./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.2024-05-21_14-57-05.files/protection/mix024_power.opt_pso.opt_rmo.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 76401ed0 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.2024-05-21_14-57-05.files/protection/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-76401ed-m [2024-06-20 16:04:08,450 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-20 16:04:08,523 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-20 16:04:08,527 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-20 16:04:08,528 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-20 16:04:08,549 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-20 16:04:08,550 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-20 16:04:08,551 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-20 16:04:08,551 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-20 16:04:08,554 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-20 16:04:08,555 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-20 16:04:08,555 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-20 16:04:08,555 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-20 16:04:08,556 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-20 16:04:08,557 INFO L153 SettingsManager]: * Use SBE=true [2024-06-20 16:04:08,557 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-20 16:04:08,557 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-20 16:04:08,557 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-20 16:04:08,558 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-20 16:04:08,558 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-20 16:04:08,558 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-20 16:04:08,558 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-20 16:04:08,559 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-20 16:04:08,559 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-20 16:04:08,559 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-20 16:04:08,559 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-20 16:04:08,559 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-20 16:04:08,560 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-20 16:04:08,560 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-20 16:04:08,560 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-20 16:04:08,561 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-20 16:04:08,561 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-20 16:04:08,562 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 16:04:08,562 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-20 16:04:08,562 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-20 16:04:08,562 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-20 16:04:08,562 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-20 16:04:08,563 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-20 16:04:08,563 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-20 16:04:08,563 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-20 16:04:08,563 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-20 16:04:08,563 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-20 16:04:08,564 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-20 16:04:08,564 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-20 16:04:08,742 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-20 16:04:08,758 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-20 16:04:08,760 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-20 16:04:08,760 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-20 16:04:08,761 INFO L274 PluginConnector]: CDTParser initialized [2024-06-20 16:04:08,761 INFO L431 ainManager$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 [2024-06-20 16:04:09,845 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-20 16:04:10,034 INFO L384 CDTParser]: Found 1 translation units. [2024-06-20 16:04:10,046 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix024_power.opt_pso.opt_rmo.opt.i [2024-06-20 16:04:10,057 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/21d210652/fcb0a5aa250544969d6b95275134c540/FLAGabb6c05de [2024-06-20 16:04:10,078 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/21d210652/fcb0a5aa250544969d6b95275134c540 [2024-06-20 16:04:10,080 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-20 16:04:10,081 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-20 16:04:10,081 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix024_power.opt_pso.opt_rmo.opt.yml/witness.yml [2024-06-20 16:04:10,247 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-20 16:04:10,248 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-20 16:04:10,248 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-20 16:04:10,249 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-20 16:04:10,252 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-20 16:04:10,253 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 04:04:10" (1/2) ... [2024-06-20 16:04:10,253 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4973c514 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:04:10, skipping insertion in model container [2024-06-20 16:04:10,254 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 04:04:10" (1/2) ... [2024-06-20 16:04:10,255 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@624925a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:04:10, skipping insertion in model container [2024-06-20 16:04:10,255 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 04:04:10" (2/2) ... [2024-06-20 16:04:10,255 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4973c514 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:04:10, skipping insertion in model container [2024-06-20 16:04:10,255 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 04:04:10" (2/2) ... [2024-06-20 16:04:10,256 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-20 16:04:10,332 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-20 16:04:10,333 INFO L97 edCorrectnessWitness]: Location invariant before [L847-L847] ((((((((((((((((((((! multithreaded || y$read_delayed == (_Bool)0) && (! multithreaded || ((0 <= y$w_buff1 && y$w_buff1 <= 1) && (y$w_buff1 == 0 || y$w_buff1 == 1)))) && (! multithreaded || ((0 <= y$mem_tmp && y$mem_tmp <= 1) && (y$mem_tmp == 0 || y$mem_tmp == 1)))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= y$w_buff0 && y$w_buff0 <= 1) && (y$w_buff0 == 0 || y$w_buff0 == 1)))) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0) [2024-06-20 16:04:10,333 INFO L97 edCorrectnessWitness]: Location invariant before [L850-L850] ((((((((((((((((((((! multithreaded || y$read_delayed == (_Bool)0) && (! multithreaded || ((0 <= y$w_buff1 && y$w_buff1 <= 1) && (y$w_buff1 == 0 || y$w_buff1 == 1)))) && (! multithreaded || ((0 <= y$mem_tmp && y$mem_tmp <= 1) && (y$mem_tmp == 0 || y$mem_tmp == 1)))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= y$w_buff0 && y$w_buff0 <= 1) && (y$w_buff0 == 0 || y$w_buff0 == 1)))) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0) [2024-06-20 16:04:10,334 INFO L97 edCorrectnessWitness]: Location invariant before [L849-L849] ((((((((((((((((((((! multithreaded || y$read_delayed == (_Bool)0) && (! multithreaded || ((0 <= y$w_buff1 && y$w_buff1 <= 1) && (y$w_buff1 == 0 || y$w_buff1 == 1)))) && (! multithreaded || ((0 <= y$mem_tmp && y$mem_tmp <= 1) && (y$mem_tmp == 0 || y$mem_tmp == 1)))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= y$w_buff0 && y$w_buff0 <= 1) && (y$w_buff0 == 0 || y$w_buff0 == 1)))) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0) [2024-06-20 16:04:10,334 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-20 16:04:10,334 INFO L106 edCorrectnessWitness]: ghost_update [L845-L845] multithreaded = 1; [2024-06-20 16:04:10,433 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-20 16:04:10,708 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 16:04:10,720 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-20 16:04:10,814 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 16:04:10,867 INFO L206 MainTranslator]: Completed translation [2024-06-20 16:04:10,868 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:04:10 WrapperNode [2024-06-20 16:04:10,868 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-20 16:04:10,870 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-20 16:04:10,870 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-20 16:04:10,870 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-20 16:04:10,875 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:04:10" (1/1) ... [2024-06-20 16:04:10,904 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:04:10" (1/1) ... [2024-06-20 16:04:10,936 INFO L138 Inliner]: procedures = 175, calls = 49, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 128 [2024-06-20 16:04:10,940 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-20 16:04:10,941 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-20 16:04:10,941 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-20 16:04:10,941 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-20 16:04:10,950 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:04:10" (1/1) ... [2024-06-20 16:04:10,950 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:04:10" (1/1) ... [2024-06-20 16:04:10,965 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:04:10" (1/1) ... [2024-06-20 16:04:10,982 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]. [2024-06-20 16:04:10,984 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:04:10" (1/1) ... [2024-06-20 16:04:10,984 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:04:10" (1/1) ... [2024-06-20 16:04:10,996 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:04:10" (1/1) ... [2024-06-20 16:04:11,006 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:04:10" (1/1) ... [2024-06-20 16:04:11,008 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:04:10" (1/1) ... [2024-06-20 16:04:11,013 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:04:10" (1/1) ... [2024-06-20 16:04:11,016 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-20 16:04:11,018 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-20 16:04:11,018 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-20 16:04:11,018 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-20 16:04:11,018 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:04:10" (1/1) ... [2024-06-20 16:04:11,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 16:04:11,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-20 16:04:11,042 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) [2024-06-20 16:04:11,068 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 [2024-06-20 16:04:11,086 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-20 16:04:11,086 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-20 16:04:11,086 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-20 16:04:11,087 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-20 16:04:11,087 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-20 16:04:11,087 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-20 16:04:11,087 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-20 16:04:11,087 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-20 16:04:11,088 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-20 16:04:11,088 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-20 16:04:11,088 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-20 16:04:11,088 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-20 16:04:11,089 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-20 16:04:11,186 INFO L244 CfgBuilder]: Building ICFG [2024-06-20 16:04:11,188 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-20 16:04:11,530 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-20 16:04:11,530 INFO L293 CfgBuilder]: Performing block encoding [2024-06-20 16:04:11,636 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-20 16:04:11,637 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-20 16:04:11,637 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 04:04:11 BoogieIcfgContainer [2024-06-20 16:04:11,637 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-20 16:04:11,639 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-20 16:04:11,639 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-20 16:04:11,641 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-20 16:04:11,641 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.06 04:04:10" (1/4) ... [2024-06-20 16:04:11,642 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@366b9f28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.06 04:04:11, skipping insertion in model container [2024-06-20 16:04:11,642 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 04:04:10" (2/4) ... [2024-06-20 16:04:11,642 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@366b9f28 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 04:04:11, skipping insertion in model container [2024-06-20 16:04:11,642 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:04:10" (3/4) ... [2024-06-20 16:04:11,642 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@366b9f28 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 04:04:11, skipping insertion in model container [2024-06-20 16:04:11,642 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 04:04:11" (4/4) ... [2024-06-20 16:04:11,643 INFO L112 eAbstractionObserver]: Analyzing ICFG mix024_power.opt_pso.opt_rmo.opt.i [2024-06-20 16:04:11,655 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-20 16:04:11,655 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-20 16:04:11,656 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-20 16:04:11,688 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-20 16:04:11,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 53 places, 43 transitions, 98 flow [2024-06-20 16:04:11,730 INFO L124 PetriNetUnfolderBase]: 0/40 cut-off events. [2024-06-20 16:04:11,730 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 16:04:11,732 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. [2024-06-20 16:04:11,732 INFO L82 GeneralOperation]: Start removeDead. Operand has 53 places, 43 transitions, 98 flow [2024-06-20 16:04:11,734 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 34 transitions, 77 flow [2024-06-20 16:04:11,741 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-20 16:04:11,745 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;@17b58416, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-20 16:04:11,745 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-20 16:04:11,748 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-20 16:04:11,748 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-20 16:04:11,748 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 16:04:11,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:04:11,749 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-20 16:04:11,749 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)] === [2024-06-20 16:04:11,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:04:11,753 INFO L85 PathProgramCache]: Analyzing trace with hash 372387487, now seen corresponding path program 1 times [2024-06-20 16:04:11,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:04:11,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272585035] [2024-06-20 16:04:11,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:04:11,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:04:11,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:04:12,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:04:12,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:04:12,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272585035] [2024-06-20 16:04:12,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272585035] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:04:12,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:04:12,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-20 16:04:12,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682749405] [2024-06-20 16:04:12,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:04:12,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-20 16:04:12,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:04:12,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-20 16:04:12,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-20 16:04:12,756 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 43 [2024-06-20 16:04:12,758 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) [2024-06-20 16:04:12,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:04:12,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 43 [2024-06-20 16:04:12,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:04:13,082 INFO L124 PetriNetUnfolderBase]: 1407/2253 cut-off events. [2024-06-20 16:04:13,082 INFO L125 PetriNetUnfolderBase]: For 41/41 co-relation queries the response was YES. [2024-06-20 16:04:13,088 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. [2024-06-20 16:04:13,098 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 32 selfloop transitions, 4 changer transitions 0/44 dead transitions. [2024-06-20 16:04:13,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 44 transitions, 175 flow [2024-06-20 16:04:13,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-20 16:04:13,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-20 16:04:13,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 81 transitions. [2024-06-20 16:04:13,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.627906976744186 [2024-06-20 16:04:13,108 INFO L175 Difference]: Start difference. First operand has 44 places, 34 transitions, 77 flow. Second operand 3 states and 81 transitions. [2024-06-20 16:04:13,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 44 transitions, 175 flow [2024-06-20 16:04:13,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 44 transitions, 170 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-20 16:04:13,114 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 104 flow [2024-06-20 16:04:13,115 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} [2024-06-20 16:04:13,117 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 0 predicate places. [2024-06-20 16:04:13,118 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 104 flow [2024-06-20 16:04:13,118 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) [2024-06-20 16:04:13,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:04:13,118 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:04:13,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-20 16:04:13,120 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)] === [2024-06-20 16:04:13,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:04:13,121 INFO L85 PathProgramCache]: Analyzing trace with hash 1382137662, now seen corresponding path program 1 times [2024-06-20 16:04:13,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:04:13,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965850538] [2024-06-20 16:04:13,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:04:13,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:04:13,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:04:13,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:04:13,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:04:13,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965850538] [2024-06-20 16:04:13,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965850538] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:04:13,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:04:13,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-20 16:04:13,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819915803] [2024-06-20 16:04:13,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:04:13,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-20 16:04:13,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:04:13,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-20 16:04:13,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-20 16:04:13,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2024-06-20 16:04:13,828 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) [2024-06-20 16:04:13,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:04:13,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2024-06-20 16:04:13,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:04:14,144 INFO L124 PetriNetUnfolderBase]: 1653/2544 cut-off events. [2024-06-20 16:04:14,145 INFO L125 PetriNetUnfolderBase]: For 463/463 co-relation queries the response was YES. [2024-06-20 16:04:14,147 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. [2024-06-20 16:04:14,156 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 40 selfloop transitions, 7 changer transitions 0/54 dead transitions. [2024-06-20 16:04:14,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 54 transitions, 244 flow [2024-06-20 16:04:14,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 16:04:14,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 16:04:14,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 102 transitions. [2024-06-20 16:04:14,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5930232558139535 [2024-06-20 16:04:14,159 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 104 flow. Second operand 4 states and 102 transitions. [2024-06-20 16:04:14,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 54 transitions, 244 flow [2024-06-20 16:04:14,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 54 transitions, 240 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-20 16:04:14,164 INFO L231 Difference]: Finished difference. Result has 47 places, 40 transitions, 140 flow [2024-06-20 16:04:14,165 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} [2024-06-20 16:04:14,165 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2024-06-20 16:04:14,165 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 40 transitions, 140 flow [2024-06-20 16:04:14,166 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) [2024-06-20 16:04:14,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:04:14,167 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:04:14,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-20 16:04:14,168 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)] === [2024-06-20 16:04:14,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:04:14,170 INFO L85 PathProgramCache]: Analyzing trace with hash -103403870, now seen corresponding path program 1 times [2024-06-20 16:04:14,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:04:14,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411216109] [2024-06-20 16:04:14,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:04:14,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:04:14,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:04:14,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:04:14,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:04:14,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411216109] [2024-06-20 16:04:14,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411216109] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:04:14,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:04:14,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 16:04:14,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86626565] [2024-06-20 16:04:14,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:04:14,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 16:04:14,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:04:14,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 16:04:14,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-20 16:04:14,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-20 16:04:14,887 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) [2024-06-20 16:04:14,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:04:14,888 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-20 16:04:14,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:04:15,257 INFO L124 PetriNetUnfolderBase]: 1947/2973 cut-off events. [2024-06-20 16:04:15,257 INFO L125 PetriNetUnfolderBase]: For 1495/1495 co-relation queries the response was YES. [2024-06-20 16:04:15,261 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. [2024-06-20 16:04:15,269 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 48 selfloop transitions, 10 changer transitions 0/64 dead transitions. [2024-06-20 16:04:15,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 64 transitions, 324 flow [2024-06-20 16:04:15,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 16:04:15,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 16:04:15,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 121 transitions. [2024-06-20 16:04:15,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5627906976744186 [2024-06-20 16:04:15,271 INFO L175 Difference]: Start difference. First operand has 47 places, 40 transitions, 140 flow. Second operand 5 states and 121 transitions. [2024-06-20 16:04:15,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 64 transitions, 324 flow [2024-06-20 16:04:15,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 64 transitions, 310 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-20 16:04:15,273 INFO L231 Difference]: Finished difference. Result has 50 places, 43 transitions, 176 flow [2024-06-20 16:04:15,273 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} [2024-06-20 16:04:15,274 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 6 predicate places. [2024-06-20 16:04:15,274 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 176 flow [2024-06-20 16:04:15,274 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) [2024-06-20 16:04:15,274 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:04:15,274 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:04:15,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-20 16:04:15,275 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)] === [2024-06-20 16:04:15,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:04:15,275 INFO L85 PathProgramCache]: Analyzing trace with hash 2086851605, now seen corresponding path program 1 times [2024-06-20 16:04:15,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:04:15,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761626271] [2024-06-20 16:04:15,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:04:15,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:04:15,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:04:15,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:04:15,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:04:15,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761626271] [2024-06-20 16:04:15,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761626271] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:04:15,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:04:15,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 16:04:15,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840527719] [2024-06-20 16:04:15,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:04:15,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 16:04:15,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:04:15,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 16:04:15,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 16:04:15,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-20 16:04:15,935 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) [2024-06-20 16:04:15,935 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:04:15,935 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-20 16:04:15,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:04:16,360 INFO L124 PetriNetUnfolderBase]: 1935/2939 cut-off events. [2024-06-20 16:04:16,361 INFO L125 PetriNetUnfolderBase]: For 2815/2815 co-relation queries the response was YES. [2024-06-20 16:04:16,364 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. [2024-06-20 16:04:16,373 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 56 selfloop transitions, 13 changer transitions 0/75 dead transitions. [2024-06-20 16:04:16,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 75 transitions, 406 flow [2024-06-20 16:04:16,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:04:16,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:04:16,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-20 16:04:16,376 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5581395348837209 [2024-06-20 16:04:16,376 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 176 flow. Second operand 6 states and 144 transitions. [2024-06-20 16:04:16,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 75 transitions, 406 flow [2024-06-20 16:04:16,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 75 transitions, 382 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-20 16:04:16,380 INFO L231 Difference]: Finished difference. Result has 53 places, 46 transitions, 212 flow [2024-06-20 16:04:16,380 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} [2024-06-20 16:04:16,381 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 9 predicate places. [2024-06-20 16:04:16,382 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 46 transitions, 212 flow [2024-06-20 16:04:16,382 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) [2024-06-20 16:04:16,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:04:16,382 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:04:16,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-20 16:04:16,382 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)] === [2024-06-20 16:04:16,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:04:16,383 INFO L85 PathProgramCache]: Analyzing trace with hash -1624971842, now seen corresponding path program 1 times [2024-06-20 16:04:16,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:04:16,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439119267] [2024-06-20 16:04:16,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:04:16,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:04:16,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:04:17,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:04:17,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:04:17,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439119267] [2024-06-20 16:04:17,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439119267] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:04:17,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:04:17,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 16:04:17,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301064152] [2024-06-20 16:04:17,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:04:17,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 16:04:17,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:04:17,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 16:04:17,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-20 16:04:17,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-20 16:04:17,150 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) [2024-06-20 16:04:17,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:04:17,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-20 16:04:17,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:04:17,466 INFO L124 PetriNetUnfolderBase]: 1556/2546 cut-off events. [2024-06-20 16:04:17,466 INFO L125 PetriNetUnfolderBase]: For 3635/3635 co-relation queries the response was YES. [2024-06-20 16:04:17,470 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. [2024-06-20 16:04:17,478 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 44 selfloop transitions, 8 changer transitions 0/60 dead transitions. [2024-06-20 16:04:17,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 60 transitions, 360 flow [2024-06-20 16:04:17,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 16:04:17,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 16:04:17,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 106 transitions. [2024-06-20 16:04:17,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4930232558139535 [2024-06-20 16:04:17,480 INFO L175 Difference]: Start difference. First operand has 53 places, 46 transitions, 212 flow. Second operand 5 states and 106 transitions. [2024-06-20 16:04:17,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 60 transitions, 360 flow [2024-06-20 16:04:17,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 60 transitions, 326 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-20 16:04:17,516 INFO L231 Difference]: Finished difference. Result has 54 places, 49 transitions, 224 flow [2024-06-20 16:04:17,516 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} [2024-06-20 16:04:17,518 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 10 predicate places. [2024-06-20 16:04:17,518 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 49 transitions, 224 flow [2024-06-20 16:04:17,518 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) [2024-06-20 16:04:17,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:04:17,519 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:04:17,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-20 16:04:17,519 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)] === [2024-06-20 16:04:17,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:04:17,519 INFO L85 PathProgramCache]: Analyzing trace with hash 1165481396, now seen corresponding path program 1 times [2024-06-20 16:04:17,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:04:17,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072156780] [2024-06-20 16:04:17,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:04:17,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:04:17,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:04:18,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:04:18,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:04:18,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072156780] [2024-06-20 16:04:18,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072156780] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:04:18,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:04:18,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:04:18,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485519895] [2024-06-20 16:04:18,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:04:18,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:04:18,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:04:18,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:04:18,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:04:18,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-20 16:04:18,371 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) [2024-06-20 16:04:18,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:04:18,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-20 16:04:18,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:04:18,821 INFO L124 PetriNetUnfolderBase]: 1842/2876 cut-off events. [2024-06-20 16:04:18,821 INFO L125 PetriNetUnfolderBase]: For 5868/5868 co-relation queries the response was YES. [2024-06-20 16:04:18,825 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. [2024-06-20 16:04:18,834 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 53 selfloop transitions, 17 changer transitions 0/77 dead transitions. [2024-06-20 16:04:18,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 77 transitions, 480 flow [2024-06-20 16:04:18,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:04:18,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:04:18,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 126 transitions. [2024-06-20 16:04:18,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4883720930232558 [2024-06-20 16:04:18,835 INFO L175 Difference]: Start difference. First operand has 54 places, 49 transitions, 224 flow. Second operand 6 states and 126 transitions. [2024-06-20 16:04:18,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 77 transitions, 480 flow [2024-06-20 16:04:18,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 77 transitions, 458 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-20 16:04:18,838 INFO L231 Difference]: Finished difference. Result has 59 places, 60 transitions, 327 flow [2024-06-20 16:04:18,838 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=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=327, PETRI_PLACES=59, PETRI_TRANSITIONS=60} [2024-06-20 16:04:18,839 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 15 predicate places. [2024-06-20 16:04:18,839 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 60 transitions, 327 flow [2024-06-20 16:04:18,839 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) [2024-06-20 16:04:18,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:04:18,839 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:04:18,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-20 16:04:18,840 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)] === [2024-06-20 16:04:18,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:04:18,840 INFO L85 PathProgramCache]: Analyzing trace with hash 1005910407, now seen corresponding path program 1 times [2024-06-20 16:04:18,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:04:18,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582197648] [2024-06-20 16:04:18,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:04:18,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:04:18,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:04:19,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:04:19,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:04:19,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582197648] [2024-06-20 16:04:19,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582197648] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:04:19,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:04:19,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:04:19,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117128622] [2024-06-20 16:04:19,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:04:19,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:04:19,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:04:19,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:04:19,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:04:19,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-20 16:04:19,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 60 transitions, 327 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) [2024-06-20 16:04:19,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:04:19,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-20 16:04:19,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:04:20,107 INFO L124 PetriNetUnfolderBase]: 1902/2982 cut-off events. [2024-06-20 16:04:20,108 INFO L125 PetriNetUnfolderBase]: For 9315/9325 co-relation queries the response was YES. [2024-06-20 16:04:20,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10393 conditions, 2982 events. 1902/2982 cut-off events. For 9315/9325 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 10371. Up to 2774 conditions per place. [2024-06-20 16:04:20,125 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 60 selfloop transitions, 11 changer transitions 0/81 dead transitions. [2024-06-20 16:04:20,125 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 81 transitions, 539 flow [2024-06-20 16:04:20,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:04:20,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:04:20,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 123 transitions. [2024-06-20 16:04:20,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47674418604651164 [2024-06-20 16:04:20,126 INFO L175 Difference]: Start difference. First operand has 59 places, 60 transitions, 327 flow. Second operand 6 states and 123 transitions. [2024-06-20 16:04:20,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 81 transitions, 539 flow [2024-06-20 16:04:20,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 81 transitions, 523 flow, removed 7 selfloop flow, removed 1 redundant places. [2024-06-20 16:04:20,132 INFO L231 Difference]: Finished difference. Result has 64 places, 63 transitions, 371 flow [2024-06-20 16:04:20,132 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=311, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=371, PETRI_PLACES=64, PETRI_TRANSITIONS=63} [2024-06-20 16:04:20,133 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 20 predicate places. [2024-06-20 16:04:20,133 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 63 transitions, 371 flow [2024-06-20 16:04:20,133 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) [2024-06-20 16:04:20,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:04:20,134 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:04:20,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-20 16:04:20,134 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)] === [2024-06-20 16:04:20,134 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:04:20,134 INFO L85 PathProgramCache]: Analyzing trace with hash 1770175965, now seen corresponding path program 2 times [2024-06-20 16:04:20,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:04:20,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271642262] [2024-06-20 16:04:20,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:04:20,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:04:20,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:04:20,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:04:20,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:04:20,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271642262] [2024-06-20 16:04:20,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271642262] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:04:20,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:04:20,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:04:20,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874425155] [2024-06-20 16:04:20,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:04:20,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:04:20,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:04:20,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:04:20,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:04:21,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-20 16:04:21,014 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 63 transitions, 371 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) [2024-06-20 16:04:21,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:04:21,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-20 16:04:21,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:04:21,409 INFO L124 PetriNetUnfolderBase]: 1897/2977 cut-off events. [2024-06-20 16:04:21,409 INFO L125 PetriNetUnfolderBase]: For 11997/12019 co-relation queries the response was YES. [2024-06-20 16:04:21,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11042 conditions, 2977 events. 1897/2977 cut-off events. For 11997/12019 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 15163 event pairs, 939 based on Foata normal form. 10/2973 useless extension candidates. Maximal degree in co-relation 11017. Up to 2749 conditions per place. [2024-06-20 16:04:21,423 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 55 selfloop transitions, 16 changer transitions 0/81 dead transitions. [2024-06-20 16:04:21,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 81 transitions, 581 flow [2024-06-20 16:04:21,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:04:21,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:04:21,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 122 transitions. [2024-06-20 16:04:21,425 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4728682170542636 [2024-06-20 16:04:21,425 INFO L175 Difference]: Start difference. First operand has 64 places, 63 transitions, 371 flow. Second operand 6 states and 122 transitions. [2024-06-20 16:04:21,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 81 transitions, 581 flow [2024-06-20 16:04:21,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 81 transitions, 545 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-20 16:04:21,431 INFO L231 Difference]: Finished difference. Result has 66 places, 66 transitions, 411 flow [2024-06-20 16:04:21,431 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=335, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=411, PETRI_PLACES=66, PETRI_TRANSITIONS=66} [2024-06-20 16:04:21,433 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 22 predicate places. [2024-06-20 16:04:21,433 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 66 transitions, 411 flow [2024-06-20 16:04:21,433 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) [2024-06-20 16:04:21,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:04:21,433 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:04:21,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-20 16:04:21,434 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)] === [2024-06-20 16:04:21,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:04:21,434 INFO L85 PathProgramCache]: Analyzing trace with hash 1327749694, now seen corresponding path program 1 times [2024-06-20 16:04:21,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:04:21,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024515917] [2024-06-20 16:04:21,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:04:21,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:04:21,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:04:22,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:04:22,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:04:22,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024515917] [2024-06-20 16:04:22,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024515917] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:04:22,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:04:22,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:04:22,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592339918] [2024-06-20 16:04:22,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:04:22,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:04:22,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:04:22,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:04:22,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:04:22,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-20 16:04:22,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 66 transitions, 411 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) [2024-06-20 16:04:22,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:04:22,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-20 16:04:22,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:04:23,108 INFO L124 PetriNetUnfolderBase]: 1997/3049 cut-off events. [2024-06-20 16:04:23,108 INFO L125 PetriNetUnfolderBase]: For 14849/14863 co-relation queries the response was YES. [2024-06-20 16:04:23,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11918 conditions, 3049 events. 1997/3049 cut-off events. For 14849/14863 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 15004 event pairs, 645 based on Foata normal form. 6/3028 useless extension candidates. Maximal degree in co-relation 11893. Up to 2843 conditions per place. [2024-06-20 16:04:23,121 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 83 selfloop transitions, 18 changer transitions 0/110 dead transitions. [2024-06-20 16:04:23,121 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 110 transitions, 745 flow [2024-06-20 16:04:23,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:04:23,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:04:23,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-20 16:04:23,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5319767441860465 [2024-06-20 16:04:23,123 INFO L175 Difference]: Start difference. First operand has 66 places, 66 transitions, 411 flow. Second operand 8 states and 183 transitions. [2024-06-20 16:04:23,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 110 transitions, 745 flow [2024-06-20 16:04:23,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 110 transitions, 693 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-20 16:04:23,131 INFO L231 Difference]: Finished difference. Result has 70 places, 70 transitions, 442 flow [2024-06-20 16:04:23,131 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=349, PETRI_DIFFERENCE_MINUEND_PLACES=61, 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=8, PETRI_FLOW=442, PETRI_PLACES=70, PETRI_TRANSITIONS=70} [2024-06-20 16:04:23,132 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 26 predicate places. [2024-06-20 16:04:23,132 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 70 transitions, 442 flow [2024-06-20 16:04:23,132 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) [2024-06-20 16:04:23,132 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:04:23,132 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:04:23,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-20 16:04:23,133 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)] === [2024-06-20 16:04:23,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:04:23,133 INFO L85 PathProgramCache]: Analyzing trace with hash 1770185885, now seen corresponding path program 1 times [2024-06-20 16:04:23,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:04:23,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792092285] [2024-06-20 16:04:23,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:04:23,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:04:23,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:04:24,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:04:24,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:04:24,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792092285] [2024-06-20 16:04:24,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792092285] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:04:24,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:04:24,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:04:24,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753212004] [2024-06-20 16:04:24,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:04:24,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:04:24,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:04:24,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:04:24,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:04:24,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-20 16:04:24,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 70 transitions, 442 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) [2024-06-20 16:04:24,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:04:24,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-20 16:04:24,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:04:24,665 INFO L124 PetriNetUnfolderBase]: 1832/2885 cut-off events. [2024-06-20 16:04:24,666 INFO L125 PetriNetUnfolderBase]: For 17584/17584 co-relation queries the response was YES. [2024-06-20 16:04:24,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11919 conditions, 2885 events. 1832/2885 cut-off events. For 17584/17584 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 14701 event pairs, 727 based on Foata normal form. 3/2886 useless extension candidates. Maximal degree in co-relation 11892. Up to 2668 conditions per place. [2024-06-20 16:04:24,683 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 67 selfloop transitions, 21 changer transitions 0/95 dead transitions. [2024-06-20 16:04:24,683 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 95 transitions, 740 flow [2024-06-20 16:04:24,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:04:24,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:04:24,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 144 transitions. [2024-06-20 16:04:24,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47840531561461797 [2024-06-20 16:04:24,685 INFO L175 Difference]: Start difference. First operand has 70 places, 70 transitions, 442 flow. Second operand 7 states and 144 transitions. [2024-06-20 16:04:24,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 95 transitions, 740 flow [2024-06-20 16:04:24,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 95 transitions, 683 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-20 16:04:24,694 INFO L231 Difference]: Finished difference. Result has 72 places, 74 transitions, 478 flow [2024-06-20 16:04:24,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=385, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=478, PETRI_PLACES=72, PETRI_TRANSITIONS=74} [2024-06-20 16:04:24,695 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 28 predicate places. [2024-06-20 16:04:24,697 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 74 transitions, 478 flow [2024-06-20 16:04:24,697 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) [2024-06-20 16:04:24,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:04:24,697 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:04:24,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-20 16:04:24,697 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)] === [2024-06-20 16:04:24,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:04:24,698 INFO L85 PathProgramCache]: Analyzing trace with hash -1195474085, now seen corresponding path program 1 times [2024-06-20 16:04:24,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:04:24,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680603269] [2024-06-20 16:04:24,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:04:24,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:04:24,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:04:25,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:04:25,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:04:25,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680603269] [2024-06-20 16:04:25,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680603269] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:04:25,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:04:25,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:04:25,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941020271] [2024-06-20 16:04:25,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:04:25,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:04:25,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:04:25,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:04:25,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:04:25,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 16:04:25,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 74 transitions, 478 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) [2024-06-20 16:04:25,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:04:25,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 16:04:25,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:04:26,010 INFO L124 PetriNetUnfolderBase]: 2058/3123 cut-off events. [2024-06-20 16:04:26,011 INFO L125 PetriNetUnfolderBase]: For 23439/23458 co-relation queries the response was YES. [2024-06-20 16:04:26,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13770 conditions, 3123 events. 2058/3123 cut-off events. For 23439/23458 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 15232 event pairs, 796 based on Foata normal form. 3/3100 useless extension candidates. Maximal degree in co-relation 13741. Up to 2953 conditions per place. [2024-06-20 16:04:26,035 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 79 selfloop transitions, 14 changer transitions 0/102 dead transitions. [2024-06-20 16:04:26,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 102 transitions, 764 flow [2024-06-20 16:04:26,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:04:26,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:04:26,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-20 16:04:26,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45514950166112955 [2024-06-20 16:04:26,037 INFO L175 Difference]: Start difference. First operand has 72 places, 74 transitions, 478 flow. Second operand 7 states and 137 transitions. [2024-06-20 16:04:26,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 102 transitions, 764 flow [2024-06-20 16:04:26,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 102 transitions, 701 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-20 16:04:26,047 INFO L231 Difference]: Finished difference. Result has 74 places, 77 transitions, 493 flow [2024-06-20 16:04:26,047 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=415, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=493, PETRI_PLACES=74, PETRI_TRANSITIONS=77} [2024-06-20 16:04:26,048 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 30 predicate places. [2024-06-20 16:04:26,048 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 77 transitions, 493 flow [2024-06-20 16:04:26,048 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) [2024-06-20 16:04:26,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:04:26,048 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:04:26,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-20 16:04:26,048 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)] === [2024-06-20 16:04:26,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:04:26,049 INFO L85 PathProgramCache]: Analyzing trace with hash -1195294595, now seen corresponding path program 2 times [2024-06-20 16:04:26,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:04:26,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439164384] [2024-06-20 16:04:26,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:04:26,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:04:26,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:04:26,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:04:26,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:04:26,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439164384] [2024-06-20 16:04:26,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439164384] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:04:26,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:04:26,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:04:26,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155402811] [2024-06-20 16:04:26,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:04:26,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:04:26,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:04:26,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:04:26,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:04:27,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 16:04:27,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 77 transitions, 493 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) [2024-06-20 16:04:27,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:04:27,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 16:04:27,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:04:27,470 INFO L124 PetriNetUnfolderBase]: 2069/3139 cut-off events. [2024-06-20 16:04:27,471 INFO L125 PetriNetUnfolderBase]: For 27781/27802 co-relation queries the response was YES. [2024-06-20 16:04:27,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14477 conditions, 3139 events. 2069/3139 cut-off events. For 27781/27802 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 15242 event pairs, 796 based on Foata normal form. 3/3116 useless extension candidates. Maximal degree in co-relation 14447. Up to 2951 conditions per place. [2024-06-20 16:04:27,488 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 74 selfloop transitions, 19 changer transitions 0/102 dead transitions. [2024-06-20 16:04:27,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 102 transitions, 777 flow [2024-06-20 16:04:27,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:04:27,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:04:27,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-20 16:04:27,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45182724252491696 [2024-06-20 16:04:27,490 INFO L175 Difference]: Start difference. First operand has 74 places, 77 transitions, 493 flow. Second operand 7 states and 136 transitions. [2024-06-20 16:04:27,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 102 transitions, 777 flow [2024-06-20 16:04:27,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 102 transitions, 723 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-20 16:04:27,500 INFO L231 Difference]: Finished difference. Result has 76 places, 80 transitions, 533 flow [2024-06-20 16:04:27,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=439, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=533, PETRI_PLACES=76, PETRI_TRANSITIONS=80} [2024-06-20 16:04:27,501 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 32 predicate places. [2024-06-20 16:04:27,501 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 80 transitions, 533 flow [2024-06-20 16:04:27,501 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) [2024-06-20 16:04:27,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:04:27,502 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:04:27,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-20 16:04:27,502 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)] === [2024-06-20 16:04:27,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:04:27,502 INFO L85 PathProgramCache]: Analyzing trace with hash 1118452491, now seen corresponding path program 1 times [2024-06-20 16:04:27,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:04:27,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491103507] [2024-06-20 16:04:27,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:04:27,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:04:27,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:04:28,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:04:28,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:04:28,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491103507] [2024-06-20 16:04:28,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491103507] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:04:28,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:04:28,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:04:28,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286784196] [2024-06-20 16:04:28,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:04:28,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:04:28,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:04:28,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:04:28,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:04:28,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 16:04:28,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 80 transitions, 533 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) [2024-06-20 16:04:28,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:04:28,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 16:04:28,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:04:28,885 INFO L124 PetriNetUnfolderBase]: 2172/3269 cut-off events. [2024-06-20 16:04:28,885 INFO L125 PetriNetUnfolderBase]: For 33405/33405 co-relation queries the response was YES. [2024-06-20 16:04:28,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15682 conditions, 3269 events. 2172/3269 cut-off events. For 33405/33405 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 15798 event pairs, 822 based on Foata normal form. 3/3270 useless extension candidates. Maximal degree in co-relation 15651. Up to 3134 conditions per place. [2024-06-20 16:04:28,904 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 86 selfloop transitions, 22 changer transitions 0/116 dead transitions. [2024-06-20 16:04:28,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 116 transitions, 987 flow [2024-06-20 16:04:28,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:04:28,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:04:28,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 142 transitions. [2024-06-20 16:04:28,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4717607973421927 [2024-06-20 16:04:28,906 INFO L175 Difference]: Start difference. First operand has 76 places, 80 transitions, 533 flow. Second operand 7 states and 142 transitions. [2024-06-20 16:04:28,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 116 transitions, 987 flow [2024-06-20 16:04:28,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 116 transitions, 917 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-20 16:04:28,919 INFO L231 Difference]: Finished difference. Result has 80 places, 91 transitions, 649 flow [2024-06-20 16:04:28,919 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=463, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=649, PETRI_PLACES=80, PETRI_TRANSITIONS=91} [2024-06-20 16:04:28,920 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 36 predicate places. [2024-06-20 16:04:28,920 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 91 transitions, 649 flow [2024-06-20 16:04:28,921 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) [2024-06-20 16:04:28,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:04:28,921 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:04:28,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-20 16:04:28,922 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)] === [2024-06-20 16:04:28,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:04:28,922 INFO L85 PathProgramCache]: Analyzing trace with hash -1188799227, now seen corresponding path program 2 times [2024-06-20 16:04:28,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:04:28,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633386647] [2024-06-20 16:04:28,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:04:28,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:04:28,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:04:29,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:04:29,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:04:29,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633386647] [2024-06-20 16:04:29,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633386647] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:04:29,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:04:29,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:04:29,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840723018] [2024-06-20 16:04:29,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:04:29,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:04:29,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:04:29,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:04:29,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:04:29,758 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 16:04:29,759 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 91 transitions, 649 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) [2024-06-20 16:04:29,759 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:04:29,759 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 16:04:29,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:04:30,264 INFO L124 PetriNetUnfolderBase]: 2198/3308 cut-off events. [2024-06-20 16:04:30,264 INFO L125 PetriNetUnfolderBase]: For 40993/41006 co-relation queries the response was YES. [2024-06-20 16:04:30,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17024 conditions, 3308 events. 