12:52,418 INFO L85 PathProgramCache]: Analyzing trace with hash 1091042466, now seen corresponding path program 2 times [2024-06-28 03:12:52,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:12:52,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926996884] [2024-06-28 03:12:52,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:12:52,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:12:52,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:12:53,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:12:53,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:12:53,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926996884] [2024-06-28 03:12:53,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926996884] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:12:53,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:12:53,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:12:53,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188351005] [2024-06-28 03:12:53,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:12:53,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:12:53,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:12:53,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:12:53,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:12:53,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-28 03:12:53,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 405 transitions, 6290 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:12:53,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:12:53,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-28 03:12:53,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:12:54,680 INFO L124 PetriNetUnfolderBase]: 3505/5205 cut-off events. [2024-06-28 03:12:54,681 INFO L125 PetriNetUnfolderBase]: For 373292/373292 co-relation queries the response was YES. [2024-06-28 03:12:54,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50355 conditions, 5205 events. 3505/5205 cut-off events. For 373292/373292 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 26386 event pairs, 762 based on Foata normal form. 3/5206 useless extension candidates. Maximal degree in co-relation 50256. Up to 4562 conditions per place. [2024-06-28 03:12:54,735 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 257 selfloop transitions, 178 changer transitions 0/439 dead transitions. [2024-06-28 03:12:54,735 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 439 transitions, 7570 flow [2024-06-28 03:12:54,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:12:54,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:12:54,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-28 03:12:54,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-28 03:12:54,736 INFO L175 Difference]: Start difference. First operand has 224 places, 405 transitions, 6290 flow. Second operand 9 states and 172 transitions. [2024-06-28 03:12:54,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 439 transitions, 7570 flow [2024-06-28 03:12:55,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 439 transitions, 7400 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-28 03:12:55,385 INFO L231 Difference]: Finished difference. Result has 227 places, 409 transitions, 6621 flow [2024-06-28 03:12:55,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6120, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6621, PETRI_PLACES=227, PETRI_TRANSITIONS=409} [2024-06-28 03:12:55,386 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 183 predicate places. [2024-06-28 03:12:55,386 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 409 transitions, 6621 flow [2024-06-28 03:12:55,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:12:55,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:12:55,387 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:12:55,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-28 03:12:55,387 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:12:55,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:12:55,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1091042218, now seen corresponding path program 4 times [2024-06-28 03:12:55,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:12:55,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146767843] [2024-06-28 03:12:55,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:12:55,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:12:55,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:12:56,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:12:56,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:12:56,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146767843] [2024-06-28 03:12:56,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146767843] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:12:56,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:12:56,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:12:56,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727818886] [2024-06-28 03:12:56,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:12:56,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:12:56,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:12:56,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:12:56,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:12:56,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-28 03:12:56,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 409 transitions, 6621 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:12:56,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:12:56,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-28 03:12:56,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:12:57,455 INFO L124 PetriNetUnfolderBase]: 3621/5372 cut-off events. [2024-06-28 03:12:57,455 INFO L125 PetriNetUnfolderBase]: For 406166/406168 co-relation queries the response was YES. [2024-06-28 03:12:57,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53435 conditions, 5372 events. 3621/5372 cut-off events. For 406166/406168 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 27287 event pairs, 702 based on Foata normal form. 8/5378 useless extension candidates. Maximal degree in co-relation 53335. Up to 4051 conditions per place. [2024-06-28 03:12:57,513 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 247 selfloop transitions, 205 changer transitions 0/456 dead transitions. [2024-06-28 03:12:57,513 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 456 transitions, 8361 flow [2024-06-28 03:12:57,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:12:57,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:12:57,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 180 transitions. [2024-06-28 03:12:57,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-28 03:12:57,517 INFO L175 Difference]: Start difference. First operand has 227 places, 409 transitions, 6621 flow. Second operand 9 states and 180 transitions. [2024-06-28 03:12:57,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 456 transitions, 8361 flow [2024-06-28 03:12:58,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 456 transitions, 7894 flow, removed 59 selfloop flow, removed 7 redundant places. [2024-06-28 03:12:58,213 INFO L231 Difference]: Finished difference. Result has 230 places, 421 transitions, 7071 flow [2024-06-28 03:12:58,213 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6154, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=409, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=197, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7071, PETRI_PLACES=230, PETRI_TRANSITIONS=421} [2024-06-28 03:12:58,215 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 186 predicate places. [2024-06-28 03:12:58,215 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 421 transitions, 7071 flow [2024-06-28 03:12:58,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:12:58,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:12:58,216 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:12:58,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-28 03:12:58,216 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:12:58,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:12:58,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1090805068, now seen corresponding path program 5 times [2024-06-28 03:12:58,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:12:58,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81920061] [2024-06-28 03:12:58,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:12:58,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:12:58,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:12:59,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:12:59,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:12:59,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81920061] [2024-06-28 03:12:59,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81920061] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:12:59,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:12:59,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:12:59,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821118117] [2024-06-28 03:12:59,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:12:59,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:12:59,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:12:59,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:12:59,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:12:59,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-28 03:12:59,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 421 transitions, 7071 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:12:59,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:12:59,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-28 03:12:59,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:13:00,497 INFO L124 PetriNetUnfolderBase]: 3737/5549 cut-off events. [2024-06-28 03:13:00,497 INFO L125 PetriNetUnfolderBase]: For 444262/444264 co-relation queries the response was YES. [2024-06-28 03:13:00,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57116 conditions, 5549 events. 3737/5549 cut-off events. For 444262/444264 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 28471 event pairs, 748 based on Foata normal form. 8/5555 useless extension candidates. Maximal degree in co-relation 57014. Up to 4141 conditions per place. [2024-06-28 03:13:00,576 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 290 selfloop transitions, 176 changer transitions 0/470 dead transitions. [2024-06-28 03:13:00,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 470 transitions, 9057 flow [2024-06-28 03:13:00,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:13:00,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:13:00,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 182 transitions. [2024-06-28 03:13:00,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4702842377260982 [2024-06-28 03:13:00,578 INFO L175 Difference]: Start difference. First operand has 230 places, 421 transitions, 7071 flow. Second operand 9 states and 182 transitions. [2024-06-28 03:13:00,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 470 transitions, 9057 flow [2024-06-28 03:13:01,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 470 transitions, 8812 flow, removed 89 selfloop flow, removed 4 redundant places. [2024-06-28 03:13:01,459 INFO L231 Difference]: Finished difference. Result has 236 places, 432 transitions, 7542 flow [2024-06-28 03:13:01,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6848, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7542, PETRI_PLACES=236, PETRI_TRANSITIONS=432} [2024-06-28 03:13:01,460 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 192 predicate places. [2024-06-28 03:13:01,460 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 432 transitions, 7542 flow [2024-06-28 03:13:01,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:13:01,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:13:01,460 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:13:01,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-28 03:13:01,461 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:13:01,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:13:01,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1090811578, now seen corresponding path program 6 times [2024-06-28 03:13:01,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:13:01,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171505073] [2024-06-28 03:13:01,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:13:01,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:13:01,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:13:02,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:13:02,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:13:02,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171505073] [2024-06-28 03:13:02,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171505073] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:13:02,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:13:02,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:13:02,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29813114] [2024-06-28 03:13:02,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:13:02,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:13:02,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:13:02,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:13:02,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:13:02,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-28 03:13:02,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 432 transitions, 7542 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:13:02,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:13:02,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-28 03:13:02,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:13:03,579 INFO L124 PetriNetUnfolderBase]: 3725/5533 cut-off events. [2024-06-28 03:13:03,580 INFO L125 PetriNetUnfolderBase]: For 444193/444195 co-relation queries the response was YES. [2024-06-28 03:13:03,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56538 conditions, 5533 events. 3725/5533 cut-off events. For 444193/444195 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 28389 event pairs, 746 based on Foata normal form. 8/5539 useless extension candidates. Maximal degree in co-relation 56433. Up to 4135 conditions per place. [2024-06-28 03:13:03,648 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 288 selfloop transitions, 177 changer transitions 0/469 dead transitions. [2024-06-28 03:13:03,648 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 469 transitions, 9041 flow [2024-06-28 03:13:03,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:13:03,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:13:03,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 182 transitions. [2024-06-28 03:13:03,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4702842377260982 [2024-06-28 03:13:03,649 INFO L175 Difference]: Start difference. First operand has 236 places, 432 transitions, 7542 flow. Second operand 9 states and 182 transitions. [2024-06-28 03:13:03,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 469 transitions, 9041 flow [2024-06-28 03:13:04,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 469 transitions, 8675 flow, removed 76 selfloop flow, removed 5 redundant places. [2024-06-28 03:13:04,687 INFO L231 Difference]: Finished difference. Result has 240 places, 433 transitions, 7616 flow [2024-06-28 03:13:04,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7176, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=176, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7616, PETRI_PLACES=240, PETRI_TRANSITIONS=433} [2024-06-28 03:13:04,688 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 196 predicate places. [2024-06-28 03:13:04,688 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 433 transitions, 7616 flow [2024-06-28 03:13:04,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:13:04,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:13:04,689 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:13:04,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-28 03:13:04,692 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:13:04,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:13:04,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1090811826, now seen corresponding path program 3 times [2024-06-28 03:13:04,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:13:04,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630826260] [2024-06-28 03:13:04,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:13:04,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:13:04,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:13:05,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:13:05,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:13:05,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630826260] [2024-06-28 03:13:05,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630826260] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:13:05,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:13:05,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:13:05,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863053771] [2024-06-28 03:13:05,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:13:05,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:13:05,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:13:05,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:13:05,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:13:05,631 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-28 03:13:05,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 433 transitions, 7616 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:13:05,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:13:05,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-28 03:13:05,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:13:06,981 INFO L124 PetriNetUnfolderBase]: 3743/5559 cut-off events. [2024-06-28 03:13:06,981 INFO L125 PetriNetUnfolderBase]: For 459306/459306 co-relation queries the response was YES. [2024-06-28 03:13:07,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56886 conditions, 5559 events. 3743/5559 cut-off events. For 459306/459306 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 28542 event pairs, 796 based on Foata normal form. 3/5560 useless extension candidates. Maximal degree in co-relation 56780. Up to 4900 conditions per place. [2024-06-28 03:13:07,064 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 310 selfloop transitions, 154 changer transitions 0/468 dead transitions. [2024-06-28 03:13:07,064 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 468 transitions, 9072 flow [2024-06-28 03:13:07,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:13:07,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:13:07,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-28 03:13:07,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470284237726098 [2024-06-28 03:13:07,066 INFO L175 Difference]: Start difference. First operand has 240 places, 433 transitions, 7616 flow. Second operand 9 states and 173 transitions. [2024-06-28 03:13:07,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 468 transitions, 9072 flow [2024-06-28 03:13:08,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 468 transitions, 8757 flow, removed 57 selfloop flow, removed 5 redundant places. [2024-06-28 03:13:08,055 INFO L231 Difference]: Finished difference. Result has 244 places, 437 transitions, 7760 flow [2024-06-28 03:13:08,056 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7301, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7760, PETRI_PLACES=244, PETRI_TRANSITIONS=437} [2024-06-28 03:13:08,057 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 200 predicate places. [2024-06-28 03:13:08,057 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 437 transitions, 7760 flow [2024-06-28 03:13:08,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:13:08,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:13:08,057 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:13:08,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-28 03:13:08,057 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:13:08,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:13:08,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1091050836, now seen corresponding path program 4 times [2024-06-28 03:13:08,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:13:08,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832958110] [2024-06-28 03:13:08,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:13:08,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:13:08,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:13:09,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:13:09,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:13:09,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832958110] [2024-06-28 03:13:09,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832958110] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:13:09,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:13:09,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:13:09,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376753627] [2024-06-28 03:13:09,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:13:09,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:13:09,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:13:09,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:13:09,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:13:09,240 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-28 03:13:09,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 437 transitions, 7760 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:13:09,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:13:09,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-28 03:13:09,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:13:10,576 INFO L124 PetriNetUnfolderBase]: 3761/5585 cut-off events. [2024-06-28 03:13:10,577 INFO L125 PetriNetUnfolderBase]: For 477435/477435 co-relation queries the response was YES. [2024-06-28 03:13:10,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57600 conditions, 5585 events. 3761/5585 cut-off events. For 477435/477435 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 28655 event pairs, 796 based on Foata normal form. 3/5586 useless extension candidates. Maximal degree in co-relation 57493. Up to 4812 conditions per place. [2024-06-28 03:13:10,650 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 277 selfloop transitions, 194 changer transitions 0/475 dead transitions. [2024-06-28 03:13:10,651 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 475 transitions, 9162 flow [2024-06-28 03:13:10,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:13:10,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:13:10,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-28 03:13:10,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-28 03:13:10,652 INFO L175 Difference]: Start difference. First operand has 244 places, 437 transitions, 7760 flow. Second operand 10 states and 190 transitions. [2024-06-28 03:13:10,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 475 transitions, 9162 flow [2024-06-28 03:13:11,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 475 transitions, 8737 flow, removed 62 selfloop flow, removed 7 redundant places. [2024-06-28 03:13:11,603 INFO L231 Difference]: Finished difference. Result has 247 places, 441 transitions, 7887 flow [2024-06-28 03:13:11,603 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7335, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=190, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7887, PETRI_PLACES=247, PETRI_TRANSITIONS=441} [2024-06-28 03:13:11,604 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 203 predicate places. [2024-06-28 03:13:11,604 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 441 transitions, 7887 flow [2024-06-28 03:13:11,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:13:11,604 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:13:11,604 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:13:11,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-28 03:13:11,605 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:13:11,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:13:11,605 INFO L85 PathProgramCache]: Analyzing trace with hash 1091051146, now seen corresponding path program 1 times [2024-06-28 03:13:11,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:13:11,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087330348] [2024-06-28 03:13:11,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:13:11,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:13:11,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:13:12,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:13:12,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:13:12,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087330348] [2024-06-28 03:13:12,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087330348] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:13:12,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:13:12,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:13:12,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997654933] [2024-06-28 03:13:12,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:13:12,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:13:12,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:13:12,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:13:12,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:13:12,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-28 03:13:12,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 441 transitions, 7887 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:13:12,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:13:12,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-28 03:13:12,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:13:14,058 INFO L124 PetriNetUnfolderBase]: 3659/5496 cut-off events. [2024-06-28 03:13:14,058 INFO L125 PetriNetUnfolderBase]: For 500394/500403 co-relation queries the response was YES. [2024-06-28 03:13:14,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57304 conditions, 5496 events. 