2198/3308 cut-off events. For 40993/41006 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 16062 event pairs, 823 based on Foata normal form. 13/3318 useless extension candidates. Maximal degree in co-relation 16990. Up to 3083 conditions per place. [2024-06-20 16:04:30,287 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 76 selfloop transitions, 42 changer transitions 0/126 dead transitions. [2024-06-20 16:04:30,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 126 transitions, 1189 flow [2024-06-20 16:04:30,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:04:30,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:04:30,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 143 transitions. [2024-06-20 16:04:30,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4750830564784053 [2024-06-20 16:04:30,289 INFO L175 Difference]: Start difference. First operand has 80 places, 91 transitions, 649 flow. Second operand 7 states and 143 transitions. [2024-06-20 16:04:30,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 126 transitions, 1189 flow [2024-06-20 16:04:30,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 126 transitions, 1135 flow, removed 23 selfloop flow, removed 2 redundant places. [2024-06-20 16:04:30,310 INFO L231 Difference]: Finished difference. Result has 86 places, 103 transitions, 866 flow [2024-06-20 16:04:30,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=595, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=866, PETRI_PLACES=86, PETRI_TRANSITIONS=103} [2024-06-20 16:04:30,311 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 42 predicate places. [2024-06-20 16:04:30,311 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 103 transitions, 866 flow [2024-06-20 16:04:30,311 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) [2024-06-20 16:04:30,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:04:30,311 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:04:30,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-20 16:04:30,312 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)] === [2024-06-20 16:04:30,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:04:30,312 INFO L85 PathProgramCache]: Analyzing trace with hash -959118987, now seen corresponding path program 3 times [2024-06-20 16:04:30,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:04:30,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639866973] [2024-06-20 16:04:30,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:04:30,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:04:30,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:04:31,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:04:31,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:04:31,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639866973] [2024-06-20 16:04:31,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639866973] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:04:31,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:04:31,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:04:31,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550550358] [2024-06-20 16:04:31,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:04:31,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:04:31,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:04:31,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:04:31,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:04:31,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 16:04:31,177 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 103 transitions, 866 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) [2024-06-20 16:04:31,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:04:31,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 16:04:31,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:04:31,683 INFO L124 PetriNetUnfolderBase]: 2192/3300 cut-off events. [2024-06-20 16:04:31,683 INFO L125 PetriNetUnfolderBase]: For 47482/47495 co-relation queries the response was YES. [2024-06-20 16:04:31,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18093 conditions, 3300 events. 2192/3300 cut-off events. For 47482/47495 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 15994 event pairs, 823 based on Foata normal form. 13/3310 useless extension candidates. Maximal degree in co-relation 18056. Up to 3079 conditions per place. [2024-06-20 16:04:31,702 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 80 selfloop transitions, 37 changer transitions 0/125 dead transitions. [2024-06-20 16:04:31,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 125 transitions, 1238 flow [2024-06-20 16:04:31,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:04:31,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:04:31,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 142 transitions. [2024-06-20 16:04:31,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4717607973421927 [2024-06-20 16:04:31,703 INFO L175 Difference]: Start difference. First operand has 86 places, 103 transitions, 866 flow. Second operand 7 states and 142 transitions. [2024-06-20 16:04:31,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 125 transitions, 1238 flow [2024-06-20 16:04:31,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 125 transitions, 1143 flow, removed 42 selfloop flow, removed 2 redundant places. [2024-06-20 16:04:31,731 INFO L231 Difference]: Finished difference. Result has 91 places, 103 transitions, 855 flow [2024-06-20 16:04:31,731 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=771, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=855, PETRI_PLACES=91, PETRI_TRANSITIONS=103} [2024-06-20 16:04:31,732 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 47 predicate places. [2024-06-20 16:04:31,732 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 103 transitions, 855 flow [2024-06-20 16:04:31,732 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) [2024-06-20 16:04:31,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:04:31,732 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:04:31,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-20 16:04:31,732 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)] === [2024-06-20 16:04:31,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:04:31,733 INFO L85 PathProgramCache]: Analyzing trace with hash -959119235, now seen corresponding path program 3 times [2024-06-20 16:04:31,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:04:31,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673632735] [2024-06-20 16:04:31,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:04:31,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:04:31,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:04:32,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:04:32,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:04:32,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673632735] [2024-06-20 16:04:32,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673632735] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:04:32,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:04:32,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:04:32,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893227994] [2024-06-20 16:04:32,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:04:32,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:04:32,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:04:32,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:04:32,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:04:32,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 16:04:32,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 103 transitions, 855 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) [2024-06-20 16:04:32,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:04:32,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 16:04:32,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:04:33,174 INFO L124 PetriNetUnfolderBase]: 2142/3236 cut-off events. [2024-06-20 16:04:33,174 INFO L125 PetriNetUnfolderBase]: For 48006/48054 co-relation queries the response was YES. [2024-06-20 16:04:33,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17475 conditions, 3236 events. 2142/3236 cut-off events. For 48006/48054 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 15615 event pairs, 789 based on Foata normal form. 9/3218 useless extension candidates. Maximal degree in co-relation 17436. Up to 3003 conditions per place. [2024-06-20 16:04:33,194 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 84 selfloop transitions, 26 changer transitions 0/125 dead transitions. [2024-06-20 16:04:33,194 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 125 transitions, 1175 flow [2024-06-20 16:04:33,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:04:33,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:04:33,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-20 16:04:33,195 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4485049833887043 [2024-06-20 16:04:33,195 INFO L175 Difference]: Start difference. First operand has 91 places, 103 transitions, 855 flow. Second operand 7 states and 135 transitions. [2024-06-20 16:04:33,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 125 transitions, 1175 flow [2024-06-20 16:04:33,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 125 transitions, 1042 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-20 16:04:33,218 INFO L231 Difference]: Finished difference. Result has 90 places, 106 transitions, 840 flow [2024-06-20 16:04:33,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=722, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=840, PETRI_PLACES=90, PETRI_TRANSITIONS=106} [2024-06-20 16:04:33,219 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 46 predicate places. [2024-06-20 16:04:33,219 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 106 transitions, 840 flow [2024-06-20 16:04:33,219 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) [2024-06-20 16:04:33,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:04:33,219 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:04:33,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-20 16:04:33,219 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)] === [2024-06-20 16:04:33,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:04:33,220 INFO L85 PathProgramCache]: Analyzing trace with hash -958811405, now seen corresponding path program 1 times [2024-06-20 16:04:33,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:04:33,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756234139] [2024-06-20 16:04:33,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:04:33,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:04:33,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:04:34,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:04:34,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:04:34,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756234139] [2024-06-20 16:04:34,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756234139] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:04:34,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:04:34,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:04:34,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091492576] [2024-06-20 16:04:34,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:04:34,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:04:34,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:04:34,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:04:34,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:04:34,467 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-20 16:04:34,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 106 transitions, 840 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) [2024-06-20 16:04:34,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:04:34,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-20 16:04:34,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:04:35,044 INFO L124 PetriNetUnfolderBase]: 1910/3013 cut-off events. [2024-06-20 16:04:35,044 INFO L125 PetriNetUnfolderBase]: For 46575/46575 co-relation queries the response was YES. [2024-06-20 16:04:35,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16075 conditions, 3013 events. 1910/3013 cut-off events. For 46575/46575 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 15343 event pairs, 672 based on Foata normal form. 6/3017 useless extension candidates. Maximal degree in co-relation 16038. Up to 2741 conditions per place. [2024-06-20 16:04:35,061 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 101 selfloop transitions, 24 changer transitions 0/135 dead transitions. [2024-06-20 16:04:35,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 135 transitions, 1268 flow [2024-06-20 16:04:35,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:04:35,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:04:35,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2024-06-20 16:04:35,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4738372093023256 [2024-06-20 16:04:35,063 INFO L175 Difference]: Start difference. First operand has 90 places, 106 transitions, 840 flow. Second operand 8 states and 163 transitions. [2024-06-20 16:04:35,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 135 transitions, 1268 flow [2024-06-20 16:04:35,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 135 transitions, 1174 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-20 16:04:35,087 INFO L231 Difference]: Finished difference. Result has 93 places, 109 transitions, 858 flow [2024-06-20 16:04:35,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=746, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=858, PETRI_PLACES=93, PETRI_TRANSITIONS=109} [2024-06-20 16:04:35,087 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 49 predicate places. [2024-06-20 16:04:35,088 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 109 transitions, 858 flow [2024-06-20 16:04:35,088 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) [2024-06-20 16:04:35,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:04:35,088 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:04:35,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-20 16:04:35,088 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)] === [2024-06-20 16:04:35,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:04:35,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1404750099, now seen corresponding path program 1 times [2024-06-20 16:04:35,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:04:35,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823507201] [2024-06-20 16:04:35,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:04:35,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:04:35,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:04:35,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:04:35,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:04:35,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823507201] [2024-06-20 16:04:35,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823507201] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:04:35,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:04:35,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 16:04:35,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470051598] [2024-06-20 16:04:35,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:04:35,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 16:04:35,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:04:35,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 16:04:35,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-20 16:04:35,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-20 16:04:35,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 109 transitions, 858 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) [2024-06-20 16:04:35,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:04:35,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-20 16:04:35,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:04:36,289 INFO L124 PetriNetUnfolderBase]: 1908/3009 cut-off events. [2024-06-20 16:04:36,289 INFO L125 PetriNetUnfolderBase]: For 50273/50273 co-relation queries the response was YES. [2024-06-20 16:04:36,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16553 conditions, 3009 events. 1908/3009 cut-off events. For 50273/50273 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 15309 event pairs, 691 based on Foata normal form. 1/3008 useless extension candidates. Maximal degree in co-relation 16515. Up to 2810 conditions per place. [2024-06-20 16:04:36,310 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 99 selfloop transitions, 8 changer transitions 0/117 dead transitions. [2024-06-20 16:04:36,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 117 transitions, 1092 flow [2024-06-20 16:04:36,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 16:04:36,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 16:04:36,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 97 transitions. [2024-06-20 16:04:36,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4511627906976744 [2024-06-20 16:04:36,312 INFO L175 Difference]: Start difference. First operand has 93 places, 109 transitions, 858 flow. Second operand 5 states and 97 transitions. [2024-06-20 16:04:36,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 117 transitions, 1092 flow [2024-06-20 16:04:36,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 117 transitions, 996 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-20 16:04:36,342 INFO L231 Difference]: Finished difference. Result has 92 places, 109 transitions, 784 flow [2024-06-20 16:04:36,342 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=762, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=784, PETRI_PLACES=92, PETRI_TRANSITIONS=109} [2024-06-20 16:04:36,342 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 48 predicate places. [2024-06-20 16:04:36,343 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 109 transitions, 784 flow [2024-06-20 16:04:36,343 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) [2024-06-20 16:04:36,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:04:36,343 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:04:36,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-20 16:04:36,343 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)] === [2024-06-20 16:04:36,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:04:36,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1594860028, now seen corresponding path program 1 times [2024-06-20 16:04:36,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:04:36,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723827899] [2024-06-20 16:04:36,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:04:36,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:04:36,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:04:37,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:04:37,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:04:37,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723827899] [2024-06-20 16:04:37,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723827899] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:04:37,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:04:37,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:04:37,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198621722] [2024-06-20 16:04:37,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:04:37,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:04:37,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:04:37,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:04:37,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:04:37,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 16:04:37,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 109 transitions, 784 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) [2024-06-20 16:04:37,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:04:37,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 16:04:37,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:04:37,780 INFO L124 PetriNetUnfolderBase]: 2155/3263 cut-off events. [2024-06-20 16:04:37,781 INFO L125 PetriNetUnfolderBase]: For 63675/63693 co-relation queries the response was YES. [2024-06-20 16:04:37,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18597 conditions, 3263 events. 2155/3263 cut-off events. For 63675/63693 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 15895 event pairs, 746 based on Foata normal form. 6/3253 useless extension candidates. Maximal degree in co-relation 18558. Up to 3040 conditions per place. [2024-06-20 16:04:37,798 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 112 selfloop transitions, 17 changer transitions 0/145 dead transitions. [2024-06-20 16:04:37,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 145 transitions, 1182 flow [2024-06-20 16:04:37,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:04:37,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:04:37,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-20 16:04:37,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45930232558139533 [2024-06-20 16:04:37,800 INFO L175 Difference]: Start difference. First operand has 92 places, 109 transitions, 784 flow. Second operand 8 states and 158 transitions. [2024-06-20 16:04:37,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 145 transitions, 1182 flow [2024-06-20 16:04:37,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 145 transitions, 1160 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-20 16:04:37,824 INFO L231 Difference]: Finished difference. Result has 96 places, 112 transitions, 864 flow [2024-06-20 16:04:37,825 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=762, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=864, PETRI_PLACES=96, PETRI_TRANSITIONS=112} [2024-06-20 16:04:37,825 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 52 predicate places. [2024-06-20 16:04:37,825 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 112 transitions, 864 flow [2024-06-20 16:04:37,825 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) [2024-06-20 16:04:37,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:04:37,826 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:04:37,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-20 16:04:37,826 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)] === [2024-06-20 16:04:37,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:04:37,826 INFO L85 PathProgramCache]: Analyzing trace with hash 1595009758, now seen corresponding path program 2 times [2024-06-20 16:04:37,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:04:37,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330050216] [2024-06-20 16:04:37,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:04:37,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:04:37,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:04:38,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:04:38,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:04:38,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330050216] [2024-06-20 16:04:38,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330050216] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:04:38,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:04:38,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:04:38,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330095338] [2024-06-20 16:04:38,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:04:38,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:04:38,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:04:38,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:04:38,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:04:38,686 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 16:04:38,686 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 112 transitions, 864 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) [2024-06-20 16:04:38,686 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:04:38,687 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 16:04:38,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:04:39,310 INFO L124 PetriNetUnfolderBase]: 2177/3300 cut-off events. [2024-06-20 16:04:39,310 INFO L125 PetriNetUnfolderBase]: For 71571/71589 co-relation queries the response was YES. [2024-06-20 16:04:39,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19553 conditions, 3300 events. 2177/3300 cut-off events. For 71571/71589 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 16119 event pairs, 746 based on Foata normal form. 6/3290 useless extension candidates. Maximal degree in co-relation 19514. Up to 3045 conditions per place. [2024-06-20 16:04:39,329 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 108 selfloop transitions, 22 changer transitions 0/146 dead transitions. [2024-06-20 16:04:39,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 146 transitions, 1266 flow [2024-06-20 16:04:39,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:04:39,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:04:39,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-20 16:04:39,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45930232558139533 [2024-06-20 16:04:39,332 INFO L175 Difference]: Start difference. First operand has 96 places, 112 transitions, 864 flow. Second operand 8 states and 158 transitions. [2024-06-20 16:04:39,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 146 transitions, 1266 flow [2024-06-20 16:04:39,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 146 transitions, 1188 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-20 16:04:39,375 INFO L231 Difference]: Finished difference. Result has 98 places, 115 transitions, 904 flow [2024-06-20 16:04:39,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=786, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=904, PETRI_PLACES=98, PETRI_TRANSITIONS=115} [2024-06-20 16:04:39,376 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 54 predicate places. [2024-06-20 16:04:39,376 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 115 transitions, 904 flow [2024-06-20 16:04:39,376 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) [2024-06-20 16:04:39,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:04:39,377 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:04:39,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-20 16:04:39,377 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)] === [2024-06-20 16:04:39,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:04:39,377 INFO L85 PathProgramCache]: Analyzing trace with hash 306717921, now seen corresponding path program 1 times [2024-06-20 16:04:39,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:04:39,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362424855] [2024-06-20 16:04:39,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:04:39,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:04:39,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:04:40,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:04:40,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:04:40,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362424855] [2024-06-20 16:04:40,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362424855] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:04:40,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:04:40,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:04:40,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782431997] [2024-06-20 16:04:40,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:04:40,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:04:40,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:04:40,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:04:40,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:04:40,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-20 16:04:40,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 115 transitions, 904 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) [2024-06-20 16:04:40,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:04:40,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-20 16:04:40,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:04:40,937 INFO L124 PetriNetUnfolderBase]: 2377/3526 cut-off events. [2024-06-20 16:04:40,937 INFO L125 PetriNetUnfolderBase]: For 80969/80969 co-relation queries the response was YES. [2024-06-20 16:04:40,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21373 conditions, 3526 events. 2377/3526 cut-off events. For 80969/80969 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 16744 event pairs, 779 based on Foata normal form. 3/3527 useless extension candidates. Maximal degree in co-relation 21333. Up to 3417 conditions per place. [2024-06-20 16:04:40,963 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 127 selfloop transitions, 27 changer transitions 0/158 dead transitions. [2024-06-20 16:04:40,963 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 158 transitions, 1558 flow [2024-06-20 16:04:40,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:04:40,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:04:40,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-20 16:04:40,964 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45348837209302323 [2024-06-20 16:04:40,964 INFO L175 Difference]: Start difference. First operand has 98 places, 115 transitions, 904 flow. Second operand 8 states and 156 transitions. [2024-06-20 16:04:40,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 158 transitions, 1558 flow [2024-06-20 16:04:40,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 158 transitions, 1464 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-20 16:04:41,001 INFO L231 Difference]: Finished difference. Result has 102 places, 126 transitions, 1048 flow [2024-06-20 16:04:41,001 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=810, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1048, PETRI_PLACES=102, PETRI_TRANSITIONS=126} [2024-06-20 16:04:41,002 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 58 predicate places. [2024-06-20 16:04:41,002 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 126 transitions, 1048 flow [2024-06-20 16:04:41,002 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) [2024-06-20 16:04:41,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:04:41,002 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:04:41,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-20 16:04:41,002 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)] === [2024-06-20 16:04:41,003 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:04:41,003 INFO L85 PathProgramCache]: Analyzing trace with hash 1600574165, now seen corresponding path program 2 times [2024-06-20 16:04:41,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:04:41,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232737022] [2024-06-20 16:04:41,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:04:41,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:04:41,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:04:41,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:04:41,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:04:41,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232737022] [2024-06-20 16:04:41,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232737022] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:04:41,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:04:41,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:04:41,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250222382] [2024-06-20 16:04:41,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:04:41,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:04:41,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:04:41,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:04:41,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:04:41,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-20 16:04:41,934 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 126 transitions, 1048 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) [2024-06-20 16:04:41,934 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:04:41,934 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-20 16:04:41,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:04:42,470 INFO L124 PetriNetUnfolderBase]: 2427/3597 cut-off events. [2024-06-20 16:04:42,470 INFO L125 PetriNetUnfolderBase]: For 91678/91678 co-relation queries the response was YES. [2024-06-20 16:04:42,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22910 conditions, 3597 events. 2427/3597 cut-off events. For 91678/91678 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 17079 event pairs, 777 based on Foata normal form. 3/3598 useless extension candidates. Maximal degree in co-relation 22867. Up to 3402 conditions per place. [2024-06-20 16:04:42,493 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 122 selfloop transitions, 39 changer transitions 0/165 dead transitions. [2024-06-20 16:04:42,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 165 transitions, 1776 flow [2024-06-20 16:04:42,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:04:42,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:04:42,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-20 16:04:42,495 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4563953488372093 [2024-06-20 16:04:42,495 INFO L175 Difference]: Start difference. First operand has 102 places, 126 transitions, 1048 flow. Second operand 8 states and 157 transitions. [2024-06-20 16:04:42,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 165 transitions, 1776 flow [2024-06-20 16:04:42,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 165 transitions, 1687 flow, removed 37 selfloop flow, removed 3 redundant places. [2024-06-20 16:04:42,542 INFO L231 Difference]: Finished difference. Result has 108 places, 134 transitions, 1193 flow [2024-06-20 16:04:42,542 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=959, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1193, PETRI_PLACES=108, PETRI_TRANSITIONS=134} [2024-06-20 16:04:42,542 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 64 predicate places. [2024-06-20 16:04:42,542 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 134 transitions, 1193 flow [2024-06-20 16:04:42,542 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) [2024-06-20 16:04:42,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:04:42,543 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:04:42,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-20 16:04:42,543 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)] === [2024-06-20 16:04:42,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:04:42,543 INFO L85 PathProgramCache]: Analyzing trace with hash 1600573948, now seen corresponding path program 3 times [2024-06-20 16:04:42,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:04:42,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32460433] [2024-06-20 16:04:42,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:04:42,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:04:42,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:04:43,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:04:43,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:04:43,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32460433] [2024-06-20 16:04:43,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32460433] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:04:43,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:04:43,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:04:43,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959018131] [2024-06-20 16:04:43,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:04:43,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:04:43,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:04:43,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:04:43,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:04:43,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 16:04:43,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 134 transitions, 1193 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) [2024-06-20 16:04:43,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:04:43,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 16:04:43,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:04:43,948 INFO L124 PetriNetUnfolderBase]: 2307/3480 cut-off events. [2024-06-20 16:04:43,948 INFO L125 PetriNetUnfolderBase]: For 102358/102392 co-relation queries the response was YES. [2024-06-20 16:04:43,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23390 conditions, 3480 events. 2307/3480 cut-off events. For 102358/102392 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 16959 event pairs, 726 based on Foata normal form. 6/3470 useless extension candidates. Maximal degree in co-relation 23344. Up to 3166 conditions per place. [2024-06-20 16:04:43,972 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 115 selfloop transitions, 29 changer transitions 0/165 dead transitions. [2024-06-20 16:04:43,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 165 transitions, 1629 flow [2024-06-20 16:04:43,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:04:43,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:04:43,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-20 16:04:43,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4563953488372093 [2024-06-20 16:04:43,973 INFO L175 Difference]: Start difference. First operand has 108 places, 134 transitions, 1193 flow. Second operand 8 states and 157 transitions. [2024-06-20 16:04:43,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 165 transitions, 1629 flow [2024-06-20 16:04:44,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 165 transitions, 1492 flow, removed 42 selfloop flow, removed 5 redundant places. [2024-06-20 16:04:44,027 INFO L231 Difference]: Finished difference. Result has 111 places, 137 transitions, 1202 flow [2024-06-20 16:04:44,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1056, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1202, PETRI_PLACES=111, PETRI_TRANSITIONS=137} [2024-06-20 16:04:44,028 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 67 predicate places. [2024-06-20 16:04:44,028 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 137 transitions, 1202 flow [2024-06-20 16:04:44,028 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) [2024-06-20 16:04:44,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:04:44,028 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:04:44,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-20 16:04:44,029 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)] === [2024-06-20 16:04:44,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:04:44,030 INFO L85 PathProgramCache]: Analyzing trace with hash 312289551, now seen corresponding path program 3 times [2024-06-20 16:04:44,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:04:44,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203210763] [2024-06-20 16:04:44,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:04:44,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:04:44,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:04:44,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:04:44,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:04:44,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203210763] [2024-06-20 16:04:44,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203210763] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:04:44,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:04:44,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:04:44,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007532841] [2024-06-20 16:04:44,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:04:44,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:04:44,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:04:44,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:04:44,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:04:44,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-20 16:04:44,886 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 137 transitions, 1202 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) [2024-06-20 16:04:44,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:04:44,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-20 16:04:44,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:04:45,478 INFO L124 PetriNetUnfolderBase]: 2451/3637 cut-off events. [2024-06-20 16:04:45,478 INFO L125 PetriNetUnfolderBase]: For 110434/110434 co-relation queries the response was YES. [2024-06-20 16:04:45,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24395 conditions, 3637 events. 2451/3637 cut-off events. For 110434/110434 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 17341 event pairs, 777 based on Foata normal form. 3/3638 useless extension candidates. Maximal degree in co-relation 24348. Up to 3439 conditions per place. [2024-06-20 16:04:45,501 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 118 selfloop transitions, 47 changer transitions 0/169 dead transitions. [2024-06-20 16:04:45,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 169 transitions, 1769 flow [2024-06-20 16:04:45,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:04:45,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:04:45,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-20 16:04:45,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45058139534883723 [2024-06-20 16:04:45,503 INFO L175 Difference]: Start difference. First operand has 111 places, 137 transitions, 1202 flow. Second operand 8 states and 155 transitions. [2024-06-20 16:04:45,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 169 transitions, 1769 flow [2024-06-20 16:04:45,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 169 transitions, 1647 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-20 16:04:45,565 INFO L231 Difference]: Finished difference. Result has 113 places, 141 transitions, 1260 flow [2024-06-20 16:04:45,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1080, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1260, PETRI_PLACES=113, PETRI_TRANSITIONS=141} [2024-06-20 16:04:45,565 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 69 predicate places. [2024-06-20 16:04:45,566 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 141 transitions, 1260 flow [2024-06-20 16:04:45,566 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) [2024-06-20 16:04:45,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:04:45,566 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:04:45,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-20 16:04:45,566 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)] === [2024-06-20 16:04:45,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:04:45,567 INFO L85 PathProgramCache]: Analyzing trace with hash 312289830, now seen corresponding path program 1 times [2024-06-20 16:04:45,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:04:45,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667417904] [2024-06-20 16:04:45,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:04:45,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:04:45,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:04:46,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:04:46,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:04:46,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667417904] [2024-06-20 16:04:46,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667417904] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:04:46,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:04:46,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:04:46,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651065947] [2024-06-20 16:04:46,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:04:46,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:04:46,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:04:46,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:04:46,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:04:46,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 16:04:46,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 141 transitions, 1260 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) [2024-06-20 16:04:46,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:04:46,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 16:04:46,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:04:47,122 INFO L124 PetriNetUnfolderBase]: 2368/3562 cut-off events. [2024-06-20 16:04:47,122 INFO L125 PetriNetUnfolderBase]: For 116849/116849 co-relation queries the response was YES. [2024-06-20 16:04:47,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24104 conditions, 3562 events. 2368/3562 cut-off events. For 116849/116849 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 17388 event pairs, 759 based on Foata normal form. 3/3563 useless extension candidates. Maximal degree in co-relation 24056. Up to 3344 conditions per place. [2024-06-20 16:04:47,145 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 132 selfloop transitions, 26 changer transitions 0/173 dead transitions. [2024-06-20 16:04:47,145 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 173 transitions, 1814 flow [2024-06-20 16:04:47,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:04:47,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:04:47,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-20 16:04:47,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4622093023255814 [2024-06-20 16:04:47,147 INFO L175 Difference]: Start difference. First operand has 113 places, 141 transitions, 1260 flow. Second operand 8 states and 159 transitions. [2024-06-20 16:04:47,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 173 transitions, 1814 flow [2024-06-20 16:04:47,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 173 transitions, 1691 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-20 16:04:47,206 INFO L231 Difference]: Finished difference. Result has 116 places, 145 transitions, 1278 flow [2024-06-20 16:04:47,206 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1137, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1278, PETRI_PLACES=116, PETRI_TRANSITIONS=145} [2024-06-20 16:04:47,206 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 72 predicate places. [2024-06-20 16:04:47,207 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 145 transitions, 1278 flow [2024-06-20 16:04:47,207 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) [2024-06-20 16:04:47,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:04:47,208 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:04:47,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-20 16:04:47,208 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)] === [2024-06-20 16:04:47,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:04:47,208 INFO L85 PathProgramCache]: Analyzing trace with hash 513371361, now seen corresponding path program 4 times [2024-06-20 16:04:47,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:04:47,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382140879] [2024-06-20 16:04:47,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:04:47,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:04:47,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:04:48,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:04:48,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:04:48,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382140879] [2024-06-20 16:04:48,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382140879] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:04:48,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:04:48,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:04:48,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298579909] [2024-06-20 16:04:48,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:04:48,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:04:48,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:04:48,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:04:48,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:04:48,152 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-20 16:04:48,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 145 transitions, 1278 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) [2024-06-20 16:04:48,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:04:48,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-20 16:04:48,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:04:48,807 INFO L124 PetriNetUnfolderBase]: 2487/3692 cut-off events. [2024-06-20 16:04:48,808 INFO L125 PetriNetUnfolderBase]: For 126357/126373 co-relation queries the response was YES. [2024-06-20 16:04:48,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25674 conditions, 3692 events. 2487/3692 cut-off events. For 126357/126373 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 17689 event pairs, 769 based on Foata normal form. 10/3699 useless extension candidates. Maximal degree in co-relation 25625. Up to 3347 conditions per place. [2024-06-20 16:04:48,837 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 117 selfloop transitions, 61 changer transitions 0/182 dead transitions. [2024-06-20 16:04:48,837 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 182 transitions, 2140 flow [2024-06-20 16:04:48,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:04:48,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:04:48,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-20 16:04:48,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45930232558139533 [2024-06-20 16:04:48,838 INFO L175 Difference]: Start difference. First operand has 116 places, 145 transitions, 1278 flow. Second operand 8 states and 158 transitions. [2024-06-20 16:04:48,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 182 transitions, 2140 flow [2024-06-20 16:04:48,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 182 transitions, 2025 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-20 16:04:48,914 INFO L231 Difference]: Finished difference. Result has 119 places, 153 transitions, 1458 flow [2024-06-20 16:04:48,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1163, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1458, PETRI_PLACES=119, PETRI_TRANSITIONS=153} [2024-06-20 16:04:48,914 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 75 predicate places. [2024-06-20 16:04:48,914 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 153 transitions, 1458 flow [2024-06-20 16:04:48,914 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) [2024-06-20 16:04:48,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:04:48,915 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:04:48,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-20 16:04:48,915 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)] === [2024-06-20 16:04:48,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:04:48,915 INFO L85 PathProgramCache]: Analyzing trace with hash 332075516, now seen corresponding path program 4 times [2024-06-20 16:04:48,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:04:48,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404037028] [2024-06-20 16:04:48,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:04:48,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:04:48,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:04:49,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:04:49,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:04:49,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404037028] [2024-06-20 16:04:49,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404037028] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:04:49,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:04:49,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:04:49,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656061230] [2024-06-20 16:04:49,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:04:49,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:04:49,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:04:49,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:04:49,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:04:49,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 16:04:49,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 153 transitions, 1458 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) [2024-06-20 16:04:49,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:04:49,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 16:04:49,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:04:50,335 INFO L124 PetriNetUnfolderBase]: 2351/3553 cut-off events. [2024-06-20 16:04:50,335 INFO L125 PetriNetUnfolderBase]: For 137222/137278 co-relation queries the response was YES. [2024-06-20 16:04:50,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25872 conditions, 3553 events. 2351/3553 cut-off events. For 137222/137278 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 17413 event pairs, 725 based on Foata normal form. 11/3547 useless extension candidates. Maximal degree in co-relation 25821. Up to 3176 conditions per place. [2024-06-20 16:04:50,359 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 118 selfloop transitions, 38 changer transitions 0/181 dead transitions. [2024-06-20 16:04:50,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 181 transitions, 1924 flow [2024-06-20 16:04:50,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:04:50,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:04:50,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-20 16:04:50,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45348837209302323 [2024-06-20 16:04:50,361 INFO L175 Difference]: Start difference. First operand has 119 places, 153 transitions, 1458 flow. Second operand 8 states and 156 transitions. [2024-06-20 16:04:50,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 181 transitions, 1924 flow [2024-06-20 16:04:50,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 181 transitions, 1738 flow, removed 48 selfloop flow, removed 5 redundant places. [2024-06-20 16:04:50,435 INFO L231 Difference]: Finished difference. Result has 122 places, 156 transitions, 1450 flow [2024-06-20 16:04:50,436 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1272, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1450, PETRI_PLACES=122, PETRI_TRANSITIONS=156} [2024-06-20 16:04:50,436 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 78 predicate places. [2024-06-20 16:04:50,436 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 156 transitions, 1450 flow [2024-06-20 16:04:50,436 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) [2024-06-20 16:04:50,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:04:50,436 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:04:50,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-20 16:04:50,437 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)] === [2024-06-20 16:04:50,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:04:50,437 INFO L85 PathProgramCache]: Analyzing trace with hash 332083452, now seen corresponding path program 2 times [2024-06-20 16:04:50,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:04:50,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980465993] [2024-06-20 16:04:50,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:04:50,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:04:50,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:04:51,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:04:51,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:04:51,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980465993] [2024-06-20 16:04:51,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980465993] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:04:51,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:04:51,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:04:51,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686346188] [2024-06-20 16:04:51,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:04:51,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:04:51,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:04:51,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:04:51,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:04:51,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 16:04:51,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 156 transitions, 1450 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) [2024-06-20 16:04:51,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:04:51,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 16:04:51,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:04:52,049 INFO L124 PetriNetUnfolderBase]: 2410/3630 cut-off events. [2024-06-20 16:04:52,049 INFO L125 PetriNetUnfolderBase]: For 147596/147612 co-relation queries the response was YES. [2024-06-20 16:04:52,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26363 conditions, 3630 events. 2410/3630 cut-off events. For 147596/147612 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 17856 event pairs, 765 based on Foata normal form. 15/3642 useless extension candidates. Maximal degree in co-relation 26311. Up to 3314 conditions per place. [2024-06-20 16:04:52,077 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 128 selfloop transitions, 41 changer transitions 0/186 dead transitions. [2024-06-20 16:04:52,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 186 transitions, 2098 flow [2024-06-20 16:04:52,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:04:52,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:04:52,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-20 16:04:52,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-20 16:04:52,078 INFO L175 Difference]: Start difference. First operand has 122 places, 156 transitions, 1450 flow. Second operand 8 states and 160 transitions. [2024-06-20 16:04:52,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 186 transitions, 2098 flow [2024-06-20 16:04:52,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 186 transitions, 1944 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-06-20 16:04:52,162 INFO L231 Difference]: Finished difference. Result has 124 places, 160 transitions, 1479 flow [2024-06-20 16:04:52,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1296, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1479, PETRI_PLACES=124, PETRI_TRANSITIONS=160} [2024-06-20 16:04:52,162 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 80 predicate places. [2024-06-20 16:04:52,162 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 160 transitions, 1479 flow [2024-06-20 16:04:52,162 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) [2024-06-20 16:04:52,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:04:52,163 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:04:52,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-20 16:04:52,163 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)] === [2024-06-20 16:04:52,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:04:52,163 INFO L85 PathProgramCache]: Analyzing trace with hash 341279943, now seen corresponding path program 5 times [2024-06-20 16:04:52,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:04:52,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579477408] [2024-06-20 16:04:52,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:04:52,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:04:52,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:04:52,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:04:52,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:04:52,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579477408] [2024-06-20 16:04:52,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579477408] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:04:52,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:04:52,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:04:52,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906452178] [2024-06-20 16:04:52,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:04:52,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:04:52,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:04:52,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:04:52,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:04:52,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-20 16:04:52,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 160 transitions, 1479 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) [2024-06-20 16:04:52,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:04:52,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-20 16:04:52,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:04:53,391 INFO L124 PetriNetUnfolderBase]: 2537/3769 cut-off events. [2024-06-20 16:04:53,392 INFO L125 PetriNetUnfolderBase]: For 156564/156580 co-relation queries the response was YES. [2024-06-20 16:04:53,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27982 conditions, 3769 events. 2537/3769 cut-off events. For 156564/156580 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 18125 event pairs, 769 based on Foata normal form. 10/3776 useless extension candidates. Maximal degree in co-relation 27929. Up to 3410 conditions per place. [2024-06-20 16:04:53,418 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 110 selfloop transitions, 81 changer transitions 0/195 dead transitions. [2024-06-20 16:04:53,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 195 transitions, 2323 flow [2024-06-20 16:04:53,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:04:53,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:04:53,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-20 16:04:53,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4563953488372093 [2024-06-20 16:04:53,419 INFO L175 Difference]: Start difference. First operand has 124 places, 160 transitions, 1479 flow. Second operand 8 states and 157 transitions. [2024-06-20 16:04:53,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 195 transitions, 2323 flow [2024-06-20 16:04:53,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 195 transitions, 2170 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-20 16:04:53,511 INFO L231 Difference]: Finished difference. Result has 126 places, 168 transitions, 1673 flow [2024-06-20 16:04:53,511 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1326, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1673, PETRI_PLACES=126, PETRI_TRANSITIONS=168} [2024-06-20 16:04:53,512 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 82 predicate places. [2024-06-20 16:04:53,512 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 168 transitions, 1673 flow [2024-06-20 16:04:53,512 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) [2024-06-20 16:04:53,512 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:04:53,512 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:04:53,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-20 16:04:53,513 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)] === [2024-06-20 16:04:53,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:04:53,513 INFO L85 PathProgramCache]: Analyzing trace with hash 304738600, now seen corresponding path program 3 times [2024-06-20 16:04:53,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:04:53,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724362435] [2024-06-20 16:04:53,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:04:53,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:04:53,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:04:54,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:04:54,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:04:54,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724362435] [2024-06-20 16:04:54,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724362435] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:04:54,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:04:54,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:04:54,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400743739] [2024-06-20 16:04:54,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:04:54,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:04:54,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:04:54,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:04:54,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:04:54,623 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 16:04:54,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 168 transitions, 1673 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) [2024-06-20 16:04:54,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:04:54,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 16:04:54,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:04:55,221 INFO L124 PetriNetUnfolderBase]: 2438/3670 cut-off events. [2024-06-20 16:04:55,221 INFO L125 PetriNetUnfolderBase]: For 163662/163676 co-relation queries the response was YES. [2024-06-20 16:04:55,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27648 conditions, 3670 events. 2438/3670 cut-off events. For 163662/163676 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 18031 event pairs, 765 based on Foata normal form. 13/3680 useless extension candidates. Maximal degree in co-relation 27594. Up to 3296 conditions per place. [2024-06-20 16:04:55,249 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 124 selfloop transitions, 58 changer transitions 0/201 dead transitions. [2024-06-20 16:04:55,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 201 transitions, 2319 flow [2024-06-20 16:04:55,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:04:55,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:04:55,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-20 16:04:55,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4599483204134367 [2024-06-20 16:04:55,251 INFO L175 Difference]: Start difference. First operand has 126 places, 168 transitions, 1673 flow. Second operand 9 states and 178 transitions. [2024-06-20 16:04:55,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 201 transitions, 2319 flow [2024-06-20 16:04:55,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 201 transitions, 2230 flow, removed 35 selfloop flow, removed 3 redundant places. [2024-06-20 16:04:55,354 INFO L231 Difference]: Finished difference. Result has 132 places, 172 transitions, 1812 flow [2024-06-20 16:04:55,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1584, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1812, PETRI_PLACES=132, PETRI_TRANSITIONS=172} [2024-06-20 16:04:55,354 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 88 predicate places. [2024-06-20 16:04:55,355 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 172 transitions, 1812 flow [2024-06-20 16:04:55,355 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) [2024-06-20 16:04:55,355 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:04:55,355 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:04:55,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-20 16:04:55,355 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)] === [2024-06-20 16:04:55,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:04:55,355 INFO L85 PathProgramCache]: Analyzing trace with hash 332083173, now seen corresponding path program 6 times [2024-06-20 16:04:55,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:04:55,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861411167] [2024-06-20 16:04:55,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:04:55,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:04:55,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:04:56,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:04:56,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:04:56,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861411167] [2024-06-20 16:04:56,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861411167] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:04:56,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:04:56,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:04:56,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139130974] [2024-06-20 16:04:56,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:04:56,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:04:56,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:04:56,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:04:56,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:04:56,184 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-20 16:04:56,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 172 transitions, 1812 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) [2024-06-20 16:04:56,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:04:56,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-20 16:04:56,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:04:56,808 INFO L124 PetriNetUnfolderBase]: 2533/3764 cut-off events. [2024-06-20 16:04:56,808 INFO L125 PetriNetUnfolderBase]: For 173043/173059 co-relation queries the response was YES. [2024-06-20 16:04:56,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29185 conditions, 3764 events. 