3659/5496 cut-off events. For 500394/500403 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 28870 event pairs, 836 based on Foata normal form. 9/5497 useless extension candidates. Maximal degree in co-relation 57196. Up to 4886 conditions per place. [2024-06-28 03:13:14,130 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 357 selfloop transitions, 61 changer transitions 0/475 dead transitions. [2024-06-28 03:13:14,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 475 transitions, 9157 flow [2024-06-28 03:13:14,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:13:14,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:13:14,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-28 03:13:14,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573643410852713 [2024-06-28 03:13:14,132 INFO L175 Difference]: Start difference. First operand has 247 places, 441 transitions, 7887 flow. Second operand 9 states and 177 transitions. [2024-06-28 03:13:14,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 475 transitions, 9157 flow [2024-06-28 03:13:15,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 475 transitions, 8657 flow, removed 62 selfloop flow, removed 8 redundant places. [2024-06-28 03:13:15,110 INFO L231 Difference]: Finished difference. Result has 248 places, 444 transitions, 7647 flow [2024-06-28 03:13:15,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7387, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7647, PETRI_PLACES=248, PETRI_TRANSITIONS=444} [2024-06-28 03:13:15,111 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 204 predicate places. [2024-06-28 03:13:15,111 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 444 transitions, 7647 flow [2024-06-28 03:13:15,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:13:15,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:13:15,111 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:13:15,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-28 03:13:15,112 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)] === [2024-06-28 03:13:15,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:13:15,112 INFO L85 PathProgramCache]: Analyzing trace with hash 2065366424, now seen corresponding path program 1 times [2024-06-28 03:13:15,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:13:15,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376378809] [2024-06-28 03:13:15,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:13:15,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:13:15,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:13:15,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:13:15,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:13:15,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376378809] [2024-06-28 03:13:15,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376378809] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:13:15,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:13:15,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 03:13:15,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907529324] [2024-06-28 03:13:15,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:13:15,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 03:13:15,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:13:15,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 03:13:15,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-28 03:13:15,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-28 03:13:15,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 444 transitions, 7647 flow. Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:13:15,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:13:15,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-28 03:13:15,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:13:17,039 INFO L124 PetriNetUnfolderBase]: 3658/5495 cut-off events. [2024-06-28 03:13:17,039 INFO L125 PetriNetUnfolderBase]: For 506833/506842 co-relation queries the response was YES. [2024-06-28 03:13:17,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57110 conditions, 5495 events. 3658/5495 cut-off events. For 506833/506842 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 28910 event pairs, 842 based on Foata normal form. 6/5493 useless extension candidates. Maximal degree in co-relation 57001. Up to 5030 conditions per place. [2024-06-28 03:13:17,108 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 374 selfloop transitions, 30 changer transitions 0/461 dead transitions. [2024-06-28 03:13:17,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 461 transitions, 8681 flow [2024-06-28 03:13:17,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 03:13:17,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 03:13:17,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 116 transitions. [2024-06-28 03:13:17,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4496124031007752 [2024-06-28 03:13:17,109 INFO L175 Difference]: Start difference. First operand has 248 places, 444 transitions, 7647 flow. Second operand 6 states and 116 transitions. [2024-06-28 03:13:17,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 461 transitions, 8681 flow [2024-06-28 03:13:18,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 461 transitions, 8489 flow, removed 59 selfloop flow, removed 5 redundant places. [2024-06-28 03:13:18,188 INFO L231 Difference]: Finished difference. Result has 249 places, 447 transitions, 7607 flow [2024-06-28 03:13:18,189 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7457, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=444, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=417, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7607, PETRI_PLACES=249, PETRI_TRANSITIONS=447} [2024-06-28 03:13:18,189 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 205 predicate places. [2024-06-28 03:13:18,189 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 447 transitions, 7607 flow [2024-06-28 03:13:18,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:13:18,189 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:13:18,189 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:13:18,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-28 03:13:18,190 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:13:18,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:13:18,190 INFO L85 PathProgramCache]: Analyzing trace with hash 1989753298, now seen corresponding path program 2 times [2024-06-28 03:13:18,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:13:18,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740135892] [2024-06-28 03:13:18,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:13:18,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:13:18,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:13:19,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:13:19,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:13:19,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740135892] [2024-06-28 03:13:19,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740135892] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:13:19,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:13:19,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:13:19,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442593318] [2024-06-28 03:13:19,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:13:19,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:13:19,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:13:19,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:13:19,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:13:19,422 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-28 03:13:19,422 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 447 transitions, 7607 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:13:19,422 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:13:19,422 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-28 03:13:19,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:13:20,682 INFO L124 PetriNetUnfolderBase]: 3669/5526 cut-off events. [2024-06-28 03:13:20,683 INFO L125 PetriNetUnfolderBase]: For 527734/527738 co-relation queries the response was YES. [2024-06-28 03:13:20,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57372 conditions, 5526 events. 3669/5526 cut-off events. For 527734/527738 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 29177 event pairs, 776 based on Foata normal form. 10/5530 useless extension candidates. Maximal degree in co-relation 57262. Up to 4844 conditions per place. [2024-06-28 03:13:20,751 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 339 selfloop transitions, 83 changer transitions 0/479 dead transitions. [2024-06-28 03:13:20,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 479 transitions, 8893 flow [2024-06-28 03:13:20,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:13:20,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:13:20,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-28 03:13:20,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573643410852713 [2024-06-28 03:13:20,753 INFO L175 Difference]: Start difference. First operand has 249 places, 447 transitions, 7607 flow. Second operand 9 states and 177 transitions. [2024-06-28 03:13:20,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 479 transitions, 8893 flow [2024-06-28 03:13:21,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 479 transitions, 8763 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-28 03:13:21,823 INFO L231 Difference]: Finished difference. Result has 253 places, 450 transitions, 7787 flow [2024-06-28 03:13:21,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7477, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7787, PETRI_PLACES=253, PETRI_TRANSITIONS=450} [2024-06-28 03:13:21,823 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 209 predicate places. [2024-06-28 03:13:21,823 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 450 transitions, 7787 flow [2024-06-28 03:13:21,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:13:21,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:13:21,824 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:13:21,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-28 03:13:21,824 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:13:21,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:13:21,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1989752988, now seen corresponding path program 5 times [2024-06-28 03:13:21,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:13:21,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297767927] [2024-06-28 03:13:21,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:13:21,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:13:21,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:13:22,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:13:22,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:13:22,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297767927] [2024-06-28 03:13:22,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297767927] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:13:22,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:13:22,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:13:22,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734890997] [2024-06-28 03:13:22,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:13:22,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:13:22,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:13:22,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:13:22,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:13:22,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-28 03:13:22,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 450 transitions, 7787 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:13:22,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:13:22,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-28 03:13:22,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:13:24,097 INFO L124 PetriNetUnfolderBase]: 3858/5729 cut-off events. [2024-06-28 03:13:24,101 INFO L125 PetriNetUnfolderBase]: For 554276/554280 co-relation queries the response was YES. [2024-06-28 03:13:24,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60757 conditions, 5729 events. 3858/5729 cut-off events. For 554276/554280 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 29561 event pairs, 753 based on Foata normal form. 7/5732 useless extension candidates. Maximal degree in co-relation 60646. Up to 4910 conditions per place. [2024-06-28 03:13:24,170 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 266 selfloop transitions, 218 changer transitions 0/488 dead transitions. [2024-06-28 03:13:24,170 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 488 transitions, 9587 flow [2024-06-28 03:13:24,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:13:24,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:13:24,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-28 03:13:24,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45478036175710596 [2024-06-28 03:13:24,171 INFO L175 Difference]: Start difference. First operand has 253 places, 450 transitions, 7787 flow. Second operand 9 states and 176 transitions. [2024-06-28 03:13:24,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 488 transitions, 9587 flow [2024-06-28 03:13:25,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 488 transitions, 9301 flow, removed 62 selfloop flow, removed 7 redundant places. [2024-06-28 03:13:25,329 INFO L231 Difference]: Finished difference. Result has 255 places, 458 transitions, 8266 flow [2024-06-28 03:13:25,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7501, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=214, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8266, PETRI_PLACES=255, PETRI_TRANSITIONS=458} [2024-06-28 03:13:25,329 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 211 predicate places. [2024-06-28 03:13:25,330 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 458 transitions, 8266 flow [2024-06-28 03:13:25,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:13:25,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:13:25,330 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:13:25,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-28 03:13:25,330 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:13:25,331 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:13:25,331 INFO L85 PathProgramCache]: Analyzing trace with hash 1999872318, now seen corresponding path program 6 times [2024-06-28 03:13:25,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:13:25,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837775778] [2024-06-28 03:13:25,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:13:25,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:13:25,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:13:26,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:13:26,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:13:26,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837775778] [2024-06-28 03:13:26,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837775778] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:13:26,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:13:26,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:13:26,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752133359] [2024-06-28 03:13:26,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:13:26,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:13:26,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:13:26,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:13:26,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:13:26,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-28 03:13:26,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 458 transitions, 8266 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:13:26,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:13:26,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-28 03:13:26,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:13:27,919 INFO L124 PetriNetUnfolderBase]: 3878/5758 cut-off events. [2024-06-28 03:13:27,920 INFO L125 PetriNetUnfolderBase]: For 578859/578863 co-relation queries the response was YES. [2024-06-28 03:13:27,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62080 conditions, 5758 events. 3878/5758 cut-off events. For 578859/578863 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 29737 event pairs, 753 based on Foata normal form. 10/5764 useless extension candidates. Maximal degree in co-relation 61968. Up to 4717 conditions per place. [2024-06-28 03:13:27,994 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 243 selfloop transitions, 257 changer transitions 0/504 dead transitions. [2024-06-28 03:13:27,994 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 504 transitions, 10154 flow [2024-06-28 03:13:27,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 03:13:27,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 03:13:27,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 210 transitions. [2024-06-28 03:13:27,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4439746300211416 [2024-06-28 03:13:27,995 INFO L175 Difference]: Start difference. First operand has 255 places, 458 transitions, 8266 flow. Second operand 11 states and 210 transitions. [2024-06-28 03:13:27,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 504 transitions, 10154 flow [2024-06-28 03:13:29,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 504 transitions, 9584 flow, removed 145 selfloop flow, removed 5 redundant places. [2024-06-28 03:13:29,099 INFO L231 Difference]: Finished difference. Result has 261 places, 466 transitions, 8565 flow [2024-06-28 03:13:29,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7696, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=458, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=253, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8565, PETRI_PLACES=261, PETRI_TRANSITIONS=466} [2024-06-28 03:13:29,100 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 217 predicate places. [2024-06-28 03:13:29,100 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 466 transitions, 8565 flow [2024-06-28 03:13:29,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:13:29,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:13:29,100 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:13:29,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-28 03:13:29,101 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:13:29,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:13:29,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1999872628, now seen corresponding path program 3 times [2024-06-28 03:13:29,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:13:29,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919930985] [2024-06-28 03:13:29,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:13:29,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:13:29,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:13:30,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:13:30,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:13:30,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919930985] [2024-06-28 03:13:30,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919930985] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:13:30,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:13:30,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:13:30,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487831232] [2024-06-28 03:13:30,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:13:30,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:13:30,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:13:30,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:13:30,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:13:30,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-28 03:13:30,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 466 transitions, 8565 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:13:30,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:13:30,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-28 03:13:30,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:13:31,755 INFO L124 PetriNetUnfolderBase]: 3763/5658 cut-off events. [2024-06-28 03:13:31,755 INFO L125 PetriNetUnfolderBase]: For 594509/594513 co-relation queries the response was YES. [2024-06-28 03:13:31,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62032 conditions, 5658 events. 3763/5658 cut-off events. For 594509/594513 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 29897 event pairs, 787 based on Foata normal form. 10/5662 useless extension candidates. Maximal degree in co-relation 61918. Up to 4862 conditions per place. [2024-06-28 03:13:31,825 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 339 selfloop transitions, 102 changer transitions 0/502 dead transitions. [2024-06-28 03:13:31,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 502 transitions, 9931 flow [2024-06-28 03:13:31,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:13:31,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:13:31,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-28 03:13:31,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4558139534883721 [2024-06-28 03:13:31,827 INFO L175 Difference]: Start difference. First operand has 261 places, 466 transitions, 8565 flow. Second operand 10 states and 196 transitions. [2024-06-28 03:13:31,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 502 transitions, 9931 flow [2024-06-28 03:13:32,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 502 transitions, 9430 flow, removed 102 selfloop flow, removed 8 redundant places. [2024-06-28 03:13:32,909 INFO L231 Difference]: Finished difference. Result has 263 places, 469 transitions, 8434 flow [2024-06-28 03:13:32,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8072, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8434, PETRI_PLACES=263, PETRI_TRANSITIONS=469} [2024-06-28 03:13:32,910 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 219 predicate places. [2024-06-28 03:13:32,910 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 469 transitions, 8434 flow [2024-06-28 03:13:32,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:13:32,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:13:32,910 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:13:32,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-28 03:13:32,911 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:13:32,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:13:32,911 INFO L85 PathProgramCache]: Analyzing trace with hash 2000228818, now seen corresponding path program 4 times [2024-06-28 03:13:32,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:13:32,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304445795] [2024-06-28 03:13:32,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:13:32,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:13:32,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:13:33,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:13:33,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:13:33,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304445795] [2024-06-28 03:13:33,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304445795] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:13:33,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:13:33,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:13:33,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532891649] [2024-06-28 03:13:33,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:13:33,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:13:33,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:13:33,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:13:33,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:13:33,956 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-28 03:13:33,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 469 transitions, 8434 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:13:33,957 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:13:33,957 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-28 03:13:33,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:13:35,318 INFO L124 PetriNetUnfolderBase]: 3800/5722 cut-off events. [2024-06-28 03:13:35,318 INFO L125 PetriNetUnfolderBase]: For 597152/597156 co-relation queries the response was YES. [2024-06-28 03:13:35,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62691 conditions, 5722 events. 3800/5722 cut-off events. For 597152/597156 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 30359 event pairs, 741 based on Foata normal form. 10/5726 useless extension candidates. Maximal degree in co-relation 62576. Up to 4801 conditions per place. [2024-06-28 03:13:35,396 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 334 selfloop transitions, 112 changer transitions 0/507 dead transitions. [2024-06-28 03:13:35,396 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 507 transitions, 10158 flow [2024-06-28 03:13:35,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:13:35,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:13:35,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 181 transitions. [2024-06-28 03:13:35,397 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46770025839793283 [2024-06-28 03:13:35,397 INFO L175 Difference]: Start difference. First operand has 263 places, 469 transitions, 8434 flow. Second operand 9 states and 181 transitions. [2024-06-28 03:13:35,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 507 transitions, 10158 flow [2024-06-28 03:13:36,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 507 transitions, 9834 flow, removed 64 selfloop flow, removed 8 redundant places. [2024-06-28 03:13:36,708 INFO L231 Difference]: Finished difference. Result has 264 places, 475 transitions, 8640 flow [2024-06-28 03:13:36,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8110, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=469, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8640, PETRI_PLACES=264, PETRI_TRANSITIONS=475} [2024-06-28 03:13:36,709 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 220 predicate places. [2024-06-28 03:13:36,709 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 475 transitions, 8640 flow [2024-06-28 03:13:36,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:13:36,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:13:36,709 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:13:36,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-28 03:13:36,710 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:13:36,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:13:36,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1704653118, now seen corresponding path program 7 times [2024-06-28 03:13:36,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:13:36,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034372712] [2024-06-28 03:13:36,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:13:36,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:13:36,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:13:37,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:13:37,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:13:37,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034372712] [2024-06-28 03:13:37,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034372712] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:13:37,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:13:37,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:13:37,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605741176] [2024-06-28 03:13:37,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:13:37,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:13:37,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:13:37,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:13:37,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:13:37,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-28 03:13:37,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 475 transitions, 8640 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:13:37,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:13:37,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-28 03:13:37,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:13:39,110 INFO L124 PetriNetUnfolderBase]: 3965/5891 cut-off events. [2024-06-28 03:13:39,111 INFO L125 PetriNetUnfolderBase]: For 615901/615905 co-relation queries the response was YES. [2024-06-28 03:13:39,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65091 conditions, 5891 events. 