2533/3764 cut-off events. For 173043/173059 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 18145 event pairs, 769 based on Foata normal form. 10/3771 useless extension candidates. Maximal degree in co-relation 29129. Up to 3409 conditions per place. [2024-06-20 16:04:56,835 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 126 selfloop transitions, 68 changer transitions 0/198 dead transitions. [2024-06-20 16:04:56,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 198 transitions, 2444 flow [2024-06-20 16:04:56,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:04:56,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:04:56,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-20 16:04:56,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4563953488372093 [2024-06-20 16:04:56,836 INFO L175 Difference]: Start difference. First operand has 132 places, 172 transitions, 1812 flow. Second operand 8 states and 157 transitions. [2024-06-20 16:04:56,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 198 transitions, 2444 flow [2024-06-20 16:04:56,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 198 transitions, 2196 flow, removed 69 selfloop flow, removed 7 redundant places. [2024-06-20 16:04:56,976 INFO L231 Difference]: Finished difference. Result has 133 places, 172 transitions, 1709 flow [2024-06-20 16:04:56,976 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1564, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1709, PETRI_PLACES=133, PETRI_TRANSITIONS=172} [2024-06-20 16:04:56,977 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 89 predicate places. [2024-06-20 16:04:56,977 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 172 transitions, 1709 flow [2024-06-20 16:04:56,977 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) [2024-06-20 16:04:56,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:04:56,977 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:04:56,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-20 16:04:56,978 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:04:56,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:04:56,978 INFO L85 PathProgramCache]: Analyzing trace with hash -597578827, now seen corresponding path program 1 times [2024-06-20 16:04:56,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:04:56,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318676814] [2024-06-20 16:04:56,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:04:56,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:04:56,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:04:57,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:04:57,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:04:57,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318676814] [2024-06-20 16:04:57,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318676814] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:04:57,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:04:57,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:04:57,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483090417] [2024-06-20 16:04:57,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:04:57,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:04:57,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:04:57,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:04:57,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:04:57,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-20 16:04:57,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 172 transitions, 1709 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) [2024-06-20 16:04:57,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:04:57,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-20 16:04:57,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:04:58,268 INFO L124 PetriNetUnfolderBase]: 2148/3369 cut-off events. [2024-06-20 16:04:58,268 INFO L125 PetriNetUnfolderBase]: For 148112/148112 co-relation queries the response was YES. [2024-06-20 16:04:58,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25589 conditions, 3369 events. 2148/3369 cut-off events. For 148112/148112 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 17174 event pairs, 635 based on Foata normal form. 2/3369 useless extension candidates. Maximal degree in co-relation 25532. Up to 3068 conditions per place. [2024-06-20 16:04:58,294 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 154 selfloop transitions, 11 changer transitions 0/185 dead transitions. [2024-06-20 16:04:58,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 185 transitions, 2095 flow [2024-06-20 16:04:58,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:04:58,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:04:58,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 113 transitions. [2024-06-20 16:04:58,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.437984496124031 [2024-06-20 16:04:58,295 INFO L175 Difference]: Start difference. First operand has 133 places, 172 transitions, 1709 flow. Second operand 6 states and 113 transitions. [2024-06-20 16:04:58,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 185 transitions, 2095 flow [2024-06-20 16:04:58,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 185 transitions, 1925 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-20 16:04:58,396 INFO L231 Difference]: Finished difference. Result has 133 places, 175 transitions, 1605 flow [2024-06-20 16:04:58,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1539, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1605, PETRI_PLACES=133, PETRI_TRANSITIONS=175} [2024-06-20 16:04:58,397 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 89 predicate places. [2024-06-20 16:04:58,397 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 175 transitions, 1605 flow [2024-06-20 16:04:58,397 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) [2024-06-20 16:04:58,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:04:58,397 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:04:58,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-20 16:04:58,397 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)] === [2024-06-20 16:04:58,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:04:58,398 INFO L85 PathProgramCache]: Analyzing trace with hash -2098950574, now seen corresponding path program 1 times [2024-06-20 16:04:58,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:04:58,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021642265] [2024-06-20 16:04:58,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:04:58,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:04:58,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:04:59,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:04:59,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:04:59,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021642265] [2024-06-20 16:04:59,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021642265] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:04:59,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:04:59,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:04:59,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58409068] [2024-06-20 16:04:59,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:04:59,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:04:59,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:04:59,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:04:59,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:04:59,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 16:04:59,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 175 transitions, 1605 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) [2024-06-20 16:04:59,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:04:59,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 16:04:59,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:05:00,195 INFO L124 PetriNetUnfolderBase]: 2375/3597 cut-off events. [2024-06-20 16:05:00,195 INFO L125 PetriNetUnfolderBase]: For 180916/180918 co-relation queries the response was YES. [2024-06-20 16:05:00,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28410 conditions, 3597 events. 2375/3597 cut-off events. For 180916/180918 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 17763 event pairs, 683 based on Foata normal form. 4/3599 useless extension candidates. Maximal degree in co-relation 28352. Up to 3302 conditions per place. [2024-06-20 16:05:00,224 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 168 selfloop transitions, 20 changer transitions 0/217 dead transitions. [2024-06-20 16:05:00,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 217 transitions, 2181 flow [2024-06-20 16:05:00,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:05:00,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:05:00,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-20 16:05:00,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573643410852713 [2024-06-20 16:05:00,226 INFO L175 Difference]: Start difference. First operand has 133 places, 175 transitions, 1605 flow. Second operand 9 states and 177 transitions. [2024-06-20 16:05:00,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 217 transitions, 2181 flow [2024-06-20 16:05:00,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 217 transitions, 2133 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-20 16:05:00,320 INFO L231 Difference]: Finished difference. Result has 138 places, 178 transitions, 1711 flow [2024-06-20 16:05:00,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1557, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1711, PETRI_PLACES=138, PETRI_TRANSITIONS=178} [2024-06-20 16:05:00,321 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 94 predicate places. [2024-06-20 16:05:00,321 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 178 transitions, 1711 flow [2024-06-20 16:05:00,321 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) [2024-06-20 16:05:00,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:05:00,321 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:05:00,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-20 16:05:00,321 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)] === [2024-06-20 16:05:00,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:05:00,322 INFO L85 PathProgramCache]: Analyzing trace with hash 1193487430, now seen corresponding path program 1 times [2024-06-20 16:05:00,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:05:00,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186385725] [2024-06-20 16:05:00,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:05:00,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:05:00,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:05:01,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:05:01,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:05:01,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186385725] [2024-06-20 16:05:01,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186385725] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:05:01,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:05:01,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:05:01,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605878325] [2024-06-20 16:05:01,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:05:01,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:05:01,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:05:01,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:05:01,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:05:01,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-20 16:05:01,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 178 transitions, 1711 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) [2024-06-20 16:05:01,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:05:01,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-20 16:05:01,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:05:01,854 INFO L124 PetriNetUnfolderBase]: 2587/3840 cut-off events. [2024-06-20 16:05:01,854 INFO L125 PetriNetUnfolderBase]: For 199931/199931 co-relation queries the response was YES. [2024-06-20 16:05:01,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30798 conditions, 3840 events. 2587/3840 cut-off events. For 199931/199931 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 18544 event pairs, 708 based on Foata normal form. 6/3844 useless extension candidates. Maximal degree in co-relation 30739. Up to 3653 conditions per place. [2024-06-20 16:05:01,886 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 195 selfloop transitions, 32 changer transitions 0/231 dead transitions. [2024-06-20 16:05:01,886 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 231 transitions, 2751 flow [2024-06-20 16:05:01,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:05:01,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:05:01,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-20 16:05:01,887 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4625322997416021 [2024-06-20 16:05:01,887 INFO L175 Difference]: Start difference. First operand has 138 places, 178 transitions, 1711 flow. Second operand 9 states and 179 transitions. [2024-06-20 16:05:01,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 231 transitions, 2751 flow [2024-06-20 16:05:01,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 231 transitions, 2621 flow, removed 47 selfloop flow, removed 7 redundant places. [2024-06-20 16:05:01,990 INFO L231 Difference]: Finished difference. Result has 142 places, 189 transitions, 1899 flow [2024-06-20 16:05:01,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1581, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1899, PETRI_PLACES=142, PETRI_TRANSITIONS=189} [2024-06-20 16:05:01,991 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 98 predicate places. [2024-06-20 16:05:01,991 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 189 transitions, 1899 flow [2024-06-20 16:05:01,991 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) [2024-06-20 16:05:01,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:05:01,991 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:05:01,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-20 16:05:01,991 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)] === [2024-06-20 16:05:01,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:05:01,992 INFO L85 PathProgramCache]: Analyzing trace with hash -2094297350, now seen corresponding path program 1 times [2024-06-20 16:05:01,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:05:01,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254137880] [2024-06-20 16:05:01,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:05:01,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:05:02,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:05:02,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:05:02,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:05:02,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254137880] [2024-06-20 16:05:02,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254137880] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:05:02,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:05:02,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:05:02,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447470561] [2024-06-20 16:05:02,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:05:02,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:05:02,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:05:02,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:05:02,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:05:02,924 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-20 16:05:02,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 189 transitions, 1899 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) [2024-06-20 16:05:02,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:05:02,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-20 16:05:02,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:05:03,606 INFO L124 PetriNetUnfolderBase]: 2605/3869 cut-off events. [2024-06-20 16:05:03,606 INFO L125 PetriNetUnfolderBase]: For 215819/215819 co-relation queries the response was YES. [2024-06-20 16:05:03,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32202 conditions, 3869 events. 2605/3869 cut-off events. For 215819/215819 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 18787 event pairs, 696 based on Foata normal form. 3/3870 useless extension candidates. Maximal degree in co-relation 32140. Up to 3732 conditions per place. [2024-06-20 16:05:03,636 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 194 selfloop transitions, 31 changer transitions 0/229 dead transitions. [2024-06-20 16:05:03,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 229 transitions, 2747 flow [2024-06-20 16:05:03,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:05:03,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:05:03,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-20 16:05:03,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470284237726098 [2024-06-20 16:05:03,638 INFO L175 Difference]: Start difference. First operand has 142 places, 189 transitions, 1899 flow. Second operand 9 states and 173 transitions. [2024-06-20 16:05:03,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 229 transitions, 2747 flow [2024-06-20 16:05:03,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 229 transitions, 2599 flow, removed 63 selfloop flow, removed 4 redundant places. [2024-06-20 16:05:03,785 INFO L231 Difference]: Finished difference. Result has 147 places, 193 transitions, 1934 flow [2024-06-20 16:05:03,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1751, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1934, PETRI_PLACES=147, PETRI_TRANSITIONS=193} [2024-06-20 16:05:03,787 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 103 predicate places. [2024-06-20 16:05:03,787 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 193 transitions, 1934 flow [2024-06-20 16:05:03,787 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) [2024-06-20 16:05:03,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:05:03,787 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:05:03,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-20 16:05:03,787 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)] === [2024-06-20 16:05:03,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:05:03,788 INFO L85 PathProgramCache]: Analyzing trace with hash 918321688, now seen corresponding path program 2 times [2024-06-20 16:05:03,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:05:03,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983538391] [2024-06-20 16:05:03,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:05:03,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:05:03,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:05:04,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:05:04,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:05:04,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983538391] [2024-06-20 16:05:04,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983538391] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:05:04,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:05:04,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:05:04,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637220328] [2024-06-20 16:05:04,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:05:04,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:05:04,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:05:04,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:05:04,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:05:04,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-20 16:05:04,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 193 transitions, 1934 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) [2024-06-20 16:05:04,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:05:04,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-20 16:05:04,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:05:05,398 INFO L124 PetriNetUnfolderBase]: 2721/4040 cut-off events. [2024-06-20 16:05:05,398 INFO L125 PetriNetUnfolderBase]: For 236887/236887 co-relation queries the response was YES. [2024-06-20 16:05:05,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34259 conditions, 4040 events. 2721/4040 cut-off events. For 236887/236887 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 19753 event pairs, 689 based on Foata normal form. 6/4044 useless extension candidates. Maximal degree in co-relation 34195. Up to 3690 conditions per place. [2024-06-20 16:05:05,433 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 190 selfloop transitions, 52 changer transitions 0/246 dead transitions. [2024-06-20 16:05:05,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 246 transitions, 3176 flow [2024-06-20 16:05:05,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:05:05,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:05:05,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 181 transitions. [2024-06-20 16:05:05,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46770025839793283 [2024-06-20 16:05:05,438 INFO L175 Difference]: Start difference. First operand has 147 places, 193 transitions, 1934 flow. Second operand 9 states and 181 transitions. [2024-06-20 16:05:05,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 246 transitions, 3176 flow [2024-06-20 16:05:05,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 246 transitions, 3023 flow, removed 48 selfloop flow, removed 7 redundant places. [2024-06-20 16:05:05,570 INFO L231 Difference]: Finished difference. Result has 150 places, 205 transitions, 2234 flow [2024-06-20 16:05:05,571 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1781, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2234, PETRI_PLACES=150, PETRI_TRANSITIONS=205} [2024-06-20 16:05:05,571 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 106 predicate places. [2024-06-20 16:05:05,571 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 205 transitions, 2234 flow [2024-06-20 16:05:05,571 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) [2024-06-20 16:05:05,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:05:05,571 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:05:05,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-20 16:05:05,572 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)] === [2024-06-20 16:05:05,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:05:05,572 INFO L85 PathProgramCache]: Analyzing trace with hash 918315178, now seen corresponding path program 3 times [2024-06-20 16:05:05,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:05:05,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636689169] [2024-06-20 16:05:05,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:05:05,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:05:05,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:05:06,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:05:06,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:05:06,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636689169] [2024-06-20 16:05:06,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636689169] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:05:06,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:05:06,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:05:06,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485976034] [2024-06-20 16:05:06,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:05:06,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:05:06,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:05:06,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:05:06,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:05:06,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-20 16:05:06,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 205 transitions, 2234 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) [2024-06-20 16:05:06,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:05:06,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-20 16:05:06,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:05:07,333 INFO L124 PetriNetUnfolderBase]: 2709/4020 cut-off events. [2024-06-20 16:05:07,333 INFO L125 PetriNetUnfolderBase]: For 248248/248248 co-relation queries the response was YES. [2024-06-20 16:05:07,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34971 conditions, 4020 events. 2709/4020 cut-off events. For 248248/248248 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 19573 event pairs, 699 based on Foata normal form. 6/4024 useless extension candidates. Maximal degree in co-relation 34905. Up to 3684 conditions per place. [2024-06-20 16:05:07,425 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 194 selfloop transitions, 47 changer transitions 0/245 dead transitions. [2024-06-20 16:05:07,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 245 transitions, 3108 flow [2024-06-20 16:05:07,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:05:07,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:05:07,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 180 transitions. [2024-06-20 16:05:07,427 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-20 16:05:07,427 INFO L175 Difference]: Start difference. First operand has 150 places, 205 transitions, 2234 flow. Second operand 9 states and 180 transitions. [2024-06-20 16:05:07,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 245 transitions, 3108 flow [2024-06-20 16:05:07,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 245 transitions, 2867 flow, removed 108 selfloop flow, removed 4 redundant places. [2024-06-20 16:05:07,625 INFO L231 Difference]: Finished difference. Result has 155 places, 205 transitions, 2097 flow [2024-06-20 16:05:07,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1993, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2097, PETRI_PLACES=155, PETRI_TRANSITIONS=205} [2024-06-20 16:05:07,626 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 111 predicate places. [2024-06-20 16:05:07,626 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 205 transitions, 2097 flow [2024-06-20 16:05:07,627 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) [2024-06-20 16:05:07,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:05:07,627 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:05:07,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-20 16:05:07,627 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:05:07,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:05:07,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1200162598, now seen corresponding path program 1 times [2024-06-20 16:05:07,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:05:07,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280940444] [2024-06-20 16:05:07,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:05:07,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:05:07,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:05:08,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:05:08,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:05:08,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280940444] [2024-06-20 16:05:08,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280940444] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:05:08,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:05:08,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:05:08,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367940626] [2024-06-20 16:05:08,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:05:08,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:05:08,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:05:08,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:05:08,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:05:08,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 16:05:08,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 205 transitions, 2097 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) [2024-06-20 16:05:08,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:05:08,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 16:05:08,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:05:09,539 INFO L124 PetriNetUnfolderBase]: 2634/3961 cut-off events. [2024-06-20 16:05:09,539 INFO L125 PetriNetUnfolderBase]: For 252972/252972 co-relation queries the response was YES. [2024-06-20 16:05:09,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33915 conditions, 3961 events. 2634/3961 cut-off events. For 252972/252972 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 19802 event pairs, 707 based on Foata normal form. 6/3965 useless extension candidates. Maximal degree in co-relation 33847. Up to 3672 conditions per place. [2024-06-20 16:05:09,573 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 192 selfloop transitions, 29 changer transitions 0/241 dead transitions. [2024-06-20 16:05:09,573 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 241 transitions, 2873 flow [2024-06-20 16:05:09,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:05:09,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:05:09,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-20 16:05:09,575 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573643410852713 [2024-06-20 16:05:09,575 INFO L175 Difference]: Start difference. First operand has 155 places, 205 transitions, 2097 flow. Second operand 9 states and 177 transitions. [2024-06-20 16:05:09,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 241 transitions, 2873 flow [2024-06-20 16:05:09,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 241 transitions, 2712 flow, removed 15 selfloop flow, removed 10 redundant places. [2024-06-20 16:05:09,734 INFO L231 Difference]: Finished difference. Result has 154 places, 208 transitions, 2112 flow [2024-06-20 16:05:09,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1936, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2112, PETRI_PLACES=154, PETRI_TRANSITIONS=208} [2024-06-20 16:05:09,735 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 110 predicate places. [2024-06-20 16:05:09,735 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 208 transitions, 2112 flow [2024-06-20 16:05:09,735 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) [2024-06-20 16:05:09,735 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:05:09,735 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:05:09,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-20 16:05:09,736 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)] === [2024-06-20 16:05:09,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:05:09,736 INFO L85 PathProgramCache]: Analyzing trace with hash -1951895396, now seen corresponding path program 2 times [2024-06-20 16:05:09,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:05:09,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291416048] [2024-06-20 16:05:09,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:05:09,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:05:09,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:05:10,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:05:10,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:05:10,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291416048] [2024-06-20 16:05:10,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291416048] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:05:10,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:05:10,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:05:10,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085366908] [2024-06-20 16:05:10,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:05:10,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:05:10,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:05:10,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:05:10,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:05:10,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-20 16:05:10,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 208 transitions, 2112 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) [2024-06-20 16:05:10,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:05:10,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-20 16:05:10,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:05:11,652 INFO L124 PetriNetUnfolderBase]: 2779/4124 cut-off events. [2024-06-20 16:05:11,652 INFO L125 PetriNetUnfolderBase]: For 267718/267718 co-relation queries the response was YES. [2024-06-20 16:05:11,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35565 conditions, 4124 events. 2779/4124 cut-off events. For 267718/267718 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 20219 event pairs, 702 based on Foata normal form. 3/4125 useless extension candidates. Maximal degree in co-relation 35499. Up to 3850 conditions per place. [2024-06-20 16:05:11,688 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 187 selfloop transitions, 63 changer transitions 0/254 dead transitions. [2024-06-20 16:05:11,688 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 254 transitions, 3242 flow [2024-06-20 16:05:11,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:05:11,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:05:11,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 192 transitions. [2024-06-20 16:05:11,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44651162790697674 [2024-06-20 16:05:11,690 INFO L175 Difference]: Start difference. First operand has 154 places, 208 transitions, 2112 flow. Second operand 10 states and 192 transitions. [2024-06-20 16:05:11,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 254 transitions, 3242 flow [2024-06-20 16:05:11,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 254 transitions, 3090 flow, removed 49 selfloop flow, removed 7 redundant places. [2024-06-20 16:05:11,879 INFO L231 Difference]: Finished difference. Result has 157 places, 216 transitions, 2340 flow [2024-06-20 16:05:11,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1960, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2340, PETRI_PLACES=157, PETRI_TRANSITIONS=216} [2024-06-20 16:05:11,881 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 113 predicate places. [2024-06-20 16:05:11,881 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 216 transitions, 2340 flow [2024-06-20 16:05:11,881 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) [2024-06-20 16:05:11,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:05:11,881 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:05:11,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-20 16:05:11,882 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)] === [2024-06-20 16:05:11,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:05:11,882 INFO L85 PathProgramCache]: Analyzing trace with hash 1091042218, now seen corresponding path program 4 times [2024-06-20 16:05:11,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:05:11,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703271087] [2024-06-20 16:05:11,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:05:11,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:05:11,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:05:12,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:05:12,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:05:12,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703271087] [2024-06-20 16:05:12,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703271087] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:05:12,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:05:12,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:05:12,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410117228] [2024-06-20 16:05:12,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:05:12,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:05:12,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:05:12,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:05:12,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:05:12,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-20 16:05:12,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 216 transitions, 2340 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) [2024-06-20 16:05:12,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:05:12,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-20 16:05:12,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:05:13,464 INFO L124 PetriNetUnfolderBase]: 2895/4300 cut-off events. [2024-06-20 16:05:13,464 INFO L125 PetriNetUnfolderBase]: For 295761/295761 co-relation queries the response was YES. [2024-06-20 16:05:13,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38025 conditions, 4300 events. 2895/4300 cut-off events. For 295761/295761 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 21260 event pairs, 681 based on Foata normal form. 6/4304 useless extension candidates. Maximal degree in co-relation 37958. Up to 3740 conditions per place. [2024-06-20 16:05:13,504 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 179 selfloop transitions, 82 changer transitions 0/265 dead transitions. [2024-06-20 16:05:13,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 265 transitions, 3594 flow [2024-06-20 16:05:13,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:05:13,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:05:13,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 180 transitions. [2024-06-20 16:05:13,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-20 16:05:13,505 INFO L175 Difference]: Start difference. First operand has 157 places, 216 transitions, 2340 flow. Second operand 9 states and 180 transitions. [2024-06-20 16:05:13,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 265 transitions, 3594 flow [2024-06-20 16:05:13,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 265 transitions, 3403 flow, removed 63 selfloop flow, removed 6 redundant places. [2024-06-20 16:05:13,736 INFO L231 Difference]: Finished difference. Result has 161 places, 228 transitions, 2705 flow [2024-06-20 16:05:13,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2149, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2705, PETRI_PLACES=161, PETRI_TRANSITIONS=228} [2024-06-20 16:05:13,737 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 117 predicate places. [2024-06-20 16:05:13,737 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 228 transitions, 2705 flow [2024-06-20 16:05:13,737 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) [2024-06-20 16:05:13,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:05:13,737 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:05:13,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-20 16:05:13,737 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)] === [2024-06-20 16:05:13,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:05:13,738 INFO L85 PathProgramCache]: Analyzing trace with hash -1384437468, now seen corresponding path program 5 times [2024-06-20 16:05:13,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:05:13,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220328900] [2024-06-20 16:05:13,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:05:13,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:05:13,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:05:14,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:05:14,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:05:14,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220328900] [2024-06-20 16:05:14,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220328900] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:05:14,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:05:14,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:05:14,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952435415] [2024-06-20 16:05:14,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:05:14,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:05:14,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:05:14,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:05:14,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:05:14,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-20 16:05:14,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 228 transitions, 2705 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) [2024-06-20 16:05:14,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:05:14,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-20 16:05:14,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:05:15,433 INFO L124 PetriNetUnfolderBase]: 2931/4361 cut-off events. [2024-06-20 16:05:15,434 INFO L125 PetriNetUnfolderBase]: For 314410/314410 co-relation queries the response was YES. [2024-06-20 16:05:15,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39844 conditions, 4361 events. 2931/4361 cut-off events. For 314410/314410 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 21724 event pairs, 703 based on Foata normal form. 6/4365 useless extension candidates. Maximal degree in co-relation 39774. Up to 3770 conditions per place. [2024-06-20 16:05:15,475 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 194 selfloop transitions, 72 changer transitions 0/270 dead transitions. [2024-06-20 16:05:15,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 270 transitions, 3862 flow [2024-06-20 16:05:15,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:05:15,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:05:15,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 181 transitions. [2024-06-20 16:05:15,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46770025839793283 [2024-06-20 16:05:15,476 INFO L175 Difference]: Start difference. First operand has 161 places, 228 transitions, 2705 flow. Second operand 9 states and 181 transitions. [2024-06-20 16:05:15,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 270 transitions, 3862 flow [2024-06-20 16:05:15,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 270 transitions, 3698 flow, removed 69 selfloop flow, removed 4 redundant places. [2024-06-20 16:05:15,804 INFO L231 Difference]: Finished difference. Result has 166 places, 232 transitions, 2828 flow [2024-06-20 16:05:15,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2545, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2828, PETRI_PLACES=166, PETRI_TRANSITIONS=232} [2024-06-20 16:05:15,805 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 122 predicate places. [2024-06-20 16:05:15,805 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 232 transitions, 2828 flow [2024-06-20 16:05:15,805 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) [2024-06-20 16:05:15,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:05:15,805 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:05:15,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-20 16:05:15,806 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)] === [2024-06-20 16:05:15,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:05:15,806 INFO L85 PathProgramCache]: Analyzing trace with hash -1952134654, now seen corresponding path program 6 times [2024-06-20 16:05:15,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:05:15,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693182293] [2024-06-20 16:05:15,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:05:15,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:05:15,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:05:16,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:05:16,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:05:16,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693182293] [2024-06-20 16:05:16,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693182293] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:05:16,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:05:16,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:05:16,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029598737] [2024-06-20 16:05:16,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:05:16,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:05:16,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:05:16,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:05:16,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:05:16,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-20 16:05:16,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 232 transitions, 2828 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) [2024-06-20 16:05:16,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:05:16,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-20 16:05:16,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:05:17,621 INFO L124 PetriNetUnfolderBase]: 2919/4347 cut-off events. [2024-06-20 16:05:17,622 INFO L125 PetriNetUnfolderBase]: For 316351/316351 co-relation queries the response was YES. [2024-06-20 16:05:17,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39301 conditions, 4347 events. 2919/4347 cut-off events. For 316351/316351 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 21684 event pairs, 699 based on Foata normal form. 6/4351 useless extension candidates. Maximal degree in co-relation 39229. Up to 3764 conditions per place. [2024-06-20 16:05:17,658 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 192 selfloop transitions, 73 changer transitions 0/269 dead transitions. [2024-06-20 16:05:17,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 269 transitions, 3702 flow [2024-06-20 16:05:17,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:05:17,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:05:17,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 181 transitions. [2024-06-20 16:05:17,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46770025839793283 [2024-06-20 16:05:17,660 INFO L175 Difference]: Start difference. First operand has 166 places, 232 transitions, 2828 flow. Second operand 9 states and 181 transitions. [2024-06-20 16:05:17,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 269 transitions, 3702 flow [2024-06-20 16:05:18,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 269 transitions, 3355 flow, removed 101 selfloop flow, removed 7 redundant places. [2024-06-20 16:05:18,004 INFO L231 Difference]: Finished difference. Result has 168 places, 232 transitions, 2636 flow [2024-06-20 16:05:18,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2481, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2636, PETRI_PLACES=168, PETRI_TRANSITIONS=232} [2024-06-20 16:05:18,005 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 124 predicate places. [2024-06-20 16:05:18,005 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 232 transitions, 2636 flow [2024-06-20 16:05:18,005 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) [2024-06-20 16:05:18,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:05:18,006 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:05:18,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-20 16:05:18,006 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)] === [2024-06-20 16:05:18,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:05:18,006 INFO L85 PathProgramCache]: Analyzing trace with hash 1090811826, now seen corresponding path program 3 times [2024-06-20 16:05:18,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:05:18,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550147823] [2024-06-20 16:05:18,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:05:18,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:05:18,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:05:18,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:05:18,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:05:18,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550147823] [2024-06-20 16:05:18,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550147823] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:05:18,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:05:18,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:05:18,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162270736] [2024-06-20 16:05:18,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:05:18,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:05:18,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:05:18,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:05:18,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:05:19,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-20 16:05:19,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 232 transitions, 2636 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) [2024-06-20 16:05:19,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:05:19,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-20 16:05:19,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:05:19,837 INFO L124 PetriNetUnfolderBase]: 2913/4337 cut-off events. [2024-06-20 16:05:19,837 INFO L125 PetriNetUnfolderBase]: For 318913/318913 co-relation queries the response was YES. [2024-06-20 16:05:19,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38830 conditions, 4337 events. 2913/4337 cut-off events. For 318913/318913 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 21565 event pairs, 716 based on Foata normal form. 3/4338 useless extension candidates. Maximal degree in co-relation 38758. Up to 4092 conditions per place. [2024-06-20 16:05:19,877 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 215 selfloop transitions, 46 changer transitions 0/265 dead transitions. [2024-06-20 16:05:19,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 265 transitions, 3492 flow [2024-06-20 16:05:19,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:05:19,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:05:19,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-20 16:05:19,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470284237726098 [2024-06-20 16:05:19,879 INFO L175 Difference]: Start difference. First operand has 168 places, 232 transitions, 2636 flow. Second operand 9 states and 173 transitions. [2024-06-20 16:05:19,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 265 transitions, 3492 flow [2024-06-20 16:05:20,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 265 transitions, 3178 flow, removed 60 selfloop flow, removed 8 redundant places. [2024-06-20 16:05:20,153 INFO L231 Difference]: Finished difference. Result has 169 places, 232 transitions, 2423 flow [2024-06-20 16:05:20,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2322, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2423, PETRI_PLACES=169, PETRI_TRANSITIONS=232} [2024-06-20 16:05:20,154 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 125 predicate places. [2024-06-20 16:05:20,154 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 232 transitions, 2423 flow [2024-06-20 16:05:20,154 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) [2024-06-20 16:05:20,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:05:20,154 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:05:20,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-20 16:05:20,154 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:05:20,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:05:20,155 INFO L85 PathProgramCache]: Analyzing trace with hash 1906075114, now seen corresponding path program 1 times [2024-06-20 16:05:20,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:05:20,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946999538] [2024-06-20 16:05:20,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:05:20,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:05:20,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:05:20,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:05:20,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:05:20,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946999538] [2024-06-20 16:05:20,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946999538] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:05:20,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:05:20,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:05:20,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094357568] [2024-06-20 16:05:20,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:05:20,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:05:20,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:05:20,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:05:20,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:05:20,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 16:05:20,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 232 transitions, 2423 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) [2024-06-20 16:05:20,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:05:20,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 16:05:20,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:05:21,591 INFO L124 PetriNetUnfolderBase]: 2805/4231 cut-off events. [2024-06-20 16:05:21,591 INFO L125 PetriNetUnfolderBase]: For 326146/326146 co-relation queries the response was YES. [2024-06-20 16:05:21,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37553 conditions, 4231 events. 2805/4231 cut-off events. For 326146/326146 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 21509 event pairs, 729 based on Foata normal form. 1/4230 useless extension candidates. Maximal degree in co-relation 37481. Up to 3976 conditions per place. [2024-06-20 16:05:21,629 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 213 selfloop transitions, 16 changer transitions 0/251 dead transitions. [2024-06-20 16:05:21,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 251 transitions, 3056 flow [2024-06-20 16:05:21,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:05:21,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:05:21,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 116 transitions. [2024-06-20 16:05:21,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4496124031007752 [2024-06-20 16:05:21,630 INFO L175 Difference]: Start difference. First operand has 169 places, 232 transitions, 2423 flow. Second operand 6 states and 116 transitions. [2024-06-20 16:05:21,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 251 transitions, 3056 flow [2024-06-20 16:05:21,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 251 transitions, 2934 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-20 16:05:21,895 INFO L231 Difference]: Finished difference. Result has 167 places, 235 transitions, 2388 flow [2024-06-20 16:05:21,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2305, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2388, PETRI_PLACES=167, PETRI_TRANSITIONS=235} [2024-06-20 16:05:21,895 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 123 predicate places. [2024-06-20 16:05:21,895 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 235 transitions, 2388 flow [2024-06-20 16:05:21,896 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) [2024-06-20 16:05:21,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:05:21,896 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:05:21,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-20 16:05:21,896 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)] === [2024-06-20 16:05:21,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:05:21,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1704644748, now seen corresponding path program 4 times [2024-06-20 16:05:21,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:05:21,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208800370] [2024-06-20 16:05:21,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:05:21,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:05:21,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:05:23,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:05:23,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:05:23,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208800370] [2024-06-20 16:05:23,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208800370] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:05:23,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:05:23,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:05:23,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779307995] [2024-06-20 16:05:23,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:05:23,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:05:23,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:05:23,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:05:23,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:05:23,121 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-20 16:05:23,121 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 235 transitions, 2388 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) [2024-06-20 16:05:23,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:05:23,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-20 16:05:23,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:05:23,954 INFO L124 PetriNetUnfolderBase]: 2936/4373 cut-off events. [2024-06-20 16:05:23,955 INFO L125 PetriNetUnfolderBase]: For 339851/339865 co-relation queries the response was YES. [2024-06-20 16:05:23,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38808 conditions, 4373 events. 2936/4373 cut-off events. For 339851/339865 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 21803 event pairs, 711 based on Foata normal form. 8/4378 useless extension candidates. Maximal degree in co-relation 38735. Up to 3971 conditions per place. [2024-06-20 16:05:23,988 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 191 selfloop transitions, 74 changer transitions 0/269 dead transitions. [2024-06-20 16:05:23,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 269 transitions, 3382 flow [2024-06-20 16:05:23,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:05:23,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:05:23,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-20 16:05:23,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4496124031007752 [2024-06-20 16:05:23,992 INFO L175 Difference]: Start difference. First operand has 167 places, 235 transitions, 2388 flow. Second operand 9 states and 174 transitions. [2024-06-20 16:05:23,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 269 transitions, 3382 flow [2024-06-20 16:05:24,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 269 transitions, 3334 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-20 16:05:24,233 INFO L231 Difference]: Finished difference. Result has 172 places, 239 transitions, 2631 flow [2024-06-20 16:05:24,233 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2340, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2631, PETRI_PLACES=172, PETRI_TRANSITIONS=239} [2024-06-20 16:05:24,233 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 128 predicate places. [2024-06-20 16:05:24,233 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 239 transitions, 2631 flow [2024-06-20 16:05:24,234 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) [2024-06-20 16:05:24,234 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:05:24,234 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:05:24,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-20 16:05:24,234 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)] === [2024-06-20 16:05:24,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:05:24,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1704644500, now seen corresponding path program 7 times [2024-06-20 16:05:24,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:05:24,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523371962] [2024-06-20 16:05:24,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:05:24,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:05:24,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:05:25,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:05:25,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:05:25,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523371962] [2024-06-20 16:05:25,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523371962] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:05:25,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:05:25,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:05:25,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355115063] [2024-06-20 16:05:25,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:05:25,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:05:25,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:05:25,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:05:25,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:05:25,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-20 16:05:25,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 239 transitions, 2631 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) [2024-06-20 16:05:25,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:05:25,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-20 16:05:25,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:05:26,045 INFO L124 PetriNetUnfolderBase]: 3052/4557 cut-off events. [2024-06-20 16:05:26,045 INFO L125 PetriNetUnfolderBase]: For 374528/374542 co-relation queries the response was YES. [2024-06-20 16:05:26,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41837 conditions, 4557 events. 3052/4557 cut-off events. For 374528/374542 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 22972 event pairs, 715 based on Foata normal form. 11/4565 useless extension candidates. Maximal degree in co-relation 41763. Up to 3639 conditions per place. [2024-06-20 16:05:26,091 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 179 selfloop transitions, 106 changer transitions 0/289 dead transitions. [2024-06-20 16:05:26,091 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 289 transitions, 4235 flow [2024-06-20 16:05:26,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:05:26,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:05:26,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 185 transitions. [2024-06-20 16:05:26,092 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4780361757105943 [2024-06-20 16:05:26,092 INFO L175 Difference]: Start difference. First operand has 172 places, 239 transitions, 2631 flow. Second operand 9 states and 185 transitions. [2024-06-20 16:05:26,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 289 transitions, 4235 flow [2024-06-20 16:05:26,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 289 transitions, 3974 flow, removed 59 selfloop flow, removed 7 redundant places. [2024-06-20 16:05:26,383 INFO L231 Difference]: Finished difference. Result has 176 places, 251 transitions, 2984 flow [2024-06-20 16:05:26,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2370, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2984, PETRI_PLACES=176, PETRI_TRANSITIONS=251} [2024-06-20 16:05:26,383 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 132 predicate places. [2024-06-20 16:05:26,384 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 251 transitions, 2984 flow [2024-06-20 16:05:26,384 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) [2024-06-20 16:05:26,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:05:26,384 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:05:26,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-20 16:05:26,384 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)] === [2024-06-20 16:05:26,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:05:26,385 INFO L85 PathProgramCache]: Analyzing trace with hash 1999872318, now seen corresponding path program 5 times [2024-06-20 16:05:26,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:05:26,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922583703] [2024-06-20 16:05:26,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:05:26,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:05:26,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:05:27,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:05:27,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:05:27,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922583703] [2024-06-20 16:05:27,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922583703] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:05:27,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:05:27,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:05:27,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057036906] [2024-06-20 16:05:27,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:05:27,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:05:27,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:05:27,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:05:27,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:05:27,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-20 16:05:27,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 251 transitions, 2984 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) [2024-06-20 16:05:27,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:05:27,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-20 16:05:27,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:05:28,348 INFO L124 PetriNetUnfolderBase]: 3078/4593 cut-off events. [2024-06-20 16:05:28,349 INFO L125 PetriNetUnfolderBase]: For 395581/395595 co-relation queries the response was YES. [2024-06-20 16:05:28,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43597 conditions, 4593 events. 3078/4593 cut-off events. For 395581/395595 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 23226 event pairs, 727 based on Foata normal form. 8/4598 useless extension candidates. Maximal degree in co-relation 43520. Up to 4021 conditions per place. [2024-06-20 16:05:28,392 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 173 selfloop transitions, 121 changer transitions 0/298 dead transitions. [2024-06-20 16:05:28,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 298 transitions, 4310 flow [2024-06-20 16:05:28,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:05:28,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:05:28,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 210 transitions. [2024-06-20 16:05:28,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4439746300211416 [2024-06-20 16:05:28,393 INFO L175 Difference]: Start difference. First operand has 176 places, 251 transitions, 2984 flow. Second operand 11 states and 210 transitions. [2024-06-20 16:05:28,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 298 transitions, 4310 flow [2024-06-20 16:05:28,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 298 transitions, 4084 flow, removed 71 selfloop flow, removed 4 redundant places. [2024-06-20 16:05:28,931 INFO L231 Difference]: Finished difference. Result has 183 places, 259 transitions, 3298 flow [2024-06-20 16:05:28,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2758, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3298, PETRI_PLACES=183, PETRI_TRANSITIONS=259} [2024-06-20 16:05:28,932 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 139 predicate places. [2024-06-20 16:05:28,932 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 259 transitions, 3298 flow [2024-06-20 16:05:28,932 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) [2024-06-20 16:05:28,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:05:28,932 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:05:28,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-20 16:05:28,933 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)] === [2024-06-20 16:05:28,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:05:28,933 INFO L85 PathProgramCache]: Analyzing trace with hash 1989753298, now seen corresponding path program 2 times [2024-06-20 16:05:28,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:05:28,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221035044] [2024-06-20 16:05:28,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:05:28,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:05:28,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:05:29,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:05:29,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:05:29,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221035044] [2024-06-20 16:05:29,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221035044] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:05:29,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:05:29,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:05:29,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116225933] [2024-06-20 16:05:29,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:05:29,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:05:29,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:05:29,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:05:29,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:05:30,049 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 16:05:30,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 259 transitions, 3298 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) [2024-06-20 16:05:30,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:05:30,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 16:05:30,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:05:30,887 INFO L124 PetriNetUnfolderBase]: 3006/4539 cut-off events. [2024-06-20 16:05:30,887 INFO L125 PetriNetUnfolderBase]: For 413504/413518 co-relation queries the response was YES. [2024-06-20 16:05:30,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43881 conditions, 4539 events. 