3965/5891 cut-off events. For 615901/615905 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 30546 event pairs, 762 based on Foata normal form. 7/5894 useless extension candidates. Maximal degree in co-relation 64975. Up to 5064 conditions per place. [2024-06-28 03:13:39,187 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 330 selfloop transitions, 176 changer transitions 0/510 dead transitions. [2024-06-28 03:13:39,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 510 transitions, 10450 flow [2024-06-28 03:13:39,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:13:39,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:13:39,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-28 03:13:39,188 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573643410852713 [2024-06-28 03:13:39,188 INFO L175 Difference]: Start difference. First operand has 264 places, 475 transitions, 8640 flow. Second operand 9 states and 177 transitions. [2024-06-28 03:13:39,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 510 transitions, 10450 flow [2024-06-28 03:13:40,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 510 transitions, 10160 flow, removed 82 selfloop flow, removed 5 redundant places. [2024-06-28 03:13:40,329 INFO L231 Difference]: Finished difference. Result has 268 places, 479 transitions, 8853 flow [2024-06-28 03:13:40,344 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8350, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=475, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8853, PETRI_PLACES=268, PETRI_TRANSITIONS=479} [2024-06-28 03:13:40,345 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 224 predicate places. [2024-06-28 03:13:40,345 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 479 transitions, 8853 flow [2024-06-28 03:13:40,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:13:40,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:13:40,345 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:13:40,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-28 03:13:40,346 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:13:40,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:13:40,346 INFO L85 PathProgramCache]: Analyzing trace with hash 1704407350, now seen corresponding path program 7 times [2024-06-28 03:13:40,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:13:40,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251503189] [2024-06-28 03:13:40,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:13:40,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:13:40,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:13:41,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:13:41,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:13:41,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251503189] [2024-06-28 03:13:41,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251503189] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:13:41,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:13:41,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:13:41,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705104715] [2024-06-28 03:13:41,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:13:41,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:13:41,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:13:41,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:13:41,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:13:41,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-28 03:13:41,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 479 transitions, 8853 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:13:41,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:13:41,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-28 03:13:41,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:13:42,578 INFO L124 PetriNetUnfolderBase]: 4033/6002 cut-off events. [2024-06-28 03:13:42,578 INFO L125 PetriNetUnfolderBase]: For 647166/647170 co-relation queries the response was YES. [2024-06-28 03:13:42,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66931 conditions, 6002 events. 4033/6002 cut-off events. For 647166/647170 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 31381 event pairs, 754 based on Foata normal form. 10/6007 useless extension candidates. Maximal degree in co-relation 66813. Up to 4316 conditions per place. [2024-06-28 03:13:42,654 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 327 selfloop transitions, 193 changer transitions 0/524 dead transitions. [2024-06-28 03:13:42,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 524 transitions, 11133 flow [2024-06-28 03:13:42,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:13:42,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:13:42,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-28 03:13:42,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4558139534883721 [2024-06-28 03:13:42,660 INFO L175 Difference]: Start difference. First operand has 268 places, 479 transitions, 8853 flow. Second operand 10 states and 196 transitions. [2024-06-28 03:13:42,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 524 transitions, 11133 flow [2024-06-28 03:13:43,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 524 transitions, 10618 flow, removed 63 selfloop flow, removed 7 redundant places. [2024-06-28 03:13:43,886 INFO L231 Difference]: Finished difference. Result has 272 places, 487 transitions, 9012 flow [2024-06-28 03:13:43,886 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8338, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=188, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9012, PETRI_PLACES=272, PETRI_TRANSITIONS=487} [2024-06-28 03:13:43,886 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 228 predicate places. [2024-06-28 03:13:43,887 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 487 transitions, 9012 flow [2024-06-28 03:13:43,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:13:43,887 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:13:43,887 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:13:43,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-28 03:13:43,887 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)] === [2024-06-28 03:13:43,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:13:43,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1704653428, now seen corresponding path program 5 times [2024-06-28 03:13:43,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:13:43,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817910890] [2024-06-28 03:13:43,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:13:43,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:13:43,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:13:44,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:13:44,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:13:44,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817910890] [2024-06-28 03:13:44,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817910890] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:13:44,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:13:44,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:13:44,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396566975] [2024-06-28 03:13:44,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:13:44,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:13:44,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:13:44,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:13:44,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:13:45,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-28 03:13:45,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 487 transitions, 9012 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:13:45,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:13:45,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-28 03:13:45,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:13:46,496 INFO L124 PetriNetUnfolderBase]: 3876/5836 cut-off events. [2024-06-28 03:13:46,496 INFO L125 PetriNetUnfolderBase]: For 658670/658674 co-relation queries the response was YES. [2024-06-28 03:13:46,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65656 conditions, 5836 events. 3876/5836 cut-off events. For 658670/658674 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 31087 event pairs, 800 based on Foata normal form. 10/5840 useless extension candidates. Maximal degree in co-relation 65536. Up to 5114 conditions per place. [2024-06-28 03:13:46,576 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 383 selfloop transitions, 72 changer transitions 0/517 dead transitions. [2024-06-28 03:13:46,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 517 transitions, 10374 flow [2024-06-28 03:13:46,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:13:46,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:13:46,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-28 03:13:46,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4599483204134367 [2024-06-28 03:13:46,577 INFO L175 Difference]: Start difference. First operand has 272 places, 487 transitions, 9012 flow. Second operand 9 states and 178 transitions. [2024-06-28 03:13:46,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 517 transitions, 10374 flow [2024-06-28 03:13:47,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 517 transitions, 9893 flow, removed 130 selfloop flow, removed 6 redundant places. [2024-06-28 03:13:47,713 INFO L231 Difference]: Finished difference. Result has 275 places, 487 transitions, 8683 flow [2024-06-28 03:13:47,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8531, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=487, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=415, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8683, PETRI_PLACES=275, PETRI_TRANSITIONS=487} [2024-06-28 03:13:47,713 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 231 predicate places. [2024-06-28 03:13:47,713 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 487 transitions, 8683 flow [2024-06-28 03:13:47,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:13:47,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:13:47,714 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:13:47,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-28 03:13:47,714 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:13:47,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:13:47,714 INFO L85 PathProgramCache]: Analyzing trace with hash 1989744370, now seen corresponding path program 8 times [2024-06-28 03:13:47,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:13:47,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857782513] [2024-06-28 03:13:47,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:13:47,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:13:47,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:13:48,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:13:48,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:13:48,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857782513] [2024-06-28 03:13:48,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857782513] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:13:48,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:13:48,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:13:48,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382952669] [2024-06-28 03:13:48,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:13:48,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:13:48,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:13:48,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:13:48,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:13:48,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-28 03:13:48,685 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 487 transitions, 8683 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:13:48,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:13:48,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-28 03:13:48,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:13:50,188 INFO L124 PetriNetUnfolderBase]: 4075/6071 cut-off events. [2024-06-28 03:13:50,188 INFO L125 PetriNetUnfolderBase]: For 680424/680428 co-relation queries the response was YES. [2024-06-28 03:13:50,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68022 conditions, 6071 events. 4075/6071 cut-off events. For 680424/680428 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 31825 event pairs, 702 based on Foata normal form. 10/6076 useless extension candidates. Maximal degree in co-relation 67900. Up to 4347 conditions per place. [2024-06-28 03:13:50,267 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 259 selfloop transitions, 265 changer transitions 0/528 dead transitions. [2024-06-28 03:13:50,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 528 transitions, 10617 flow [2024-06-28 03:13:50,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:13:50,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:13:50,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-28 03:13:50,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44883720930232557 [2024-06-28 03:13:50,269 INFO L175 Difference]: Start difference. First operand has 275 places, 487 transitions, 8683 flow. Second operand 10 states and 193 transitions. [2024-06-28 03:13:50,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 528 transitions, 10617 flow [2024-06-28 03:13:51,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 528 transitions, 10435 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-28 03:13:51,215 INFO L231 Difference]: Finished difference. Result has 277 places, 495 transitions, 9348 flow [2024-06-28 03:13:51,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8501, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=487, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=258, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9348, PETRI_PLACES=277, PETRI_TRANSITIONS=495} [2024-06-28 03:13:51,215 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 233 predicate places. [2024-06-28 03:13:51,216 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 495 transitions, 9348 flow [2024-06-28 03:13:51,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:13:51,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:13:51,216 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:13:51,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-28 03:13:51,216 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:13:51,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:13:51,217 INFO L85 PathProgramCache]: Analyzing trace with hash 1704644500, now seen corresponding path program 9 times [2024-06-28 03:13:51,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:13:51,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635432557] [2024-06-28 03:13:51,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:13:51,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:13:51,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:13:52,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:13:52,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:13:52,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635432557] [2024-06-28 03:13:52,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635432557] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:13:52,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:13:52,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:13:52,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023890329] [2024-06-28 03:13:52,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:13:52,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:13:52,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:13:52,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:13:52,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:13:52,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-28 03:13:52,134 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 495 transitions, 9348 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:13:52,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:13:52,135 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-28 03:13:52,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:13:53,517 INFO L124 PetriNetUnfolderBase]: 4111/6130 cut-off events. [2024-06-28 03:13:53,517 INFO L125 PetriNetUnfolderBase]: For 711128/711132 co-relation queries the response was YES. [2024-06-28 03:13:53,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69986 conditions, 6130 events. 4111/6130 cut-off events. For 711128/711132 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 32231 event pairs, 747 based on Foata normal form. 10/6135 useless extension candidates. Maximal degree in co-relation 69863. Up to 4377 conditions per place. [2024-06-28 03:13:53,606 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 327 selfloop transitions, 204 changer transitions 0/535 dead transitions. [2024-06-28 03:13:53,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 535 transitions, 11397 flow [2024-06-28 03:13:53,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:13:53,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:13:53,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 198 transitions. [2024-06-28 03:13:53,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4604651162790698 [2024-06-28 03:13:53,608 INFO L175 Difference]: Start difference. First operand has 277 places, 495 transitions, 9348 flow. Second operand 10 states and 198 transitions. [2024-06-28 03:13:53,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 535 transitions, 11397 flow [2024-06-28 03:13:55,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 535 transitions, 11185 flow, removed 73 selfloop flow, removed 5 redundant places. [2024-06-28 03:13:55,282 INFO L231 Difference]: Finished difference. Result has 282 places, 499 transitions, 9714 flow [2024-06-28 03:13:55,282 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9140, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=495, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=200, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9714, PETRI_PLACES=282, PETRI_TRANSITIONS=499} [2024-06-28 03:13:55,282 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 238 predicate places. [2024-06-28 03:13:55,282 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 499 transitions, 9714 flow [2024-06-28 03:13:55,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:13:55,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:13:55,283 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:13:55,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-28 03:13:55,283 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:13:55,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:13:55,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1704644748, now seen corresponding path program 8 times [2024-06-28 03:13:55,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:13:55,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849523267] [2024-06-28 03:13:55,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:13:55,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:13:55,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:13:56,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:13:56,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:13:56,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849523267] [2024-06-28 03:13:56,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849523267] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:13:56,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:13:56,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:13:56,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581458524] [2024-06-28 03:13:56,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:13:56,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:13:56,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:13:56,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:13:56,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:13:56,302 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-28 03:13:56,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 499 transitions, 9714 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:13:56,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:13:56,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-28 03:13:56,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:13:57,738 INFO L124 PetriNetUnfolderBase]: 4129/6149 cut-off events. [2024-06-28 03:13:57,738 INFO L125 PetriNetUnfolderBase]: For 727366/727370 co-relation queries the response was YES. [2024-06-28 03:13:57,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71375 conditions, 6149 events. 4129/6149 cut-off events. For 727366/727370 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 32253 event pairs, 770 based on Foata normal form. 7/6152 useless extension candidates. Maximal degree in co-relation 71250. Up to 5336 conditions per place. [2024-06-28 03:13:57,824 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 359 selfloop transitions, 169 changer transitions 0/532 dead transitions. [2024-06-28 03:13:57,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 532 transitions, 11380 flow [2024-06-28 03:13:57,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:13:57,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:13:57,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-28 03:13:57,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4496124031007752 [2024-06-28 03:13:57,825 INFO L175 Difference]: Start difference. First operand has 282 places, 499 transitions, 9714 flow. Second operand 9 states and 174 transitions. [2024-06-28 03:13:57,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 532 transitions, 11380 flow [2024-06-28 03:13:59,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 532 transitions, 10734 flow, removed 73 selfloop flow, removed 7 redundant places. [2024-06-28 03:13:59,274 INFO L231 Difference]: Finished difference. Result has 284 places, 503 transitions, 9565 flow [2024-06-28 03:13:59,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9068, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9565, PETRI_PLACES=284, PETRI_TRANSITIONS=503} [2024-06-28 03:13:59,275 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 240 predicate places. [2024-06-28 03:13:59,275 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 503 transitions, 9565 flow [2024-06-28 03:13:59,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:13:59,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:13:59,275 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:13:59,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-28 03:13:59,276 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:13:59,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:13:59,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1704413860, now seen corresponding path program 10 times [2024-06-28 03:13:59,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:13:59,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268060887] [2024-06-28 03:13:59,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:13:59,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:13:59,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:14:00,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:14:00,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:14:00,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268060887] [2024-06-28 03:14:00,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268060887] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:14:00,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:14:00,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:14:00,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439535550] [2024-06-28 03:14:00,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:14:00,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:14:00,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:14:00,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:14:00,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:14:00,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-28 03:14:00,257 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 503 transitions, 9565 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:14:00,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:14:00,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-28 03:14:00,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:14:01,599 INFO L124 PetriNetUnfolderBase]: 4117/6138 cut-off events. [2024-06-28 03:14:01,599 INFO L125 PetriNetUnfolderBase]: For 734777/734781 co-relation queries the response was YES. [2024-06-28 03:14:01,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70336 conditions, 6138 events. 4117/6138 cut-off events. For 734777/734781 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 32291 event pairs, 747 based on Foata normal form. 10/6143 useless extension candidates. Maximal degree in co-relation 70210. Up to 4397 conditions per place. [2024-06-28 03:14:01,686 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 332 selfloop transitions, 202 changer transitions 0/538 dead transitions. [2024-06-28 03:14:01,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 538 transitions, 11365 flow [2024-06-28 03:14:01,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:14:01,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:14:01,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-28 03:14:01,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4558139534883721 [2024-06-28 03:14:01,688 INFO L175 Difference]: Start difference. First operand has 284 places, 503 transitions, 9565 flow. Second operand 10 states and 196 transitions. [2024-06-28 03:14:01,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 538 transitions, 11365 flow [2024-06-28 03:14:03,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 538 transitions, 10800 flow, removed 116 selfloop flow, removed 7 redundant places. [2024-06-28 03:14:03,013 INFO L231 Difference]: Finished difference. Result has 287 places, 503 transitions, 9413 flow [2024-06-28 03:14:03,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9000, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=503, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=202, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9413, PETRI_PLACES=287, PETRI_TRANSITIONS=503} [2024-06-28 03:14:03,014 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 243 predicate places. [2024-06-28 03:14:03,014 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 503 transitions, 9413 flow [2024-06-28 03:14:03,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:14:03,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:14:03,014 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:14:03,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-28 03:14:03,014 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:14:03,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:14:03,015 INFO L85 PathProgramCache]: Analyzing trace with hash 1704414108, now seen corresponding path program 9 times [2024-06-28 03:14:03,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:14:03,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106265412] [2024-06-28 03:14:03,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:14:03,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:14:03,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:14:03,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:14:03,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:14:03,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106265412] [2024-06-28 03:14:03,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106265412] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:14:03,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:14:03,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:14:03,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323032517] [2024-06-28 03:14:03,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:14:03,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:14:03,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:14:03,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:14:03,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:14:03,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-28 03:14:03,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 503 transitions, 9413 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:14:03,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:14:03,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-28 03:14:03,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:14:05,339 INFO L124 PetriNetUnfolderBase]: 4111/6126 cut-off events. [2024-06-28 03:14:05,340 INFO L125 PetriNetUnfolderBase]: For 739203/739207 co-relation queries the response was YES. [2024-06-28 03:14:05,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70314 conditions, 6126 events. 