3006/4539 cut-off events. For 413504/413518 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 23387 event pairs, 738 based on Foata normal form. 16/4552 useless extension candidates. Maximal degree in co-relation 43802. Up to 4093 conditions per place. [2024-06-20 16:05:30,935 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 219 selfloop transitions, 52 changer transitions 0/296 dead transitions. [2024-06-20 16:05:30,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 296 transitions, 4255 flow [2024-06-20 16:05:30,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:05:30,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:05:30,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-20 16:05:30,936 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573643410852713 [2024-06-20 16:05:30,936 INFO L175 Difference]: Start difference. First operand has 183 places, 259 transitions, 3298 flow. Second operand 9 states and 177 transitions. [2024-06-20 16:05:30,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 296 transitions, 4255 flow [2024-06-20 16:05:31,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 296 transitions, 3978 flow, removed 76 selfloop flow, removed 7 redundant places. [2024-06-20 16:05:31,362 INFO L231 Difference]: Finished difference. Result has 186 places, 266 transitions, 3305 flow [2024-06-20 16:05:31,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3025, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3305, PETRI_PLACES=186, PETRI_TRANSITIONS=266} [2024-06-20 16:05:31,363 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 142 predicate places. [2024-06-20 16:05:31,363 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 266 transitions, 3305 flow [2024-06-20 16:05:31,363 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) [2024-06-20 16:05:31,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:05:31,363 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:05:31,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-20 16:05:31,363 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)] === [2024-06-20 16:05:31,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:05:31,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1704653428, now seen corresponding path program 3 times [2024-06-20 16:05:31,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:05:31,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925208195] [2024-06-20 16:05:31,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:05:31,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:05:31,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:05:32,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:05:32,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:05:32,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925208195] [2024-06-20 16:05:32,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925208195] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:05:32,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:05:32,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:05:32,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530522643] [2024-06-20 16:05:32,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:05:32,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:05:32,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:05:32,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:05:32,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:05:32,421 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 16:05:32,422 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 266 transitions, 3305 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) [2024-06-20 16:05:32,422 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:05:32,422 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 16:05:32,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:05:33,298 INFO L124 PetriNetUnfolderBase]: 3034/4583 cut-off events. [2024-06-20 16:05:33,299 INFO L125 PetriNetUnfolderBase]: For 428676/428690 co-relation queries the response was YES. [2024-06-20 16:05:33,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44878 conditions, 4583 events. 3034/4583 cut-off events. For 428676/428690 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 23686 event pairs, 740 based on Foata normal form. 16/4596 useless extension candidates. Maximal degree in co-relation 44796. Up to 4137 conditions per place. [2024-06-20 16:05:33,346 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 228 selfloop transitions, 47 changer transitions 0/300 dead transitions. [2024-06-20 16:05:33,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 300 transitions, 4353 flow [2024-06-20 16:05:33,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:05:33,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:05:33,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-20 16:05:33,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4599483204134367 [2024-06-20 16:05:33,347 INFO L175 Difference]: Start difference. First operand has 186 places, 266 transitions, 3305 flow. Second operand 9 states and 178 transitions. [2024-06-20 16:05:33,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 300 transitions, 4353 flow [2024-06-20 16:05:33,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 300 transitions, 4161 flow, removed 61 selfloop flow, removed 5 redundant places. [2024-06-20 16:05:33,796 INFO L231 Difference]: Finished difference. Result has 190 places, 269 transitions, 3355 flow [2024-06-20 16:05:33,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3113, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3355, PETRI_PLACES=190, PETRI_TRANSITIONS=269} [2024-06-20 16:05:33,796 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 146 predicate places. [2024-06-20 16:05:33,796 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 269 transitions, 3355 flow [2024-06-20 16:05:33,797 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) [2024-06-20 16:05:33,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:05:33,797 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:05:33,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-20 16:05:33,797 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)] === [2024-06-20 16:05:33,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:05:33,797 INFO L85 PathProgramCache]: Analyzing trace with hash 1704407350, now seen corresponding path program 8 times [2024-06-20 16:05:33,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:05:33,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730096401] [2024-06-20 16:05:33,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:05:33,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:05:33,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:05:34,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:05:34,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:05:34,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730096401] [2024-06-20 16:05:34,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730096401] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:05:34,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:05:34,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:05:34,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451995076] [2024-06-20 16:05:34,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:05:34,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:05:34,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:05:34,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:05:34,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:05:34,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-20 16:05:34,690 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 269 transitions, 3355 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) [2024-06-20 16:05:34,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:05:34,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-20 16:05:34,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:05:35,540 INFO L124 PetriNetUnfolderBase]: 3188/4762 cut-off events. [2024-06-20 16:05:35,540 INFO L125 PetriNetUnfolderBase]: For 447628/447642 co-relation queries the response was YES. [2024-06-20 16:05:35,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46736 conditions, 4762 events. 3188/4762 cut-off events. For 447628/447642 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 24231 event pairs, 716 based on Foata normal form. 11/4770 useless extension candidates. Maximal degree in co-relation 46653. Up to 3820 conditions per place. [2024-06-20 16:05:35,586 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 198 selfloop transitions, 108 changer transitions 0/310 dead transitions. [2024-06-20 16:05:35,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 310 transitions, 4846 flow [2024-06-20 16:05:35,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:05:35,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:05:35,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 182 transitions. [2024-06-20 16:05:35,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4702842377260982 [2024-06-20 16:05:35,596 INFO L175 Difference]: Start difference. First operand has 190 places, 269 transitions, 3355 flow. Second operand 9 states and 182 transitions. [2024-06-20 16:05:35,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 310 transitions, 4846 flow [2024-06-20 16:05:36,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 310 transitions, 4628 flow, removed 64 selfloop flow, removed 7 redundant places. [2024-06-20 16:05:36,135 INFO L231 Difference]: Finished difference. Result has 192 places, 273 transitions, 3488 flow [2024-06-20 16:05:36,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3137, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3488, PETRI_PLACES=192, PETRI_TRANSITIONS=273} [2024-06-20 16:05:36,136 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 148 predicate places. [2024-06-20 16:05:36,136 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 273 transitions, 3488 flow [2024-06-20 16:05:36,136 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) [2024-06-20 16:05:36,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:05:36,137 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:05:36,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-20 16:05:36,137 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:05:36,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:05:36,138 INFO L85 PathProgramCache]: Analyzing trace with hash 1999872628, now seen corresponding path program 4 times [2024-06-20 16:05:36,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:05:36,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127509850] [2024-06-20 16:05:36,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:05:36,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:05:36,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:05:37,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:05:37,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:05:37,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127509850] [2024-06-20 16:05:37,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127509850] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:05:37,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:05:37,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:05:37,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215895224] [2024-06-20 16:05:37,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:05:37,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:05:37,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:05:37,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:05:37,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:05:37,346 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 16:05:37,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 273 transitions, 3488 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) [2024-06-20 16:05:37,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:05:37,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 16:05:37,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:05:38,239 INFO L124 PetriNetUnfolderBase]: 3093/4682 cut-off events. [2024-06-20 16:05:38,239 INFO L125 PetriNetUnfolderBase]: For 462708/462722 co-relation queries the response was YES. [2024-06-20 16:05:38,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46607 conditions, 4682 events. 3093/4682 cut-off events. For 462708/462722 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 24351 event pairs, 745 based on Foata normal form. 16/4695 useless extension candidates. Maximal degree in co-relation 46523. Up to 4176 conditions per place. [2024-06-20 16:05:38,392 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 214 selfloop transitions, 67 changer transitions 0/306 dead transitions. [2024-06-20 16:05:38,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 306 transitions, 4464 flow [2024-06-20 16:05:38,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:05:38,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:05:38,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-20 16:05:38,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4599483204134367 [2024-06-20 16:05:38,394 INFO L175 Difference]: Start difference. First operand has 192 places, 273 transitions, 3488 flow. Second operand 9 states and 178 transitions. [2024-06-20 16:05:38,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 306 transitions, 4464 flow [2024-06-20 16:05:39,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 306 transitions, 4158 flow, removed 57 selfloop flow, removed 6 redundant places. [2024-06-20 16:05:39,047 INFO L231 Difference]: Finished difference. Result has 195 places, 276 transitions, 3470 flow [2024-06-20 16:05:39,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3182, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3470, PETRI_PLACES=195, PETRI_TRANSITIONS=276} [2024-06-20 16:05:39,048 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 151 predicate places. [2024-06-20 16:05:39,048 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 276 transitions, 3470 flow [2024-06-20 16:05:39,048 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) [2024-06-20 16:05:39,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:05:39,048 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:05:39,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-20 16:05:39,049 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)] === [2024-06-20 16:05:39,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:05:39,049 INFO L85 PathProgramCache]: Analyzing trace with hash 1989744370, now seen corresponding path program 9 times [2024-06-20 16:05:39,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:05:39,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780632922] [2024-06-20 16:05:39,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:05:39,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:05:39,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:05:39,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:05:39,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:05:39,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780632922] [2024-06-20 16:05:39,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780632922] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:05:39,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:05:39,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:05:39,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016845021] [2024-06-20 16:05:39,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:05:39,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:05:39,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:05:39,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:05:39,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:05:39,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-20 16:05:39,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 276 transitions, 3470 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) [2024-06-20 16:05:39,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:05:39,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-20 16:05:39,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:05:40,917 INFO L124 PetriNetUnfolderBase]: 3220/4817 cut-off events. [2024-06-20 16:05:40,918 INFO L125 PetriNetUnfolderBase]: For 477703/477717 co-relation queries the response was YES. [2024-06-20 16:05:40,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47481 conditions, 4817 events. 3220/4817 cut-off events. For 477703/477717 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 24627 event pairs, 688 based on Foata normal form. 11/4825 useless extension candidates. Maximal degree in co-relation 47396. Up to 3873 conditions per place. [2024-06-20 16:05:40,969 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 171 selfloop transitions, 139 changer transitions 0/314 dead transitions. [2024-06-20 16:05:40,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 314 transitions, 4722 flow [2024-06-20 16:05:40,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:05:40,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:05:40,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 180 transitions. [2024-06-20 16:05:40,971 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-20 16:05:40,971 INFO L175 Difference]: Start difference. First operand has 195 places, 276 transitions, 3470 flow. Second operand 9 states and 180 transitions. [2024-06-20 16:05:40,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 314 transitions, 4722 flow [2024-06-20 16:05:41,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 314 transitions, 4440 flow, removed 71 selfloop flow, removed 8 redundant places. [2024-06-20 16:05:41,613 INFO L231 Difference]: Finished difference. Result has 196 places, 280 transitions, 3619 flow [2024-06-20 16:05:41,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3188, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3619, PETRI_PLACES=196, PETRI_TRANSITIONS=280} [2024-06-20 16:05:41,620 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 152 predicate places. [2024-06-20 16:05:41,620 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 280 transitions, 3619 flow [2024-06-20 16:05:41,621 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) [2024-06-20 16:05:41,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:05:41,621 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:05:41,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-20 16:05:41,621 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)] === [2024-06-20 16:05:41,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:05:41,621 INFO L85 PathProgramCache]: Analyzing trace with hash 561504496, now seen corresponding path program 6 times [2024-06-20 16:05:41,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:05:41,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091986709] [2024-06-20 16:05:41,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:05:41,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:05:41,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:05:42,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:05:42,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:05:42,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091986709] [2024-06-20 16:05:42,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091986709] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:05:42,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:05:42,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:05:42,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087313738] [2024-06-20 16:05:42,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:05:42,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:05:42,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:05:42,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:05:42,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:05:42,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-20 16:05:42,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 280 transitions, 3619 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) [2024-06-20 16:05:42,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:05:42,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-20 16:05:42,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:05:43,649 INFO L124 PetriNetUnfolderBase]: 3238/4840 cut-off events. [2024-06-20 16:05:43,650 INFO L125 PetriNetUnfolderBase]: For 486030/486044 co-relation queries the response was YES. [2024-06-20 16:05:43,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48234 conditions, 4840 events. 3238/4840 cut-off events. For 486030/486044 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 24706 event pairs, 734 based on Foata normal form. 8/4845 useless extension candidates. Maximal degree in co-relation 48149. Up to 4415 conditions per place. [2024-06-20 16:05:43,697 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 238 selfloop transitions, 73 changer transitions 0/315 dead transitions. [2024-06-20 16:05:43,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 315 transitions, 4861 flow [2024-06-20 16:05:43,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:05:43,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:05:43,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-20 16:05:43,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4496124031007752 [2024-06-20 16:05:43,699 INFO L175 Difference]: Start difference. First operand has 196 places, 280 transitions, 3619 flow. Second operand 9 states and 174 transitions. [2024-06-20 16:05:43,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 315 transitions, 4861 flow [2024-06-20 16:05:44,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 315 transitions, 4543 flow, removed 61 selfloop flow, removed 6 redundant places. [2024-06-20 16:05:44,304 INFO L231 Difference]: Finished difference. Result has 199 places, 284 transitions, 3592 flow [2024-06-20 16:05:44,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3301, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3592, PETRI_PLACES=199, PETRI_TRANSITIONS=284} [2024-06-20 16:05:44,306 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 155 predicate places. [2024-06-20 16:05:44,306 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 284 transitions, 3592 flow [2024-06-20 16:05:44,306 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) [2024-06-20 16:05:44,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:05:44,306 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:05:44,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-20 16:05:44,306 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)] === [2024-06-20 16:05:44,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:05:44,307 INFO L85 PathProgramCache]: Analyzing trace with hash 1704413860, now seen corresponding path program 10 times [2024-06-20 16:05:44,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:05:44,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65482877] [2024-06-20 16:05:44,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:05:44,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:05:44,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:05:45,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:05:45,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:05:45,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65482877] [2024-06-20 16:05:45,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65482877] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:05:45,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:05:45,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:05:45,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353180670] [2024-06-20 16:05:45,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:05:45,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:05:45,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:05:45,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:05:45,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:05:45,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-20 16:05:45,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 284 transitions, 3592 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) [2024-06-20 16:05:45,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:05:45,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-20 16:05:45,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:05:46,069 INFO L124 PetriNetUnfolderBase]: 3226/4828 cut-off events. [2024-06-20 16:05:46,070 INFO L125 PetriNetUnfolderBase]: For 496492/496506 co-relation queries the response was YES. [2024-06-20 16:05:46,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47469 conditions, 4828 events. 3226/4828 cut-off events. For 496492/496506 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 24667 event pairs, 714 based on Foata normal form. 11/4836 useless extension candidates. Maximal degree in co-relation 47383. Up to 3893 conditions per place. [2024-06-20 16:05:46,120 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 204 selfloop transitions, 111 changer transitions 0/319 dead transitions. [2024-06-20 16:05:46,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 319 transitions, 4738 flow [2024-06-20 16:05:46,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:05:46,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:05:46,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 182 transitions. [2024-06-20 16:05:46,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4702842377260982 [2024-06-20 16:05:46,121 INFO L175 Difference]: Start difference. First operand has 199 places, 284 transitions, 3592 flow. Second operand 9 states and 182 transitions. [2024-06-20 16:05:46,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 319 transitions, 4738 flow [2024-06-20 16:05:46,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 319 transitions, 4406 flow, removed 104 selfloop flow, removed 6 redundant places. [2024-06-20 16:05:46,864 INFO L231 Difference]: Finished difference. Result has 202 places, 284 transitions, 3491 flow [2024-06-20 16:05:46,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3260, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3491, PETRI_PLACES=202, PETRI_TRANSITIONS=284} [2024-06-20 16:05:46,865 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 158 predicate places. [2024-06-20 16:05:46,865 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 284 transitions, 3491 flow [2024-06-20 16:05:46,865 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) [2024-06-20 16:05:46,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:05:46,865 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:05:46,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-20 16:05:46,865 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)] === [2024-06-20 16:05:46,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:05:46,866 INFO L85 PathProgramCache]: Analyzing trace with hash 1704653118, now seen corresponding path program 7 times [2024-06-20 16:05:46,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:05:46,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55582657] [2024-06-20 16:05:46,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:05:46,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:05:46,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:05:47,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:05:47,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:05:47,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55582657] [2024-06-20 16:05:47,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55582657] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:05:47,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:05:47,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:05:47,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467519261] [2024-06-20 16:05:47,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:05:47,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:05:47,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:05:47,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:05:47,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:05:48,023 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-20 16:05:48,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 284 transitions, 3491 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) [2024-06-20 16:05:48,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:05:48,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-20 16:05:48,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:05:49,002 INFO L124 PetriNetUnfolderBase]: 3220/4817 cut-off events. [2024-06-20 16:05:49,002 INFO L125 PetriNetUnfolderBase]: For 499843/499857 co-relation queries the response was YES. [2024-06-20 16:05:49,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47505 conditions, 4817 events. 3220/4817 cut-off events. For 499843/499857 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 24536 event pairs, 729 based on Foata normal form. 8/4822 useless extension candidates. Maximal degree in co-relation 47418. Up to 4352 conditions per place. [2024-06-20 16:05:49,052 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 228 selfloop transitions, 86 changer transitions 0/318 dead transitions. [2024-06-20 16:05:49,052 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 318 transitions, 4527 flow [2024-06-20 16:05:49,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:05:49,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:05:49,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 192 transitions. [2024-06-20 16:05:49,053 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44651162790697674 [2024-06-20 16:05:49,053 INFO L175 Difference]: Start difference. First operand has 202 places, 284 transitions, 3491 flow. Second operand 10 states and 192 transitions. [2024-06-20 16:05:49,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 318 transitions, 4527 flow [2024-06-20 16:05:49,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 318 transitions, 4222 flow, removed 47 selfloop flow, removed 7 redundant places. [2024-06-20 16:05:49,793 INFO L231 Difference]: Finished difference. Result has 205 places, 284 transitions, 3372 flow [2024-06-20 16:05:49,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3186, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3372, PETRI_PLACES=205, PETRI_TRANSITIONS=284} [2024-06-20 16:05:49,793 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 161 predicate places. [2024-06-20 16:05:49,794 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 284 transitions, 3372 flow [2024-06-20 16:05:49,794 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) [2024-06-20 16:05:49,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:05:49,794 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:05:49,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-20 16:05:49,794 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)] === [2024-06-20 16:05:49,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:05:49,794 INFO L85 PathProgramCache]: Analyzing trace with hash 857319206, now seen corresponding path program 5 times [2024-06-20 16:05:49,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:05:49,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328486541] [2024-06-20 16:05:49,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:05:49,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:05:49,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:05:50,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:05:50,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:05:50,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328486541] [2024-06-20 16:05:50,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328486541] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:05:50,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:05:50,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:05:50,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256701084] [2024-06-20 16:05:50,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:05:50,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:05:50,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:05:50,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:05:50,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:05:50,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 16:05:50,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 284 transitions, 3372 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) [2024-06-20 16:05:50,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:05:50,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 16:05:50,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:05:51,966 INFO L124 PetriNetUnfolderBase]: 3099/4697 cut-off events. [2024-06-20 16:05:51,967 INFO L125 PetriNetUnfolderBase]: For 507377/507391 co-relation queries the response was YES. [2024-06-20 16:05:51,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45772 conditions, 4697 events. 3099/4697 cut-off events. For 507377/507391 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 24513 event pairs, 693 based on Foata normal form. 16/4710 useless extension candidates. Maximal degree in co-relation 45684. Up to 4044 conditions per place. [2024-06-20 16:05:52,010 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 211 selfloop transitions, 81 changer transitions 0/318 dead transitions. [2024-06-20 16:05:52,011 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 318 transitions, 4396 flow [2024-06-20 16:05:52,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:05:52,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:05:52,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-20 16:05:52,012 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4625322997416021 [2024-06-20 16:05:52,012 INFO L175 Difference]: Start difference. First operand has 205 places, 284 transitions, 3372 flow. Second operand 9 states and 179 transitions. [2024-06-20 16:05:52,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 318 transitions, 4396 flow [2024-06-20 16:05:52,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 318 transitions, 4075 flow, removed 23 selfloop flow, removed 10 redundant places. [2024-06-20 16:05:52,630 INFO L231 Difference]: Finished difference. Result has 204 places, 287 transitions, 3371 flow [2024-06-20 16:05:52,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3053, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3371, PETRI_PLACES=204, PETRI_TRANSITIONS=287} [2024-06-20 16:05:52,630 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 160 predicate places. [2024-06-20 16:05:52,630 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 287 transitions, 3371 flow [2024-06-20 16:05:52,631 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) [2024-06-20 16:05:52,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:05:52,631 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:05:52,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-20 16:05:52,631 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:05:52,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:05:52,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1345089012, now seen corresponding path program 2 times [2024-06-20 16:05:52,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:05:52,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593865002] [2024-06-20 16:05:52,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:05:52,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:05:52,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:05:53,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:05:53,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:05:53,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593865002] [2024-06-20 16:05:53,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593865002] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:05:53,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:05:53,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:05:53,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539216227] [2024-06-20 16:05:53,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:05:53,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:05:53,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:05:53,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:05:53,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:05:53,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 16:05:53,196 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 287 transitions, 3371 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) [2024-06-20 16:05:53,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:05:53,196 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 16:05:53,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:05:54,061 INFO L124 PetriNetUnfolderBase]: 3096/4693 cut-off events. [2024-06-20 16:05:54,062 INFO L125 PetriNetUnfolderBase]: For 518967/518981 co-relation queries the response was YES. [2024-06-20 16:05:54,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45630 conditions, 4693 events. 3096/4693 cut-off events. For 518967/518981 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 24478 event pairs, 754 based on Foata normal form. 11/4701 useless extension candidates. Maximal degree in co-relation 45543. Up to 4388 conditions per place. [2024-06-20 16:05:54,103 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 254 selfloop transitions, 16 changer transitions 0/296 dead transitions. [2024-06-20 16:05:54,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 296 transitions, 3933 flow [2024-06-20 16:05:54,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:05:54,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:05:54,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 109 transitions. [2024-06-20 16:05:54,104 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42248062015503873 [2024-06-20 16:05:54,104 INFO L175 Difference]: Start difference. First operand has 204 places, 287 transitions, 3371 flow. Second operand 6 states and 109 transitions. [2024-06-20 16:05:54,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 296 transitions, 3933 flow [2024-06-20 16:05:54,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 296 transitions, 3625 flow, removed 75 selfloop flow, removed 7 redundant places. [2024-06-20 16:05:54,726 INFO L231 Difference]: Finished difference. Result has 203 places, 287 transitions, 3101 flow [2024-06-20 16:05:54,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3063, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3101, PETRI_PLACES=203, PETRI_TRANSITIONS=287} [2024-06-20 16:05:54,726 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 159 predicate places. [2024-06-20 16:05:54,726 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 287 transitions, 3101 flow [2024-06-20 16:05:54,727 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) [2024-06-20 16:05:54,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:05:54,727 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:05:54,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-20 16:05:54,727 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:05:54,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:05:54,727 INFO L85 PathProgramCache]: Analyzing trace with hash -1032343354, now seen corresponding path program 1 times [2024-06-20 16:05:54,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:05:54,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115470071] [2024-06-20 16:05:54,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:05:54,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:05:54,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:05:55,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:05:55,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:05:55,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115470071] [2024-06-20 16:05:55,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115470071] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:05:55,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:05:55,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:05:55,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506564473] [2024-06-20 16:05:55,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:05:55,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:05:55,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:05:55,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:05:55,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:05:55,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-20 16:05:55,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 287 transitions, 3101 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) [2024-06-20 16:05:55,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:05:55,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-20 16:05:55,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:05:56,114 INFO L124 PetriNetUnfolderBase]: 2821/4412 cut-off events. [2024-06-20 16:05:56,114 INFO L125 PetriNetUnfolderBase]: For 448160/448160 co-relation queries the response was YES. [2024-06-20 16:05:56,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40783 conditions, 4412 events. 2821/4412 cut-off events. For 448160/448160 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 23746 event pairs, 639 based on Foata normal form. 2/4412 useless extension candidates. Maximal degree in co-relation 40695. Up to 3977 conditions per place. [2024-06-20 16:05:56,154 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 257 selfloop transitions, 19 changer transitions 0/303 dead transitions. [2024-06-20 16:05:56,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 303 transitions, 3837 flow [2024-06-20 16:05:56,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:05:56,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:05:56,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 120 transitions. [2024-06-20 16:05:56,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-20 16:05:56,156 INFO L175 Difference]: Start difference. First operand has 203 places, 287 transitions, 3101 flow. Second operand 6 states and 120 transitions. [2024-06-20 16:05:56,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 303 transitions, 3837 flow [2024-06-20 16:05:56,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 303 transitions, 3797 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-20 16:05:56,807 INFO L231 Difference]: Finished difference. Result has 204 places, 290 transitions, 3147 flow [2024-06-20 16:05:56,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3061, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3147, PETRI_PLACES=204, PETRI_TRANSITIONS=290} [2024-06-20 16:05:56,807 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 160 predicate places. [2024-06-20 16:05:56,807 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 290 transitions, 3147 flow [2024-06-20 16:05:56,807 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) [2024-06-20 16:05:56,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:05:56,808 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:05:56,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-20 16:05:56,808 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:05:56,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:05:56,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1344216176, now seen corresponding path program 2 times [2024-06-20 16:05:56,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:05:56,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765728448] [2024-06-20 16:05:56,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:05:56,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:05:56,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:05:57,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:05:57,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:05:57,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765728448] [2024-06-20 16:05:57,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765728448] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:05:57,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:05:57,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:05:57,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843335726] [2024-06-20 16:05:57,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:05:57,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:05:57,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:05:57,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:05:57,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:05:57,467 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-20 16:05:57,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 290 transitions, 3147 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) [2024-06-20 16:05:57,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:05:57,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-20 16:05:57,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:05:58,223 INFO L124 PetriNetUnfolderBase]: 2788/4360 cut-off events. [2024-06-20 16:05:58,223 INFO L125 PetriNetUnfolderBase]: For 458016/458016 co-relation queries the response was YES. [2024-06-20 16:05:58,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40759 conditions, 4360 events. 2788/4360 cut-off events. For 458016/458016 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 23360 event pairs, 637 based on Foata normal form. 1/4359 useless extension candidates. Maximal degree in co-relation 40670. Up to 3959 conditions per place. [2024-06-20 16:05:58,265 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 261 selfloop transitions, 11 changer transitions 0/299 dead transitions. [2024-06-20 16:05:58,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 299 transitions, 3713 flow [2024-06-20 16:05:58,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:05:58,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:05:58,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 112 transitions. [2024-06-20 16:05:58,266 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-06-20 16:05:58,266 INFO L175 Difference]: Start difference. First operand has 204 places, 290 transitions, 3147 flow. Second operand 6 states and 112 transitions. [2024-06-20 16:05:58,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 299 transitions, 3713 flow [2024-06-20 16:05:58,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 299 transitions, 3684 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-20 16:05:58,965 INFO L231 Difference]: Finished difference. Result has 207 places, 290 transitions, 3146 flow [2024-06-20 16:05:58,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3118, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3146, PETRI_PLACES=207, PETRI_TRANSITIONS=290} [2024-06-20 16:05:58,966 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 163 predicate places. [2024-06-20 16:05:58,966 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 290 transitions, 3146 flow [2024-06-20 16:05:58,966 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) [2024-06-20 16:05:58,966 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:05:58,966 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:05:58,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-20 16:05:58,966 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)] === [2024-06-20 16:05:58,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:05:58,967 INFO L85 PathProgramCache]: Analyzing trace with hash -646532328, now seen corresponding path program 1 times [2024-06-20 16:05:58,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:05:58,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383332294] [2024-06-20 16:05:58,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:05:58,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:05:58,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:05:59,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:05:59,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:05:59,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383332294] [2024-06-20 16:05:59,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383332294] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:05:59,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:05:59,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:05:59,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734480921] [2024-06-20 16:05:59,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:05:59,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:05:59,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:05:59,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:05:59,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:06:00,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-20 16:06:00,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 290 transitions, 3146 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) [2024-06-20 16:06:00,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:06:00,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-20 16:06:00,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:06:01,168 INFO L124 PetriNetUnfolderBase]: 3191/4769 cut-off events. [2024-06-20 16:06:01,169 INFO L125 PetriNetUnfolderBase]: For 556152/556152 co-relation queries the response was YES. [2024-06-20 16:06:01,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46301 conditions, 4769 events. 3191/4769 cut-off events. For 556152/556152 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 24205 event pairs, 715 based on Foata normal form. 3/4770 useless extension candidates. Maximal degree in co-relation 46211. Up to 4553 conditions per place. [2024-06-20 16:06:01,216 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 304 selfloop transitions, 40 changer transitions 0/348 dead transitions. [2024-06-20 16:06:01,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 348 transitions, 4756 flow [2024-06-20 16:06:01,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:06:01,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:06:01,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 197 transitions. [2024-06-20 16:06:01,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45813953488372094 [2024-06-20 16:06:01,232 INFO L175 Difference]: Start difference. First operand has 207 places, 290 transitions, 3146 flow. Second operand 10 states and 197 transitions. [2024-06-20 16:06:01,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 348 transitions, 4756 flow [2024-06-20 16:06:01,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 348 transitions, 4709 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-20 16:06:01,717 INFO L231 Difference]: Finished difference. Result has 213 places, 301 transitions, 3549 flow [2024-06-20 16:06:01,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3099, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3549, PETRI_PLACES=213, PETRI_TRANSITIONS=301} [2024-06-20 16:06:01,718 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 169 predicate places. [2024-06-20 16:06:01,718 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 301 transitions, 3549 flow [2024-06-20 16:06:01,718 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) [2024-06-20 16:06:01,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:06:01,718 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:06:01,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-20 16:06:01,719 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)] === [2024-06-20 16:06:01,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:06:01,719 INFO L85 PathProgramCache]: Analyzing trace with hash -642807461, now seen corresponding path program 1 times [2024-06-20 16:06:01,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:06:01,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346098063] [2024-06-20 16:06:01,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:06:01,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:06:01,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:06:02,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:06:02,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:06:02,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346098063] [2024-06-20 16:06:02,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346098063] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:06:02,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:06:02,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:06:02,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613481522] [2024-06-20 16:06:02,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:06:02,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:06:02,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:06:02,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:06:02,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:06:02,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-20 16:06:02,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 301 transitions, 3549 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) [2024-06-20 16:06:02,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:06:02,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-20 16:06:02,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:06:03,671 INFO L124 PetriNetUnfolderBase]: 3227/4818 cut-off events. [2024-06-20 16:06:03,671 INFO L125 PetriNetUnfolderBase]: For 590110/590110 co-relation queries the response was YES. [2024-06-20 16:06:03,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47972 conditions, 4818 events. 3227/4818 cut-off events. For 590110/590110 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 24496 event pairs, 687 based on Foata normal form. 6/4822 useless extension candidates. Maximal degree in co-relation 47879. Up to 4557 conditions per place. [2024-06-20 16:06:03,720 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 307 selfloop transitions, 40 changer transitions 0/351 dead transitions. [2024-06-20 16:06:03,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 351 transitions, 4885 flow [2024-06-20 16:06:03,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:06:03,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:06:03,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-20 16:06:03,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4558139534883721 [2024-06-20 16:06:03,722 INFO L175 Difference]: Start difference. First operand has 213 places, 301 transitions, 3549 flow. Second operand 10 states and 196 transitions. [2024-06-20 16:06:03,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 351 transitions, 4885 flow [2024-06-20 16:06:04,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 351 transitions, 4648 flow, removed 102 selfloop flow, removed 5 redundant places. [2024-06-20 16:06:04,336 INFO L231 Difference]: Finished difference. Result has 218 places, 306 transitions, 3578 flow [2024-06-20 16:06:04,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3312, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3578, PETRI_PLACES=218, PETRI_TRANSITIONS=306} [2024-06-20 16:06:04,336 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 174 predicate places. [2024-06-20 16:06:04,337 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 306 transitions, 3578 flow [2024-06-20 16:06:04,337 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) [2024-06-20 16:06:04,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:06:04,337 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:06:04,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-20 16:06:04,337 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)] === [2024-06-20 16:06:04,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:06:04,337 INFO L85 PathProgramCache]: Analyzing trace with hash -498715121, now seen corresponding path program 2 times [2024-06-20 16:06:04,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:06:04,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784222516] [2024-06-20 16:06:04,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:06:04,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:06:04,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:06:05,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:06:05,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:06:05,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784222516] [2024-06-20 16:06:05,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784222516] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:06:05,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:06:05,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:06:05,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438643459] [2024-06-20 16:06:05,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:06:05,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:06:05,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:06:05,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:06:05,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:06:05,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-20 16:06:05,531 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 306 transitions, 3578 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) [2024-06-20 16:06:05,531 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:06:05,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-20 16:06:05,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:06:06,699 INFO L124 PetriNetUnfolderBase]: 3263/4875 cut-off events. [2024-06-20 16:06:06,699 INFO L125 PetriNetUnfolderBase]: For 612972/612972 co-relation queries the response was YES. [2024-06-20 16:06:06,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49420 conditions, 4875 events. 3263/4875 cut-off events. For 612972/612972 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 24866 event pairs, 671 based on Foata normal form. 6/4879 useless extension candidates. Maximal degree in co-relation 49325. Up to 4466 conditions per place. [2024-06-20 16:06:06,772 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 289 selfloop transitions, 60 changer transitions 0/353 dead transitions. [2024-06-20 16:06:06,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 353 transitions, 4812 flow [2024-06-20 16:06:06,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:06:06,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:06:06,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-20 16:06:06,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4558139534883721 [2024-06-20 16:06:06,773 INFO L175 Difference]: Start difference. First operand has 218 places, 306 transitions, 3578 flow. Second operand 10 states and 196 transitions. [2024-06-20 16:06:06,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 353 transitions, 4812 flow [2024-06-20 16:06:07,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 353 transitions, 4591 flow, removed 78 selfloop flow, removed 7 redundant places. [2024-06-20 16:06:07,784 INFO L231 Difference]: Finished difference. Result has 221 places, 311 transitions, 3673 flow [2024-06-20 16:06:07,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3357, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3673, PETRI_PLACES=221, PETRI_TRANSITIONS=311} [2024-06-20 16:06:07,784 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 177 predicate places. [2024-06-20 16:06:07,784 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 311 transitions, 3673 flow [2024-06-20 16:06:07,785 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) [2024-06-20 16:06:07,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:06:07,785 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:06:07,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-20 16:06:07,785 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)] === [2024-06-20 16:06:07,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:06:07,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1596790327, now seen corresponding path program 3 times [2024-06-20 16:06:07,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:06:07,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007473545] [2024-06-20 16:06:07,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:06:07,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:06:07,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:06:08,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:06:08,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:06:08,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007473545] [2024-06-20 16:06:08,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007473545] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:06:08,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:06:08,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:06:08,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65307065] [2024-06-20 16:06:08,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:06:08,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:06:08,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:06:08,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:06:08,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:06:09,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-20 16:06:09,010 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 311 transitions, 3673 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) [2024-06-20 16:06:09,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:06:09,010 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-20 16:06:09,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:06:10,183 INFO L124 PetriNetUnfolderBase]: 3329/4969 cut-off events. [2024-06-20 16:06:10,184 INFO L125 PetriNetUnfolderBase]: For 646063/646063 co-relation queries the response was YES. [2024-06-20 16:06:10,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51621 conditions, 4969 events. 3329/4969 cut-off events. For 646063/646063 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 25368 event pairs, 673 based on Foata normal form. 3/4970 useless extension candidates. Maximal degree in co-relation 51525. Up to 4476 conditions per place. [2024-06-20 16:06:10,241 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 286 selfloop transitions, 78 changer transitions 0/368 dead transitions. [2024-06-20 16:06:10,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 368 transitions, 5369 flow [2024-06-20 16:06:10,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:06:10,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:06:10,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 217 transitions. [2024-06-20 16:06:10,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4587737843551797 [2024-06-20 16:06:10,243 INFO L175 Difference]: Start difference. First operand has 221 places, 311 transitions, 3673 flow. Second operand 11 states and 217 transitions. [2024-06-20 16:06:10,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 368 transitions, 5369 flow [2024-06-20 16:06:10,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 368 transitions, 5113 flow, removed 83 selfloop flow, removed 7 redundant places. [2024-06-20 16:06:10,916 INFO L231 Difference]: Finished difference. Result has 226 places, 320 transitions, 3965 flow [2024-06-20 16:06:10,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3417, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3965, PETRI_PLACES=226, PETRI_TRANSITIONS=320} [2024-06-20 16:06:10,917 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 182 predicate places. [2024-06-20 16:06:10,917 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 320 transitions, 3965 flow [2024-06-20 16:06:10,917 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) [2024-06-20 16:06:10,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:06:10,917 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:06:10,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-20 16:06:10,917 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)] === [2024-06-20 16:06:10,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:06:10,918 INFO L85 PathProgramCache]: Analyzing trace with hash -1596999577, now seen corresponding path program 4 times [2024-06-20 16:06:10,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:06:10,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142585694] [2024-06-20 16:06:10,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:06:10,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:06:10,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:06:12,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:06:12,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:06:12,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142585694] [2024-06-20 16:06:12,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142585694] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:06:12,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:06:12,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:06:12,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205643004] [2024-06-20 16:06:12,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:06:12,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:06:12,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:06:12,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:06:12,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:06:12,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-20 16:06:12,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 320 transitions, 3965 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) [2024-06-20 16:06:12,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:06:12,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-20 16:06:12,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:06:13,110 INFO L124 PetriNetUnfolderBase]: 3317/4956 cut-off events. [2024-06-20 16:06:13,111 INFO L125 PetriNetUnfolderBase]: For 659699/659699 co-relation queries the response was YES. [2024-06-20 16:06:13,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52102 conditions, 4956 events. 