4111/6126 cut-off events. For 739203/739207 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 32166 event pairs, 767 based on Foata normal form. 7/6129 useless extension candidates. Maximal degree in co-relation 70187. Up to 5312 conditions per place. [2024-06-28 03:14:05,422 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 361 selfloop transitions, 168 changer transitions 0/533 dead transitions. [2024-06-28 03:14:05,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 533 transitions, 11077 flow [2024-06-28 03:14:05,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:14:05,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:14:05,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-28 03:14:05,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4496124031007752 [2024-06-28 03:14:05,423 INFO L175 Difference]: Start difference. First operand has 287 places, 503 transitions, 9413 flow. Second operand 9 states and 174 transitions. [2024-06-28 03:14:05,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 533 transitions, 11077 flow [2024-06-28 03:14:06,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 533 transitions, 10540 flow, removed 72 selfloop flow, removed 8 redundant places. [2024-06-28 03:14:06,801 INFO L231 Difference]: Finished difference. Result has 288 places, 503 transitions, 9221 flow [2024-06-28 03:14:06,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8876, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=503, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9221, PETRI_PLACES=288, PETRI_TRANSITIONS=503} [2024-06-28 03:14:06,803 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 244 predicate places. [2024-06-28 03:14:06,803 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 503 transitions, 9221 flow [2024-06-28 03:14:06,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:14:06,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:14:06,804 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:14:06,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-28 03:14:06,804 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:14:06,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:14:06,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1345089012, now seen corresponding path program 2 times [2024-06-28 03:14:06,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:14:06,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738530051] [2024-06-28 03:14:06,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:14:06,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:14:06,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:14:07,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:14:07,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:14:07,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738530051] [2024-06-28 03:14:07,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738530051] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:14:07,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:14:07,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 03:14:07,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373999924] [2024-06-28 03:14:07,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:14:07,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 03:14:07,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:14:07,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 03:14:07,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-28 03:14:07,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-28 03:14:07,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 503 transitions, 9221 flow. Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:14:07,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:14:07,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-28 03:14:07,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:14:09,020 INFO L124 PetriNetUnfolderBase]: 3954/5962 cut-off events. [2024-06-28 03:14:09,020 INFO L125 PetriNetUnfolderBase]: For 744500/744504 co-relation queries the response was YES. [2024-06-28 03:14:09,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68114 conditions, 5962 events. 3954/5962 cut-off events. For 744500/744504 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 31884 event pairs, 815 based on Foata normal form. 5/5961 useless extension candidates. Maximal degree in co-relation 67986. Up to 5439 conditions per place. [2024-06-28 03:14:09,093 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 419 selfloop transitions, 29 changer transitions 0/511 dead transitions. [2024-06-28 03:14:09,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 511 transitions, 10143 flow [2024-06-28 03:14:09,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 03:14:09,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 03:14:09,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 109 transitions. [2024-06-28 03:14:09,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42248062015503873 [2024-06-28 03:14:09,094 INFO L175 Difference]: Start difference. First operand has 288 places, 503 transitions, 9221 flow. Second operand 6 states and 109 transitions. [2024-06-28 03:14:09,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 511 transitions, 10143 flow [2024-06-28 03:14:10,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 511 transitions, 9772 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-28 03:14:10,449 INFO L231 Difference]: Finished difference. Result has 287 places, 503 transitions, 8914 flow [2024-06-28 03:14:10,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8850, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=503, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=474, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=8914, PETRI_PLACES=287, PETRI_TRANSITIONS=503} [2024-06-28 03:14:10,450 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 243 predicate places. [2024-06-28 03:14:10,450 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 503 transitions, 8914 flow [2024-06-28 03:14:10,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:14:10,450 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:14:10,450 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:14:10,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-28 03:14:10,451 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:14:10,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:14:10,451 INFO L85 PathProgramCache]: Analyzing trace with hash 1240357564, now seen corresponding path program 2 times [2024-06-28 03:14:10,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:14:10,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081927390] [2024-06-28 03:14:10,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:14:10,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:14:10,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:14:11,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:14:11,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:14:11,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081927390] [2024-06-28 03:14:11,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081927390] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:14:11,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:14:11,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:14:11,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641378876] [2024-06-28 03:14:11,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:14:11,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:14:11,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:14:11,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:14:11,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:14:11,396 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-28 03:14:11,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 503 transitions, 8914 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:14:11,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:14:11,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-28 03:14:11,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:14:12,933 INFO L124 PetriNetUnfolderBase]: 4028/6079 cut-off events. [2024-06-28 03:14:12,933 INFO L125 PetriNetUnfolderBase]: For 744534/744538 co-relation queries the response was YES. [2024-06-28 03:14:12,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68381 conditions, 6079 events. 4028/6079 cut-off events. For 744534/744538 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 32680 event pairs, 734 based on Foata normal form. 6/6083 useless extension candidates. Maximal degree in co-relation 68252. Up to 5295 conditions per place. [2024-06-28 03:14:13,020 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 397 selfloop transitions, 73 changer transitions 0/563 dead transitions. [2024-06-28 03:14:13,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 563 transitions, 10331 flow [2024-06-28 03:14:13,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:14:13,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:14:13,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 195 transitions. [2024-06-28 03:14:13,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45348837209302323 [2024-06-28 03:14:13,022 INFO L175 Difference]: Start difference. First operand has 287 places, 503 transitions, 8914 flow. Second operand 10 states and 195 transitions. [2024-06-28 03:14:13,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 563 transitions, 10331 flow [2024-06-28 03:14:14,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 563 transitions, 10255 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-28 03:14:14,476 INFO L231 Difference]: Finished difference. Result has 294 places, 529 transitions, 9398 flow [2024-06-28 03:14:14,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8838, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=503, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=446, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9398, PETRI_PLACES=294, PETRI_TRANSITIONS=529} [2024-06-28 03:14:14,477 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 250 predicate places. [2024-06-28 03:14:14,477 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 529 transitions, 9398 flow [2024-06-28 03:14:14,477 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) [2024-06-28 03:14:14,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:14:14,477 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:14:14,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-28 03:14:14,477 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)] === [2024-06-28 03:14:14,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:14:14,478 INFO L85 PathProgramCache]: Analyzing trace with hash -78143620, now seen corresponding path program 3 times [2024-06-28 03:14:14,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:14:14,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202174222] [2024-06-28 03:14:14,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:14:14,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:14:14,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:14:15,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:14:15,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:14:15,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202174222] [2024-06-28 03:14:15,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202174222] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:14:15,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:14:15,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:14:15,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150998237] [2024-06-28 03:14:15,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:14:15,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:14:15,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:14:15,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:14:15,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:14:15,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-28 03:14:15,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 529 transitions, 9398 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:14:15,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:14:15,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-28 03:14:15,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:14:16,806 INFO L124 PetriNetUnfolderBase]: 4066/6151 cut-off events. [2024-06-28 03:14:16,806 INFO L125 PetriNetUnfolderBase]: For 775044/775052 co-relation queries the response was YES. [2024-06-28 03:14:16,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69952 conditions, 6151 events. 4066/6151 cut-off events. For 775044/775052 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 33347 event pairs, 787 based on Foata normal form. 10/6159 useless extension candidates. Maximal degree in co-relation 69820. Up to 5347 conditions per place. [2024-06-28 03:14:16,898 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 403 selfloop transitions, 90 changer transitions 0/586 dead transitions. [2024-06-28 03:14:16,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 586 transitions, 10932 flow [2024-06-28 03:14:16,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:14:16,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:14:16,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 195 transitions. [2024-06-28 03:14:16,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45348837209302323 [2024-06-28 03:14:16,900 INFO L175 Difference]: Start difference. First operand has 294 places, 529 transitions, 9398 flow. Second operand 10 states and 195 transitions. [2024-06-28 03:14:16,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 586 transitions, 10932 flow [2024-06-28 03:14:18,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 586 transitions, 10597 flow, removed 132 selfloop flow, removed 3 redundant places. [2024-06-28 03:14:18,603 INFO L231 Difference]: Finished difference. Result has 302 places, 548 transitions, 9715 flow [2024-06-28 03:14:18,603 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9212, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=448, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9715, PETRI_PLACES=302, PETRI_TRANSITIONS=548} [2024-06-28 03:14:18,603 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 258 predicate places. [2024-06-28 03:14:18,603 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 548 transitions, 9715 flow [2024-06-28 03:14:18,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:14:18,604 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:14:18,604 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:14:18,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-28 03:14:18,604 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)] === [2024-06-28 03:14:18,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:14:18,604 INFO L85 PathProgramCache]: Analyzing trace with hash -377849852, now seen corresponding path program 4 times [2024-06-28 03:14:18,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:14:18,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485445568] [2024-06-28 03:14:18,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:14:18,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:14:18,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:14:19,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:14:19,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:14:19,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485445568] [2024-06-28 03:14:19,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485445568] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:14:19,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:14:19,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:14:19,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694565937] [2024-06-28 03:14:19,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:14:19,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:14:19,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:14:19,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:14:19,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:14:19,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-28 03:14:19,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 548 transitions, 9715 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:14:19,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:14:19,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-28 03:14:19,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:14:21,200 INFO L124 PetriNetUnfolderBase]: 4157/6300 cut-off events. [2024-06-28 03:14:21,200 INFO L125 PetriNetUnfolderBase]: For 802615/802625 co-relation queries the response was YES. [2024-06-28 03:14:21,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71756 conditions, 6300 events. 4157/6300 cut-off events. For 802615/802625 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 34462 event pairs, 787 based on Foata normal form. 12/6310 useless extension candidates. Maximal degree in co-relation 71622. Up to 5445 conditions per place. [2024-06-28 03:14:21,290 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 415 selfloop transitions, 111 changer transitions 0/619 dead transitions. [2024-06-28 03:14:21,290 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 619 transitions, 11594 flow [2024-06-28 03:14:21,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:14:21,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:14:21,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 195 transitions. [2024-06-28 03:14:21,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45348837209302323 [2024-06-28 03:14:21,291 INFO L175 Difference]: Start difference. First operand has 302 places, 548 transitions, 9715 flow. Second operand 10 states and 195 transitions. [2024-06-28 03:14:21,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 619 transitions, 11594 flow [2024-06-28 03:14:22,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 619 transitions, 11109 flow, removed 132 selfloop flow, removed 8 redundant places. [2024-06-28 03:14:22,772 INFO L231 Difference]: Finished difference. Result has 306 places, 583 transitions, 10261 flow [2024-06-28 03:14:22,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9402, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=548, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=455, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10261, PETRI_PLACES=306, PETRI_TRANSITIONS=583} [2024-06-28 03:14:22,773 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 262 predicate places. [2024-06-28 03:14:22,773 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 583 transitions, 10261 flow [2024-06-28 03:14:22,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:14:22,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:14:22,773 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:14:22,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-28 03:14:22,773 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:14:22,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:14:22,774 INFO L85 PathProgramCache]: Analyzing trace with hash 629693222, now seen corresponding path program 5 times [2024-06-28 03:14:22,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:14:22,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112144350] [2024-06-28 03:14:22,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:14:22,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:14:22,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:14:23,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:14:23,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:14:23,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112144350] [2024-06-28 03:14:23,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112144350] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:14:23,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:14:23,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:14:23,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245230091] [2024-06-28 03:14:23,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:14:23,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:14:23,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:14:23,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:14:23,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:14:23,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-28 03:14:23,677 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 583 transitions, 10261 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:14:23,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:14:23,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-28 03:14:23,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:14:25,359 INFO L124 PetriNetUnfolderBase]: 4208/6380 cut-off events. [2024-06-28 03:14:25,360 INFO L125 PetriNetUnfolderBase]: For 828403/828411 co-relation queries the response was YES. [2024-06-28 03:14:25,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72912 conditions, 6380 events. 4208/6380 cut-off events. For 828403/828411 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 35087 event pairs, 795 based on Foata normal form. 10/6388 useless extension candidates. Maximal degree in co-relation 72776. Up to 5499 conditions per place. [2024-06-28 03:14:25,469 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 429 selfloop transitions, 125 changer transitions 0/647 dead transitions. [2024-06-28 03:14:25,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 647 transitions, 12144 flow [2024-06-28 03:14:25,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:14:25,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:14:25,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 195 transitions. [2024-06-28 03:14:25,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45348837209302323 [2024-06-28 03:14:25,470 INFO L175 Difference]: Start difference. First operand has 306 places, 583 transitions, 10261 flow. Second operand 10 states and 195 transitions. [2024-06-28 03:14:25,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 647 transitions, 12144 flow [2024-06-28 03:14:27,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 647 transitions, 11738 flow, removed 131 selfloop flow, removed 6 redundant places. [2024-06-28 03:14:27,426 INFO L231 Difference]: Finished difference. Result has 312 places, 613 transitions, 10858 flow [2024-06-28 03:14:27,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9997, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=583, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=469, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10858, PETRI_PLACES=312, PETRI_TRANSITIONS=613} [2024-06-28 03:14:27,426 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 268 predicate places. [2024-06-28 03:14:27,426 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 613 transitions, 10858 flow [2024-06-28 03:14:27,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:14:27,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:14:27,427 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:14:27,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-28 03:14:27,427 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:14:27,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:14:27,427 INFO L85 PathProgramCache]: Analyzing trace with hash 773584868, now seen corresponding path program 11 times [2024-06-28 03:14:27,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:14:27,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874681487] [2024-06-28 03:14:27,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:14:27,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:14:27,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:14:28,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:14:28,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:14:28,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874681487] [2024-06-28 03:14:28,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874681487] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:14:28,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:14:28,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:14:28,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026749944] [2024-06-28 03:14:28,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:14:28,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:14:28,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:14:28,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:14:28,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:14:28,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-28 03:14:28,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 613 transitions, 10858 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:14:28,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:14:28,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-28 03:14:28,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:14:30,150 INFO L124 PetriNetUnfolderBase]: 4779/7137 cut-off events. [2024-06-28 03:14:30,150 INFO L125 PetriNetUnfolderBase]: For 927862/927864 co-relation queries the response was YES. [2024-06-28 03:14:30,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81795 conditions, 7137 events. 4779/7137 cut-off events. For 927862/927864 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 38809 event pairs, 836 based on Foata normal form. 8/7141 useless extension candidates. Maximal degree in co-relation 81657. Up to 6271 conditions per place. [2024-06-28 03:14:30,242 INFO L140 encePairwiseOnDemand]: 27/43 looper letters, 555 selfloop transitions, 156 changer transitions 0/715 dead transitions. [2024-06-28 03:14:30,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 715 transitions, 14384 flow [2024-06-28 03:14:30,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:14:30,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:14:30,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 200 transitions. [2024-06-28 03:14:30,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-28 03:14:30,244 INFO L175 Difference]: Start difference. First operand has 312 places, 613 transitions, 10858 flow. Second operand 10 states and 200 transitions. [2024-06-28 03:14:30,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 715 transitions, 14384 flow [2024-06-28 03:14:31,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 715 transitions, 14144 flow, removed 62 selfloop flow, removed 4 redundant places. [2024-06-28 03:14:31,865 INFO L231 Difference]: Finished difference. Result has 320 places, 667 transitions, 12351 flow [2024-06-28 03:14:31,865 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10618, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=613, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=467, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12351, PETRI_PLACES=320, PETRI_TRANSITIONS=667} [2024-06-28 03:14:31,866 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 276 predicate places. [2024-06-28 03:14:31,866 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 667 transitions, 12351 flow [2024-06-28 03:14:31,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:14:31,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:14:31,866 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:14:31,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-28 03:14:31,866 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:14:31,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:14:31,867 INFO L85 PathProgramCache]: Analyzing trace with hash 486691028, now seen corresponding path program 12 times [2024-06-28 03:14:31,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:14:31,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421754068] [2024-06-28 03:14:31,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:14:31,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:14:31,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:14:32,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:14:32,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:14:32,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421754068] [2024-06-28 03:14:32,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421754068] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:14:32,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:14:32,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:14:32,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049709794] [2024-06-28 03:14:32,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:14:32,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:14:32,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:14:32,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:14:32,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:14:32,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-28 03:14:32,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 667 transitions, 12351 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:14:32,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:14:32,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-28 03:14:32,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:14:34,628 INFO L124 PetriNetUnfolderBase]: 4767/7119 cut-off events. [2024-06-28 03:14:34,629 INFO L125 PetriNetUnfolderBase]: For 940542/940544 co-relation queries the response was YES. [2024-06-28 03:14:34,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82626 conditions, 7119 events. 4767/7119 cut-off events. For 940542/940544 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 38727 event pairs, 852 based on Foata normal form. 8/7123 useless extension candidates. Maximal degree in co-relation 82485. Up to 6265 conditions per place. [2024-06-28 03:14:34,733 INFO L140 encePairwiseOnDemand]: 27/43 looper letters, 565 selfloop transitions, 145 changer transitions 0/714 dead transitions. [2024-06-28 03:14:34,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 714 transitions, 14539 flow [2024-06-28 03:14:34,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:14:34,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:14:34,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 199 transitions. [2024-06-28 03:14:34,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4627906976744186 [2024-06-28 03:14:34,734 INFO L175 Difference]: Start difference. First operand has 320 places, 667 transitions, 12351 flow. Second operand 10 states and 199 transitions. [2024-06-28 03:14:34,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 714 transitions, 14539 flow [2024-06-28 03:14:36,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 714 transitions, 14290 flow, removed 109 selfloop flow, removed 3 redundant places. [2024-06-28 03:14:37,000 INFO L231 Difference]: Finished difference. Result has 327 places, 667 transitions, 12408 flow [2024-06-28 03:14:37,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12102, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=667, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12408, PETRI_PLACES=327, PETRI_TRANSITIONS=667} [2024-06-28 03:14:37,001 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 283 predicate places. [2024-06-28 03:14:37,001 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 667 transitions, 12408 flow [2024-06-28 03:14:37,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:14:37,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:14:37,001 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:14:37,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-28 03:14:37,001 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:14:37,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:14:37,002 INFO L85 PathProgramCache]: Analyzing trace with hash -290556238, now seen corresponding path program 13 times [2024-06-28 03:14:37,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:14:37,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801411943] [2024-06-28 03:14:37,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:14:37,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:14:37,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:14:37,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:14:37,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:14:37,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801411943] [2024-06-28 03:14:37,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801411943] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:14:37,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:14:37,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:14:37,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060087800] [2024-06-28 03:14:37,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:14:37,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:14:37,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:14:37,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:14:37,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:14:37,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-28 03:14:37,823 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 667 transitions, 12408 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:14:37,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:14:37,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-28 03:14:37,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:14:39,817 INFO L124 PetriNetUnfolderBase]: 5143/7685 cut-off events. [2024-06-28 03:14:39,817 INFO L125 PetriNetUnfolderBase]: For 1023062/1023068 co-relation queries the response was YES. [2024-06-28 03:14:39,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89577 conditions, 7685 events. 5143/7685 cut-off events. For 1023062/1023068 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 42505 event pairs, 883 based on Foata normal form. 12/7695 useless extension candidates. Maximal degree in co-relation 89434. Up to 6667 conditions per place. [2024-06-28 03:14:39,957 INFO L140 encePairwiseOnDemand]: 27/43 looper letters, 597 selfloop transitions, 167 changer transitions 0/768 dead transitions. [2024-06-28 03:14:39,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 768 transitions, 16236 flow [2024-06-28 03:14:39,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:14:39,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:14:39,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 202 transitions. [2024-06-28 03:14:39,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4697674418604651 [2024-06-28 03:14:39,958 INFO L175 Difference]: Start difference. First operand has 327 places, 667 transitions, 12408 flow. Second operand 10 states and 202 transitions. [2024-06-28 03:14:39,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 768 transitions, 16236 flow [2024-06-28 03:14:42,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 768 transitions, 15971 flow, removed 38 selfloop flow, removed 5 redundant places. [2024-06-28 03:14:42,462 INFO L231 Difference]: Finished difference. Result has 334 places, 714 transitions, 13782 flow [2024-06-28 03:14:42,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12206, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=667, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=509, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13782, PETRI_PLACES=334, PETRI_TRANSITIONS=714} [2024-06-28 03:14:42,463 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 290 predicate places. [2024-06-28 03:14:42,463 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 714 transitions, 13782 flow [2024-06-28 03:14:42,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:14:42,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:14:42,464 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:14:42,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-28 03:14:42,464 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:14:42,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:14:42,464 INFO L85 PathProgramCache]: Analyzing trace with hash -290549728, now seen corresponding path program 14 times [2024-06-28 03:14:42,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:14:42,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890177247] [2024-06-28 03:14:42,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:14:42,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:14:42,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:14:43,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:14:43,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:14:43,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890177247] [2024-06-28 03:14:43,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890177247] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:14:43,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:14:43,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:14:43,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090623648] [2024-06-28 03:14:43,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:14:43,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:14:43,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:14:43,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:14:43,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:14:43,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-28 03:14:43,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 714 transitions, 13782 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:14:43,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:14:43,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-28 03:14:43,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:14:45,355 INFO L124 PetriNetUnfolderBase]: 5131/7670 cut-off events. [2024-06-28 03:14:45,355 INFO L125 PetriNetUnfolderBase]: For 1042308/1042314 co-relation queries the response was YES. [2024-06-28 03:14:45,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90104 conditions, 7670 events. 5131/7670 cut-off events. For 1042308/1042314 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 42486 event pairs, 857 based on Foata normal form. 12/7680 useless extension candidates. Maximal degree in co-relation 89958. Up to 6661 conditions per place. [2024-06-28 03:14:45,492 INFO L140 encePairwiseOnDemand]: 27/43 looper letters, 580 selfloop transitions, 182 changer transitions 0/766 dead transitions. [2024-06-28 03:14:45,492 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 766 transitions, 16229 flow [2024-06-28 03:14:45,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:14:45,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:14:45,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 200 transitions. [2024-06-28 03:14:45,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-28 03:14:45,493 INFO L175 Difference]: Start difference. First operand has 334 places, 714 transitions, 13782 flow. Second operand 10 states and 200 transitions. [2024-06-28 03:14:45,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 766 transitions, 16229 flow [2024-06-28 03:14:48,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 766 transitions, 15298 flow, removed 118 selfloop flow, removed 9 redundant places. [2024-06-28 03:14:48,530 INFO L231 Difference]: Finished difference. Result has 337 places, 721 transitions, 13528 flow [2024-06-28 03:14:48,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12856, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=714, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=532, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13528, PETRI_PLACES=337, PETRI_TRANSITIONS=721} [2024-06-28 03:14:48,541 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 293 predicate places. [2024-06-28 03:14:48,541 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 721 transitions, 13528 flow [2024-06-28 03:14:48,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:14:48,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:14:48,541 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:14:48,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-28 03:14:48,542 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:14:48,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:14:48,542 INFO L85 PathProgramCache]: Analyzing trace with hash 1913701610, now seen corresponding path program 1 times [2024-06-28 03:14:48,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:14:48,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434983833] [2024-06-28 03:14:48,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:14:48,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:14:48,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:14:49,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:14:49,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:14:49,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434983833] [2024-06-28 03:14:49,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434983833] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:14:49,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:14:49,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:14:49,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107807517] [2024-06-28 03:14:49,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:14:49,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:14:49,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:14:49,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:14:49,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:14:49,380 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-28 03:14:49,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 721 transitions, 13528 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) [2024-06-28 03:14:49,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:14:49,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-28 03:14:49,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:14:51,127 INFO L124 PetriNetUnfolderBase]: 4675/7181 cut-off events. [2024-06-28 03:14:51,127 INFO L125 PetriNetUnfolderBase]: For 929544/929600 co-relation queries the response was YES. [2024-06-28 03:14:51,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82361 conditions, 7181 events. 4675/7181 cut-off events. For 929544/929600 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 41357 event pairs, 1110 based on Foata normal form. 47/7203 useless extension candidates. Maximal degree in co-relation 82216. Up to 6455 conditions per place. [2024-06-28 03:14:51,236 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 652 selfloop transitions, 20 changer transitions 0/736 dead transitions. [2024-06-28 03:14:51,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 736 transitions, 15103 flow [2024-06-28 03:14:51,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 03:14:51,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 03:14:51,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 120 transitions. [2024-06-28 03:14:51,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-28 03:14:51,238 INFO L175 Difference]: Start difference. First operand has 337 places, 721 transitions, 13528 flow. Second operand 6 states and 120 transitions. [2024-06-28 03:14:51,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 736 transitions, 15103 flow [2024-06-28 03:14:53,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 736 transitions, 14551 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-28 03:14:53,401 INFO L231 Difference]: Finished difference. Result has 335 places, 724 transitions, 13065 flow [2024-06-28 03:14:53,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12977, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=721, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=703, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=13065, PETRI_PLACES=335, PETRI_TRANSITIONS=724} [2024-06-28 03:14:53,402 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 291 predicate places. [2024-06-28 03:14:53,403 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 724 transitions, 13065 flow [2024-06-28 03:14:53,403 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) [2024-06-28 03:14:53,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:14:53,403 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:14:53,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-28 03:14:53,403 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:14:53,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:14:53,404 INFO L85 PathProgramCache]: Analyzing trace with hash -1345081076, now seen corresponding path program 2 times [2024-06-28 03:14:53,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:14:53,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402371967] [2024-06-28 03:14:53,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:14:53,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:14:53,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:14:54,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:14:54,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:14:54,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402371967] [2024-06-28 03:14:54,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402371967] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:14:54,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:14:54,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:14:54,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583375683] [2024-06-28 03:14:54,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:14:54,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:14:54,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:14:54,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:14:54,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:14:54,155 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-28 03:14:54,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 724 transitions, 13065 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) [2024-06-28 03:14:54,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:14:54,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-28 03:14:54,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:14:56,094 INFO L124 PetriNetUnfolderBase]: 4638/7123 cut-off events. [2024-06-28 03:14:56,095 INFO L125 PetriNetUnfolderBase]: For 941000/941056 co-relation queries the response was YES. [2024-06-28 03:14:56,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80708 conditions, 7123 events. 4638/7123 cut-off events. For 941000/941056 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 40993 event pairs, 1108 based on Foata normal form. 46/7144 useless extension candidates. Maximal degree in co-relation 80563. Up to 6433 conditions per place. [2024-06-28 03:14:56,189 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 656 selfloop transitions, 12 changer transitions 0/732 dead transitions. [2024-06-28 03:14:56,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 732 transitions, 14431 flow [2024-06-28 03:14:56,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 03:14:56,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 03:14:56,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 112 transitions. [2024-06-28 03:14:56,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-06-28 03:14:56,191 INFO L175 Difference]: Start difference. First operand has 335 places, 724 transitions, 13065 flow. Second operand 6 states and 112 transitions. [2024-06-28 03:14:56,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 732 transitions, 14431 flow [2024-06-28 03:14:58,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 732 transitions, 14400 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-28 03:14:58,809 INFO L231 Difference]: Finished difference. Result has 338 places, 724 transitions, 13064 flow [2024-06-28 03:14:58,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=13034, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=724, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=712, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=13064, PETRI_PLACES=338, PETRI_TRANSITIONS=724} [2024-06-28 03:14:58,810 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 294 predicate places. [2024-06-28 03:14:58,818 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 724 transitions, 13064 flow [2024-06-28 03:14:58,818 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) [2024-06-28 03:14:58,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:14:58,818 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:14:58,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-28 03:14:58,818 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:14:58,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:14:58,819 INFO L85 PathProgramCache]: Analyzing trace with hash -1744614974, now seen corresponding path program 1 times [2024-06-28 03:14:58,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:14:58,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601554222] [2024-06-28 03:14:58,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:14:58,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:14:58,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:14:59,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:14:59,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:14:59,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601554222] [2024-06-28 03:14:59,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601554222] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:14:59,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:14:59,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:14:59,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187949549] [2024-06-28 03:14:59,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:14:59,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:14:59,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:14:59,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:14:59,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:14:59,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-28 03:14:59,965 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 724 transitions, 13064 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:14:59,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:14:59,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-28 03:14:59,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:15:02,147 INFO L124 PetriNetUnfolderBase]: 5098/7624 cut-off events. [2024-06-28 03:15:02,147 INFO L125 PetriNetUnfolderBase]: For 1080773/1080779 co-relation queries the response was YES. [2024-06-28 03:15:02,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88047 conditions, 7624 events. 5098/7624 cut-off events. For 1080773/1080779 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 42296 event pairs, 977 based on Foata normal form. 9/7631 useless extension candidates. Maximal degree in co-relation 87901. Up to 6831 conditions per place. [2024-06-28 03:15:02,251 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 604 selfloop transitions, 169 changer transitions 0/777 dead transitions. [2024-06-28 03:15:02,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 777 transitions, 15756 flow [2024-06-28 03:15:02,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:15:02,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:15:02,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 197 transitions. [2024-06-28 03:15:02,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45813953488372094 [2024-06-28 03:15:02,252 INFO L175 Difference]: Start difference. First operand has 338 places, 724 transitions, 13064 flow. Second operand 10 states and 197 transitions. [2024-06-28 03:15:02,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 777 transitions, 15756 flow [2024-06-28 03:15:04,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 777 transitions, 15707 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-28 03:15:04,521 INFO L231 Difference]: Finished difference. Result has 344 places, 735 transitions, 13875 flow [2024-06-28 03:15:04,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=13015, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=724, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=560, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13875, PETRI_PLACES=344, PETRI_TRANSITIONS=735} [2024-06-28 03:15:04,522 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 300 predicate places. [2024-06-28 03:15:04,522 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 735 transitions, 13875 flow [2024-06-28 03:15:04,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:15:04,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:15:04,522 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:15:04,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-28 03:15:04,523 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:15:04,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:15:04,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1740890107, now seen corresponding path program 1 times [2024-06-28 03:15:04,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:15:04,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014456638] [2024-06-28 03:15:04,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:15:04,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:15:04,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:15:05,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:15:05,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:15:05,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014456638] [2024-06-28 03:15:05,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014456638] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:15:05,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:15:05,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:15:05,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159946542] [2024-06-28 03:15:05,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:15:05,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:15:05,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:15:05,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:15:05,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:15:05,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-28 03:15:05,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 735 transitions, 13875 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:15:05,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:15:05,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-28 03:15:05,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:15:07,673 INFO L124 PetriNetUnfolderBase]: 5116/7647 cut-off events. [2024-06-28 03:15:07,673 INFO L125 PetriNetUnfolderBase]: For 1123559/1123563 co-relation queries the response was YES. [2024-06-28 03:15:07,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90142 conditions, 7647 events. 