3317/4956 cut-off events. For 659699/659699 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 25337 event pairs, 681 based on Foata normal form. 6/4960 useless extension candidates. Maximal degree in co-relation 52004. Up to 4544 conditions per place. [2024-06-20 16:06:13,165 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 304 selfloop transitions, 55 changer transitions 0/363 dead transitions. [2024-06-20 16:06:13,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 363 transitions, 5197 flow [2024-06-20 16:06:13,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:06:13,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:06:13,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 197 transitions. [2024-06-20 16:06:13,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45813953488372094 [2024-06-20 16:06:13,167 INFO L175 Difference]: Start difference. First operand has 226 places, 320 transitions, 3965 flow. Second operand 10 states and 197 transitions. [2024-06-20 16:06:13,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 363 transitions, 5197 flow [2024-06-20 16:06:14,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 363 transitions, 4821 flow, removed 150 selfloop flow, removed 7 redundant places. [2024-06-20 16:06:14,096 INFO L231 Difference]: Finished difference. Result has 229 places, 320 transitions, 3709 flow [2024-06-20 16:06:14,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3589, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3709, PETRI_PLACES=229, PETRI_TRANSITIONS=320} [2024-06-20 16:06:14,098 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 185 predicate places. [2024-06-20 16:06:14,098 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 320 transitions, 3709 flow [2024-06-20 16:06:14,098 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) [2024-06-20 16:06:14,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:06:14,105 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:06:14,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-20 16:06:14,105 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:06:14,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:06:14,106 INFO L85 PathProgramCache]: Analyzing trace with hash -498707402, now seen corresponding path program 1 times [2024-06-20 16:06:14,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:06:14,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443363125] [2024-06-20 16:06:14,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:06:14,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:06:14,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:06:15,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:06:15,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:06:15,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443363125] [2024-06-20 16:06:15,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443363125] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:06:15,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:06:15,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:06:15,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036901309] [2024-06-20 16:06:15,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:06:15,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:06:15,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:06:15,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:06:15,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:06:15,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-20 16:06:15,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 320 transitions, 3709 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) [2024-06-20 16:06:15,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:06:15,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-20 16:06:15,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:06:16,427 INFO L124 PetriNetUnfolderBase]: 3345/4995 cut-off events. [2024-06-20 16:06:16,427 INFO L125 PetriNetUnfolderBase]: For 678137/678137 co-relation queries the response was YES. [2024-06-20 16:06:16,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52510 conditions, 4995 events. 3345/4995 cut-off events. For 678137/678137 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 25516 event pairs, 692 based on Foata normal form. 6/4999 useless extension candidates. Maximal degree in co-relation 52410. Up to 4784 conditions per place. [2024-06-20 16:06:16,484 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 322 selfloop transitions, 37 changer transitions 0/363 dead transitions. [2024-06-20 16:06:16,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 363 transitions, 4939 flow [2024-06-20 16:06:16,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:06:16,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:06:16,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-20 16:06:16,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43953488372093025 [2024-06-20 16:06:16,485 INFO L175 Difference]: Start difference. First operand has 229 places, 320 transitions, 3709 flow. Second operand 10 states and 189 transitions. [2024-06-20 16:06:16,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 363 transitions, 4939 flow [2024-06-20 16:06:17,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 363 transitions, 4809 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-20 16:06:17,272 INFO L231 Difference]: Finished difference. Result has 231 places, 323 transitions, 3823 flow [2024-06-20 16:06:17,272 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3579, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3823, PETRI_PLACES=231, PETRI_TRANSITIONS=323} [2024-06-20 16:06:17,272 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 187 predicate places. [2024-06-20 16:06:17,272 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 323 transitions, 3823 flow [2024-06-20 16:06:17,272 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) [2024-06-20 16:06:17,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:06:17,273 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:06:17,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-20 16:06:17,273 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:06:17,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:06:17,273 INFO L85 PathProgramCache]: Analyzing trace with hash -398507498, now seen corresponding path program 1 times [2024-06-20 16:06:17,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:06:17,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276888942] [2024-06-20 16:06:17,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:06:17,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:06:17,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:06:17,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:06:17,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:06:17,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276888942] [2024-06-20 16:06:17,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276888942] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:06:17,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:06:17,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:06:17,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652799617] [2024-06-20 16:06:17,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:06:17,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:06:17,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:06:17,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:06:17,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:06:18,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-20 16:06:18,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 323 transitions, 3823 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) [2024-06-20 16:06:18,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:06:18,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-20 16:06:18,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:06:19,075 INFO L124 PetriNetUnfolderBase]: 3350/5002 cut-off events. [2024-06-20 16:06:19,076 INFO L125 PetriNetUnfolderBase]: For 685908/685908 co-relation queries the response was YES. [2024-06-20 16:06:19,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52909 conditions, 5002 events. 3350/5002 cut-off events. For 685908/685908 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 25555 event pairs, 700 based on Foata normal form. 1/5001 useless extension candidates. Maximal degree in co-relation 52808. Up to 4862 conditions per place. [2024-06-20 16:06:19,135 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 321 selfloop transitions, 24 changer transitions 0/349 dead transitions. [2024-06-20 16:06:19,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 349 transitions, 4760 flow [2024-06-20 16:06:19,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:06:19,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:06:19,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-20 16:06:19,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43521594684385384 [2024-06-20 16:06:19,136 INFO L175 Difference]: Start difference. First operand has 231 places, 323 transitions, 3823 flow. Second operand 7 states and 131 transitions. [2024-06-20 16:06:19,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 349 transitions, 4760 flow [2024-06-20 16:06:19,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 349 transitions, 4544 flow, removed 75 selfloop flow, removed 7 redundant places. [2024-06-20 16:06:19,971 INFO L231 Difference]: Finished difference. Result has 231 places, 326 transitions, 3720 flow [2024-06-20 16:06:19,971 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3612, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3720, PETRI_PLACES=231, PETRI_TRANSITIONS=326} [2024-06-20 16:06:19,971 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 187 predicate places. [2024-06-20 16:06:19,971 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 326 transitions, 3720 flow [2024-06-20 16:06:19,972 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) [2024-06-20 16:06:19,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:06:19,972 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:06:19,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-20 16:06:19,972 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)] === [2024-06-20 16:06:19,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:06:19,972 INFO L85 PathProgramCache]: Analyzing trace with hash -544780283, now seen corresponding path program 5 times [2024-06-20 16:06:19,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:06:19,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765517695] [2024-06-20 16:06:19,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:06:19,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:06:19,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:06:21,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:06:21,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:06:21,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765517695] [2024-06-20 16:06:21,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765517695] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:06:21,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:06:21,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:06:21,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696731901] [2024-06-20 16:06:21,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:06:21,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:06:21,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:06:21,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:06:21,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:06:21,144 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-20 16:06:21,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 326 transitions, 3720 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) [2024-06-20 16:06:21,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:06:21,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-20 16:06:21,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:06:22,203 INFO L124 PetriNetUnfolderBase]: 3386/5061 cut-off events. [2024-06-20 16:06:22,203 INFO L125 PetriNetUnfolderBase]: For 717936/717936 co-relation queries the response was YES. [2024-06-20 16:06:22,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53418 conditions, 5061 events. 3386/5061 cut-off events. For 717936/717936 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 25998 event pairs, 681 based on Foata normal form. 6/5065 useless extension candidates. Maximal degree in co-relation 53316. Up to 4417 conditions per place. [2024-06-20 16:06:22,266 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 287 selfloop transitions, 81 changer transitions 0/372 dead transitions. [2024-06-20 16:06:22,266 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 372 transitions, 5316 flow [2024-06-20 16:06:22,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:06:22,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:06:22,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 198 transitions. [2024-06-20 16:06:22,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4604651162790698 [2024-06-20 16:06:22,274 INFO L175 Difference]: Start difference. First operand has 231 places, 326 transitions, 3720 flow. Second operand 10 states and 198 transitions. [2024-06-20 16:06:22,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 372 transitions, 5316 flow [2024-06-20 16:06:23,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 372 transitions, 5248 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-20 16:06:23,092 INFO L231 Difference]: Finished difference. Result has 236 places, 331 transitions, 4036 flow [2024-06-20 16:06:23,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3652, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4036, PETRI_PLACES=236, PETRI_TRANSITIONS=331} [2024-06-20 16:06:23,092 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 192 predicate places. [2024-06-20 16:06:23,092 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 331 transitions, 4036 flow [2024-06-20 16:06:23,092 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) [2024-06-20 16:06:23,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:06:23,093 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:06:23,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-20 16:06:23,093 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)] === [2024-06-20 16:06:23,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:06:23,093 INFO L85 PathProgramCache]: Analyzing trace with hash -544578473, now seen corresponding path program 6 times [2024-06-20 16:06:23,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:06:23,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048469724] [2024-06-20 16:06:23,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:06:23,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:06:23,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:06:24,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:06:24,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:06:24,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048469724] [2024-06-20 16:06:24,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048469724] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:06:24,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:06:24,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:06:24,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836169291] [2024-06-20 16:06:24,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:06:24,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:06:24,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:06:24,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:06:24,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:06:24,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-20 16:06:24,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 331 transitions, 4036 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) [2024-06-20 16:06:24,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:06:24,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-20 16:06:24,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:06:25,310 INFO L124 PetriNetUnfolderBase]: 3422/5106 cut-off events. [2024-06-20 16:06:25,310 INFO L125 PetriNetUnfolderBase]: For 749344/749344 co-relation queries the response was YES. [2024-06-20 16:06:25,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55596 conditions, 5106 events. 3422/5106 cut-off events. For 749344/749344 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 26187 event pairs, 681 based on Foata normal form. 6/5110 useless extension candidates. Maximal degree in co-relation 55493. Up to 4469 conditions per place. [2024-06-20 16:06:25,489 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 291 selfloop transitions, 82 changer transitions 0/377 dead transitions. [2024-06-20 16:06:25,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 377 transitions, 5544 flow [2024-06-20 16:06:25,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:06:25,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:06:25,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 199 transitions. [2024-06-20 16:06:25,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4627906976744186 [2024-06-20 16:06:25,490 INFO L175 Difference]: Start difference. First operand has 236 places, 331 transitions, 4036 flow. Second operand 10 states and 199 transitions. [2024-06-20 16:06:25,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 377 transitions, 5544 flow [2024-06-20 16:06:26,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 377 transitions, 5196 flow, removed 96 selfloop flow, removed 8 redundant places. [2024-06-20 16:06:26,309 INFO L231 Difference]: Finished difference. Result has 238 places, 336 transitions, 4084 flow [2024-06-20 16:06:26,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3688, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4084, PETRI_PLACES=238, PETRI_TRANSITIONS=336} [2024-06-20 16:06:26,310 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 194 predicate places. [2024-06-20 16:06:26,310 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 336 transitions, 4084 flow [2024-06-20 16:06:26,310 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) [2024-06-20 16:06:26,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:06:26,310 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:06:26,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-20 16:06:26,311 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)] === [2024-06-20 16:06:26,311 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:06:26,311 INFO L85 PathProgramCache]: Analyzing trace with hash 32321958, now seen corresponding path program 2 times [2024-06-20 16:06:26,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:06:26,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213906757] [2024-06-20 16:06:26,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:06:26,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:06:26,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:06:27,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:06:27,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:06:27,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213906757] [2024-06-20 16:06:27,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213906757] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:06:27,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:06:27,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:06:27,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448167829] [2024-06-20 16:06:27,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:06:27,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:06:27,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:06:27,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:06:27,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:06:27,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-20 16:06:27,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 336 transitions, 4084 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) [2024-06-20 16:06:27,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:06:27,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-20 16:06:27,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:06:28,708 INFO L124 PetriNetUnfolderBase]: 3450/5150 cut-off events. [2024-06-20 16:06:28,708 INFO L125 PetriNetUnfolderBase]: For 773346/773346 co-relation queries the response was YES. [2024-06-20 16:06:28,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56563 conditions, 5150 events. 3450/5150 cut-off events. For 773346/773346 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 26459 event pairs, 701 based on Foata normal form. 6/5154 useless extension candidates. Maximal degree in co-relation 56459. Up to 4851 conditions per place. [2024-06-20 16:06:28,763 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 319 selfloop transitions, 54 changer transitions 0/377 dead transitions. [2024-06-20 16:06:28,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 377 transitions, 5502 flow [2024-06-20 16:06:28,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:06:28,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:06:28,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-20 16:06:28,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-20 16:06:28,765 INFO L175 Difference]: Start difference. First operand has 238 places, 336 transitions, 4084 flow. Second operand 10 states and 190 transitions. [2024-06-20 16:06:28,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 377 transitions, 5502 flow [2024-06-20 16:06:29,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 377 transitions, 5163 flow, removed 101 selfloop flow, removed 7 redundant places. [2024-06-20 16:06:29,337 INFO L231 Difference]: Finished difference. Result has 241 places, 339 transitions, 4037 flow [2024-06-20 16:06:29,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3745, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4037, PETRI_PLACES=241, PETRI_TRANSITIONS=339} [2024-06-20 16:06:29,337 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 197 predicate places. [2024-06-20 16:06:29,337 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 339 transitions, 4037 flow [2024-06-20 16:06:29,337 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) [2024-06-20 16:06:29,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:06:29,338 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:06:29,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-20 16:06:29,338 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)] === [2024-06-20 16:06:29,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:06:29,338 INFO L85 PathProgramCache]: Analyzing trace with hash -1457083317, now seen corresponding path program 7 times [2024-06-20 16:06:29,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:06:29,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859489061] [2024-06-20 16:06:29,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:06:29,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:06:29,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:06:30,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:06:30,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:06:30,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859489061] [2024-06-20 16:06:30,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859489061] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:06:30,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:06:30,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:06:30,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351324276] [2024-06-20 16:06:30,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:06:30,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:06:30,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:06:30,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:06:30,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:06:30,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-20 16:06:30,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 339 transitions, 4037 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) [2024-06-20 16:06:30,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:06:30,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-20 16:06:30,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:06:31,684 INFO L124 PetriNetUnfolderBase]: 3468/5183 cut-off events. [2024-06-20 16:06:31,684 INFO L125 PetriNetUnfolderBase]: For 783678/783678 co-relation queries the response was YES. [2024-06-20 16:06:31,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56656 conditions, 5183 events. 3468/5183 cut-off events. For 783678/783678 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 26726 event pairs, 686 based on Foata normal form. 3/5184 useless extension candidates. Maximal degree in co-relation 56551. Up to 4487 conditions per place. [2024-06-20 16:06:31,742 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 289 selfloop transitions, 95 changer transitions 0/388 dead transitions. [2024-06-20 16:06:31,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 388 transitions, 5581 flow [2024-06-20 16:06:31,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:06:31,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:06:31,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 218 transitions. [2024-06-20 16:06:31,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4608879492600423 [2024-06-20 16:06:31,744 INFO L175 Difference]: Start difference. First operand has 241 places, 339 transitions, 4037 flow. Second operand 11 states and 218 transitions. [2024-06-20 16:06:31,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 388 transitions, 5581 flow [2024-06-20 16:06:32,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 388 transitions, 5313 flow, removed 82 selfloop flow, removed 8 redundant places. [2024-06-20 16:06:32,640 INFO L231 Difference]: Finished difference. Result has 244 places, 343 transitions, 4178 flow [2024-06-20 16:06:32,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3769, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4178, PETRI_PLACES=244, PETRI_TRANSITIONS=343} [2024-06-20 16:06:32,640 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 200 predicate places. [2024-06-20 16:06:32,640 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 343 transitions, 4178 flow [2024-06-20 16:06:32,641 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) [2024-06-20 16:06:32,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:06:32,641 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:06:32,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-20 16:06:32,641 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)] === [2024-06-20 16:06:32,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:06:32,641 INFO L85 PathProgramCache]: Analyzing trace with hash 560930502, now seen corresponding path program 3 times [2024-06-20 16:06:32,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:06:32,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383177361] [2024-06-20 16:06:32,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:06:32,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:06:32,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:06:33,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:06:33,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:06:33,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383177361] [2024-06-20 16:06:33,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383177361] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:06:33,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:06:33,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:06:33,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042493740] [2024-06-20 16:06:33,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:06:33,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:06:33,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:06:33,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:06:33,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:06:33,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-20 16:06:33,846 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 343 transitions, 4178 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) [2024-06-20 16:06:33,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:06:33,846 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-20 16:06:33,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:06:34,976 INFO L124 PetriNetUnfolderBase]: 3534/5278 cut-off events. [2024-06-20 16:06:34,976 INFO L125 PetriNetUnfolderBase]: For 837642/837642 co-relation queries the response was YES. [2024-06-20 16:06:35,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59211 conditions, 5278 events. 3534/5278 cut-off events. For 837642/837642 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 27276 event pairs, 694 based on Foata normal form. 6/5282 useless extension candidates. Maximal degree in co-relation 59105. Up to 4812 conditions per place. [2024-06-20 16:06:35,038 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 304 selfloop transitions, 81 changer transitions 0/389 dead transitions. [2024-06-20 16:06:35,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 389 transitions, 5952 flow [2024-06-20 16:06:35,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:06:35,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:06:35,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-20 16:06:35,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44883720930232557 [2024-06-20 16:06:35,039 INFO L175 Difference]: Start difference. First operand has 244 places, 343 transitions, 4178 flow. Second operand 10 states and 193 transitions. [2024-06-20 16:06:35,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 389 transitions, 5952 flow [2024-06-20 16:06:35,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 389 transitions, 5593 flow, removed 90 selfloop flow, removed 9 redundant places. [2024-06-20 16:06:35,932 INFO L231 Difference]: Finished difference. Result has 245 places, 349 transitions, 4355 flow [2024-06-20 16:06:35,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3819, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4355, PETRI_PLACES=245, PETRI_TRANSITIONS=349} [2024-06-20 16:06:35,932 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 201 predicate places. [2024-06-20 16:06:35,932 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 349 transitions, 4355 flow [2024-06-20 16:06:35,932 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) [2024-06-20 16:06:35,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:06:35,933 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:06:35,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-20 16:06:35,933 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)] === [2024-06-20 16:06:35,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:06:35,933 INFO L85 PathProgramCache]: Analyzing trace with hash -1449673728, now seen corresponding path program 4 times [2024-06-20 16:06:35,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:06:35,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31499962] [2024-06-20 16:06:35,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:06:35,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:06:35,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:06:36,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:06:36,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:06:36,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31499962] [2024-06-20 16:06:36,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31499962] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:06:36,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:06:36,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:06:36,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303206823] [2024-06-20 16:06:36,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:06:36,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:06:36,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:06:36,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:06:36,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:06:37,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-20 16:06:37,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 349 transitions, 4355 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) [2024-06-20 16:06:37,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:06:37,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-20 16:06:37,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:06:38,314 INFO L124 PetriNetUnfolderBase]: 3524/5264 cut-off events. [2024-06-20 16:06:38,314 INFO L125 PetriNetUnfolderBase]: For 842414/842414 co-relation queries the response was YES. [2024-06-20 16:06:38,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58751 conditions, 5264 events. 3524/5264 cut-off events. For 842414/842414 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 27187 event pairs, 704 based on Foata normal form. 6/5268 useless extension candidates. Maximal degree in co-relation 58644. Up to 4918 conditions per place. [2024-06-20 16:06:38,375 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 315 selfloop transitions, 71 changer transitions 0/390 dead transitions. [2024-06-20 16:06:38,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 390 transitions, 5513 flow [2024-06-20 16:06:38,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:06:38,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:06:38,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 207 transitions. [2024-06-20 16:06:38,376 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4376321353065539 [2024-06-20 16:06:38,377 INFO L175 Difference]: Start difference. First operand has 245 places, 349 transitions, 4355 flow. Second operand 11 states and 207 transitions. [2024-06-20 16:06:38,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 390 transitions, 5513 flow [2024-06-20 16:06:39,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 390 transitions, 5118 flow, removed 166 selfloop flow, removed 5 redundant places. [2024-06-20 16:06:39,424 INFO L231 Difference]: Finished difference. Result has 251 places, 349 transitions, 4110 flow [2024-06-20 16:06:39,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3960, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4110, PETRI_PLACES=251, PETRI_TRANSITIONS=349} [2024-06-20 16:06:39,424 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 207 predicate places. [2024-06-20 16:06:39,425 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 349 transitions, 4110 flow [2024-06-20 16:06:39,425 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) [2024-06-20 16:06:39,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:06:39,425 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:06:39,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-20 16:06:39,425 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)] === [2024-06-20 16:06:39,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:06:39,425 INFO L85 PathProgramCache]: Analyzing trace with hash 560920923, now seen corresponding path program 8 times [2024-06-20 16:06:39,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:06:39,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083182189] [2024-06-20 16:06:39,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:06:39,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:06:39,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:06:40,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:06:40,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:06:40,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083182189] [2024-06-20 16:06:40,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083182189] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:06:40,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:06:40,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:06:40,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105904655] [2024-06-20 16:06:40,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:06:40,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:06:40,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:06:40,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:06:40,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:06:40,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-20 16:06:40,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 349 transitions, 4110 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) [2024-06-20 16:06:40,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:06:40,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-20 16:06:40,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:06:41,838 INFO L124 PetriNetUnfolderBase]: 3584/5367 cut-off events. [2024-06-20 16:06:41,838 INFO L125 PetriNetUnfolderBase]: For 854879/854879 co-relation queries the response was YES. [2024-06-20 16:06:41,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59648 conditions, 5367 events. 3584/5367 cut-off events. For 854879/854879 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 27967 event pairs, 655 based on Foata normal form. 3/5368 useless extension candidates. Maximal degree in co-relation 59539. Up to 4723 conditions per place. [2024-06-20 16:06:41,909 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 314 selfloop transitions, 131 changer transitions 0/449 dead transitions. [2024-06-20 16:06:41,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 449 transitions, 6640 flow [2024-06-20 16:06:41,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:06:41,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:06:41,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-20 16:06:41,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4558139534883721 [2024-06-20 16:06:41,911 INFO L175 Difference]: Start difference. First operand has 251 places, 349 transitions, 4110 flow. Second operand 10 states and 196 transitions. [2024-06-20 16:06:41,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 449 transitions, 6640 flow [2024-06-20 16:06:43,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 449 transitions, 6462 flow, removed 8 selfloop flow, removed 10 redundant places. [2024-06-20 16:06:43,282 INFO L231 Difference]: Finished difference. Result has 255 places, 408 transitions, 5421 flow [2024-06-20 16:06:43,282 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3940, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5421, PETRI_PLACES=255, PETRI_TRANSITIONS=408} [2024-06-20 16:06:43,282 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 211 predicate places. [2024-06-20 16:06:43,282 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 408 transitions, 5421 flow [2024-06-20 16:06:43,282 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) [2024-06-20 16:06:43,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:06:43,283 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:06:43,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-20 16:06:43,283 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:06:43,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:06:43,283 INFO L85 PathProgramCache]: Analyzing trace with hash 560654013, now seen corresponding path program 9 times [2024-06-20 16:06:43,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:06:43,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823264452] [2024-06-20 16:06:43,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:06:43,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:06:43,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:06:44,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:06:44,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:06:44,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823264452] [2024-06-20 16:06:44,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823264452] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:06:44,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:06:44,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:06:44,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096327849] [2024-06-20 16:06:44,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:06:44,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:06:44,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:06:44,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:06:44,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:06:44,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-20 16:06:44,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 408 transitions, 5421 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) [2024-06-20 16:06:44,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:06:44,553 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-20 16:06:44,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:06:45,869 INFO L124 PetriNetUnfolderBase]: 3620/5408 cut-off events. [2024-06-20 16:06:45,869 INFO L125 PetriNetUnfolderBase]: For 899805/899805 co-relation queries the response was YES. [2024-06-20 16:06:45,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62329 conditions, 5408 events. 3620/5408 cut-off events. For 899805/899805 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 28077 event pairs, 667 based on Foata normal form. 6/5412 useless extension candidates. Maximal degree in co-relation 62215. Up to 4765 conditions per place. [2024-06-20 16:06:45,933 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 321 selfloop transitions, 128 changer transitions 0/453 dead transitions. [2024-06-20 16:06:45,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 453 transitions, 7168 flow [2024-06-20 16:06:45,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:06:45,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:06:45,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-20 16:06:45,934 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4558139534883721 [2024-06-20 16:06:45,934 INFO L175 Difference]: Start difference. First operand has 255 places, 408 transitions, 5421 flow. Second operand 10 states and 196 transitions. [2024-06-20 16:06:45,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 453 transitions, 7168 flow [2024-06-20 16:06:47,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 453 transitions, 6867 flow, removed 138 selfloop flow, removed 3 redundant places. [2024-06-20 16:06:47,077 INFO L231 Difference]: Finished difference. Result has 262 places, 416 transitions, 5868 flow [2024-06-20 16:06:47,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5156, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5868, PETRI_PLACES=262, PETRI_TRANSITIONS=416} [2024-06-20 16:06:47,078 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 218 predicate places. [2024-06-20 16:06:47,078 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 416 transitions, 5868 flow [2024-06-20 16:06:47,078 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) [2024-06-20 16:06:47,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:06:47,078 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:06:47,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-20 16:06:47,079 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:06:47,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:06:47,079 INFO L85 PathProgramCache]: Analyzing trace with hash -537421193, now seen corresponding path program 10 times [2024-06-20 16:06:47,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:06:47,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125242880] [2024-06-20 16:06:47,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:06:47,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:06:47,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:06:48,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:06:48,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:06:48,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125242880] [2024-06-20 16:06:48,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125242880] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:06:48,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:06:48,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:06:48,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363191434] [2024-06-20 16:06:48,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:06:48,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:06:48,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:06:48,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:06:48,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:06:48,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-20 16:06:48,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 416 transitions, 5868 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) [2024-06-20 16:06:48,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:06:48,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-20 16:06:48,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:06:49,483 INFO L124 PetriNetUnfolderBase]: 3614/5400 cut-off events. [2024-06-20 16:06:49,483 INFO L125 PetriNetUnfolderBase]: For 904065/904065 co-relation queries the response was YES. [2024-06-20 16:06:49,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62464 conditions, 5400 events. 3614/5400 cut-off events. For 904065/904065 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 28088 event pairs, 667 based on Foata normal form. 3/5401 useless extension candidates. Maximal degree in co-relation 62348. Up to 4731 conditions per place. [2024-06-20 16:06:49,554 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 317 selfloop transitions, 136 changer transitions 0/457 dead transitions. [2024-06-20 16:06:49,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 457 transitions, 7175 flow [2024-06-20 16:06:49,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:06:49,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:06:49,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 213 transitions. [2024-06-20 16:06:49,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4503171247357294 [2024-06-20 16:06:49,556 INFO L175 Difference]: Start difference. First operand has 262 places, 416 transitions, 5868 flow. Second operand 11 states and 213 transitions. [2024-06-20 16:06:49,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 457 transitions, 7175 flow [2024-06-20 16:06:51,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 457 transitions, 6495 flow, removed 250 selfloop flow, removed 7 redundant places. [2024-06-20 16:06:51,020 INFO L231 Difference]: Finished difference. Result has 266 places, 416 transitions, 5479 flow [2024-06-20 16:06:51,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5188, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5479, PETRI_PLACES=266, PETRI_TRANSITIONS=416} [2024-06-20 16:06:51,020 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 222 predicate places. [2024-06-20 16:06:51,021 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 416 transitions, 5479 flow [2024-06-20 16:06:51,021 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) [2024-06-20 16:06:51,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:06:51,021 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:06:51,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-20 16:06:51,021 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:06:51,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:06:51,022 INFO L85 PathProgramCache]: Analyzing trace with hash -398149448, now seen corresponding path program 2 times [2024-06-20 16:06:51,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:06:51,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361726123] [2024-06-20 16:06:51,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:06:51,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:06:51,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:06:51,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:06:51,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:06:51,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361726123] [2024-06-20 16:06:51,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361726123] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:06:51,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:06:51,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:06:51,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142412094] [2024-06-20 16:06:51,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:06:51,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:06:51,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:06:51,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:06:51,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:06:51,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-20 16:06:51,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 416 transitions, 5479 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) [2024-06-20 16:06:51,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:06:51,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-20 16:06:51,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:06:53,042 INFO L124 PetriNetUnfolderBase]: 3619/5407 cut-off events. [2024-06-20 16:06:53,042 INFO L125 PetriNetUnfolderBase]: For 910650/910650 co-relation queries the response was YES. [2024-06-20 16:06:53,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62172 conditions, 5407 events. 3619/5407 cut-off events. For 910650/910650 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 28109 event pairs, 678 based on Foata normal form. 1/5406 useless extension candidates. Maximal degree in co-relation 62055. Up to 5260 conditions per place. [2024-06-20 16:06:53,110 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 406 selfloop transitions, 26 changer transitions 0/436 dead transitions. [2024-06-20 16:06:53,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 436 transitions, 6600 flow [2024-06-20 16:06:53,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:06:53,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:06:53,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-20 16:06:53,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-20 16:06:53,111 INFO L175 Difference]: Start difference. First operand has 266 places, 416 transitions, 5479 flow. Second operand 7 states and 126 transitions. [2024-06-20 16:06:53,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 436 transitions, 6600 flow [2024-06-20 16:06:54,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 436 transitions, 6255 flow, removed 37 selfloop flow, removed 10 redundant places. [2024-06-20 16:06:54,401 INFO L231 Difference]: Finished difference. Result has 263 places, 419 transitions, 5257 flow [2024-06-20 16:06:54,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5138, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=393, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5257, PETRI_PLACES=263, PETRI_TRANSITIONS=419} [2024-06-20 16:06:54,403 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 219 predicate places. [2024-06-20 16:06:54,403 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 419 transitions, 5257 flow [2024-06-20 16:06:54,403 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) [2024-06-20 16:06:54,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:06:54,403 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:06:54,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-20 16:06:54,403 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:06:54,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:06:54,404 INFO L85 PathProgramCache]: Analyzing trace with hash -1041212328, now seen corresponding path program 1 times [2024-06-20 16:06:54,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:06:54,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657820278] [2024-06-20 16:06:54,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:06:54,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:06:54,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:06:55,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:06:55,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:06:55,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657820278] [2024-06-20 16:06:55,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657820278] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:06:55,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:06:55,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:06:55,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411407625] [2024-06-20 16:06:55,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:06:55,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:06:55,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:06:55,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:06:55,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:06:55,213 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 16:06:55,213 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 419 transitions, 5257 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) [2024-06-20 16:06:55,214 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:06:55,214 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 16:06:55,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:06:56,451 INFO L124 PetriNetUnfolderBase]: 3452/5242 cut-off events. [2024-06-20 16:06:56,451 INFO L125 PetriNetUnfolderBase]: For 924304/924304 co-relation queries the response was YES. [2024-06-20 16:06:56,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60302 conditions, 5242 events. 3452/5242 cut-off events. For 924304/924304 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 27870 event pairs, 678 based on Foata normal form. 1/5241 useless extension candidates. Maximal degree in co-relation 60185. Up to 4872 conditions per place. [2024-06-20 16:06:56,515 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 389 selfloop transitions, 23 changer transitions 0/445 dead transitions. [2024-06-20 16:06:56,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 445 transitions, 6389 flow [2024-06-20 16:06:56,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:06:56,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:06:56,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-20 16:06:56,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43853820598006643 [2024-06-20 16:06:56,516 INFO L175 Difference]: Start difference. First operand has 263 places, 419 transitions, 5257 flow. Second operand 7 states and 132 transitions. [2024-06-20 16:06:56,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 445 transitions, 6389 flow [2024-06-20 16:06:57,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 445 transitions, 6331 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-20 16:06:57,919 INFO L231 Difference]: Finished difference. Result has 267 places, 428 transitions, 5383 flow [2024-06-20 16:06:57,919 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5199, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5383, PETRI_PLACES=267, PETRI_TRANSITIONS=428} [2024-06-20 16:06:57,919 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 223 predicate places. [2024-06-20 16:06:57,919 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 428 transitions, 5383 flow [2024-06-20 16:06:57,920 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) [2024-06-20 16:06:57,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:06:57,920 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:06:57,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-20 16:06:57,920 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)] === [2024-06-20 16:06:57,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:06:57,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1866500722, now seen corresponding path program 5 times [2024-06-20 16:06:57,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:06:57,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525448390] [2024-06-20 16:06:57,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:06:57,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:06:57,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:06:58,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:06:58,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:06:58,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525448390] [2024-06-20 16:06:58,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525448390] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:06:58,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:06:58,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:06:58,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468744235] [2024-06-20 16:06:58,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:06:58,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:06:58,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:06:58,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:06:58,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:06:59,044 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-20 16:06:59,045 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 428 transitions, 5383 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) [2024-06-20 16:06:59,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:06:59,045 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-20 16:06:59,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:07:00,405 INFO L124 PetriNetUnfolderBase]: 3649/5456 cut-off events. [2024-06-20 16:07:00,405 INFO L125 PetriNetUnfolderBase]: For 971289/971303 co-relation queries the response was YES. [2024-06-20 16:07:00,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62976 conditions, 5456 events. 3649/5456 cut-off events. For 971289/971303 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 28359 event pairs, 697 based on Foata normal form. 11/5464 useless extension candidates. Maximal degree in co-relation 62857. Up to 4834 conditions per place. [2024-06-20 16:07:00,472 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 325 selfloop transitions, 144 changer transitions 0/473 dead transitions. [2024-06-20 16:07:00,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 473 transitions, 6927 flow [2024-06-20 16:07:00,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 16:07:00,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 16:07:00,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 225 transitions. [2024-06-20 16:07:00,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-20 16:07:00,473 INFO L175 Difference]: Start difference. First operand has 267 places, 428 transitions, 5383 flow. Second operand 12 states and 225 transitions. [2024-06-20 16:07:00,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 473 transitions, 6927 flow [2024-06-20 16:07:01,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 473 transitions, 6857 flow, removed 29 selfloop flow, removed 3 redundant places. [2024-06-20 16:07:01,866 INFO L231 Difference]: Finished difference. Result has 276 places, 431 transitions, 5809 flow [2024-06-20 16:07:01,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5313, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=428, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5809, PETRI_PLACES=276, PETRI_TRANSITIONS=431} [2024-06-20 16:07:01,866 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 232 predicate places. [2024-06-20 16:07:01,867 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 431 transitions, 5809 flow [2024-06-20 16:07:01,867 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) [2024-06-20 16:07:01,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:07:01,867 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:07:01,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-20 16:07:01,867 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)] === [2024-06-20 16:07:01,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:07:01,867 INFO L85 PathProgramCache]: Analyzing trace with hash 1866500443, now seen corresponding path program 11 times [2024-06-20 16:07:01,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:07:01,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630637984] [2024-06-20 16:07:01,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:07:01,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:07:01,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:07:02,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:07:02,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:07:02,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630637984] [2024-06-20 16:07:02,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630637984] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:07:02,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:07:02,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:07:02,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67174263] [2024-06-20 16:07:02,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:07:02,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:07:02,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:07:02,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:07:02,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:07:02,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-20 16:07:02,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 431 transitions, 5809 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) [2024-06-20 16:07:02,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:07:02,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-20 16:07:02,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:07:04,466 INFO L124 PetriNetUnfolderBase]: 3713/5545 cut-off events. [2024-06-20 16:07:04,466 INFO L125 PetriNetUnfolderBase]: For 1022744/1022758 co-relation queries the response was YES. [2024-06-20 16:07:04,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65842 conditions, 5545 events. 3713/5545 cut-off events. For 1022744/1022758 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 28849 event pairs, 688 based on Foata normal form. 11/5553 useless extension candidates. Maximal degree in co-relation 65721. Up to 4101 conditions per place. [2024-06-20 16:07:04,542 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 195 selfloop transitions, 292 changer transitions 0/491 dead transitions. [2024-06-20 16:07:04,543 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 491 transitions, 8081 flow [2024-06-20 16:07:04,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-20 16:07:04,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-20 16:07:04,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 253 transitions. [2024-06-20 16:07:04,544 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4525939177101968 [2024-06-20 16:07:04,544 INFO L175 Difference]: Start difference. First operand has 276 places, 431 transitions, 5809 flow. Second operand 13 states and 253 transitions. [2024-06-20 16:07:04,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 491 transitions, 8081 flow [2024-06-20 16:07:06,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 491 transitions, 7660 flow, removed 94 selfloop flow, removed 9 redundant places. [2024-06-20 16:07:06,087 INFO L231 Difference]: Finished difference. Result has 281 places, 441 transitions, 6634 flow [2024-06-20 16:07:06,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5388, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=431, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=286, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6634, PETRI_PLACES=281, PETRI_TRANSITIONS=441} [2024-06-20 16:07:06,088 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 237 predicate places. [2024-06-20 16:07:06,088 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 441 transitions, 6634 flow [2024-06-20 16:07:06,088 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) [2024-06-20 16:07:06,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:07:06,088 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:07:06,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-20 16:07:06,089 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)] === [2024-06-20 16:07:06,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:07:06,089 INFO L85 PathProgramCache]: Analyzing trace with hash 1877551912, now seen corresponding path program 6 times [2024-06-20 16:07:06,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:07:06,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048933708] [2024-06-20 16:07:06,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:07:06,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:07:06,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:07:07,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:07:07,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:07:07,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048933708] [2024-06-20 16:07:07,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048933708] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:07:07,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:07:07,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:07:07,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499599666] [2024-06-20 16:07:07,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:07:07,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:07:07,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:07:07,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:07:07,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:07:07,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-20 16:07:07,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 441 transitions, 6634 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) [2024-06-20 16:07:07,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:07:07,272 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-20 16:07:07,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:07:08,564 INFO L124 PetriNetUnfolderBase]: 3751/5605 cut-off events. [2024-06-20 16:07:08,564 INFO L125 PetriNetUnfolderBase]: For 1068280/1068294 co-relation queries the response was YES. [2024-06-20 16:07:08,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68841 conditions, 5605 events. 3751/5605 cut-off events. For 1068280/1068294 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 29224 event pairs, 638 based on Foata normal form. 11/5613 useless extension candidates. Maximal degree in co-relation 68718. Up to 4583 conditions per place. [2024-06-20 16:07:08,643 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 310 selfloop transitions, 171 changer transitions 0/485 dead transitions. [2024-06-20 16:07:08,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 485 transitions, 8710 flow [2024-06-20 16:07:08,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:07:08,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:07:08,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 195 transitions. [2024-06-20 16:07:08,644 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45348837209302323 [2024-06-20 16:07:08,644 INFO L175 Difference]: Start difference. First operand has 281 places, 441 transitions, 6634 flow. Second operand 10 states and 195 transitions. [2024-06-20 16:07:08,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 485 transitions, 8710 flow [2024-06-20 16:07:10,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 485 transitions, 8135 flow, removed 147 selfloop flow, removed 10 redundant places. [2024-06-20 16:07:10,327 INFO L231 Difference]: Finished difference. Result has 281 places, 447 transitions, 6823 flow [2024-06-20 16:07:10,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6071, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6823, PETRI_PLACES=281, PETRI_TRANSITIONS=447} [2024-06-20 16:07:10,327 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 237 predicate places. [2024-06-20 16:07:10,327 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 447 transitions, 6823 flow [2024-06-20 16:07:10,327 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) [2024-06-20 16:07:10,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:07:10,328 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:07:10,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-20 16:07:10,328 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)] === [2024-06-20 16:07:10,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:07:10,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1866510022, now seen corresponding path program 7 times [2024-06-20 16:07:10,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:07:10,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042994946] [2024-06-20 16:07:10,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:07:10,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:07:10,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:07:11,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:07:11,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:07:11,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042994946] [2024-06-20 16:07:11,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042994946] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:07:11,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:07:11,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:07:11,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377822219] [2024-06-20 16:07:11,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:07:11,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:07:11,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:07:11,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:07:11,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:07:11,608 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-20 16:07:11,609 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 447 transitions, 6823 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) [2024-06-20 16:07:11,609 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:07:11,609 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-20 16:07:11,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:07:12,957 INFO L124 PetriNetUnfolderBase]: 3776/5639 cut-off events. [2024-06-20 16:07:12,957 INFO L125 PetriNetUnfolderBase]: For 1081650/1081664 co-relation queries the response was YES. [2024-06-20 16:07:13,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69318 conditions, 5639 events. 