5116/7647 cut-off events. For 1123559/1123563 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 42302 event pairs, 878 based on Foata normal form. 7/7649 useless extension candidates. Maximal degree in co-relation 89993. Up to 6960 conditions per place. [2024-06-28 03:15:07,790 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 676 selfloop transitions, 145 changer transitions 0/825 dead transitions. [2024-06-28 03:15:07,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 825 transitions, 17266 flow [2024-06-28 03:15:07,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:15:07,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:15:07,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-28 03:15:07,792 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44883720930232557 [2024-06-28 03:15:07,792 INFO L175 Difference]: Start difference. First operand has 344 places, 735 transitions, 13875 flow. Second operand 10 states and 193 transitions. [2024-06-28 03:15:07,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 825 transitions, 17266 flow [2024-06-28 03:15:10,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 825 transitions, 16906 flow, removed 119 selfloop flow, removed 5 redundant places. [2024-06-28 03:15:10,498 INFO L231 Difference]: Finished difference. Result has 351 places, 783 transitions, 15097 flow [2024-06-28 03:15:10,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=13515, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=735, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=592, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=15097, PETRI_PLACES=351, PETRI_TRANSITIONS=783} [2024-06-28 03:15:10,499 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 307 predicate places. [2024-06-28 03:15:10,499 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 783 transitions, 15097 flow [2024-06-28 03:15:10,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:15:10,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:15:10,499 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:15:10,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-28 03:15:10,500 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:15:10,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:15:10,500 INFO L85 PathProgramCache]: Analyzing trace with hash -1596999577, now seen corresponding path program 2 times [2024-06-28 03:15:10,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:15:10,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407847821] [2024-06-28 03:15:10,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:15:10,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:15:10,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:15:11,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:15:11,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:15:11,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407847821] [2024-06-28 03:15:11,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407847821] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:15:11,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:15:11,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:15:11,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564262528] [2024-06-28 03:15:11,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:15:11,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:15:11,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:15:11,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:15:11,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:15:11,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-28 03:15:11,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 783 transitions, 15097 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:15:11,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:15:11,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-28 03:15:11,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:15:13,656 INFO L124 PetriNetUnfolderBase]: 5134/7665 cut-off events. [2024-06-28 03:15:13,656 INFO L125 PetriNetUnfolderBase]: For 1156139/1156141 co-relation queries the response was YES. [2024-06-28 03:15:13,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92017 conditions, 7665 events. 5134/7665 cut-off events. For 1156139/1156141 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 42363 event pairs, 730 based on Foata normal form. 5/7663 useless extension candidates. Maximal degree in co-relation 91864. Up to 6542 conditions per place. [2024-06-28 03:15:13,781 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 676 selfloop transitions, 212 changer transitions 0/892 dead transitions. [2024-06-28 03:15:13,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 892 transitions, 18931 flow [2024-06-28 03:15:13,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:15:13,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:15:13,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-28 03:15:13,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44883720930232557 [2024-06-28 03:15:13,782 INFO L175 Difference]: Start difference. First operand has 351 places, 783 transitions, 15097 flow. Second operand 10 states and 193 transitions. [2024-06-28 03:15:13,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 892 transitions, 18931 flow [2024-06-28 03:15:17,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 892 transitions, 18649 flow, removed 80 selfloop flow, removed 5 redundant places. [2024-06-28 03:15:17,209 INFO L231 Difference]: Finished difference. Result has 358 places, 843 transitions, 16769 flow [2024-06-28 03:15:17,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=14815, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=783, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=573, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=16769, PETRI_PLACES=358, PETRI_TRANSITIONS=843} [2024-06-28 03:15:17,212 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 314 predicate places. [2024-06-28 03:15:17,212 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 843 transitions, 16769 flow [2024-06-28 03:15:17,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:15:17,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:15:17,213 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:15:17,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-28 03:15:17,213 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:15:17,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:15:17,214 INFO L85 PathProgramCache]: Analyzing trace with hash -1815997669, now seen corresponding path program 3 times [2024-06-28 03:15:17,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:15:17,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245807519] [2024-06-28 03:15:17,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:15:17,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:15:17,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:15:18,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:15:18,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:15:18,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245807519] [2024-06-28 03:15:18,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245807519] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:15:18,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:15:18,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:15:18,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857004966] [2024-06-28 03:15:18,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:15:18,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:15:18,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:15:18,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:15:18,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:15:18,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-28 03:15:18,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 843 transitions, 16769 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:15:18,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:15:18,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-28 03:15:18,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:15:20,526 INFO L124 PetriNetUnfolderBase]: 5152/7701 cut-off events. [2024-06-28 03:15:20,527 INFO L125 PetriNetUnfolderBase]: For 1194813/1194815 co-relation queries the response was YES. [2024-06-28 03:15:20,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94526 conditions, 7701 events. 5152/7701 cut-off events. For 1194813/1194815 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 42696 event pairs, 730 based on Foata normal form. 5/7699 useless extension candidates. Maximal degree in co-relation 94369. Up to 6568 conditions per place. [2024-06-28 03:15:20,855 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 649 selfloop transitions, 243 changer transitions 0/896 dead transitions. [2024-06-28 03:15:20,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 896 transitions, 19344 flow [2024-06-28 03:15:20,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:15:20,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:15:20,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 192 transitions. [2024-06-28 03:15:20,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44651162790697674 [2024-06-28 03:15:20,856 INFO L175 Difference]: Start difference. First operand has 358 places, 843 transitions, 16769 flow. Second operand 10 states and 192 transitions. [2024-06-28 03:15:20,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 896 transitions, 19344 flow [2024-06-28 03:15:23,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 896 transitions, 18976 flow, removed 88 selfloop flow, removed 5 redundant places. [2024-06-28 03:15:23,922 INFO L231 Difference]: Finished difference. Result has 364 places, 854 transitions, 17217 flow [2024-06-28 03:15:23,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=16405, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=843, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=232, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=601, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=17217, PETRI_PLACES=364, PETRI_TRANSITIONS=854} [2024-06-28 03:15:23,930 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 320 predicate places. [2024-06-28 03:15:23,930 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 854 transitions, 17217 flow [2024-06-28 03:15:23,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:15:23,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:15:23,930 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:15:23,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-28 03:15:23,930 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:15:23,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:15:23,931 INFO L85 PathProgramCache]: Analyzing trace with hash -498707402, now seen corresponding path program 1 times [2024-06-28 03:15:23,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:15:23,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455971951] [2024-06-28 03:15:23,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:15:23,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:15:23,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:15:25,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:15:25,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:15:25,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455971951] [2024-06-28 03:15:25,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455971951] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:15:25,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:15:25,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:15:25,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584143949] [2024-06-28 03:15:25,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:15:25,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:15:25,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:15:25,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:15:25,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:15:25,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-28 03:15:25,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 854 transitions, 17217 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:15:25,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:15:25,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-28 03:15:25,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:15:27,436 INFO L124 PetriNetUnfolderBase]: 5180/7782 cut-off events. [2024-06-28 03:15:27,436 INFO L125 PetriNetUnfolderBase]: For 1242836/1242838 co-relation queries the response was YES. [2024-06-28 03:15:27,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96663 conditions, 7782 events. 5180/7782 cut-off events. For 1242836/1242838 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 43726 event pairs, 862 based on Foata normal form. 8/7788 useless extension candidates. Maximal degree in co-relation 96503. Up to 7157 conditions per place. [2024-06-28 03:15:27,563 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 765 selfloop transitions, 125 changer transitions 0/894 dead transitions. [2024-06-28 03:15:27,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 894 transitions, 19643 flow [2024-06-28 03:15:27,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:15:27,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:15:27,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-28 03:15:27,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43953488372093025 [2024-06-28 03:15:27,564 INFO L175 Difference]: Start difference. First operand has 364 places, 854 transitions, 17217 flow. Second operand 10 states and 189 transitions. [2024-06-28 03:15:27,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 894 transitions, 19643 flow [2024-06-28 03:15:30,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 894 transitions, 19146 flow, removed 86 selfloop flow, removed 6 redundant places. [2024-06-28 03:15:31,014 INFO L231 Difference]: Finished difference. Result has 368 places, 857 transitions, 17158 flow [2024-06-28 03:15:31,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=16720, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=854, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=729, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=17158, PETRI_PLACES=368, PETRI_TRANSITIONS=857} [2024-06-28 03:15:31,015 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 324 predicate places. [2024-06-28 03:15:31,015 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 857 transitions, 17158 flow [2024-06-28 03:15:31,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:15:31,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:15:31,016 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:15:31,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-28 03:15:31,016 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:15:31,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:15:31,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1596790327, now seen corresponding path program 4 times [2024-06-28 03:15:31,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:15:31,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891183872] [2024-06-28 03:15:31,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:15:31,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:15:31,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:15:31,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:15:31,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:15:31,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891183872] [2024-06-28 03:15:31,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891183872] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:15:31,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:15:31,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:15:31,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832315944] [2024-06-28 03:15:31,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:15:31,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:15:31,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:15:31,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:15:31,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:15:32,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-28 03:15:32,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 857 transitions, 17158 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:15:32,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:15:32,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-28 03:15:32,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:15:34,603 INFO L124 PetriNetUnfolderBase]: 5240/7844 cut-off events. [2024-06-28 03:15:34,604 INFO L125 PetriNetUnfolderBase]: For 1282866/1282868 co-relation queries the response was YES. [2024-06-28 03:15:34,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98171 conditions, 7844 events. 5240/7844 cut-off events. For 1282866/1282868 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 43695 event pairs, 742 based on Foata normal form. 8/7848 useless extension candidates. Maximal degree in co-relation 98010. Up to 5859 conditions per place. [2024-06-28 03:15:34,731 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 501 selfloop transitions, 403 changer transitions 0/908 dead transitions. [2024-06-28 03:15:34,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 908 transitions, 20194 flow [2024-06-28 03:15:34,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 03:15:34,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 03:15:34,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 217 transitions. [2024-06-28 03:15:34,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4587737843551797 [2024-06-28 03:15:34,732 INFO L175 Difference]: Start difference. First operand has 368 places, 857 transitions, 17158 flow. Second operand 11 states and 217 transitions. [2024-06-28 03:15:34,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 908 transitions, 20194 flow [2024-06-28 03:15:37,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 908 transitions, 19780 flow, removed 84 selfloop flow, removed 8 redundant places. [2024-06-28 03:15:37,965 INFO L231 Difference]: Finished difference. Result has 371 places, 866 transitions, 18016 flow [2024-06-28 03:15:37,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=16744, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=857, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=398, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=458, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=18016, PETRI_PLACES=371, PETRI_TRANSITIONS=866} [2024-06-28 03:15:37,966 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 327 predicate places. [2024-06-28 03:15:37,966 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 866 transitions, 18016 flow [2024-06-28 03:15:37,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:15:37,966 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:15:37,966 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:15:37,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-28 03:15:37,966 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:15:37,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:15:37,967 INFO L85 PathProgramCache]: Analyzing trace with hash -544780283, now seen corresponding path program 5 times [2024-06-28 03:15:37,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:15:37,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611159410] [2024-06-28 03:15:37,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:15:37,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:15:37,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:15:38,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:15:38,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:15:38,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611159410] [2024-06-28 03:15:38,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611159410] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:15:38,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:15:38,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:15:38,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087718927] [2024-06-28 03:15:38,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:15:38,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:15:38,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:15:38,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:15:38,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:15:39,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-28 03:15:39,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 866 transitions, 18016 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:15:39,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:15:39,056 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-28 03:15:39,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:15:41,401 INFO L124 PetriNetUnfolderBase]: 5258/7907 cut-off events. [2024-06-28 03:15:41,401 INFO L125 PetriNetUnfolderBase]: For 1321050/1321056 co-relation queries the response was YES. [2024-06-28 03:15:41,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100337 conditions, 7907 events. 5258/7907 cut-off events. For 1321050/1321056 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 44613 event pairs, 683 based on Foata normal form. 9/7914 useless extension candidates. Maximal degree in co-relation 100175. Up to 6395 conditions per place. [2024-06-28 03:15:41,528 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 693 selfloop transitions, 235 changer transitions 0/932 dead transitions. [2024-06-28 03:15:41,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 932 transitions, 21144 flow [2024-06-28 03:15:41,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:15:41,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:15:41,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 194 transitions. [2024-06-28 03:15:41,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4511627906976744 [2024-06-28 03:15:41,529 INFO L175 Difference]: Start difference. First operand has 371 places, 866 transitions, 18016 flow. Second operand 10 states and 194 transitions. [2024-06-28 03:15:41,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 932 transitions, 21144 flow [2024-06-28 03:15:45,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 932 transitions, 20382 flow, removed 118 selfloop flow, removed 7 redundant places. [2024-06-28 03:15:45,036 INFO L231 Difference]: Finished difference. Result has 376 places, 885 transitions, 18189 flow [2024-06-28 03:15:45,037 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=17254, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=866, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=217, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=633, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=18189, PETRI_PLACES=376, PETRI_TRANSITIONS=885} [2024-06-28 03:15:45,037 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 332 predicate places. [2024-06-28 03:15:45,037 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 885 transitions, 18189 flow [2024-06-28 03:15:45,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:15:45,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:15:45,038 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:15:45,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-28 03:15:45,038 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:15:45,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:15:45,039 INFO L85 PathProgramCache]: Analyzing trace with hash 553511613, now seen corresponding path program 6 times [2024-06-28 03:15:45,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:15:45,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563113696] [2024-06-28 03:15:45,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:15:45,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:15:45,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:15:46,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:15:46,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:15:46,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563113696] [2024-06-28 03:15:46,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563113696] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:15:46,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:15:46,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:15:46,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166763900] [2024-06-28 03:15:46,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:15:46,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:15:46,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:15:46,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:15:46,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:15:46,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-28 03:15:46,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 885 transitions, 18189 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:15:46,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:15:46,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-28 03:15:46,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:15:48,790 INFO L124 PetriNetUnfolderBase]: 5318/7970 cut-off events. [2024-06-28 03:15:48,790 INFO L125 PetriNetUnfolderBase]: For 1369788/1369794 co-relation queries the response was YES. [2024-06-28 03:15:48,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103132 conditions, 7970 events. 5318/7970 cut-off events. For 1369788/1369794 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 44673 event pairs, 736 based on Foata normal form. 12/7980 useless extension candidates. Maximal degree in co-relation 102966. Up to 5758 conditions per place. [2024-06-28 03:15:48,916 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 568 selfloop transitions, 364 changer transitions 0/936 dead transitions. [2024-06-28 03:15:48,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 936 transitions, 21500 flow [2024-06-28 03:15:48,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 03:15:48,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 03:15:48,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 220 transitions. [2024-06-28 03:15:48,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-28 03:15:48,918 INFO L175 Difference]: Start difference. First operand has 376 places, 885 transitions, 18189 flow. Second operand 11 states and 220 transitions. [2024-06-28 03:15:48,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 936 transitions, 21500 flow [2024-06-28 03:15:53,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 936 transitions, 21022 flow, removed 107 selfloop flow, removed 5 redundant places. [2024-06-28 03:15:53,174 INFO L231 Difference]: Finished difference. Result has 382 places, 894 transitions, 18929 flow [2024-06-28 03:15:53,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=17717, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=885, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=359, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=525, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=18929, PETRI_PLACES=382, PETRI_TRANSITIONS=894} [2024-06-28 03:15:53,175 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 338 predicate places. [2024-06-28 03:15:53,175 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 894 transitions, 18929 flow [2024-06-28 03:15:53,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:15:53,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:15:53,176 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:15:53,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-28 03:15:53,176 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:15:53,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:15:53,176 INFO L85 PathProgramCache]: Analyzing trace with hash 560920923, now seen corresponding path program 7 times [2024-06-28 03:15:53,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:15:53,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847279309] [2024-06-28 03:15:53,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:15:53,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:15:53,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:15:54,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:15:54,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:15:54,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847279309] [2024-06-28 03:15:54,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847279309] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:15:54,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:15:54,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:15:54,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737763316] [2024-06-28 03:15:54,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:15:54,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:15:54,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:15:54,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:15:54,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:15:54,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-28 03:15:54,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 894 transitions, 18929 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:15:54,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:15:54,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-28 03:15:54,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:15:57,218 INFO L124 PetriNetUnfolderBase]: 5354/8029 cut-off events. [2024-06-28 03:15:57,218 INFO L125 PetriNetUnfolderBase]: For 1415788/1415794 co-relation queries the response was YES. [2024-06-28 03:15:57,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106107 conditions, 8029 events. 