3776/5639 cut-off events. For 1081650/1081664 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 29434 event pairs, 702 based on Foata normal form. 11/5647 useless extension candidates. Maximal degree in co-relation 69194. Up to 4929 conditions per place. [2024-06-20 16:07:13,034 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 335 selfloop transitions, 150 changer transitions 0/489 dead transitions. [2024-06-20 16:07:13,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 489 transitions, 8413 flow [2024-06-20 16:07:13,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:07:13,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:07:13,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 211 transitions. [2024-06-20 16:07:13,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44608879492600423 [2024-06-20 16:07:13,035 INFO L175 Difference]: Start difference. First operand has 281 places, 447 transitions, 6823 flow. Second operand 11 states and 211 transitions. [2024-06-20 16:07:13,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 489 transitions, 8413 flow [2024-06-20 16:07:14,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 489 transitions, 7974 flow, removed 128 selfloop flow, removed 6 redundant places. [2024-06-20 16:07:14,682 INFO L231 Difference]: Finished difference. Result has 286 places, 450 transitions, 6903 flow [2024-06-20 16:07:14,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6416, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6903, PETRI_PLACES=286, PETRI_TRANSITIONS=450} [2024-06-20 16:07:14,682 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 242 predicate places. [2024-06-20 16:07:14,683 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 450 transitions, 6903 flow [2024-06-20 16:07:14,683 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) [2024-06-20 16:07:14,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:07:14,683 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:07:14,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-20 16:07:14,683 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)] === [2024-06-20 16:07:14,683 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:07:14,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1304372925, now seen corresponding path program 12 times [2024-06-20 16:07:14,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:07:14,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559194536] [2024-06-20 16:07:14,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:07:14,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:07:14,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:07:15,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:07:15,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:07:15,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559194536] [2024-06-20 16:07:15,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559194536] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:07:15,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:07:15,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:07:15,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291168450] [2024-06-20 16:07:15,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:07:15,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:07:15,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:07:15,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:07:15,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:07:15,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-20 16:07:15,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 450 transitions, 6903 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) [2024-06-20 16:07:15,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:07:15,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-20 16:07:15,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:07:17,200 INFO L124 PetriNetUnfolderBase]: 3794/5676 cut-off events. [2024-06-20 16:07:17,201 INFO L125 PetriNetUnfolderBase]: For 1085834/1085848 co-relation queries the response was YES. [2024-06-20 16:07:17,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69937 conditions, 5676 events. 3794/5676 cut-off events. For 1085834/1085848 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 29757 event pairs, 683 based on Foata normal form. 8/5681 useless extension candidates. Maximal degree in co-relation 69811. Up to 4982 conditions per place. [2024-06-20 16:07:17,276 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 397 selfloop transitions, 110 changer transitions 0/511 dead transitions. [2024-06-20 16:07:17,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 511 transitions, 8964 flow [2024-06-20 16:07:17,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:07:17,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:07:17,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 195 transitions. [2024-06-20 16:07:17,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45348837209302323 [2024-06-20 16:07:17,278 INFO L175 Difference]: Start difference. First operand has 286 places, 450 transitions, 6903 flow. Second operand 10 states and 195 transitions. [2024-06-20 16:07:17,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 511 transitions, 8964 flow [2024-06-20 16:07:19,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 511 transitions, 8509 flow, removed 80 selfloop flow, removed 9 redundant places. [2024-06-20 16:07:19,072 INFO L231 Difference]: Finished difference. Result has 290 places, 472 transitions, 7227 flow [2024-06-20 16:07:19,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6448, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7227, PETRI_PLACES=290, PETRI_TRANSITIONS=472} [2024-06-20 16:07:19,073 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 246 predicate places. [2024-06-20 16:07:19,073 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 472 transitions, 7227 flow [2024-06-20 16:07:19,073 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) [2024-06-20 16:07:19,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:07:19,073 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:07:19,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-20 16:07:19,074 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)] === [2024-06-20 16:07:19,074 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:07:19,074 INFO L85 PathProgramCache]: Analyzing trace with hash 1304380644, now seen corresponding path program 8 times [2024-06-20 16:07:19,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:07:19,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043817788] [2024-06-20 16:07:19,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:07:19,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:07:19,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:07:20,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:07:20,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:07:20,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043817788] [2024-06-20 16:07:20,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043817788] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:07:20,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:07:20,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:07:20,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555115039] [2024-06-20 16:07:20,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:07:20,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:07:20,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:07:20,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:07:20,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:07:20,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-20 16:07:20,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 472 transitions, 7227 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) [2024-06-20 16:07:20,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:07:20,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-20 16:07:20,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:07:21,551 INFO L124 PetriNetUnfolderBase]: 3822/5709 cut-off events. [2024-06-20 16:07:21,551 INFO L125 PetriNetUnfolderBase]: For 1126173/1126187 co-relation queries the response was YES. [2024-06-20 16:07:21,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70797 conditions, 5709 events. 3822/5709 cut-off events. For 1126173/1126187 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 29821 event pairs, 701 based on Foata normal form. 11/5717 useless extension candidates. Maximal degree in co-relation 70667. Up to 5256 conditions per place. [2024-06-20 16:07:21,619 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 421 selfloop transitions, 85 changer transitions 0/510 dead transitions. [2024-06-20 16:07:21,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 510 transitions, 8995 flow [2024-06-20 16:07:21,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:07:21,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:07:21,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 191 transitions. [2024-06-20 16:07:21,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4441860465116279 [2024-06-20 16:07:21,621 INFO L175 Difference]: Start difference. First operand has 290 places, 472 transitions, 7227 flow. Second operand 10 states and 191 transitions. [2024-06-20 16:07:21,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 510 transitions, 8995 flow [2024-06-20 16:07:23,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 510 transitions, 8663 flow, removed 125 selfloop flow, removed 4 redundant places. [2024-06-20 16:07:23,050 INFO L231 Difference]: Finished difference. Result has 296 places, 475 transitions, 7257 flow [2024-06-20 16:07:23,051 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6895, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=472, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7257, PETRI_PLACES=296, PETRI_TRANSITIONS=475} [2024-06-20 16:07:23,051 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 252 predicate places. [2024-06-20 16:07:23,051 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 475 transitions, 7257 flow [2024-06-20 16:07:23,051 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) [2024-06-20 16:07:23,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:07:23,051 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:07:23,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-20 16:07:23,052 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)] === [2024-06-20 16:07:23,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:07:23,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1297223085, now seen corresponding path program 13 times [2024-06-20 16:07:23,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:07:23,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284321187] [2024-06-20 16:07:23,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:07:23,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:07:23,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:07:24,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:07:24,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:07:24,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284321187] [2024-06-20 16:07:24,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284321187] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:07:24,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:07:24,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:07:24,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449182566] [2024-06-20 16:07:24,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:07:24,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:07:24,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:07:24,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:07:24,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:07:24,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-20 16:07:24,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 475 transitions, 7257 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) [2024-06-20 16:07:24,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:07:24,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-20 16:07:24,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:07:25,698 INFO L124 PetriNetUnfolderBase]: 3840/5746 cut-off events. [2024-06-20 16:07:25,698 INFO L125 PetriNetUnfolderBase]: For 1136104/1136118 co-relation queries the response was YES. [2024-06-20 16:07:25,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71300 conditions, 5746 events. 3840/5746 cut-off events. For 1136104/1136118 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 30211 event pairs, 692 based on Foata normal form. 8/5751 useless extension candidates. Maximal degree in co-relation 71168. Up to 5052 conditions per place. [2024-06-20 16:07:25,771 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 407 selfloop transitions, 109 changer transitions 0/520 dead transitions. [2024-06-20 16:07:25,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 520 transitions, 9291 flow [2024-06-20 16:07:25,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:07:25,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:07:25,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 195 transitions. [2024-06-20 16:07:25,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45348837209302323 [2024-06-20 16:07:25,773 INFO L175 Difference]: Start difference. First operand has 296 places, 475 transitions, 7257 flow. Second operand 10 states and 195 transitions. [2024-06-20 16:07:25,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 520 transitions, 9291 flow [2024-06-20 16:07:27,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 520 transitions, 8959 flow, removed 83 selfloop flow, removed 8 redundant places. [2024-06-20 16:07:27,820 INFO L231 Difference]: Finished difference. Result has 298 places, 480 transitions, 7391 flow [2024-06-20 16:07:27,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6925, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=475, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7391, PETRI_PLACES=298, PETRI_TRANSITIONS=480} [2024-06-20 16:07:27,820 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 254 predicate places. [2024-06-20 16:07:27,820 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 480 transitions, 7391 flow [2024-06-20 16:07:27,821 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) [2024-06-20 16:07:27,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:07:27,821 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:07:27,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-20 16:07:27,821 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)] === [2024-06-20 16:07:27,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:07:27,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1304380365, now seen corresponding path program 14 times [2024-06-20 16:07:27,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:07:27,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433872606] [2024-06-20 16:07:27,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:07:27,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:07:27,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:07:28,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:07:28,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:07:28,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433872606] [2024-06-20 16:07:28,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433872606] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:07:28,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:07:28,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:07:28,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796035383] [2024-06-20 16:07:28,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:07:28,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:07:28,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:07:28,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:07:28,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:07:28,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-20 16:07:28,920 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 480 transitions, 7391 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) [2024-06-20 16:07:28,920 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:07:28,920 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-20 16:07:28,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:07:30,299 INFO L124 PetriNetUnfolderBase]: 3858/5772 cut-off events. [2024-06-20 16:07:30,299 INFO L125 PetriNetUnfolderBase]: For 1158735/1158749 co-relation queries the response was YES. [2024-06-20 16:07:30,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71862 conditions, 5772 events. 3858/5772 cut-off events. For 1158735/1158749 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 30314 event pairs, 692 based on Foata normal form. 8/5777 useless extension candidates. Maximal degree in co-relation 71729. Up to 5052 conditions per place. [2024-06-20 16:07:30,381 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 401 selfloop transitions, 118 changer transitions 0/523 dead transitions. [2024-06-20 16:07:30,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 523 transitions, 9272 flow [2024-06-20 16:07:30,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:07:30,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:07:30,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 197 transitions. [2024-06-20 16:07:30,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45813953488372094 [2024-06-20 16:07:30,383 INFO L175 Difference]: Start difference. First operand has 298 places, 480 transitions, 7391 flow. Second operand 10 states and 197 transitions. [2024-06-20 16:07:30,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 523 transitions, 9272 flow [2024-06-20 16:07:32,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 523 transitions, 8874 flow, removed 103 selfloop flow, removed 6 redundant places. [2024-06-20 16:07:32,270 INFO L231 Difference]: Finished difference. Result has 302 places, 484 transitions, 7480 flow [2024-06-20 16:07:32,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6993, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7480, PETRI_PLACES=302, PETRI_TRANSITIONS=484} [2024-06-20 16:07:32,271 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 258 predicate places. [2024-06-20 16:07:32,271 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 484 transitions, 7480 flow [2024-06-20 16:07:32,271 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) [2024-06-20 16:07:32,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:07:32,272 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:07:32,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-20 16:07:32,272 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)] === [2024-06-20 16:07:32,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:07:32,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1304649414, now seen corresponding path program 9 times [2024-06-20 16:07:32,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:07:32,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16274872] [2024-06-20 16:07:32,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:07:32,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:07:32,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:07:33,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:07:33,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:07:33,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16274872] [2024-06-20 16:07:33,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16274872] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:07:33,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:07:33,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:07:33,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168788309] [2024-06-20 16:07:33,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:07:33,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:07:33,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:07:33,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:07:33,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:07:33,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-20 16:07:33,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 484 transitions, 7480 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) [2024-06-20 16:07:33,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:07:33,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-20 16:07:33,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:07:34,789 INFO L124 PetriNetUnfolderBase]: 3886/5807 cut-off events. [2024-06-20 16:07:34,789 INFO L125 PetriNetUnfolderBase]: For 1201440/1201454 co-relation queries the response was YES. [2024-06-20 16:07:34,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72566 conditions, 5807 events. 3886/5807 cut-off events. For 1201440/1201454 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 30479 event pairs, 698 based on Foata normal form. 11/5815 useless extension candidates. Maximal degree in co-relation 72432. Up to 5211 conditions per place. [2024-06-20 16:07:34,870 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 417 selfloop transitions, 104 changer transitions 0/525 dead transitions. [2024-06-20 16:07:34,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 525 transitions, 9630 flow [2024-06-20 16:07:34,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:07:34,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:07:34,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 195 transitions. [2024-06-20 16:07:34,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45348837209302323 [2024-06-20 16:07:34,872 INFO L175 Difference]: Start difference. First operand has 302 places, 484 transitions, 7480 flow. Second operand 10 states and 195 transitions. [2024-06-20 16:07:34,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 525 transitions, 9630 flow [2024-06-20 16:07:36,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 525 transitions, 9185 flow, removed 107 selfloop flow, removed 8 redundant places. [2024-06-20 16:07:36,840 INFO L231 Difference]: Finished difference. Result has 304 places, 487 transitions, 7435 flow [2024-06-20 16:07:36,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7035, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=484, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=383, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7435, PETRI_PLACES=304, PETRI_TRANSITIONS=487} [2024-06-20 16:07:36,841 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 260 predicate places. [2024-06-20 16:07:36,841 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 487 transitions, 7435 flow [2024-06-20 16:07:36,841 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) [2024-06-20 16:07:36,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:07:36,841 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:07:36,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-20 16:07:36,842 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)] === [2024-06-20 16:07:36,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:07:36,842 INFO L85 PathProgramCache]: Analyzing trace with hash 1304639835, now seen corresponding path program 15 times [2024-06-20 16:07:36,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:07:36,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858900836] [2024-06-20 16:07:36,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:07:36,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:07:36,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:07:37,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:07:37,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:07:37,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858900836] [2024-06-20 16:07:37,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858900836] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:07:37,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:07:37,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:07:37,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112176456] [2024-06-20 16:07:37,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:07:37,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:07:37,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:07:37,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:07:37,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:07:37,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-20 16:07:37,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 487 transitions, 7435 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) [2024-06-20 16:07:37,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:07:37,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-20 16:07:37,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:07:39,320 INFO L124 PetriNetUnfolderBase]: 3904/5842 cut-off events. [2024-06-20 16:07:39,321 INFO L125 PetriNetUnfolderBase]: For 1213859/1213873 co-relation queries the response was YES. [2024-06-20 16:07:39,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72941 conditions, 5842 events. 3904/5842 cut-off events. For 1213859/1213873 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 30800 event pairs, 691 based on Foata normal form. 8/5847 useless extension candidates. Maximal degree in co-relation 72806. Up to 5033 conditions per place. [2024-06-20 16:07:39,401 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 392 selfloop transitions, 139 changer transitions 0/535 dead transitions. [2024-06-20 16:07:39,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 535 transitions, 9905 flow [2024-06-20 16:07:39,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:07:39,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:07:39,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 199 transitions. [2024-06-20 16:07:39,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4627906976744186 [2024-06-20 16:07:39,402 INFO L175 Difference]: Start difference. First operand has 304 places, 487 transitions, 7435 flow. Second operand 10 states and 199 transitions. [2024-06-20 16:07:39,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 535 transitions, 9905 flow [2024-06-20 16:07:41,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 535 transitions, 9485 flow, removed 89 selfloop flow, removed 8 redundant places. [2024-06-20 16:07:41,475 INFO L231 Difference]: Finished difference. Result has 306 places, 494 transitions, 7765 flow [2024-06-20 16:07:41,475 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7015, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=487, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=352, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7765, PETRI_PLACES=306, PETRI_TRANSITIONS=494} [2024-06-20 16:07:41,476 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 262 predicate places. [2024-06-20 16:07:41,476 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 494 transitions, 7765 flow [2024-06-20 16:07:41,476 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) [2024-06-20 16:07:41,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:07:41,476 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:07:41,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-20 16:07:41,477 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)] === [2024-06-20 16:07:41,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:07:41,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1297021275, now seen corresponding path program 16 times [2024-06-20 16:07:41,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:07:41,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171533925] [2024-06-20 16:07:41,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:07:41,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:07:41,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:07:42,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:07:42,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:07:42,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171533925] [2024-06-20 16:07:42,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171533925] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:07:42,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:07:42,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:07:42,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722325389] [2024-06-20 16:07:42,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:07:42,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:07:42,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:07:42,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:07:42,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:07:42,682 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-20 16:07:42,682 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 494 transitions, 7765 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) [2024-06-20 16:07:42,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:07:42,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-20 16:07:42,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:07:44,053 INFO L124 PetriNetUnfolderBase]: 3922/5878 cut-off events. [2024-06-20 16:07:44,054 INFO L125 PetriNetUnfolderBase]: For 1237374/1237388 co-relation queries the response was YES. [2024-06-20 16:07:44,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73417 conditions, 5878 events. 3922/5878 cut-off events. For 1237374/1237388 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 31105 event pairs, 691 based on Foata normal form. 8/5883 useless extension candidates. Maximal degree in co-relation 73281. Up to 5174 conditions per place. [2024-06-20 16:07:44,139 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 426 selfloop transitions, 109 changer transitions 0/539 dead transitions. [2024-06-20 16:07:44,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 539 transitions, 10064 flow [2024-06-20 16:07:44,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:07:44,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:07:44,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 195 transitions. [2024-06-20 16:07:44,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45348837209302323 [2024-06-20 16:07:44,141 INFO L175 Difference]: Start difference. First operand has 306 places, 494 transitions, 7765 flow. Second operand 10 states and 195 transitions. [2024-06-20 16:07:44,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 539 transitions, 10064 flow [2024-06-20 16:07:46,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 539 transitions, 9680 flow, removed 135 selfloop flow, removed 5 redundant places. [2024-06-20 16:07:46,460 INFO L231 Difference]: Finished difference. Result has 311 places, 498 transitions, 7866 flow [2024-06-20 16:07:46,461 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7401, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=385, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7866, PETRI_PLACES=311, PETRI_TRANSITIONS=498} [2024-06-20 16:07:46,461 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 267 predicate places. [2024-06-20 16:07:46,461 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 498 transitions, 7866 flow [2024-06-20 16:07:46,461 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) [2024-06-20 16:07:46,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:07:46,461 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:07:46,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-20 16:07:46,462 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:07:46,462 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:07:46,462 INFO L85 PathProgramCache]: Analyzing trace with hash 1297230525, now seen corresponding path program 17 times [2024-06-20 16:07:46,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:07:46,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427585731] [2024-06-20 16:07:46,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:07:46,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:07:46,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:07:47,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:07:47,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:07:47,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427585731] [2024-06-20 16:07:47,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427585731] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:07:47,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:07:47,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:07:47,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873202713] [2024-06-20 16:07:47,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:07:47,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:07:47,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:07:47,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:07:47,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:07:47,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-20 16:07:47,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 498 transitions, 7866 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) [2024-06-20 16:07:47,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:07:47,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-20 16:07:47,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:07:49,098 INFO L124 PetriNetUnfolderBase]: 3916/5865 cut-off events. [2024-06-20 16:07:49,099 INFO L125 PetriNetUnfolderBase]: For 1245637/1245651 co-relation queries the response was YES. [2024-06-20 16:07:49,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73346 conditions, 5865 events. 3916/5865 cut-off events. For 1245637/1245651 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 30997 event pairs, 691 based on Foata normal form. 8/5870 useless extension candidates. Maximal degree in co-relation 73208. Up to 5127 conditions per place. [2024-06-20 16:07:49,177 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 414 selfloop transitions, 120 changer transitions 0/538 dead transitions. [2024-06-20 16:07:49,177 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 538 transitions, 9745 flow [2024-06-20 16:07:49,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:07:49,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:07:49,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-20 16:07:49,178 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4558139534883721 [2024-06-20 16:07:49,178 INFO L175 Difference]: Start difference. First operand has 311 places, 498 transitions, 7866 flow. Second operand 10 states and 196 transitions. [2024-06-20 16:07:49,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 538 transitions, 9745 flow [2024-06-20 16:07:50,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 538 transitions, 9183 flow, removed 181 selfloop flow, removed 7 redundant places. [2024-06-20 16:07:50,740 INFO L231 Difference]: Finished difference. Result has 314 places, 498 transitions, 7553 flow [2024-06-20 16:07:50,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7304, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7553, PETRI_PLACES=314, PETRI_TRANSITIONS=498} [2024-06-20 16:07:50,741 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 270 predicate places. [2024-06-20 16:07:50,741 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 498 transitions, 7553 flow [2024-06-20 16:07:50,741 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) [2024-06-20 16:07:50,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:07:50,741 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:07:50,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-20 16:07:50,741 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:07:50,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:07:50,742 INFO L85 PathProgramCache]: Analyzing trace with hash 1297230804, now seen corresponding path program 10 times [2024-06-20 16:07:50,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:07:50,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708065474] [2024-06-20 16:07:50,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:07:50,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:07:50,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:07:51,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:07:51,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:07:51,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708065474] [2024-06-20 16:07:51,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708065474] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:07:51,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:07:51,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:07:51,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139479585] [2024-06-20 16:07:51,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:07:51,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:07:51,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:07:51,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:07:51,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:07:51,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-20 16:07:51,892 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 498 transitions, 7553 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) [2024-06-20 16:07:51,892 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:07:51,892 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-20 16:07:51,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:07:53,444 INFO L124 PetriNetUnfolderBase]: 3944/5895 cut-off events. [2024-06-20 16:07:53,444 INFO L125 PetriNetUnfolderBase]: For 1282549/1282563 co-relation queries the response was YES. [2024-06-20 16:07:53,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73711 conditions, 5895 events. 3944/5895 cut-off events. For 1282549/1282563 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 31019 event pairs, 706 based on Foata normal form. 11/5903 useless extension candidates. Maximal degree in co-relation 73572. Up to 5440 conditions per place. [2024-06-20 16:07:53,540 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 449 selfloop transitions, 84 changer transitions 0/537 dead transitions. [2024-06-20 16:07:53,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 537 transitions, 9597 flow [2024-06-20 16:07:53,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:07:53,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:07:53,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 191 transitions. [2024-06-20 16:07:53,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4441860465116279 [2024-06-20 16:07:53,542 INFO L175 Difference]: Start difference. First operand has 314 places, 498 transitions, 7553 flow. Second operand 10 states and 191 transitions. [2024-06-20 16:07:53,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 537 transitions, 9597 flow [2024-06-20 16:07:55,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 537 transitions, 9301 flow, removed 25 selfloop flow, removed 8 redundant places. [2024-06-20 16:07:55,730 INFO L231 Difference]: Finished difference. Result has 316 places, 501 transitions, 7617 flow [2024-06-20 16:07:55,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7257, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7617, PETRI_PLACES=316, PETRI_TRANSITIONS=501} [2024-06-20 16:07:55,731 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 272 predicate places. [2024-06-20 16:07:55,731 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 501 transitions, 7617 flow [2024-06-20 16:07:55,731 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) [2024-06-20 16:07:55,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:07:55,731 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:07:55,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-20 16:07:55,731 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:07:55,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:07:55,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1304640114, now seen corresponding path program 11 times [2024-06-20 16:07:55,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:07:55,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211098977] [2024-06-20 16:07:55,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:07:55,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:07:55,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:07:56,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:07:56,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:07:56,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211098977] [2024-06-20 16:07:56,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211098977] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:07:56,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:07:56,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:07:56,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424244020] [2024-06-20 16:07:56,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:07:56,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:07:56,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:07:56,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:07:56,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:07:56,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-20 16:07:56,869 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 501 transitions, 7617 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) [2024-06-20 16:07:56,869 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:07:56,869 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-20 16:07:56,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:07:58,254 INFO L124 PetriNetUnfolderBase]: 3934/5881 cut-off events. [2024-06-20 16:07:58,255 INFO L125 PetriNetUnfolderBase]: For 1286397/1286411 co-relation queries the response was YES. [2024-06-20 16:07:58,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72996 conditions, 5881 events. 3934/5881 cut-off events. For 1286397/1286411 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 30934 event pairs, 703 based on Foata normal form. 11/5889 useless extension candidates. Maximal degree in co-relation 72856. Up to 5387 conditions per place. [2024-06-20 16:07:58,334 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 436 selfloop transitions, 96 changer transitions 0/536 dead transitions. [2024-06-20 16:07:58,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 536 transitions, 9307 flow [2024-06-20 16:07:58,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:07:58,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:07:58,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 192 transitions. [2024-06-20 16:07:58,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44651162790697674 [2024-06-20 16:07:58,336 INFO L175 Difference]: Start difference. First operand has 316 places, 501 transitions, 7617 flow. Second operand 10 states and 192 transitions. [2024-06-20 16:07:58,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 536 transitions, 9307 flow [2024-06-20 16:08:00,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 536 transitions, 8821 flow, removed 161 selfloop flow, removed 8 redundant places. [2024-06-20 16:08:00,968 INFO L231 Difference]: Finished difference. Result has 318 places, 501 transitions, 7331 flow [2024-06-20 16:08:00,968 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7131, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=501, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7331, PETRI_PLACES=318, PETRI_TRANSITIONS=501} [2024-06-20 16:08:00,968 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 274 predicate places. [2024-06-20 16:08:00,969 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 501 transitions, 7331 flow [2024-06-20 16:08:00,969 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) [2024-06-20 16:08:00,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:08:00,969 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:08:00,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-20 16:08:00,969 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:08:00,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:08:00,970 INFO L85 PathProgramCache]: Analyzing trace with hash 1251914436, now seen corresponding path program 3 times [2024-06-20 16:08:00,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:08:00,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301456761] [2024-06-20 16:08:00,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:08:00,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:08:00,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:08:01,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:08:01,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:08:01,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301456761] [2024-06-20 16:08:01,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301456761] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:08:01,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:08:01,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:08:01,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675809557] [2024-06-20 16:08:01,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:08:01,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:08:01,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:08:01,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:08:01,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:08:01,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-20 16:08:01,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 501 transitions, 7331 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) [2024-06-20 16:08:01,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:08:01,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-20 16:08:01,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:08:03,205 INFO L124 PetriNetUnfolderBase]: 3931/5875 cut-off events. [2024-06-20 16:08:03,205 INFO L125 PetriNetUnfolderBase]: For 1274705/1274719 co-relation queries the response was YES. [2024-06-20 16:08:03,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72246 conditions, 5875 events. 3931/5875 cut-off events. For 1274705/1274719 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 30829 event pairs, 703 based on Foata normal form. 6/5878 useless extension candidates. Maximal degree in co-relation 72105. Up to 5731 conditions per place. [2024-06-20 16:08:03,284 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 481 selfloop transitions, 26 changer transitions 0/511 dead transitions. [2024-06-20 16:08:03,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 511 transitions, 8369 flow [2024-06-20 16:08:03,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:08:03,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:08:03,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-20 16:08:03,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-20 16:08:03,286 INFO L175 Difference]: Start difference. First operand has 318 places, 501 transitions, 7331 flow. Second operand 7 states and 119 transitions. [2024-06-20 16:08:03,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 511 transitions, 8369 flow [2024-06-20 16:08:06,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 511 transitions, 8131 flow, removed 17 selfloop flow, removed 9 redundant places. [2024-06-20 16:08:06,075 INFO L231 Difference]: Finished difference. Result has 316 places, 501 transitions, 7151 flow [2024-06-20 16:08:06,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7093, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=501, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=475, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7151, PETRI_PLACES=316, PETRI_TRANSITIONS=501} [2024-06-20 16:08:06,075 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 272 predicate places. [2024-06-20 16:08:06,075 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 501 transitions, 7151 flow [2024-06-20 16:08:06,076 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) [2024-06-20 16:08:06,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:08:06,076 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:08:06,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-20 16:08:06,076 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:08:06,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:08:06,076 INFO L85 PathProgramCache]: Analyzing trace with hash 226806560, now seen corresponding path program 2 times [2024-06-20 16:08:06,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:08:06,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102039949] [2024-06-20 16:08:06,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:08:06,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:08:06,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:08:06,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:08:06,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:08:06,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102039949] [2024-06-20 16:08:06,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102039949] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:08:06,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:08:06,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:08:06,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967681687] [2024-06-20 16:08:06,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:08:06,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:08:06,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:08:06,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:08:06,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:08:06,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 16:08:06,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 501 transitions, 7151 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) [2024-06-20 16:08:06,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:08:06,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 16:08:06,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:08:08,408 INFO L124 PetriNetUnfolderBase]: 3733/5680 cut-off events. [2024-06-20 16:08:08,408 INFO L125 PetriNetUnfolderBase]: For 1281978/1281989 co-relation queries the response was YES. [2024-06-20 16:08:08,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70397 conditions, 5680 events. 3733/5680 cut-off events. For 1281978/1281989 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 30728 event pairs, 694 based on Foata normal form. 9/5686 useless extension candidates. Maximal degree in co-relation 70255. Up to 5239 conditions per place. [2024-06-20 16:08:08,484 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 449 selfloop transitions, 26 changer transitions 0/515 dead transitions. [2024-06-20 16:08:08,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 515 transitions, 8361 flow [2024-06-20 16:08:08,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:08:08,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:08:08,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-20 16:08:08,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-20 16:08:08,485 INFO L175 Difference]: Start difference. First operand has 316 places, 501 transitions, 7151 flow. Second operand 7 states and 126 transitions. [2024-06-20 16:08:08,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 515 transitions, 8361 flow [2024-06-20 16:08:11,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 515 transitions, 8285 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-20 16:08:11,349 INFO L231 Difference]: Finished difference. Result has 316 places, 504 transitions, 7183 flow [2024-06-20 16:08:11,349 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7075, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=501, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=478, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7183, PETRI_PLACES=316, PETRI_TRANSITIONS=504} [2024-06-20 16:08:11,350 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 272 predicate places. [2024-06-20 16:08:11,350 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 504 transitions, 7183 flow [2024-06-20 16:08:11,350 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) [2024-06-20 16:08:11,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:08:11,351 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:08:11,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-20 16:08:11,351 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:08:11,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:08:11,351 INFO L85 PathProgramCache]: Analyzing trace with hash 227281790, now seen corresponding path program 3 times [2024-06-20 16:08:11,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:08:11,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311745223] [2024-06-20 16:08:11,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:08:11,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:08:11,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:08:12,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:08:12,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:08:12,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311745223] [2024-06-20 16:08:12,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311745223] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:08:12,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:08:12,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:08:12,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044135171] [2024-06-20 16:08:12,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:08:12,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:08:12,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:08:12,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:08:12,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:08:12,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 16:08:12,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 504 transitions, 7183 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) [2024-06-20 16:08:12,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:08:12,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 16:08:12,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:08:13,558 INFO L124 PetriNetUnfolderBase]: 3730/5676 cut-off events. [2024-06-20 16:08:13,558 INFO L125 PetriNetUnfolderBase]: For 1302237/1302245 co-relation queries the response was YES. [2024-06-20 16:08:13,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70535 conditions, 5676 events. 3730/5676 cut-off events. For 1302237/1302245 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 30691 event pairs, 694 based on Foata normal form. 7/5680 useless extension candidates. Maximal degree in co-relation 70392. Up to 5236 conditions per place. [2024-06-20 16:08:13,632 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 447 selfloop transitions, 27 changer transitions 0/514 dead transitions. [2024-06-20 16:08:13,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 514 transitions, 8155 flow [2024-06-20 16:08:13,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:08:13,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:08:13,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-20 16:08:13,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4119601328903654 [2024-06-20 16:08:13,633 INFO L175 Difference]: Start difference. First operand has 316 places, 504 transitions, 7183 flow. Second operand 7 states and 124 transitions. [2024-06-20 16:08:13,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 514 transitions, 8155 flow [2024-06-20 16:08:16,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 514 transitions, 8041 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-20 16:08:16,761 INFO L231 Difference]: Finished difference. Result has 319 places, 504 transitions, 7129 flow [2024-06-20 16:08:16,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7069, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=504, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=477, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7129, PETRI_PLACES=319, PETRI_TRANSITIONS=504} [2024-06-20 16:08:16,761 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 275 predicate places. [2024-06-20 16:08:16,761 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 504 transitions, 7129 flow [2024-06-20 16:08:16,761 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) [2024-06-20 16:08:16,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:08:16,762 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:08:16,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-20 16:08:16,762 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:08:16,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:08:16,762 INFO L85 PathProgramCache]: Analyzing trace with hash -1937871620, now seen corresponding path program 1 times [2024-06-20 16:08:16,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:08:16,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113321589] [2024-06-20 16:08:16,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:08:16,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:08:16,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:08:17,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:08:17,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:08:17,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113321589] [2024-06-20 16:08:17,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113321589] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:08:17,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:08:17,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:08:17,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235333220] [2024-06-20 16:08:17,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:08:17,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:08:17,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:08:17,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:08:17,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:08:17,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-20 16:08:17,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 504 transitions, 7129 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:08:17,679 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:08:17,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-20 16:08:17,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:08:18,964 INFO L124 PetriNetUnfolderBase]: 3575/5538 cut-off events. [2024-06-20 16:08:18,964 INFO L125 PetriNetUnfolderBase]: For 1176163/1176163 co-relation queries the response was YES. [2024-06-20 16:08:19,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66246 conditions, 5538 events. 3575/5538 cut-off events. For 1176163/1176163 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 30809 event pairs, 588 based on Foata normal form. 4/5530 useless extension candidates. Maximal degree in co-relation 66102. Up to 4931 conditions per place. [2024-06-20 16:08:19,035 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 458 selfloop transitions, 28 changer transitions 0/531 dead transitions. [2024-06-20 16:08:19,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 531 transitions, 8477 flow [2024-06-20 16:08:19,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:08:19,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:08:19,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 140 transitions. [2024-06-20 16:08:19,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-20 16:08:19,036 INFO L175 Difference]: Start difference. First operand has 319 places, 504 transitions, 7129 flow. Second operand 7 states and 140 transitions. [2024-06-20 16:08:19,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 531 transitions, 8477 flow [2024-06-20 16:08:22,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 531 transitions, 8417 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-20 16:08:22,686 INFO L231 Difference]: Finished difference. Result has 321 places, 514 transitions, 7270 flow [2024-06-20 16:08:22,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7069, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=504, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=479, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7270, PETRI_PLACES=321, PETRI_TRANSITIONS=514} [2024-06-20 16:08:22,687 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 277 predicate places. [2024-06-20 16:08:22,687 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 514 transitions, 7270 flow [2024-06-20 16:08:22,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:08:22,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:08:22,687 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:08:22,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-20 16:08:22,687 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:08:22,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:08:22,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1252398036, now seen corresponding path program 2 times [2024-06-20 16:08:22,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:08:22,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606513854] [2024-06-20 16:08:22,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:08:22,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:08:22,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:08:23,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:08:23,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:08:23,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606513854] [2024-06-20 16:08:23,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606513854] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:08:23,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:08:23,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:08:23,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48096444] [2024-06-20 16:08:23,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:08:23,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:08:23,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:08:23,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:08:23,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:08:23,583 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-20 16:08:23,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 514 transitions, 7270 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:08:23,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:08:23,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-20 16:08:23,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:08:25,023 INFO L124 PetriNetUnfolderBase]: 3568/5533 cut-off events. [2024-06-20 16:08:25,023 INFO L125 PetriNetUnfolderBase]: For 1192452/1192452 co-relation queries the response was YES. [2024-06-20 16:08:25,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66992 conditions, 5533 events. 3568/5533 cut-off events. For 1192452/1192452 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 30705 event pairs, 589 based on Foata normal form. 3/5525 useless extension candidates. Maximal degree in co-relation 66847. Up to 5002 conditions per place. [2024-06-20 16:08:25,097 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 467 selfloop transitions, 16 changer transitions 0/528 dead transitions. [2024-06-20 16:08:25,097 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 528 transitions, 8324 flow [2024-06-20 16:08:25,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:08:25,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:08:25,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-20 16:08:25,098 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42524916943521596 [2024-06-20 16:08:25,098 INFO L175 Difference]: Start difference. First operand has 321 places, 514 transitions, 7270 flow. Second operand 7 states and 128 transitions. [2024-06-20 16:08:25,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 528 transitions, 8324 flow [2024-06-20 16:08:28,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 528 transitions, 8248 flow, removed 34 selfloop flow, removed 2 redundant places. [2024-06-20 16:08:28,253 INFO L231 Difference]: Finished difference. Result has 326 places, 517 transitions, 7299 flow [2024-06-20 16:08:28,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7194, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=498, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7299, PETRI_PLACES=326, PETRI_TRANSITIONS=517} [2024-06-20 16:08:28,253 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 282 predicate places. [2024-06-20 16:08:28,254 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 517 transitions, 7299 flow [2024-06-20 16:08:28,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:08:28,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:08:28,254 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:08:28,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-20 16:08:28,254 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:08:28,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:08:28,254 INFO L85 PathProgramCache]: Analyzing trace with hash 227052576, now seen corresponding path program 3 times [2024-06-20 16:08:28,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:08:28,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894914200] [2024-06-20 16:08:28,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:08:28,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:08:28,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:08:28,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:08:28,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:08:28,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894914200] [2024-06-20 16:08:28,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894914200] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:08:28,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:08:28,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:08:28,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902556156] [2024-06-20 16:08:28,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:08:28,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:08:28,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:08:28,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:08:28,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:08:29,045 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-20 16:08:29,045 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 517 transitions, 7299 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:08:29,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:08:29,045 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-20 16:08:29,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:08:30,269 INFO L124 PetriNetUnfolderBase]: 3554/5514 cut-off events. [2024-06-20 16:08:30,269 INFO L125 PetriNetUnfolderBase]: For 1199111/1199111 co-relation queries the response was YES. [2024-06-20 16:08:30,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66845 conditions, 5514 events. 3554/5514 cut-off events. For 1199111/1199111 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 30693 event pairs, 587 based on Foata normal form. 2/5504 useless extension candidates. Maximal degree in co-relation 66697. Up to 4974 conditions per place. [2024-06-20 16:08:30,357 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 466 selfloop transitions, 21 changer transitions 0/532 dead transitions. [2024-06-20 16:08:30,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 532 transitions, 8371 flow [2024-06-20 16:08:30,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:08:30,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:08:30,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-20 16:08:30,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43521594684385384 [2024-06-20 16:08:30,359 INFO L175 Difference]: Start difference. First operand has 326 places, 517 transitions, 7299 flow. Second operand 7 states and 131 transitions. [2024-06-20 16:08:30,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 532 transitions, 8371 flow [2024-06-20 16:08:32,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 532 transitions, 8290 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-20 16:08:32,714 INFO L231 Difference]: Finished difference. Result has 328 places, 520 transitions, 7338 flow [2024-06-20 16:08:32,714 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7218, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=517, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=496, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7338, PETRI_PLACES=328, PETRI_TRANSITIONS=520} [2024-06-20 16:08:32,714 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 284 predicate places. [2024-06-20 16:08:32,714 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 520 transitions, 7338 flow [2024-06-20 16:08:32,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:08:32,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:08:32,715 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:08:32,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-20 16:08:32,715 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:08:32,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:08:32,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1429473369, now seen corresponding path program 1 times [2024-06-20 16:08:32,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:08:32,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589989763] [2024-06-20 16:08:32,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:08:32,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:08:32,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:08:33,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:08:33,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:08:33,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589989763] [2024-06-20 16:08:33,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589989763] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:08:33,600 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:08:33,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:08:33,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419814980] [2024-06-20 16:08:33,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:08:33,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:08:33,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:08:33,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:08:33,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:08:33,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 16:08:33,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 520 transitions, 7338 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:08:33,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:08:33,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 16:08:33,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:08:35,403 INFO L124 PetriNetUnfolderBase]: 3884/5859 cut-off events. [2024-06-20 16:08:35,404 INFO L125 PetriNetUnfolderBase]: For 1436064/1436064 co-relation queries the response was YES. [2024-06-20 16:08:35,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74024 conditions, 5859 events. 3884/5859 cut-off events. For 1436064/1436064 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 31370 event pairs, 487 based on Foata normal form. 4/5861 useless extension candidates. Maximal degree in co-relation 73876. Up to 5210 conditions per place. [2024-06-20 16:08:35,480 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 432 selfloop transitions, 21 changer transitions 0/567 dead transitions. [2024-06-20 16:08:35,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 567 transitions, 8510 flow [2024-06-20 16:08:35,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:08:35,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:08:35,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 194 transitions. [2024-06-20 16:08:35,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4511627906976744 [2024-06-20 16:08:35,482 INFO L175 Difference]: Start difference. First operand has 328 places, 520 transitions, 7338 flow. Second operand 10 states and 194 transitions. [2024-06-20 16:08:35,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 567 transitions, 8510 flow [2024-06-20 16:08:37,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 567 transitions, 8416 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-20 16:08:38,006 INFO L231 Difference]: Finished difference. Result has 333 places, 522 transitions, 7449 flow [2024-06-20 16:08:38,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7244, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=520, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=499, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7449, PETRI_PLACES=333, PETRI_TRANSITIONS=522} [2024-06-20 16:08:38,006 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 289 predicate places. [2024-06-20 16:08:38,006 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 522 transitions, 7449 flow [2024-06-20 16:08:38,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:08:38,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:08:38,007 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:08:38,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-20 16:08:38,007 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:08:38,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:08:38,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1748710161, now seen corresponding path program 2 times [2024-06-20 16:08:38,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:08:38,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604163694] [2024-06-20 16:08:38,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:08:38,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:08:38,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:08:39,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:08:39,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:08:39,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604163694] [2024-06-20 16:08:39,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604163694] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:08:39,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:08:39,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:08:39,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611537837] [2024-06-20 16:08:39,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:08:39,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:08:39,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:08:39,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:08:39,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:08:39,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 16:08:39,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 522 transitions, 7449 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:08:39,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:08:39,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 16:08:39,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:08:40,970 INFO L124 PetriNetUnfolderBase]: 3901/5886 cut-off events. [2024-06-20 16:08:40,970 INFO L125 PetriNetUnfolderBase]: For 1472565/1472565 co-relation queries the response was YES. [2024-06-20 16:08:41,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74864 conditions, 5886 events. 3901/5886 cut-off events. For 1472565/1472565 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 31534 event pairs, 612 based on Foata normal form. 4/5888 useless extension candidates. Maximal degree in co-relation 74715. Up to 5263 conditions per place. [2024-06-20 16:08:41,058 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 432 selfloop transitions, 22 changer transitions 0/568 dead transitions. [2024-06-20 16:08:41,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 568 transitions, 8625 flow [2024-06-20 16:08:41,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:08:41,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:08:41,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 194 transitions. [2024-06-20 16:08:41,060 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4511627906976744 [2024-06-20 16:08:41,060 INFO L175 Difference]: Start difference. First operand has 333 places, 522 transitions, 7449 flow. Second operand 10 states and 194 transitions. [2024-06-20 16:08:41,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 568 transitions, 8625 flow [2024-06-20 16:08:44,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 568 transitions, 8438 flow, removed 74 selfloop flow, removed 8 redundant places. [2024-06-20 16:08:44,968 INFO L231 Difference]: Finished difference. Result has 335 places, 524 transitions, 7473 flow [2024-06-20 16:08:44,968 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7262, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=500, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7473, PETRI_PLACES=335, PETRI_TRANSITIONS=524} [2024-06-20 16:08:44,968 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 291 predicate places. [2024-06-20 16:08:44,968 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 524 transitions, 7473 flow [2024-06-20 16:08:44,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:08:44,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:08:44,969 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:08:44,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-20 16:08:44,969 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:08:44,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:08:44,969 INFO L85 PathProgramCache]: Analyzing trace with hash 1432335289, now seen corresponding path program 1 times [2024-06-20 16:08:44,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:08:44,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960257781] [2024-06-20 16:08:44,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:08:44,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:08:44,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:08:46,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:08:46,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:08:46,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960257781] [2024-06-20 16:08:46,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960257781] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:08:46,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:08:46,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:08:46,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472167824] [2024-06-20 16:08:46,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:08:46,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:08:46,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:08:46,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:08:46,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:08:46,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-20 16:08:46,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 524 transitions, 7473 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:08:46,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:08:46,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-20 16:08:46,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:08:48,109 INFO L124 PetriNetUnfolderBase]: 4037/6035 cut-off events. [2024-06-20 16:08:48,109 INFO L125 PetriNetUnfolderBase]: For 1510174/1510174 co-relation queries the response was YES. [2024-06-20 16:08:48,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76322 conditions, 6035 events. 4037/6035 cut-off events. For 1510174/1510174 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 31901 event pairs, 618 based on Foata normal form. 3/6036 useless extension candidates. Maximal degree in co-relation 76172. Up to 5794 conditions per place. [2024-06-20 16:08:48,201 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 524 selfloop transitions, 50 changer transitions 0/578 dead transitions. [2024-06-20 16:08:48,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 578 transitions, 9587 flow [2024-06-20 16:08:48,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:08:48,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:08:48,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 213 transitions. [2024-06-20 16:08:48,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4503171247357294 [2024-06-20 16:08:48,205 INFO L175 Difference]: Start difference. First operand has 335 places, 524 transitions, 7473 flow. Second operand 11 states and 213 transitions. [2024-06-20 16:08:48,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 578 transitions, 9587 flow [2024-06-20 16:08:52,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 578 transitions, 9394 flow, removed 76 selfloop flow, removed 8 redundant places. [2024-06-20 16:08:52,064 INFO L231 Difference]: Finished difference. Result has 338 places, 528 transitions, 7643 flow [2024-06-20 16:08:52,065 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7280, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=524, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=474, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7643, PETRI_PLACES=338, PETRI_TRANSITIONS=528} [2024-06-20 16:08:52,065 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 294 predicate places. [2024-06-20 16:08:52,065 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 528 transitions, 7643 flow [2024-06-20 16:08:52,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:08:52,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:08:52,066 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:08:52,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-20 16:08:52,066 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:08:52,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:08:52,067 INFO L85 PathProgramCache]: Analyzing trace with hash 1547621499, now seen corresponding path program 3 times [2024-06-20 16:08:52,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:08:52,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285147298] [2024-06-20 16:08:52,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:08:52,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:08:52,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:08:53,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:08:53,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:08:53,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285147298] [2024-06-20 16:08:53,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285147298] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:08:53,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:08:53,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:08:53,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762228050] [2024-06-20 16:08:53,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:08:53,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:08:53,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:08:53,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:08:53,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:08:53,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 16:08:53,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 528 transitions, 7643 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:08:53,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:08:53,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 16:08:53,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:08:54,739 INFO L124 PetriNetUnfolderBase]: 3936/5942 cut-off events. [2024-06-20 16:08:54,739 INFO L125 PetriNetUnfolderBase]: For 1548772/1548772 co-relation queries the response was YES. [2024-06-20 16:08:54,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76315 conditions, 5942 events. 3936/5942 cut-off events. For 1548772/1548772 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 31920 event pairs, 587 based on Foata normal form. 4/5944 useless extension candidates. Maximal degree in co-relation 76164. Up to 5319 conditions per place. [2024-06-20 16:08:54,830 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 436 selfloop transitions, 22 changer transitions 0/573 dead transitions. [2024-06-20 16:08:54,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 573 transitions, 8848 flow [2024-06-20 16:08:54,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:08:54,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:08:54,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 191 transitions. [2024-06-20 16:08:54,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4441860465116279 [2024-06-20 16:08:54,832 INFO L175 Difference]: Start difference. First operand has 338 places, 528 transitions, 7643 flow. Second operand 10 states and 191 transitions. [2024-06-20 16:08:54,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 573 transitions, 8848 flow [2024-06-20 16:08:58,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 573 transitions, 8515 flow, removed 119 selfloop flow, removed 9 redundant places. [2024-06-20 16:08:58,632 INFO L231 Difference]: Finished difference. Result has 340 places, 532 transitions, 7556 flow [2024-06-20 16:08:58,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7310, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=528, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=507, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7556, PETRI_PLACES=340, PETRI_TRANSITIONS=532} [2024-06-20 16:08:58,632 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 296 predicate places. [2024-06-20 16:08:58,632 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 532 transitions, 7556 flow [2024-06-20 16:08:58,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:08:58,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:08:58,633 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:08:58,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-20 16:08:58,633 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:08:58,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:08:58,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1547806197, now seen corresponding path program 1 times [2024-06-20 16:08:58,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:08:58,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909198311] [2024-06-20 16:08:58,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:08:58,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:08:58,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:08:59,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:08:59,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:08:59,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909198311] [2024-06-20 16:08:59,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909198311] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:08:59,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:08:59,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:08:59,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089677085] [2024-06-20 16:08:59,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:08:59,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:08:59,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:08:59,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:08:59,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:09:00,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-20 16:09:00,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 532 transitions, 7556 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:00,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:09:00,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-20 16:09:00,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:09:01,715 INFO L124 PetriNetUnfolderBase]: 4206/6313 cut-off events. [2024-06-20 16:09:01,715 INFO L125 PetriNetUnfolderBase]: For 1785715/1785715 co-relation queries the response was YES. [2024-06-20 16:09:01,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81112 conditions, 6313 events. 4206/6313 cut-off events. For 1785715/1785715 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 33954 event pairs, 635 based on Foata normal form. 36/6347 useless extension candidates. Maximal degree in co-relation 80959. Up to 5830 conditions per place. [2024-06-20 16:09:01,812 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 525 selfloop transitions, 59 changer transitions 0/588 dead transitions. [2024-06-20 16:09:01,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 588 transitions, 9574 flow [2024-06-20 16:09:01,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:09:01,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:09:01,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 216 transitions. [2024-06-20 16:09:01,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45665961945031713 [2024-06-20 16:09:01,813 INFO L175 Difference]: Start difference. First operand has 340 places, 532 transitions, 7556 flow. Second operand 11 states and 216 transitions. [2024-06-20 16:09:01,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 588 transitions, 9574 flow [2024-06-20 16:09:05,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 588 transitions, 9363 flow, removed 86 selfloop flow, removed 7 redundant places. [2024-06-20 16:09:05,783 INFO L231 Difference]: Finished difference. Result has 344 places, 535 transitions, 7692 flow [2024-06-20 16:09:05,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7345, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=532, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=473, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7692, PETRI_PLACES=344, PETRI_TRANSITIONS=535} [2024-06-20 16:09:05,784 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 300 predicate places. [2024-06-20 16:09:05,784 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 535 transitions, 7692 flow [2024-06-20 16:09:05,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:05,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:09:05,785 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:09:05,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-20 16:09:05,785 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:09:05,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:09:05,785 INFO L85 PathProgramCache]: Analyzing trace with hash 1547805949, now seen corresponding path program 2 times [2024-06-20 16:09:05,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:09:05,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095358732] [2024-06-20 16:09:05,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:09:05,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:09:05,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:09:06,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:09:06,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:09:06,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095358732] [2024-06-20 16:09:06,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095358732] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:09:06,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:09:06,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:09:06,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948243717] [2024-06-20 16:09:06,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:09:06,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:09:06,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:09:06,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:09:06,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:09:07,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-20 16:09:07,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 535 transitions, 7692 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:07,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:09:07,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-20 16:09:07,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:09:08,756 INFO L124 PetriNetUnfolderBase]: 4224/6347 cut-off events. [2024-06-20 16:09:08,756 INFO L125 PetriNetUnfolderBase]: For 1664789/1664789 co-relation queries the response was YES. [2024-06-20 16:09:08,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81992 conditions, 6347 events. 4224/6347 cut-off events. For 1664789/1664789 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 34224 event pairs, 622 based on Foata normal form. 3/6348 useless extension candidates. Maximal degree in co-relation 81838. Up to 5979 conditions per place. [2024-06-20 16:09:08,854 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 506 selfloop transitions, 77 changer transitions 0/587 dead transitions. [2024-06-20 16:09:08,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 587 transitions, 9670 flow [2024-06-20 16:09:08,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:09:08,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:09:08,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 213 transitions. [2024-06-20 16:09:08,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4503171247357294 [2024-06-20 16:09:08,868 INFO L175 Difference]: Start difference. First operand has 344 places, 535 transitions, 7692 flow. Second operand 11 states and 213 transitions. [2024-06-20 16:09:08,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 587 transitions, 9670 flow [2024-06-20 16:09:12,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 587 transitions, 9459 flow, removed 50 selfloop flow, removed 9 redundant places. [2024-06-20 16:09:12,969 INFO L231 Difference]: Finished difference. Result has 346 places, 539 transitions, 7912 flow [2024-06-20 16:09:12,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7481, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=535, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=458, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7912, PETRI_PLACES=346, PETRI_TRANSITIONS=539} [2024-06-20 16:09:12,970 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 302 predicate places. [2024-06-20 16:09:12,970 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 539 transitions, 7912 flow [2024-06-20 16:09:12,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:12,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:09:12,970 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:09:12,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-20 16:09:12,971 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:09:12,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:09:12,971 INFO L85 PathProgramCache]: Analyzing trace with hash 1713260633, now seen corresponding path program 4 times [2024-06-20 16:09:12,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:09:12,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515028861] [2024-06-20 16:09:12,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:09:12,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:09:12,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:09:14,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:09:14,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:09:14,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515028861] [2024-06-20 16:09:14,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515028861] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:09:14,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:09:14,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:09:14,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375678414] [2024-06-20 16:09:14,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:09:14,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:09:14,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:09:14,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:09:14,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:09:14,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 16:09:14,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 539 transitions, 7912 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:14,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:09:14,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 16:09:14,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:09:15,908 INFO L124 PetriNetUnfolderBase]: 4106/6246 cut-off events. [2024-06-20 16:09:15,909 INFO L125 PetriNetUnfolderBase]: For 1672468/1672468 co-relation queries the response was YES. [2024-06-20 16:09:15,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80678 conditions, 6246 events. 4106/6246 cut-off events. For 1672468/1672468 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 34407 event pairs, 600 based on Foata normal form. 4/6248 useless extension candidates. Maximal degree in co-relation 80523. Up to 5555 conditions per place. [2024-06-20 16:09:15,998 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 435 selfloop transitions, 29 changer transitions 0/581 dead transitions. [2024-06-20 16:09:15,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 581 transitions, 9131 flow [2024-06-20 16:09:15,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:09:15,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:09:15,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 191 transitions. [2024-06-20 16:09:15,999 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4441860465116279 [2024-06-20 16:09:15,999 INFO L175 Difference]: Start difference. First operand has 346 places, 539 transitions, 7912 flow. Second operand 10 states and 191 transitions. [2024-06-20 16:09:15,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 581 transitions, 9131 flow [2024-06-20 16:09:19,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 581 transitions, 8730 flow, removed 126 selfloop flow, removed 9 redundant places. [2024-06-20 16:09:19,907 INFO L231 Difference]: Finished difference. Result has 348 places, 543 transitions, 7781 flow [2024-06-20 16:09:19,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7511, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=539, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=511, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7781, PETRI_PLACES=348, PETRI_TRANSITIONS=543} [2024-06-20 16:09:19,907 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 304 predicate places. [2024-06-20 16:09:19,907 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 543 transitions, 7781 flow [2024-06-20 16:09:19,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:19,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:09:19,908 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:09:19,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-20 16:09:19,908 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:09:19,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:09:19,908 INFO L85 PathProgramCache]: Analyzing trace with hash 1713445083, now seen corresponding path program 3 times [2024-06-20 16:09:19,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:09:19,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864608826] [2024-06-20 16:09:19,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:09:19,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:09:19,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:09:21,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:09:21,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:09:21,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864608826] [2024-06-20 16:09:21,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864608826] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:09:21,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:09:21,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:09:21,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031585094] [2024-06-20 16:09:21,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:09:21,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:09:21,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:09:21,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:09:21,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:09:21,156 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-20 16:09:21,157 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 543 transitions, 7781 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:21,157 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:09:21,157 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-20 16:09:21,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:09:23,047 INFO L124 PetriNetUnfolderBase]: 4259/6406 cut-off events. [2024-06-20 16:09:23,047 INFO L125 PetriNetUnfolderBase]: For 1701512/1701512 co-relation queries the response was YES. [2024-06-20 16:09:23,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82430 conditions, 6406 events. 4259/6406 cut-off events. For 1701512/1701512 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 34707 event pairs, 624 based on Foata normal form. 3/6407 useless extension candidates. Maximal degree in co-relation 82273. Up to 5899 conditions per place. [2024-06-20 16:09:23,152 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 503 selfloop transitions, 89 changer transitions 0/596 dead transitions. [2024-06-20 16:09:23,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 596 transitions, 10036 flow [2024-06-20 16:09:23,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:09:23,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:09:23,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 215 transitions. [2024-06-20 16:09:23,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-20 16:09:23,153 INFO L175 Difference]: Start difference. First operand has 348 places, 543 transitions, 7781 flow. Second operand 11 states and 215 transitions. [2024-06-20 16:09:23,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 596 transitions, 10036 flow [2024-06-20 16:09:27,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 596 transitions, 9801 flow, removed 91 selfloop flow, removed 7 redundant places. [2024-06-20 16:09:27,574 INFO L231 Difference]: Finished difference. Result has 352 places, 547 transitions, 8011 flow [2024-06-20 16:09:27,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7546, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=543, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=454, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8011, PETRI_PLACES=352, PETRI_TRANSITIONS=547} [2024-06-20 16:09:27,574 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 308 predicate places. [2024-06-20 16:09:27,574 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 547 transitions, 8011 flow [2024-06-20 16:09:27,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:27,575 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:09:27,575 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:09:27,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-20 16:09:27,575 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:09:27,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:09:27,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1713445331, now seen corresponding path program 2 times [2024-06-20 16:09:27,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:09:27,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677589043] [2024-06-20 16:09:27,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:09:27,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:09:27,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:09:28,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:09:28,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:09:28,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677589043] [2024-06-20 16:09:28,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677589043] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:09:28,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:09:28,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:09:28,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674718692] [2024-06-20 16:09:28,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:09:28,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:09:28,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:09:28,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:09:28,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:09:28,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-20 16:09:28,862 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 547 transitions, 8011 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:28,862 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:09:28,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-20 16:09:28,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:09:30,775 INFO L124 PetriNetUnfolderBase]: 4411/6654 cut-off events. [2024-06-20 16:09:30,775 INFO L125 PetriNetUnfolderBase]: For 1954731/1954731 co-relation queries the response was YES. [2024-06-20 16:09:30,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87170 conditions, 6654 events. 4411/6654 cut-off events. For 1954731/1954731 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 36595 event pairs, 647 based on Foata normal form. 36/6688 useless extension candidates. Maximal degree in co-relation 87012. Up to 6011 conditions per place. [2024-06-20 16:09:30,888 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 522 selfloop transitions, 78 changer transitions 0/604 dead transitions. [2024-06-20 16:09:30,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 604 transitions, 10344 flow [2024-06-20 16:09:30,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:09:30,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:09:30,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 218 transitions. [2024-06-20 16:09:30,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4608879492600423 [2024-06-20 16:09:30,889 INFO L175 Difference]: Start difference. First operand has 352 places, 547 transitions, 8011 flow. Second operand 11 states and 218 transitions. [2024-06-20 16:09:30,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 604 transitions, 10344 flow [2024-06-20 16:09:35,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 604 transitions, 9909 flow, removed 131 selfloop flow, removed 9 redundant places. [2024-06-20 16:09:35,645 INFO L231 Difference]: Finished difference. Result has 354 places, 550 transitions, 7977 flow [2024-06-20 16:09:35,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7576, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=469, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7977, PETRI_PLACES=354, PETRI_TRANSITIONS=550} [2024-06-20 16:09:35,646 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 310 predicate places. [2024-06-20 16:09:35,646 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 550 transitions, 7977 flow [2024-06-20 16:09:35,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:35,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:09:35,646 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:09:35,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-20 16:09:35,646 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:09:35,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:09:35,647 INFO L85 PathProgramCache]: Analyzing trace with hash 2039108175, now seen corresponding path program 4 times [2024-06-20 16:09:35,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:09:35,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078457589] [2024-06-20 16:09:35,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:09:35,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:09:35,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:09:37,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:09:37,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:09:37,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078457589] [2024-06-20 16:09:37,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078457589] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:09:37,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:09:37,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:09:37,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40009553] [2024-06-20 16:09:37,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:09:37,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:09:37,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:09:37,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:09:37,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:09:37,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-20 16:09:37,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 550 transitions, 7977 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:37,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:09:37,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-20 16:09:37,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:09:39,227 INFO L124 PetriNetUnfolderBase]: 4429/6688 cut-off events. [2024-06-20 16:09:39,227 INFO L125 PetriNetUnfolderBase]: For 1831327/1831327 co-relation queries the response was YES. [2024-06-20 16:09:39,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87882 conditions, 6688 events. 4429/6688 cut-off events. For 1831327/1831327 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 36864 event pairs, 639 based on Foata normal form. 3/6689 useless extension candidates. Maximal degree in co-relation 87723. Up to 6116 conditions per place. [2024-06-20 16:09:39,336 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 485 selfloop transitions, 119 changer transitions 0/608 dead transitions. [2024-06-20 16:09:39,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 608 transitions, 10056 flow [2024-06-20 16:09:39,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-20 16:09:39,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-20 16:09:39,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 248 transitions. [2024-06-20 16:09:39,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44364937388193204 [2024-06-20 16:09:39,337 INFO L175 Difference]: Start difference. First operand has 354 places, 550 transitions, 7977 flow. Second operand 13 states and 248 transitions. [2024-06-20 16:09:39,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 608 transitions, 10056 flow [2024-06-20 16:09:43,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 608 transitions, 9799 flow, removed 54 selfloop flow, removed 9 redundant places. [2024-06-20 16:09:43,713 INFO L231 Difference]: Finished difference. Result has 359 places, 555 transitions, 8272 flow [2024-06-20 16:09:43,714 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7720, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=550, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=8272, PETRI_PLACES=359, PETRI_TRANSITIONS=555} [2024-06-20 16:09:43,714 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 315 predicate places. [2024-06-20 16:09:43,714 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 555 transitions, 8272 flow [2024-06-20 16:09:43,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:43,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:09:43,714 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:09:43,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-20 16:09:43,715 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:09:43,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:09:43,715 INFO L85 PathProgramCache]: Analyzing trace with hash -1418986245, now seen corresponding path program 3 times [2024-06-20 16:09:43,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:09:43,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004160486] [2024-06-20 16:09:43,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:09:43,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:09:43,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:09:44,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:09:44,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:09:44,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004160486] [2024-06-20 16:09:44,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004160486] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:09:44,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:09:44,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:09:44,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567013600] [2024-06-20 16:09:44,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:09:44,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:09:44,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:09:44,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:09:44,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:09:44,934 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-20 16:09:44,934 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 555 transitions, 8272 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:44,934 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:09:44,934 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-20 16:09:44,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:09:47,075 INFO L124 PetriNetUnfolderBase]: 4581/6931 cut-off events. [2024-06-20 16:09:47,075 INFO L125 PetriNetUnfolderBase]: For 2056228/2056228 co-relation queries the response was YES. [2024-06-20 16:09:47,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91865 conditions, 6931 events. 4581/6931 cut-off events. For 2056228/2056228 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 38599 event pairs, 660 based on Foata normal form. 36/6965 useless extension candidates. Maximal degree in co-relation 91704. Up to 6199 conditions per place. [2024-06-20 16:09:47,187 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 497 selfloop transitions, 111 changer transitions 0/612 dead transitions. [2024-06-20 16:09:47,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 612 transitions, 10406 flow [2024-06-20 16:09:47,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 16:09:47,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 16:09:47,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 236 transitions. [2024-06-20 16:09:47,188 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573643410852713 [2024-06-20 16:09:47,189 INFO L175 Difference]: Start difference. First operand has 359 places, 555 transitions, 8272 flow. Second operand 12 states and 236 transitions. [2024-06-20 16:09:47,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 612 transitions, 10406 flow [2024-06-20 16:09:51,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 612 transitions, 9896 flow, removed 140 selfloop flow, removed 10 redundant places. [2024-06-20 16:09:51,704 INFO L231 Difference]: Finished difference. Result has 361 places, 558 transitions, 8240 flow [2024-06-20 16:09:51,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7762, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=555, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=444, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8240, PETRI_PLACES=361, PETRI_TRANSITIONS=558} [2024-06-20 16:09:51,704 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 317 predicate places. [2024-06-20 16:09:51,705 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 558 transitions, 8240 flow [2024-06-20 16:09:51,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:51,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:09:51,705 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:09:51,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-20 16:09:51,705 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:09:51,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:09:51,705 INFO L85 PathProgramCache]: Analyzing trace with hash -715172987, now seen corresponding path program 4 times [2024-06-20 16:09:51,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:09:51,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482496161] [2024-06-20 16:09:51,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:09:51,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:09:51,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:09:52,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:09:52,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:09:52,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482496161] [2024-06-20 16:09:52,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482496161] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:09:52,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:09:52,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:09:52,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005980167] [2024-06-20 16:09:52,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:09:52,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:09:52,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:09:52,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:09:52,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:09:52,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-20 16:09:52,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 558 transitions, 8240 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:52,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:09:52,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-20 16:09:52,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:09:55,049 INFO L124 PetriNetUnfolderBase]: 4609/6980 cut-off events. [2024-06-20 16:09:55,049 INFO L125 PetriNetUnfolderBase]: For 1951025/1951025 co-relation queries the response was YES. [2024-06-20 16:09:55,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92806 conditions, 6980 events. 4609/6980 cut-off events. For 1951025/1951025 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 38942 event pairs, 664 based on Foata normal form. 6/6984 useless extension candidates. Maximal degree in co-relation 92644. Up to 5775 conditions per place. [2024-06-20 16:09:55,183 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 487 selfloop transitions, 121 changer transitions 0/612 dead transitions. [2024-06-20 16:09:55,183 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 612 transitions, 10376 flow [2024-06-20 16:09:55,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:09:55,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:09:55,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 218 transitions. [2024-06-20 16:09:55,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4608879492600423 [2024-06-20 16:09:55,190 INFO L175 Difference]: Start difference. First operand has 361 places, 558 transitions, 8240 flow. Second operand 11 states and 218 transitions. [2024-06-20 16:09:55,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 612 transitions, 10376 flow [2024-06-20 16:09:59,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 612 transitions, 10048 flow, removed 57 selfloop flow, removed 10 redundant places. [2024-06-20 16:09:59,841 INFO L231 Difference]: Finished difference. Result has 362 places, 561 transitions, 8412 flow [2024-06-20 16:09:59,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7912, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=558, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=437, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8412, PETRI_PLACES=362, PETRI_TRANSITIONS=561} [2024-06-20 16:09:59,841 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 318 predicate places. [2024-06-20 16:09:59,841 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 561 transitions, 8412 flow [2024-06-20 16:09:59,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:59,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:09:59,842 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:09:59,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-20 16:09:59,842 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:09:59,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:09:59,842 INFO L85 PathProgramCache]: Analyzing trace with hash 2070715785, now seen corresponding path program 1 times [2024-06-20 16:09:59,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:09:59,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675257490] [2024-06-20 16:09:59,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:09:59,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:09:59,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:10:00,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:10:00,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:10:00,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675257490] [2024-06-20 16:10:00,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675257490] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:10:00,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:10:00,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:10:00,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182759972] [2024-06-20 16:10:00,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:10:00,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:10:00,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:10:00,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:10:00,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:10:00,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-20 16:10:00,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 561 transitions, 8412 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:10:00,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:10:00,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-20 16:10:00,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:10:02,757 INFO L124 PetriNetUnfolderBase]: 4619/6998 cut-off events. [2024-06-20 16:10:02,757 INFO L125 PetriNetUnfolderBase]: For 1910127/1910127 co-relation queries the response was YES. [2024-06-20 16:10:02,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92305 conditions, 6998 events. 4619/6998 cut-off events. For 1910127/1910127 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 39228 event pairs, 685 based on Foata normal form. 2/6998 useless extension candidates. Maximal degree in co-relation 92142. Up to 6770 conditions per place. [2024-06-20 16:10:02,884 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 552 selfloop transitions, 41 changer transitions 0/597 dead transitions. [2024-06-20 16:10:02,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 597 transitions, 10026 flow [2024-06-20 16:10:02,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:10:02,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:10:02,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-20 16:10:02,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44476744186046513 [2024-06-20 16:10:02,886 INFO L175 Difference]: Start difference. First operand has 362 places, 561 transitions, 8412 flow. Second operand 8 states and 153 transitions. [2024-06-20 16:10:02,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 597 transitions, 10026 flow [2024-06-20 16:10:08,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 597 transitions, 9544 flow, removed 119 selfloop flow, removed 9 redundant places. [2024-06-20 16:10:08,338 INFO L231 Difference]: Finished difference. Result has 361 places, 566 transitions, 8140 flow [2024-06-20 16:10:08,339 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7936, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=525, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8140, PETRI_PLACES=361, PETRI_TRANSITIONS=566} [2024-06-20 16:10:08,339 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 317 predicate places. [2024-06-20 16:10:08,339 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 566 transitions, 8140 flow [2024-06-20 16:10:08,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:10:08,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:10:08,340 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:10:08,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-20 16:10:08,340 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:10:08,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:10:08,340 INFO L85 PathProgramCache]: Analyzing trace with hash 531170329, now seen corresponding path program 2 times [2024-06-20 16:10:08,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:10:08,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938580987] [2024-06-20 16:10:08,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:10:08,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:10:08,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:10:09,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:10:09,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:10:09,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938580987] [2024-06-20 16:10:09,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938580987] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:10:09,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:10:09,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:10:09,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391303213] [2024-06-20 16:10:09,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:10:09,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:10:09,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:10:09,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:10:09,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:10:09,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-20 16:10:09,230 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 566 transitions, 8140 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:10:09,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:10:09,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-20 16:10:09,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:10:11,173 INFO L124 PetriNetUnfolderBase]: 4629/7014 cut-off events. [2024-06-20 16:10:11,173 INFO L125 PetriNetUnfolderBase]: For 1922053/1922053 co-relation queries the response was YES. [2024-06-20 16:10:11,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91428 conditions, 7014 events. 4629/7014 cut-off events. For 1922053/1922053 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 39277 event pairs, 685 based on Foata normal form. 2/7014 useless extension candidates. Maximal degree in co-relation 91264. Up to 6780 conditions per place. [2024-06-20 16:10:11,288 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 549 selfloop transitions, 44 changer transitions 0/597 dead transitions. [2024-06-20 16:10:11,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 597 transitions, 9759 flow [2024-06-20 16:10:11,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:10:11,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:10:11,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-20 16:10:11,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331395348837209 [2024-06-20 16:10:11,290 INFO L175 Difference]: Start difference. First operand has 361 places, 566 transitions, 8140 flow. Second operand 8 states and 149 transitions. [2024-06-20 16:10:11,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 597 transitions, 9759 flow [2024-06-20 16:10:16,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 597 transitions, 9623 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-20 16:10:16,520 INFO L231 Difference]: Finished difference. Result has 364 places, 571 transitions, 8223 flow [2024-06-20 16:10:16,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8009, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=566, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=527, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8223, PETRI_PLACES=364, PETRI_TRANSITIONS=571} [2024-06-20 16:10:16,521 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 320 predicate places. [2024-06-20 16:10:16,521 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 571 transitions, 8223 flow [2024-06-20 16:10:16,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:10:16,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:10:16,521 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:10:16,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-20 16:10:16,521 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:10:16,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:10:16,522 INFO L85 PathProgramCache]: Analyzing trace with hash 2071044478, now seen corresponding path program 1 times [2024-06-20 16:10:16,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:10:16,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914819780] [2024-06-20 16:10:16,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:10:16,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:10:16,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:10:17,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:10:17,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:10:17,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914819780] [2024-06-20 16:10:17,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914819780] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:10:17,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:10:17,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:10:17,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068090413] [2024-06-20 16:10:17,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:10:17,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:10:17,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:10:17,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:10:17,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:10:17,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-20 16:10:17,431 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 571 transitions, 8223 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:10:17,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:10:17,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-20 16:10:17,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:10:19,434 INFO L124 PetriNetUnfolderBase]: 4634/7021 cut-off events. [2024-06-20 16:10:19,434 INFO L125 PetriNetUnfolderBase]: For 1936291/1936291 co-relation queries the response was YES. [2024-06-20 16:10:19,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91718 conditions, 7021 events. 4634/7021 cut-off events. For 1936291/1936291 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 39307 event pairs, 685 based on Foata normal form. 1/7020 useless extension candidates. Maximal degree in co-relation 91553. Up to 6815 conditions per place. [2024-06-20 16:10:19,536 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 557 selfloop transitions, 40 changer transitions 0/601 dead transitions. [2024-06-20 16:10:19,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 601 transitions, 9807 flow [2024-06-20 16:10:19,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:10:19,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:10:19,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-20 16:10:19,537 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273255813953488 [2024-06-20 16:10:19,537 INFO L175 Difference]: Start difference. First operand has 364 places, 571 transitions, 8223 flow. Second operand 8 states and 147 transitions. [2024-06-20 16:10:19,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 601 transitions, 9807 flow [2024-06-20 16:10:24,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 601 transitions, 9674 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-20 16:10:24,414 INFO L231 Difference]: Finished difference. Result has 367 places, 577 transitions, 8290 flow [2024-06-20 16:10:24,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8090, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=571, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=534, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8290, PETRI_PLACES=367, PETRI_TRANSITIONS=577} [2024-06-20 16:10:24,414 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 323 predicate places. [2024-06-20 16:10:24,414 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 577 transitions, 8290 flow [2024-06-20 16:10:24,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:10:24,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:10:24,415 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:10:24,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-20 16:10:24,415 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:10:24,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:10:24,415 INFO L85 PathProgramCache]: Analyzing trace with hash 536561911, now seen corresponding path program 1 times [2024-06-20 16:10:24,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:10:24,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867662610] [2024-06-20 16:10:24,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:10:24,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:10:24,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:10:25,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:10:25,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:10:25,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867662610] [2024-06-20 16:10:25,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867662610] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:10:25,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:10:25,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:10:25,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503022095] [2024-06-20 16:10:25,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:10:25,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:10:25,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:10:25,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:10:25,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:10:25,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 16:10:25,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 577 transitions, 8290 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) [2024-06-20 16:10:25,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:10:25,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 16:10:25,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:10:27,012 INFO L124 PetriNetUnfolderBase]: 4428/6808 cut-off events. [2024-06-20 16:10:27,013 INFO L125 PetriNetUnfolderBase]: For 1982595/1982595 co-relation queries the response was YES. [2024-06-20 16:10:27,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90970 conditions, 6808 events. 4428/6808 cut-off events. For 1982595/1982595 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 38991 event pairs, 669 based on Foata normal form. 2/6786 useless extension candidates. Maximal degree in co-relation 90804. Up to 6292 conditions per place. [2024-06-20 16:10:27,128 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 531 selfloop transitions, 27 changer transitions 0/600 dead transitions. [2024-06-20 16:10:27,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 600 transitions, 9756 flow [2024-06-20 16:10:27,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:10:27,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:10:27,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-20 16:10:27,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45182724252491696 [2024-06-20 16:10:27,130 INFO L175 Difference]: Start difference. First operand has 367 places, 577 transitions, 8290 flow. Second operand 7 states and 136 transitions. [2024-06-20 16:10:27,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 600 transitions, 9756 flow [2024-06-20 16:10:33,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 600 transitions, 9666 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-20 16:10:33,136 INFO L231 Difference]: Finished difference. Result has 370 places, 580 transitions, 8340 flow [2024-06-20 16:10:33,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8200, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=577, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=552, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8340, PETRI_PLACES=370, PETRI_TRANSITIONS=580} [2024-06-20 16:10:33,137 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 326 predicate places. [2024-06-20 16:10:33,137 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 580 transitions, 8340 flow [2024-06-20 16:10:33,137 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) [2024-06-20 16:10:33,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:10:33,137 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:10:33,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-20 16:10:33,138 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:10:33,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:10:33,138 INFO L85 PathProgramCache]: Analyzing trace with hash 2076585387, now seen corresponding path program 2 times [2024-06-20 16:10:33,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:10:33,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523290843] [2024-06-20 16:10:33,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:10:33,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:10:33,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:10:33,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:10:33,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:10:33,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523290843] [2024-06-20 16:10:33,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523290843] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:10:33,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:10:33,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:10:33,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609155048] [2024-06-20 16:10:33,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:10:33,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:10:33,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:10:33,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:10:33,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:10:33,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 16:10:33,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 580 transitions, 8340 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) [2024-06-20 16:10:33,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:10:33,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 16:10:33,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:10:35,668 INFO L124 PetriNetUnfolderBase]: 4433/6815 cut-off events. [2024-06-20 16:10:35,669 INFO L125 PetriNetUnfolderBase]: For 2005207/2005207 co-relation queries the response was YES. [2024-06-20 16:10:35,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91272 conditions, 6815 events. 