5354/8029 cut-off events. For 1415788/1415794 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 45121 event pairs, 734 based on Foata normal form. 12/8039 useless extension candidates. Maximal degree in co-relation 105939. Up to 5361 conditions per place. [2024-06-28 03:15:57,351 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 428 selfloop transitions, 513 changer transitions 0/945 dead transitions. [2024-06-28 03:15:57,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 945 transitions, 21913 flow [2024-06-28 03:15:57,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 03:15:57,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 03:15:57,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 235 transitions. [2024-06-28 03:15:57,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45542635658914726 [2024-06-28 03:15:57,353 INFO L175 Difference]: Start difference. First operand has 382 places, 894 transitions, 18929 flow. Second operand 12 states and 235 transitions. [2024-06-28 03:15:57,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 945 transitions, 21913 flow [2024-06-28 03:16:02,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 945 transitions, 21279 flow, removed 135 selfloop flow, removed 6 redundant places. [2024-06-28 03:16:02,051 INFO L231 Difference]: Finished difference. Result has 388 places, 899 transitions, 19592 flow [2024-06-28 03:16:02,052 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=18295, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=894, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=508, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=19592, PETRI_PLACES=388, PETRI_TRANSITIONS=899} [2024-06-28 03:16:02,052 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 344 predicate places. [2024-06-28 03:16:02,052 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 899 transitions, 19592 flow [2024-06-28 03:16:02,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:16:02,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:16:02,053 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:16:02,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-28 03:16:02,053 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:16:02,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:16:02,053 INFO L85 PathProgramCache]: Analyzing trace with hash -544570754, now seen corresponding path program 2 times [2024-06-28 03:16:02,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:16:02,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570299449] [2024-06-28 03:16:02,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:16:02,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:16:02,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:16:03,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:16:03,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:16:03,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570299449] [2024-06-28 03:16:03,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570299449] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:16:03,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:16:03,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:16:03,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636476203] [2024-06-28 03:16:03,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:16:03,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:16:03,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:16:03,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:16:03,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:16:03,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-28 03:16:03,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 899 transitions, 19592 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:16:03,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:16:03,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-28 03:16:03,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:16:06,050 INFO L124 PetriNetUnfolderBase]: 5382/8067 cut-off events. [2024-06-28 03:16:06,051 INFO L125 PetriNetUnfolderBase]: For 1450130/1450134 co-relation queries the response was YES. [2024-06-28 03:16:06,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108944 conditions, 8067 events. 5382/8067 cut-off events. For 1450130/1450134 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 45330 event pairs, 799 based on Foata normal form. 10/8075 useless extension candidates. Maximal degree in co-relation 108774. Up to 7240 conditions per place. [2024-06-28 03:16:06,309 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 775 selfloop transitions, 159 changer transitions 0/938 dead transitions. [2024-06-28 03:16:06,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 938 transitions, 22308 flow [2024-06-28 03:16:06,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:16:06,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:16:06,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-28 03:16:06,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-28 03:16:06,317 INFO L175 Difference]: Start difference. First operand has 388 places, 899 transitions, 19592 flow. Second operand 10 states and 190 transitions. [2024-06-28 03:16:06,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 938 transitions, 22308 flow [2024-06-28 03:16:09,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 938 transitions, 21053 flow, removed 119 selfloop flow, removed 10 redundant places. [2024-06-28 03:16:09,654 INFO L231 Difference]: Finished difference. Result has 388 places, 902 transitions, 18865 flow [2024-06-28 03:16:09,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=18337, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=899, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=740, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=18865, PETRI_PLACES=388, PETRI_TRANSITIONS=902} [2024-06-28 03:16:09,655 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 344 predicate places. [2024-06-28 03:16:09,655 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 902 transitions, 18865 flow [2024-06-28 03:16:09,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:16:09,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:16:09,655 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:16:09,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-28 03:16:09,655 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:16:09,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:16:09,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1449933198, now seen corresponding path program 3 times [2024-06-28 03:16:09,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:16:09,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078601780] [2024-06-28 03:16:09,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:16:09,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:16:09,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:16:10,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:16:10,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:16:10,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078601780] [2024-06-28 03:16:10,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078601780] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:16:10,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:16:10,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:16:10,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121279938] [2024-06-28 03:16:10,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:16:10,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:16:10,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:16:10,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:16:10,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:16:10,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-28 03:16:10,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 902 transitions, 18865 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:16:10,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:16:10,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-28 03:16:10,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:16:13,823 INFO L124 PetriNetUnfolderBase]: 5410/8116 cut-off events. [2024-06-28 03:16:13,823 INFO L125 PetriNetUnfolderBase]: For 1474689/1474693 co-relation queries the response was YES. [2024-06-28 03:16:13,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108001 conditions, 8116 events. 5410/8116 cut-off events. For 1474689/1474693 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 45783 event pairs, 799 based on Foata normal form. 10/8124 useless extension candidates. Maximal degree in co-relation 107830. Up to 7284 conditions per place. [2024-06-28 03:16:13,949 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 753 selfloop transitions, 183 changer transitions 0/940 dead transitions. [2024-06-28 03:16:13,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 940 transitions, 21429 flow [2024-06-28 03:16:13,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:16:13,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:16:13,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-28 03:16:13,965 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43953488372093025 [2024-06-28 03:16:13,965 INFO L175 Difference]: Start difference. First operand has 388 places, 902 transitions, 18865 flow. Second operand 10 states and 189 transitions. [2024-06-28 03:16:13,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 940 transitions, 21429 flow [2024-06-28 03:16:17,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 940 transitions, 20925 flow, removed 95 selfloop flow, removed 8 redundant places. [2024-06-28 03:16:17,382 INFO L231 Difference]: Finished difference. Result has 390 places, 905 transitions, 18943 flow [2024-06-28 03:16:17,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=18361, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=902, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=719, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=18943, PETRI_PLACES=390, PETRI_TRANSITIONS=905} [2024-06-28 03:16:17,384 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 346 predicate places. [2024-06-28 03:16:17,384 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 905 transitions, 18943 flow [2024-06-28 03:16:17,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:16:17,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:16:17,385 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:16:17,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-28 03:16:17,385 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:16:17,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:16:17,385 INFO L85 PathProgramCache]: Analyzing trace with hash 560921202, now seen corresponding path program 4 times [2024-06-28 03:16:17,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:16:17,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989612920] [2024-06-28 03:16:17,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:16:17,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:16:17,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:16:18,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:16:18,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:16:18,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989612920] [2024-06-28 03:16:18,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989612920] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:16:18,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:16:18,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:16:18,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766318012] [2024-06-28 03:16:18,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:16:18,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:16:18,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:16:18,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:16:18,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:16:18,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-28 03:16:18,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 905 transitions, 18943 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:16:18,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:16:18,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-28 03:16:18,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:16:21,406 INFO L124 PetriNetUnfolderBase]: 5528/8287 cut-off events. [2024-06-28 03:16:21,406 INFO L125 PetriNetUnfolderBase]: For 1506123/1506127 co-relation queries the response was YES. [2024-06-28 03:16:21,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109530 conditions, 8287 events. 5528/8287 cut-off events. For 1506123/1506127 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 46823 event pairs, 783 based on Foata normal form. 10/8293 useless extension candidates. Maximal degree in co-relation 109358. Up to 7564 conditions per place. [2024-06-28 03:16:21,538 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 811 selfloop transitions, 147 changer transitions 0/962 dead transitions. [2024-06-28 03:16:21,538 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 962 transitions, 21874 flow [2024-06-28 03:16:21,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 03:16:21,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 03:16:21,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 203 transitions. [2024-06-28 03:16:21,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42917547568710357 [2024-06-28 03:16:21,539 INFO L175 Difference]: Start difference. First operand has 390 places, 905 transitions, 18943 flow. Second operand 11 states and 203 transitions. [2024-06-28 03:16:21,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 962 transitions, 21874 flow [2024-06-28 03:16:25,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 962 transitions, 21309 flow, removed 98 selfloop flow, removed 8 redundant places. [2024-06-28 03:16:25,435 INFO L231 Difference]: Finished difference. Result has 395 places, 928 transitions, 19121 flow [2024-06-28 03:16:25,436 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=18385, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=905, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=758, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=19121, PETRI_PLACES=395, PETRI_TRANSITIONS=928} [2024-06-28 03:16:25,436 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 351 predicate places. [2024-06-28 03:16:25,436 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 928 transitions, 19121 flow [2024-06-28 03:16:25,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:16:25,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:16:25,437 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:16:25,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-28 03:16:25,437 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:16:25,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:16:25,437 INFO L85 PathProgramCache]: Analyzing trace with hash -379204824, now seen corresponding path program 5 times [2024-06-28 03:16:25,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:16:25,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45887950] [2024-06-28 03:16:25,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:16:25,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:16:25,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:16:26,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:16:26,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:16:26,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45887950] [2024-06-28 03:16:26,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45887950] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:16:26,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:16:26,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:16:26,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923191775] [2024-06-28 03:16:26,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:16:26,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:16:26,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:16:26,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:16:26,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:16:26,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-28 03:16:26,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 928 transitions, 19121 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:16:26,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:16:26,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-28 03:16:26,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:16:29,858 INFO L124 PetriNetUnfolderBase]: 5668/8507 cut-off events. [2024-06-28 03:16:29,859 INFO L125 PetriNetUnfolderBase]: For 1540816/1540820 co-relation queries the response was YES. [2024-06-28 03:16:29,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110903 conditions, 8507 events. 5668/8507 cut-off events. For 1540816/1540820 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 48352 event pairs, 774 based on Foata normal form. 10/8513 useless extension candidates. Maximal degree in co-relation 110728. Up to 7646 conditions per place. [2024-06-28 03:16:30,004 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 813 selfloop transitions, 161 changer transitions 0/978 dead transitions. [2024-06-28 03:16:30,004 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 978 transitions, 21992 flow [2024-06-28 03:16:30,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 03:16:30,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 03:16:30,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 204 transitions. [2024-06-28 03:16:30,006 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312896405919662 [2024-06-28 03:16:30,006 INFO L175 Difference]: Start difference. First operand has 395 places, 928 transitions, 19121 flow. Second operand 11 states and 204 transitions. [2024-06-28 03:16:30,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 978 transitions, 21992 flow [2024-06-28 03:16:34,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 978 transitions, 21522 flow, removed 105 selfloop flow, removed 7 redundant places. [2024-06-28 03:16:34,209 INFO L231 Difference]: Finished difference. Result has 400 places, 943 transitions, 19296 flow [2024-06-28 03:16:34,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=18651, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=928, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=767, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=19296, PETRI_PLACES=400, PETRI_TRANSITIONS=943} [2024-06-28 03:16:34,210 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 356 predicate places. [2024-06-28 03:16:34,210 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 943 transitions, 19296 flow [2024-06-28 03:16:34,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:16:34,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:16:34,211 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:16:34,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-28 03:16:34,211 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)] === [2024-06-28 03:16:34,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:16:34,211 INFO L85 PathProgramCache]: Analyzing trace with hash -398507498, now seen corresponding path program 1 times [2024-06-28 03:16:34,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:16:34,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816592845] [2024-06-28 03:16:34,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:16:34,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:16:34,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:16:34,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:16:34,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:16:34,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816592845] [2024-06-28 03:16:34,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816592845] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:16:34,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:16:34,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:16:34,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084996513] [2024-06-28 03:16:34,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:16:34,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:16:34,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:16:34,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:16:34,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:16:35,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-28 03:16:35,014 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 943 transitions, 19296 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:16:35,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:16:35,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-28 03:16:35,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:16:38,125 INFO L124 PetriNetUnfolderBase]: 5674/8526 cut-off events. [2024-06-28 03:16:38,125 INFO L125 PetriNetUnfolderBase]: For 1557119/1557121 co-relation queries the response was YES. [2024-06-28 03:16:38,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111270 conditions, 8526 events. 5674/8526 cut-off events. For 1557119/1557121 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 48616 event pairs, 918 based on Foata normal form. 8/8532 useless extension candidates. Maximal degree in co-relation 111093. Up to 8145 conditions per place. [2024-06-28 03:16:38,283 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 895 selfloop transitions, 73 changer transitions 0/972 dead transitions. [2024-06-28 03:16:38,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 972 transitions, 21785 flow [2024-06-28 03:16:38,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:16:38,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:16:38,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-28 03:16:38,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43521594684385384 [2024-06-28 03:16:38,284 INFO L175 Difference]: Start difference. First operand has 400 places, 943 transitions, 19296 flow. Second operand 7 states and 131 transitions. [2024-06-28 03:16:38,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 972 transitions, 21785 flow [2024-06-28 03:16:42,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 972 transitions, 21267 flow, removed 131 selfloop flow, removed 7 redundant places. [2024-06-28 03:16:42,433 INFO L231 Difference]: Finished difference. Result has 400 places, 952 transitions, 19249 flow [2024-06-28 03:16:42,434 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=18794, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=943, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=879, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=19249, PETRI_PLACES=400, PETRI_TRANSITIONS=952} [2024-06-28 03:16:42,434 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 356 predicate places. [2024-06-28 03:16:42,434 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 952 transitions, 19249 flow [2024-06-28 03:16:42,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:16:42,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:16:42,435 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:16:42,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-28 03:16:42,435 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)] === [2024-06-28 03:16:42,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:16:42,435 INFO L85 PathProgramCache]: Analyzing trace with hash -398149014, now seen corresponding path program 1 times [2024-06-28 03:16:42,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:16:42,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456253795] [2024-06-28 03:16:42,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:16:42,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:16:42,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:16:43,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:16:43,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:16:43,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456253795] [2024-06-28 03:16:43,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456253795] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:16:43,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:16:43,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:16:43,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690451510] [2024-06-28 03:16:43,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:16:43,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:16:43,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:16:43,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:16:43,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:16:43,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-28 03:16:43,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 952 transitions, 19249 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) [2024-06-28 03:16:43,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:16:43,272 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-28 03:16:43,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:16:46,022 INFO L124 PetriNetUnfolderBase]: 5429/8254 cut-off events. [2024-06-28 03:16:46,023 INFO L125 PetriNetUnfolderBase]: For 1552471/1552504 co-relation queries the response was YES. [2024-06-28 03:16:46,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107869 conditions, 8254 events. 5429/8254 cut-off events. For 1552471/1552504 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 47987 event pairs, 912 based on Foata normal form. 28/8262 useless extension candidates. Maximal degree in co-relation 107691. Up to 7482 conditions per place. [2024-06-28 03:16:46,158 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 861 selfloop transitions, 37 changer transitions 0/976 dead transitions. [2024-06-28 03:16:46,158 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 976 transitions, 21379 flow [2024-06-28 03:16:46,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:16:46,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:16:46,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-28 03:16:46,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43853820598006643 [2024-06-28 03:16:46,159 INFO L175 Difference]: Start difference. First operand has 400 places, 952 transitions, 19249 flow. Second operand 7 states and 132 transitions. [2024-06-28 03:16:46,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 976 transitions, 21379 flow [2024-06-28 03:16:50,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 976 transitions, 21215 flow, removed 39 selfloop flow, removed 4 redundant places. [2024-06-28 03:16:50,435 INFO L231 Difference]: Finished difference. Result has 404 places, 961 transitions, 19288 flow [2024-06-28 03:16:50,436 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=19085, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=952, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=919, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=19288, PETRI_PLACES=404, PETRI_TRANSITIONS=961} [2024-06-28 03:16:50,436 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 360 predicate places. [2024-06-28 03:16:50,436 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 961 transitions, 19288 flow [2024-06-28 03:16:50,436 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) [2024-06-28 03:16:50,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:16:50,437 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:16:50,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-28 03:16:50,437 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)] === [2024-06-28 03:16:50,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:16:50,438 INFO L85 PathProgramCache]: Analyzing trace with hash -962719490, now seen corresponding path program 2 times [2024-06-28 03:16:50,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:16:50,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568431581] [2024-06-28 03:16:50,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:16:50,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:16:50,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:16:51,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:16:51,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:16:51,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568431581] [2024-06-28 03:16:51,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568431581] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:16:51,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:16:51,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:16:51,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968272939] [2024-06-28 03:16:51,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:16:51,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:16:51,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:16:51,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:16:51,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:16:51,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-28 03:16:51,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 961 transitions, 19288 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:16:51,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:16:51,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-28 03:16:51,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:16:54,256 INFO L124 PetriNetUnfolderBase]: 5678/8527 cut-off events. [2024-06-28 03:16:54,256 INFO L125 PetriNetUnfolderBase]: For 1584071/1584075 co-relation queries the response was YES. [2024-06-28 03:16:54,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110954 conditions, 8527 events. 5678/8527 cut-off events. For 1584071/1584075 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 48466 event pairs, 805 based on Foata normal form. 7/8532 useless extension candidates. Maximal degree in co-relation 110774. Up to 8152 conditions per place. [2024-06-28 03:16:54,410 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 901 selfloop transitions, 74 changer transitions 0/979 dead transitions. [2024-06-28 03:16:54,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 979 transitions, 21569 flow [2024-06-28 03:16:54,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:16:54,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:16:54,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-28 03:16:54,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-28 03:16:54,411 INFO L175 Difference]: Start difference. First operand has 404 places, 961 transitions, 19288 flow. Second operand 7 states and 126 transitions. [2024-06-28 03:16:54,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 979 transitions, 21569 flow [2024-06-28 03:16:58,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 979 transitions, 21475 flow, removed 40 selfloop flow, removed 2 redundant places. [2024-06-28 03:16:58,445 INFO L231 Difference]: Finished difference. Result has 409 places, 964 transitions, 19453 flow [2024-06-28 03:16:58,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=19194, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=961, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=890, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=19453, PETRI_PLACES=409, PETRI_TRANSITIONS=964} [2024-06-28 03:16:58,446 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 365 predicate places. [2024-06-28 03:16:58,446 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 964 transitions, 19453 flow [2024-06-28 03:16:58,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:16:58,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:16:58,446 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:16:58,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-28 03:16:58,447 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:16:58,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:16:58,447 INFO L85 PathProgramCache]: Analyzing trace with hash 1297223085, now seen corresponding path program 8 times [2024-06-28 03:16:58,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:16:58,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331399649] [2024-06-28 03:16:58,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:16:58,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:16:58,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:16:59,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:16:59,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:16:59,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331399649] [2024-06-28 03:16:59,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331399649] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:16:59,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:16:59,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:16:59,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133275878] [2024-06-28 03:16:59,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:16:59,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:16:59,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:16:59,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:16:59,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:16:59,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-28 03:16:59,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 964 transitions, 19453 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:16:59,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:16:59,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-28 03:16:59,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:17:02,417 INFO L124 PetriNetUnfolderBase]: 5696/8586 cut-off events. [2024-06-28 03:17:02,417 INFO L125 PetriNetUnfolderBase]: For 1621345/1621353 co-relation queries the response was YES. [2024-06-28 03:17:02,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111932 conditions, 8586 events. 5696/8586 cut-off events. For 1621345/1621353 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 49255 event pairs, 708 based on Foata normal form. 11/8591 useless extension candidates. Maximal degree in co-relation 111749. Up to 6824 conditions per place. [2024-06-28 03:17:02,562 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 767 selfloop transitions, 262 changer transitions 0/1033 dead transitions. [2024-06-28 03:17:02,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 1033 transitions, 22945 flow [2024-06-28 03:17:02,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:17:02,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:17:02,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 195 transitions. [2024-06-28 03:17:02,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45348837209302323 [2024-06-28 03:17:02,564 INFO L175 Difference]: Start difference. First operand has 409 places, 964 transitions, 19453 flow. Second operand 10 states and 195 transitions. [2024-06-28 03:17:02,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 1033 transitions, 22945 flow [2024-06-28 03:17:06,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 1033 transitions, 22812 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-28 03:17:06,243 INFO L231 Difference]: Finished difference. Result has 418 places, 985 transitions, 20391 flow [2024-06-28 03:17:06,244 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=19320, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=964, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=242, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=705, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=20391, PETRI_PLACES=418, PETRI_TRANSITIONS=985} [2024-06-28 03:17:06,244 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 374 predicate places. [2024-06-28 03:17:06,244 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 985 transitions, 20391 flow [2024-06-28 03:17:06,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:17:06,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:17:06,244 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:17:06,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-28 03:17:06,245 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:17:06,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:17:06,245 INFO L85 PathProgramCache]: Analyzing trace with hash 526752543, now seen corresponding path program 9 times [2024-06-28 03:17:06,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:17:06,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003511436] [2024-06-28 03:17:06,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:17:06,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:17:06,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:17:07,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:17:07,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:17:07,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003511436] [2024-06-28 03:17:07,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003511436] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:17:07,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:17:07,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:17:07,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489072650] [2024-06-28 03:17:07,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:17:07,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:17:07,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:17:07,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:17:07,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:17:07,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-28 03:17:07,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 985 transitions, 20391 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:17:07,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:17:07,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-28 03:17:07,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:17:10,386 INFO L124 PetriNetUnfolderBase]: 5780/8677 cut-off events. [2024-06-28 03:17:10,386 INFO L125 PetriNetUnfolderBase]: For 1721590/1721598 co-relation queries the response was YES. [2024-06-28 03:17:10,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117011 conditions, 8677 events. 5780/8677 cut-off events. For 1721590/1721598 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 49390 event pairs, 758 based on Foata normal form. 14/8686 useless extension candidates. Maximal degree in co-relation 116824. Up to 6139 conditions per place. [2024-06-28 03:17:10,695 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 628 selfloop transitions, 403 changer transitions 0/1035 dead transitions. [2024-06-28 03:17:10,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 1035 transitions, 24257 flow [2024-06-28 03:17:10,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 03:17:10,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 03:17:10,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 221 transitions. [2024-06-28 03:17:10,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46723044397463004 [2024-06-28 03:17:10,697 INFO L175 Difference]: Start difference. First operand has 418 places, 985 transitions, 20391 flow. Second operand 11 states and 221 transitions. [2024-06-28 03:17:10,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 1035 transitions, 24257 flow [2024-06-28 03:17:14,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 1035 transitions, 23710 flow, removed 136 selfloop flow, removed 4 redundant places. [2024-06-28 03:17:14,589 INFO L231 Difference]: Finished difference. Result has 425 places, 995 transitions, 21240 flow [2024-06-28 03:17:14,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=19844, PETRI_DIFFERENCE_MINUEND_PLACES=414, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=985, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=398, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=587, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=21240, PETRI_PLACES=425, PETRI_TRANSITIONS=995} [2024-06-28 03:17:14,590 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 381 predicate places. [2024-06-28 03:17:14,590 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 995 transitions, 21240 flow [2024-06-28 03:17:14,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:17:14,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:17:14,590 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:17:14,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-28 03:17:14,591 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:17:14,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:17:14,591 INFO L85 PathProgramCache]: Analyzing trace with hash 1297230804, now seen corresponding path program 6 times [2024-06-28 03:17:14,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:17:14,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048354764] [2024-06-28 03:17:14,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:17:14,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:17:14,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:17:15,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:17:15,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:17:15,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048354764] [2024-06-28 03:17:15,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048354764] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:17:15,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:17:15,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:17:15,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575279547] [2024-06-28 03:17:15,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:17:15,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:17:15,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:17:15,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:17:15,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:17:15,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-28 03:17:15,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 995 transitions, 21240 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:17:15,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:17:15,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-28 03:17:15,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:17:18,679 INFO L124 PetriNetUnfolderBase]: 5808/8712 cut-off events. [2024-06-28 03:17:18,679 INFO L125 PetriNetUnfolderBase]: For 1773140/1773146 co-relation queries the response was YES. [2024-06-28 03:17:18,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119888 conditions, 8712 events. 5808/8712 cut-off events. For 1773140/1773146 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 49624 event pairs, 794 based on Foata normal form. 12/8720 useless extension candidates. Maximal degree in co-relation 119699. Up to 7748 conditions per place. [2024-06-28 03:17:18,982 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 844 selfloop transitions, 185 changer transitions 0/1033 dead transitions. [2024-06-28 03:17:18,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 1033 transitions, 24410 flow [2024-06-28 03:17:18,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:17:18,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:17:18,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 191 transitions. [2024-06-28 03:17:18,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4441860465116279 [2024-06-28 03:17:18,989 INFO L175 Difference]: Start difference. First operand has 425 places, 995 transitions, 21240 flow. Second operand 10 states and 191 transitions. [2024-06-28 03:17:18,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 1033 transitions, 24410 flow [2024-06-28 03:17:23,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 1033 transitions, 23310 flow, removed 165 selfloop flow, removed 8 redundant places. [2024-06-28 03:17:23,655 INFO L231 Difference]: Finished difference. Result has 427 places, 998 transitions, 20752 flow [2024-06-28 03:17:23,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=20142, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=995, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=810, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=20752, PETRI_PLACES=427, PETRI_TRANSITIONS=998} [2024-06-28 03:17:23,656 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 383 predicate places. [2024-06-28 03:17:23,656 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 998 transitions, 20752 flow [2024-06-28 03:17:23,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:17:23,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:17:23,656 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:17:23,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-28 03:17:23,656 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:17:23,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:17:23,657 INFO L85 PathProgramCache]: Analyzing trace with hash 1297021275, now seen corresponding path program 10 times [2024-06-28 03:17:23,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:17:23,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549235361] [2024-06-28 03:17:23,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:17:23,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:17:23,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:17:24,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:17:24,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:17:24,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549235361] [2024-06-28 03:17:24,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549235361] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:17:24,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:17:24,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:17:24,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755525753] [2024-06-28 03:17:24,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:17:24,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:17:24,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:17:24,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:17:24,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:17:24,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-28 03:17:24,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 998 transitions, 20752 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:17:24,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:17:24,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-28 03:17:24,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:17:27,786 INFO L124 PetriNetUnfolderBase]: 5802/8741 cut-off events. [2024-06-28 03:17:27,786 INFO L125 PetriNetUnfolderBase]: For 1758291/1758299 co-relation queries the response was YES. [2024-06-28 03:17:27,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117919 conditions, 8741 events. 5802/8741 cut-off events. For 1758291/1758299 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 50265 event pairs, 705 based on Foata normal form. 11/8747 useless extension candidates. Maximal degree in co-relation 117729. Up to 6980 conditions per place. [2024-06-28 03:17:28,095 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 784 selfloop transitions, 262 changer transitions 0/1050 dead transitions. [2024-06-28 03:17:28,095 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 1050 transitions, 24223 flow [2024-06-28 03:17:28,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:17:28,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:17:28,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 195 transitions. [2024-06-28 03:17:28,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45348837209302323 [2024-06-28 03:17:28,096 INFO L175 Difference]: Start difference. First operand has 427 places, 998 transitions, 20752 flow. Second operand 10 states and 195 transitions. [2024-06-28 03:17:28,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 1050 transitions, 24223 flow [2024-06-28 03:17:32,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 1050 transitions, 23620 flow, removed 110 selfloop flow, removed 9 redundant places. [2024-06-28 03:17:32,775 INFO L231 Difference]: Finished difference. Result has 428 places, 1001 transitions, 20884 flow [2024-06-28 03:17:32,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=20149, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=998, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=259, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=736, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=20884, PETRI_PLACES=428, PETRI_TRANSITIONS=1001} [2024-06-28 03:17:32,776 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 384 predicate places. [2024-06-28 03:17:32,777 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 1001 transitions, 20884 flow [2024-06-28 03:17:32,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:17:32,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:17:32,777 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:17:32,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-28 03:17:32,777 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:17:32,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:17:32,778 INFO L85 PathProgramCache]: Analyzing trace with hash -563920793, now seen corresponding path program 11 times [2024-06-28 03:17:32,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:17:32,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734749723] [2024-06-28 03:17:32,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:17:32,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:17:32,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:17:33,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:17:33,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:17:33,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734749723] [2024-06-28 03:17:33,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734749723] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:17:33,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:17:33,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:17:33,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839224272] [2024-06-28 03:17:33,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:17:33,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:17:33,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:17:33,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:17:33,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:17:33,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-28 03:17:33,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 1001 transitions, 20884 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:17:33,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:17:33,851 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-28 03:17:33,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:17:36,817 INFO L124 PetriNetUnfolderBase]: 5844/8801 cut-off events. [2024-06-28 03:17:36,818 INFO L125 PetriNetUnfolderBase]: For 1807343/1807351 co-relation queries the response was YES. [2024-06-28 03:17:36,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119627 conditions, 8801 events. 5844/8801 cut-off events. For 1807343/1807351 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 50657 event pairs, 705 based on Foata normal form. 11/8807 useless extension candidates. Maximal degree in co-relation 119436. Up to 6925 conditions per place. [2024-06-28 03:17:37,136 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 765 selfloop transitions, 293 changer transitions 0/1062 dead transitions. [2024-06-28 03:17:37,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 1062 transitions, 24723 flow [2024-06-28 03:17:37,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:17:37,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:17:37,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 199 transitions. [2024-06-28 03:17:37,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4627906976744186 [2024-06-28 03:17:37,138 INFO L175 Difference]: Start difference. First operand has 428 places, 1001 transitions, 20884 flow. Second operand 10 states and 199 transitions. [2024-06-28 03:17:37,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 1062 transitions, 24723 flow [2024-06-28 03:17:41,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 1062 transitions, 24023 flow, removed 96 selfloop flow, removed 7 redundant places. [2024-06-28 03:17:41,229 INFO L231 Difference]: Finished difference. Result has 433 places, 1014 transitions, 21408 flow [2024-06-28 03:17:41,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=20185, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1001, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=284, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=713, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=21408, PETRI_PLACES=433, PETRI_TRANSITIONS=1014} [2024-06-28 03:17:41,229 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 389 predicate places. [2024-06-28 03:17:41,230 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 1014 transitions, 21408 flow [2024-06-28 03:17:41,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:17:41,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:17:41,230 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:17:41,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-28 03:17:41,230 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:17:41,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:17:41,231 INFO L85 PathProgramCache]: Analyzing trace with hash 796041118, now seen corresponding path program 7 times [2024-06-28 03:17:41,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:17:41,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148044730] [2024-06-28 03:17:41,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:17:41,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:17:41,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:17:42,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:17:42,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:17:42,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148044730] [2024-06-28 03:17:42,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148044730] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:17:42,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:17:42,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:17:42,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485189920] [2024-06-28 03:17:42,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:17:42,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:17:42,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:17:42,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:17:42,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:17:42,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-28 03:17:42,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 1014 transitions, 21408 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:17:42,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:17:42,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-28 03:17:42,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:17:45,785 INFO L124 PetriNetUnfolderBase]: 5869/8803 cut-off events. [2024-06-28 03:17:45,785 INFO L125 PetriNetUnfolderBase]: For 1865520/1865526 co-relation queries the response was YES. [2024-06-28 03:17:45,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121197 conditions, 8803 events. 5869/8803 cut-off events. For 1865520/1865526 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 50209 event pairs, 798 based on Foata normal form. 12/8811 useless extension candidates. Maximal degree in co-relation 121003. Up to 7542 conditions per place.