4433/6815 cut-off events. For 2005207/2005207 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 39067 event pairs, 669 based on Foata normal form. 1/6792 useless extension candidates. Maximal degree in co-relation 91104. Up to 6332 conditions per place. [2024-06-20 16:10:35,791 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 538 selfloop transitions, 19 changer transitions 0/599 dead transitions. [2024-06-20 16:10:35,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 599 transitions, 9576 flow [2024-06-20 16:10:35,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:10:35,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:10:35,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-20 16:10:35,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-20 16:10:35,793 INFO L175 Difference]: Start difference. First operand has 370 places, 580 transitions, 8340 flow. Second operand 7 states and 129 transitions. [2024-06-20 16:10:35,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 599 transitions, 9576 flow [2024-06-20 16:10:42,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 599 transitions, 9520 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-20 16:10:42,425 INFO L231 Difference]: Finished difference. Result has 373 places, 583 transitions, 8416 flow [2024-06-20 16:10:42,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8286, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=580, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=561, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8416, PETRI_PLACES=373, PETRI_TRANSITIONS=583} [2024-06-20 16:10:42,426 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 329 predicate places. [2024-06-20 16:10:42,426 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 583 transitions, 8416 flow [2024-06-20 16:10:42,426 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) [2024-06-20 16:10:42,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:10:42,426 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:10:42,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-20 16:10:42,426 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:10:42,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:10:42,427 INFO L85 PathProgramCache]: Analyzing trace with hash 291496721, now seen corresponding path program 5 times [2024-06-20 16:10:42,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:10:42,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162268213] [2024-06-20 16:10:42,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:10:42,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:10:42,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:10:43,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:10:43,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:10:43,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162268213] [2024-06-20 16:10:43,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162268213] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:10:43,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:10:43,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:10:43,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422435081] [2024-06-20 16:10:43,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:10:43,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:10:43,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:10:43,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:10:43,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:10:43,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 16:10:43,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 583 transitions, 8416 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:10:43,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:10:43,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 16:10:43,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:10:45,682 INFO L124 PetriNetUnfolderBase]: 4490/6886 cut-off events. [2024-06-20 16:10:45,682 INFO L125 PetriNetUnfolderBase]: For 2034233/2034233 co-relation queries the response was YES. [2024-06-20 16:10:45,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90931 conditions, 6886 events. 4490/6886 cut-off events. For 2034233/2034233 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 39278 event pairs, 643 based on Foata normal form. 4/6888 useless extension candidates. Maximal degree in co-relation 90762. Up to 6088 conditions per place. [2024-06-20 16:10:45,808 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 456 selfloop transitions, 38 changer transitions 0/622 dead transitions. [2024-06-20 16:10:45,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 622 transitions, 9703 flow [2024-06-20 16:10:45,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:10:45,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:10:45,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-20 16:10:45,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-20 16:10:45,810 INFO L175 Difference]: Start difference. First operand has 373 places, 583 transitions, 8416 flow. Second operand 10 states and 190 transitions. [2024-06-20 16:10:45,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 622 transitions, 9703 flow [2024-06-20 16:10:50,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 622 transitions, 9649 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-20 16:10:50,887 INFO L231 Difference]: Finished difference. Result has 379 places, 587 transitions, 8666 flow [2024-06-20 16:10:50,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8362, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=583, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=546, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8666, PETRI_PLACES=379, PETRI_TRANSITIONS=587} [2024-06-20 16:10:50,887 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 335 predicate places. [2024-06-20 16:10:50,887 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 587 transitions, 8666 flow [2024-06-20 16:10:50,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:10:50,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:10:50,888 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:10:50,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-20 16:10:50,888 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:10:50,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:10:50,889 INFO L85 PathProgramCache]: Analyzing trace with hash 519821579, now seen corresponding path program 5 times [2024-06-20 16:10:50,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:10:50,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636194888] [2024-06-20 16:10:50,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:10:50,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:10:50,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:10:52,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:10:52,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:10:52,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636194888] [2024-06-20 16:10:52,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636194888] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:10:52,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:10:52,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:10:52,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667782234] [2024-06-20 16:10:52,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:10:52,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:10:52,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:10:52,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:10:52,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:10:52,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-20 16:10:52,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 587 transitions, 8666 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:10:52,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:10:52,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-20 16:10:52,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:10:54,470 INFO L124 PetriNetUnfolderBase]: 4922/7480 cut-off events. [2024-06-20 16:10:54,470 INFO L125 PetriNetUnfolderBase]: For 2389986/2389986 co-relation queries the response was YES. [2024-06-20 16:10:54,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104562 conditions, 7480 events. 4922/7480 cut-off events. For 2389986/2389986 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 42609 event pairs, 708 based on Foata normal form. 6/7484 useless extension candidates. Maximal degree in co-relation 104391. Up to 6420 conditions per place. [2024-06-20 16:10:54,605 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 488 selfloop transitions, 153 changer transitions 0/645 dead transitions. [2024-06-20 16:10:54,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 645 transitions, 11567 flow [2024-06-20 16:10:54,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:10:54,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:10:54,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 222 transitions. [2024-06-20 16:10:54,606 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4693446088794926 [2024-06-20 16:10:54,606 INFO L175 Difference]: Start difference. First operand has 379 places, 587 transitions, 8666 flow. Second operand 11 states and 222 transitions. [2024-06-20 16:10:54,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 645 transitions, 11567 flow [2024-06-20 16:11:01,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 645 transitions, 11298 flow, removed 99 selfloop flow, removed 7 redundant places. [2024-06-20 16:11:01,744 INFO L231 Difference]: Finished difference. Result has 384 places, 596 transitions, 9257 flow [2024-06-20 16:11:01,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8397, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=587, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=437, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9257, PETRI_PLACES=384, PETRI_TRANSITIONS=596} [2024-06-20 16:11:01,745 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 340 predicate places. [2024-06-20 16:11:01,745 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 596 transitions, 9257 flow [2024-06-20 16:11:01,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:11:01,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:11:01,745 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:11:01,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-20 16:11:01,746 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:11:01,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:11:01,746 INFO L85 PathProgramCache]: Analyzing trace with hash 200636867, now seen corresponding path program 6 times [2024-06-20 16:11:01,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:11:01,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843742381] [2024-06-20 16:11:01,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:11:01,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:11:01,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:11:03,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:11:03,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:11:03,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843742381] [2024-06-20 16:11:03,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843742381] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:11:03,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:11:03,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:11:03,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309546863] [2024-06-20 16:11:03,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:11:03,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:11:03,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:11:03,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:11:03,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:11:03,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-20 16:11:03,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 596 transitions, 9257 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:11:03,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:11:03,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-20 16:11:03,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:11:05,512 INFO L124 PetriNetUnfolderBase]: 4866/7395 cut-off events. [2024-06-20 16:11:05,512 INFO L125 PetriNetUnfolderBase]: For 2396289/2396289 co-relation queries the response was YES. [2024-06-20 16:11:05,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100187 conditions, 7395 events. 4866/7395 cut-off events. For 2396289/2396289 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 41991 event pairs, 683 based on Foata normal form. 36/7429 useless extension candidates. Maximal degree in co-relation 100014. Up to 6464 conditions per place. [2024-06-20 16:11:05,653 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 493 selfloop transitions, 149 changer transitions 0/646 dead transitions. [2024-06-20 16:11:05,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 646 transitions, 11226 flow [2024-06-20 16:11:05,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 16:11:05,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 16:11:05,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 234 transitions. [2024-06-20 16:11:05,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45348837209302323 [2024-06-20 16:11:05,655 INFO L175 Difference]: Start difference. First operand has 384 places, 596 transitions, 9257 flow. Second operand 12 states and 234 transitions. [2024-06-20 16:11:05,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 646 transitions, 11226 flow [2024-06-20 16:11:12,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 646 transitions, 10662 flow, removed 183 selfloop flow, removed 7 redundant places. [2024-06-20 16:11:12,617 INFO L231 Difference]: Finished difference. Result has 389 places, 596 transitions, 9003 flow [2024-06-20 16:11:12,618 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8693, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=596, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=447, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=9003, PETRI_PLACES=389, PETRI_TRANSITIONS=596} [2024-06-20 16:11:12,618 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 345 predicate places. [2024-06-20 16:11:12,618 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 596 transitions, 9003 flow [2024-06-20 16:11:12,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:11:12,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:11:12,618 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:11:12,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-20 16:11:12,619 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:11:12,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:11:12,619 INFO L85 PathProgramCache]: Analyzing trace with hash -27494923, now seen corresponding path program 7 times [2024-06-20 16:11:12,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:11:12,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491606759] [2024-06-20 16:11:12,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:11:12,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:11:12,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:11:13,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:11:13,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:11:13,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491606759] [2024-06-20 16:11:13,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491606759] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:11:13,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:11:13,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:11:13,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197850710] [2024-06-20 16:11:13,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:11:13,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:11:13,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:11:13,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:11:13,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:11:13,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-20 16:11:13,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 596 transitions, 9003 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:11:13,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:11:13,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-20 16:11:13,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:11:16,840 INFO L124 PetriNetUnfolderBase]: 5018/7639 cut-off events. [2024-06-20 16:11:16,840 INFO L125 PetriNetUnfolderBase]: For 2446920/2446920 co-relation queries the response was YES. [2024-06-20 16:11:16,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103428 conditions, 7639 events. 5018/7639 cut-off events. For 2446920/2446920 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 43903 event pairs, 699 based on Foata normal form. 36/7673 useless extension candidates. Maximal degree in co-relation 103253. Up to 6746 conditions per place. [2024-06-20 16:11:16,973 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 527 selfloop transitions, 118 changer transitions 0/649 dead transitions. [2024-06-20 16:11:16,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 649 transitions, 11736 flow [2024-06-20 16:11:16,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:11:16,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:11:16,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 219 transitions. [2024-06-20 16:11:16,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4630021141649049 [2024-06-20 16:11:16,974 INFO L175 Difference]: Start difference. First operand has 389 places, 596 transitions, 9003 flow. Second operand 11 states and 219 transitions. [2024-06-20 16:11:16,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 649 transitions, 11736 flow [2024-06-20 16:11:23,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 649 transitions, 11365 flow, removed 4 selfloop flow, removed 11 redundant places. [2024-06-20 16:11:23,818 INFO L231 Difference]: Finished difference. Result has 389 places, 599 transitions, 9143 flow [2024-06-20 16:11:23,818 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8632, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=596, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=478, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9143, PETRI_PLACES=389, PETRI_TRANSITIONS=599} [2024-06-20 16:11:23,818 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 345 predicate places. [2024-06-20 16:11:23,818 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 599 transitions, 9143 flow [2024-06-20 16:11:23,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:11:23,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:11:23,819 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:11:23,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-20 16:11:23,819 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:11:23,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:11:23,819 INFO L85 PathProgramCache]: Analyzing trace with hash -27495171, now seen corresponding path program 5 times [2024-06-20 16:11:23,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:11:23,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063251534] [2024-06-20 16:11:23,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:11:23,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:11:23,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:11:25,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:11:25,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:11:25,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063251534] [2024-06-20 16:11:25,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063251534] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:11:25,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:11:25,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:11:25,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458725252] [2024-06-20 16:11:25,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:11:25,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:11:25,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:11:25,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:11:25,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:11:25,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-20 16:11:25,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 599 transitions, 9143 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:11:25,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:11:25,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-20 16:11:25,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:11:28,134 INFO L124 PetriNetUnfolderBase]: 5036/7677 cut-off events. [2024-06-20 16:11:28,135 INFO L125 PetriNetUnfolderBase]: For 2290885/2290885 co-relation queries the response was YES. [2024-06-20 16:11:28,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104439 conditions, 7677 events. 5036/7677 cut-off events. For 2290885/2290885 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 44276 event pairs, 703 based on Foata normal form. 3/7678 useless extension candidates. Maximal degree in co-relation 104263. Up to 6898 conditions per place. [2024-06-20 16:11:28,276 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 509 selfloop transitions, 135 changer transitions 0/648 dead transitions. [2024-06-20 16:11:28,276 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 648 transitions, 11830 flow [2024-06-20 16:11:28,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:11:28,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:11:28,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 216 transitions. [2024-06-20 16:11:28,277 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45665961945031713 [2024-06-20 16:11:28,277 INFO L175 Difference]: Start difference. First operand has 389 places, 599 transitions, 9143 flow. Second operand 11 states and 216 transitions. [2024-06-20 16:11:28,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 648 transitions, 11830 flow [2024-06-20 16:11:34,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 648 transitions, 11467 flow, removed 67 selfloop flow, removed 9 redundant places. [2024-06-20 16:11:34,159 INFO L231 Difference]: Finished difference. Result has 391 places, 603 transitions, 9375 flow [2024-06-20 16:11:34,160 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8780, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=599, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=464, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9375, PETRI_PLACES=391, PETRI_TRANSITIONS=603} [2024-06-20 16:11:34,160 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 347 predicate places. [2024-06-20 16:11:34,160 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 603 transitions, 9375 flow [2024-06-20 16:11:34,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:11:34,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:11:34,161 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:11:34,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-20 16:11:34,161 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:11:34,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:11:34,161 INFO L85 PathProgramCache]: Analyzing trace with hash -20999803, now seen corresponding path program 8 times [2024-06-20 16:11:34,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:11:34,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159585535] [2024-06-20 16:11:34,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:11:34,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:11:34,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:11:35,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:11:35,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:11:35,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159585535] [2024-06-20 16:11:35,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159585535] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:11:35,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:11:35,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:11:35,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790785593] [2024-06-20 16:11:35,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:11:35,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:11:35,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:11:35,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:11:35,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:11:35,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-20 16:11:35,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 603 transitions, 9375 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:11:35,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:11:35,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-20 16:11:35,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:11:38,159 INFO L124 PetriNetUnfolderBase]: 5102/7775 cut-off events. [2024-06-20 16:11:38,159 INFO L125 PetriNetUnfolderBase]: For 2359235/2359235 co-relation queries the response was YES. [2024-06-20 16:11:38,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106369 conditions, 7775 events. 5102/7775 cut-off events. For 2359235/2359235 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 44951 event pairs, 722 based on Foata normal form. 6/7779 useless extension candidates. Maximal degree in co-relation 106192. Up to 7101 conditions per place. [2024-06-20 16:11:38,283 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 545 selfloop transitions, 110 changer transitions 0/659 dead transitions. [2024-06-20 16:11:38,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 659 transitions, 12636 flow [2024-06-20 16:11:38,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:11:38,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:11:38,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 215 transitions. [2024-06-20 16:11:38,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-20 16:11:38,284 INFO L175 Difference]: Start difference. First operand has 391 places, 603 transitions, 9375 flow. Second operand 11 states and 215 transitions. [2024-06-20 16:11:38,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 659 transitions, 12636 flow [2024-06-20 16:11:44,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 659 transitions, 12071 flow, removed 150 selfloop flow, removed 9 redundant places. [2024-06-20 16:11:44,888 INFO L231 Difference]: Finished difference. Result has 394 places, 614 transitions, 9752 flow [2024-06-20 16:11:44,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8810, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=603, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=499, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9752, PETRI_PLACES=394, PETRI_TRANSITIONS=614} [2024-06-20 16:11:44,889 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 350 predicate places. [2024-06-20 16:11:44,889 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 614 transitions, 9752 flow [2024-06-20 16:11:44,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:11:44,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:11:44,889 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:11:44,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-20 16:11:44,889 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:11:44,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:11:44,890 INFO L85 PathProgramCache]: Analyzing trace with hash -21008421, now seen corresponding path program 6 times [2024-06-20 16:11:44,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:11:44,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812308359] [2024-06-20 16:11:44,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:11:44,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:11:44,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:11:46,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:11:46,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:11:46,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812308359] [2024-06-20 16:11:46,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812308359] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:11:46,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:11:46,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:11:46,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30757823] [2024-06-20 16:11:46,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:11:46,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:11:46,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:11:46,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:11:46,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:11:46,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-20 16:11:46,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 614 transitions, 9752 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:11:46,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:11:46,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-20 16:11:46,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:11:49,497 INFO L124 PetriNetUnfolderBase]: 5120/7814 cut-off events. [2024-06-20 16:11:49,498 INFO L125 PetriNetUnfolderBase]: For 2381053/2381053 co-relation queries the response was YES. [2024-06-20 16:11:49,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107118 conditions, 7814 events. 5120/7814 cut-off events. For 2381053/2381053 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 45360 event pairs, 715 based on Foata normal form. 3/7815 useless extension candidates. Maximal degree in co-relation 106939. Up to 7018 conditions per place. [2024-06-20 16:11:49,648 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 523 selfloop transitions, 141 changer transitions 0/668 dead transitions. [2024-06-20 16:11:49,648 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 668 transitions, 12253 flow [2024-06-20 16:11:49,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-20 16:11:49,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-20 16:11:49,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 251 transitions. [2024-06-20 16:11:49,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4490161001788909 [2024-06-20 16:11:49,650 INFO L175 Difference]: Start difference. First operand has 394 places, 614 transitions, 9752 flow. Second operand 13 states and 251 transitions. [2024-06-20 16:11:49,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 668 transitions, 12253 flow [2024-06-20 16:11:56,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 668 transitions, 11872 flow, removed 175 selfloop flow, removed 3 redundant places. [2024-06-20 16:11:56,731 INFO L231 Difference]: Finished difference. Result has 405 places, 619 transitions, 10009 flow [2024-06-20 16:11:56,731 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9373, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=614, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=473, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=10009, PETRI_PLACES=405, PETRI_TRANSITIONS=619} [2024-06-20 16:11:56,731 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 361 predicate places. [2024-06-20 16:11:56,732 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 619 transitions, 10009 flow [2024-06-20 16:11:56,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:11:56,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:11:56,732 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:11:56,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-20 16:11:56,732 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:11:56,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:11:56,733 INFO L85 PathProgramCache]: Analyzing trace with hash -21238813, now seen corresponding path program 9 times [2024-06-20 16:11:56,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:11:56,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425095173] [2024-06-20 16:11:56,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:11:56,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:11:56,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:11:57,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:11:57,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:11:57,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425095173] [2024-06-20 16:11:57,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425095173] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:11:57,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:11:57,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:11:57,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906880299] [2024-06-20 16:11:57,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:11:57,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:11:57,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:11:57,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:11:57,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:11:58,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-20 16:11:58,104 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 619 transitions, 10009 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:11:58,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:11:58,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-20 16:11:58,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:12:00,841 INFO L124 PetriNetUnfolderBase]: 5272/8061 cut-off events. [2024-06-20 16:12:00,841 INFO L125 PetriNetUnfolderBase]: For 2701795/2701795 co-relation queries the response was YES. [2024-06-20 16:12:00,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112280 conditions, 8061 events. 5272/8061 cut-off events. For 2701795/2701795 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 47154 event pairs, 731 based on Foata normal form. 36/8095 useless extension candidates. Maximal degree in co-relation 112098. Up to 7148 conditions per place. [2024-06-20 16:12:00,991 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 544 selfloop transitions, 122 changer transitions 0/670 dead transitions. [2024-06-20 16:12:00,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 670 transitions, 12750 flow [2024-06-20 16:12:00,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:12:00,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:12:00,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 220 transitions. [2024-06-20 16:12:00,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-20 16:12:00,993 INFO L175 Difference]: Start difference. First operand has 405 places, 619 transitions, 10009 flow. Second operand 11 states and 220 transitions. [2024-06-20 16:12:00,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 670 transitions, 12750 flow [2024-06-20 16:12:08,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 670 transitions, 12158 flow, removed 159 selfloop flow, removed 10 redundant places. [2024-06-20 16:12:08,542 INFO L231 Difference]: Finished difference. Result has 406 places, 624 transitions, 10155 flow [2024-06-20 16:12:08,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9417, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=619, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=497, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10155, PETRI_PLACES=406, PETRI_TRANSITIONS=624} [2024-06-20 16:12:08,543 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 362 predicate places. [2024-06-20 16:12:08,543 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 624 transitions, 10155 flow [2024-06-20 16:12:08,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:12:08,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:12:08,543 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:12:08,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-20 16:12:08,544 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:12:08,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:12:08,544 INFO L85 PathProgramCache]: Analyzing trace with hash 208977107, now seen corresponding path program 10 times [2024-06-20 16:12:08,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:12:08,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217915988] [2024-06-20 16:12:08,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:12:08,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:12:08,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:12:09,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:12:09,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:12:09,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217915988] [2024-06-20 16:12:09,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217915988] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:12:09,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:12:09,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:12:09,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963207405] [2024-06-20 16:12:09,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:12:09,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:12:09,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:12:09,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:12:09,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:12:09,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-20 16:12:09,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 624 transitions, 10155 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:12:09,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:12:09,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-20 16:12:09,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:12:12,580 INFO L124 PetriNetUnfolderBase]: 5338/8163 cut-off events. [2024-06-20 16:12:12,580 INFO L125 PetriNetUnfolderBase]: For 2626571/2626571 co-relation queries the response was YES. [2024-06-20 16:12:12,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115044 conditions, 8163 events. 5338/8163 cut-off events. For 2626571/2626571 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 47843 event pairs, 721 based on Foata normal form. 6/8167 useless extension candidates. Maximal degree in co-relation 114861. Up to 5583 conditions per place. [2024-06-20 16:12:12,713 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 414 selfloop transitions, 261 changer transitions 0/679 dead transitions. [2024-06-20 16:12:12,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 679 transitions, 13223 flow [2024-06-20 16:12:12,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:12:12,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:12:12,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 222 transitions. [2024-06-20 16:12:12,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4693446088794926 [2024-06-20 16:12:12,715 INFO L175 Difference]: Start difference. First operand has 406 places, 624 transitions, 10155 flow. Second operand 11 states and 222 transitions. [2024-06-20 16:12:12,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 679 transitions, 13223 flow [2024-06-20 16:12:21,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 679 transitions, 12742 flow, removed 123 selfloop flow, removed 9 redundant places. [2024-06-20 16:12:21,632 INFO L231 Difference]: Finished difference. Result has 408 places, 630 transitions, 10774 flow [2024-06-20 16:12:21,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9674, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=624, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=258, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10774, PETRI_PLACES=408, PETRI_TRANSITIONS=630} [2024-06-20 16:12:21,633 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 364 predicate places. [2024-06-20 16:12:21,633 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 630 transitions, 10774 flow [2024-06-20 16:12:21,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:12:21,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:12:21,633 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:12:21,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-20 16:12:21,633 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:12:21,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:12:21,634 INFO L85 PathProgramCache]: Analyzing trace with hash -21008173, now seen corresponding path program 11 times [2024-06-20 16:12:21,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:12:21,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228471288] [2024-06-20 16:12:21,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:12:21,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:12:21,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:12:22,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:12:22,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:12:22,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228471288] [2024-06-20 16:12:22,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228471288] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:12:22,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:12:22,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:12:22,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415576182] [2024-06-20 16:12:22,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:12:22,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:12:22,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:12:22,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:12:22,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:12:23,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-20 16:12:23,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 630 transitions, 10774 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:12:23,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:12:23,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-20 16:12:23,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:12:25,764 INFO L124 PetriNetUnfolderBase]: 5328/8154 cut-off events. [2024-06-20 16:12:25,764 INFO L125 PetriNetUnfolderBase]: For 2561689/2561689 co-relation queries the response was YES. [2024-06-20 16:12:25,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114048 conditions, 8154 events. 5328/8154 cut-off events. For 2561689/2561689 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 47961 event pairs, 741 based on Foata normal form. 6/8158 useless extension candidates. Maximal degree in co-relation 113864. Up to 7158 conditions per place. [2024-06-20 16:12:25,897 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 535 selfloop transitions, 141 changer transitions 0/680 dead transitions. [2024-06-20 16:12:25,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 680 transitions, 13086 flow [2024-06-20 16:12:25,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 16:12:25,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 16:12:25,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 239 transitions. [2024-06-20 16:12:25,898 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4631782945736434 [2024-06-20 16:12:25,898 INFO L175 Difference]: Start difference. First operand has 408 places, 630 transitions, 10774 flow. Second operand 12 states and 239 transitions. [2024-06-20 16:12:25,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 680 transitions, 13086 flow [2024-06-20 16:12:33,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 680 transitions, 12139 flow, removed 335 selfloop flow, removed 7 redundant places. [2024-06-20 16:12:33,031 INFO L231 Difference]: Finished difference. Result has 413 places, 630 transitions, 10126 flow [2024-06-20 16:12:33,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9827, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=630, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=489, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=10126, PETRI_PLACES=413, PETRI_TRANSITIONS=630} [2024-06-20 16:12:33,031 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 369 predicate places. [2024-06-20 16:12:33,031 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 630 transitions, 10126 flow [2024-06-20 16:12:33,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:12:33,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:12:33,032 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:12:33,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-20 16:12:33,032 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:12:33,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:12:33,032 INFO L85 PathProgramCache]: Analyzing trace with hash 208688807, now seen corresponding path program 12 times [2024-06-20 16:12:33,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:12:33,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136647994] [2024-06-20 16:12:33,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:12:33,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:12:33,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:12:34,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:12:34,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:12:34,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136647994] [2024-06-20 16:12:34,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136647994] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:12:34,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:12:34,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:12:34,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549784601] [2024-06-20 16:12:34,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:12:34,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:12:34,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:12:34,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:12:34,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:12:34,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-20 16:12:34,370 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 630 transitions, 10126 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:12:34,370 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:12:34,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-20 16:12:34,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:12:37,227 INFO L124 PetriNetUnfolderBase]: 5356/8198 cut-off events. [2024-06-20 16:12:37,228 INFO L125 PetriNetUnfolderBase]: For 2568137/2568137 co-relation queries the response was YES. [2024-06-20 16:12:37,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113277 conditions, 8198 events. 5356/8198 cut-off events. For 2568137/2568137 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 48270 event pairs, 734 based on Foata normal form. 6/8202 useless extension candidates. Maximal degree in co-relation 113091. Up to 7398 conditions per place. [2024-06-20 16:12:37,368 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 512 selfloop transitions, 161 changer transitions 0/677 dead transitions. [2024-06-20 16:12:37,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 423 places, 677 transitions, 12814 flow [2024-06-20 16:12:37,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:12:37,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:12:37,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 215 transitions. [2024-06-20 16:12:37,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-20 16:12:37,369 INFO L175 Difference]: Start difference. First operand has 413 places, 630 transitions, 10126 flow. Second operand 11 states and 215 transitions. [2024-06-20 16:12:37,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 423 places, 677 transitions, 12814 flow [2024-06-20 16:12:45,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 677 transitions, 12527 flow, removed 9 selfloop flow, removed 10 redundant places. [2024-06-20 16:12:45,860 INFO L231 Difference]: Finished difference. Result has 414 places, 633 transitions, 10451 flow [2024-06-20 16:12:45,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9839, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=630, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=472, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10451, PETRI_PLACES=414, PETRI_TRANSITIONS=633} [2024-06-20 16:12:45,860 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 370 predicate places. [2024-06-20 16:12:45,861 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 633 transitions, 10451 flow [2024-06-20 16:12:45,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:12:45,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:12:45,861 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:12:45,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-20 16:12:45,861 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:12:45,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:12:45,864 INFO L85 PathProgramCache]: Analyzing trace with hash 208680189, now seen corresponding path program 7 times [2024-06-20 16:12:45,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:12:45,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474884071] [2024-06-20 16:12:45,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:12:45,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:12:45,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:12:47,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:12:47,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:12:47,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474884071] [2024-06-20 16:12:47,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474884071] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:12:47,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:12:47,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:12:47,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561861307] [2024-06-20 16:12:47,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:12:47,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:12:47,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:12:47,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:12:47,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:12:47,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-20 16:12:47,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 633 transitions, 10451 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:12:47,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:12:47,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-20 16:12:47,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:12:49,875 INFO L124 PetriNetUnfolderBase]: 5398/8264 cut-off events. [2024-06-20 16:12:49,875 INFO L125 PetriNetUnfolderBase]: For 2625707/2625707 co-relation queries the response was YES. [2024-06-20 16:12:49,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115531 conditions, 8264 events. 5398/8264 cut-off events. For 2625707/2625707 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 48753 event pairs, 750 based on Foata normal form. 3/8265 useless extension candidates. Maximal degree in co-relation 115344. Up to 7179 conditions per place. [2024-06-20 16:12:50,014 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 451 selfloop transitions, 228 changer transitions 0/683 dead transitions. [2024-06-20 16:12:50,014 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 683 transitions, 13529 flow [2024-06-20 16:12:50,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:12:50,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:12:50,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 216 transitions. [2024-06-20 16:12:50,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45665961945031713 [2024-06-20 16:12:50,015 INFO L175 Difference]: Start difference. First operand has 414 places, 633 transitions, 10451 flow. Second operand 11 states and 216 transitions. [2024-06-20 16:12:50,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 683 transitions, 13529 flow [2024-06-20 16:12:57,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 683 transitions, 12711 flow, removed 160 selfloop flow, removed 11 redundant places. [2024-06-20 16:12:57,283 INFO L231 Difference]: Finished difference. Result has 414 places, 641 transitions, 10762 flow [2024-06-20 16:12:57,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9633, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=633, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=224, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=409, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10762, PETRI_PLACES=414, PETRI_TRANSITIONS=641} [2024-06-20 16:12:57,284 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 370 predicate places. [2024-06-20 16:12:57,284 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 641 transitions, 10762 flow [2024-06-20 16:12:57,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:12:57,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:12:57,285 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:12:57,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-20 16:12:57,285 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:12:57,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:12:57,285 INFO L85 PathProgramCache]: Analyzing trace with hash 200405979, now seen corresponding path program 8 times [2024-06-20 16:12:57,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:12:57,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475155861] [2024-06-20 16:12:57,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:12:57,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:12:57,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:12:58,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:12:58,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:12:58,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475155861] [2024-06-20 16:12:58,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475155861] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:12:58,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:12:58,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:12:58,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063566177] [2024-06-20 16:12:58,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:12:58,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:12:58,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:12:58,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:12:58,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:12:58,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-20 16:12:58,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 641 transitions, 10762 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:12:58,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:12:58,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-20 16:12:58,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:13:01,390 INFO L124 PetriNetUnfolderBase]: 5416/8302 cut-off events. [2024-06-20 16:13:01,390 INFO L125 PetriNetUnfolderBase]: For 2651785/2651785 co-relation queries the response was YES. [2024-06-20 16:13:01,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115539 conditions, 8302 events. 5416/8302 cut-off events. For 2651785/2651785 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 49208 event pairs, 741 based on Foata normal form. 3/8303 useless extension candidates. Maximal degree in co-relation 115353. Up to 7492 conditions per place. [2024-06-20 16:13:01,679 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 520 selfloop transitions, 161 changer transitions 0/685 dead transitions. [2024-06-20 16:13:01,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 685 transitions, 13064 flow [2024-06-20 16:13:01,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:13:01,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:13:01,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 214 transitions. [2024-06-20 16:13:01,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.452431289640592 [2024-06-20 16:13:01,680 INFO L175 Difference]: Start difference. First operand has 414 places, 641 transitions, 10762 flow. Second operand 11 states and 214 transitions. [2024-06-20 16:13:01,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 685 transitions, 13064 flow [2024-06-20 16:13:09,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 685 transitions, 12512 flow, removed 182 selfloop flow, removed 7 redundant places. [2024-06-20 16:13:09,902 INFO L231 Difference]: Finished difference. Result has 418 places, 645 transitions, 10885 flow [2024-06-20 16:13:09,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10232, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=641, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=480, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10885, PETRI_PLACES=418, PETRI_TRANSITIONS=645} [2024-06-20 16:13:09,903 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 374 predicate places. [2024-06-20 16:13:09,903 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 645 transitions, 10885 flow [2024-06-20 16:13:09,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:13:09,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:13:09,904 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:13:09,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-20 16:13:09,906 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:13:09,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:13:09,906 INFO L85 PathProgramCache]: Analyzing trace with hash 208680437, now seen corresponding path program 13 times [2024-06-20 16:13:09,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:13:09,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473588739] [2024-06-20 16:13:09,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:13:09,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:13:09,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:13:11,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:13:11,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:13:11,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473588739] [2024-06-20 16:13:11,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473588739] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:13:11,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:13:11,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:13:11,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297062531] [2024-06-20 16:13:11,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:13:11,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:13:11,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:13:11,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:13:11,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:13:11,213 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-20 16:13:11,213 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 645 transitions, 10885 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:13:11,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:13:11,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-20 16:13:11,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:13:13,881 INFO L124 PetriNetUnfolderBase]: 5406/8293 cut-off events. [2024-06-20 16:13:13,882 INFO L125 PetriNetUnfolderBase]: For 2657795/2657795 co-relation queries the response was YES. [2024-06-20 16:13:13,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114749 conditions, 8293 events. 5406/8293 cut-off events. For 2657795/2657795 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 49187 event pairs, 739 based on Foata normal form. 6/8297 useless extension candidates. Maximal degree in co-relation 114561. Up to 7071 conditions per place. [2024-06-20 16:13:14,022 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 476 selfloop transitions, 218 changer transitions 0/698 dead transitions. [2024-06-20 16:13:14,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 698 transitions, 13015 flow [2024-06-20 16:13:14,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-20 16:13:14,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-20 16:13:14,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 254 transitions. [2024-06-20 16:13:14,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4543828264758497 [2024-06-20 16:13:14,024 INFO L175 Difference]: Start difference. First operand has 418 places, 645 transitions, 10885 flow. Second operand 13 states and 254 transitions. [2024-06-20 16:13:14,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 698 transitions, 13015 flow [2024-06-20 16:13:21,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 698 transitions, 12182 flow, removed 258 selfloop flow, removed 9 redundant places. [2024-06-20 16:13:21,963 INFO L231 Difference]: Finished difference. Result has 422 places, 645 transitions, 10504 flow [2024-06-20 16:13:21,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10052, PETRI_DIFFERENCE_MINUEND_PLACES=409, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=645, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=218, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=10504, PETRI_PLACES=422, PETRI_TRANSITIONS=645} [2024-06-20 16:13:21,963 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 378 predicate places. [2024-06-20 16:13:21,963 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 645 transitions, 10504 flow [2024-06-20 16:13:21,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:13:21,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:13:21,964 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:13:21,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-20 16:13:21,964 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:13:21,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:13:21,964 INFO L85 PathProgramCache]: Analyzing trace with hash 200636619, now seen corresponding path program 9 times [2024-06-20 16:13:21,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:13:21,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898019145] [2024-06-20 16:13:21,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:13:21,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:13:21,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:13:23,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:13:23,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:13:23,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898019145] [2024-06-20 16:13:23,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898019145] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:13:23,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:13:23,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:13:23,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44935283] [2024-06-20 16:13:23,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:13:23,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:13:23,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:13:23,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:13:23,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:13:23,536 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-20 16:13:23,536 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 645 transitions, 10504 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:13:23,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:13:23,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-20 16:13:23,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:13:26,210 INFO L124 PetriNetUnfolderBase]: 5400/8287 cut-off events. [2024-06-20 16:13:26,210 INFO L125 PetriNetUnfolderBase]: For 2629858/2629858 co-relation queries the response was YES. [2024-06-20 16:13:26,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113792 conditions, 8287 events. 5400/8287 cut-off events. For 2629858/2629858 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 49171 event pairs, 739 based on Foata normal form. 3/8288 useless extension candidates. Maximal degree in co-relation 113603. Up to 7496 conditions per place. [2024-06-20 16:13:26,529 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 534 selfloop transitions, 155 changer transitions 0/693 dead transitions. [2024-06-20 16:13:26,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 693 transitions, 12514 flow [2024-06-20 16:13:26,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-20 16:13:26,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-20 16:13:26,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 246 transitions. [2024-06-20 16:13:26,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4400715563506261 [2024-06-20 16:13:26,530 INFO L175 Difference]: Start difference. First operand has 422 places, 645 transitions, 10504 flow. Second operand 13 states and 246 transitions. [2024-06-20 16:13:26,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 693 transitions, 12514 flow [2024-06-20 16:13:34,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 693 transitions, 11900 flow, removed 91 selfloop flow, removed 12 redundant places. [2024-06-20 16:13:34,580 INFO L231 Difference]: Finished difference. Result has 423 places, 645 transitions, 10218 flow [2024-06-20 16:13:34,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9894, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=645, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=490, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=10218, PETRI_PLACES=423, PETRI_TRANSITIONS=645} [2024-06-20 16:13:34,581 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 379 predicate places. [2024-06-20 16:13:34,581 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 645 transitions, 10218 flow [2024-06-20 16:13:34,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:13:34,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:13:34,581 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:13:34,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-20 16:13:34,582 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:13:34,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:13:34,582 INFO L85 PathProgramCache]: Analyzing trace with hash 2082143625, now seen corresponding path program 3 times [2024-06-20 16:13:34,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:13:34,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599361912] [2024-06-20 16:13:34,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:13:34,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:13:34,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:13:35,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:13:35,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:13:35,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599361912] [2024-06-20 16:13:35,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599361912] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:13:35,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:13:35,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:13:35,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069575272] [2024-06-20 16:13:35,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:13:35,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:13:35,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:13:35,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:13:35,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:13:35,517 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-20 16:13:35,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 645 transitions, 10218 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:13:35,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:13:35,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-20 16:13:35,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:13:38,281 INFO L124 PetriNetUnfolderBase]: 5410/8302 cut-off events. [2024-06-20 16:13:38,281 INFO L125 PetriNetUnfolderBase]: For 2618022/2618022 co-relation queries the response was YES. [2024-06-20 16:13:38,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113322 conditions, 8302 events. 5410/8302 cut-off events. For 2618022/2618022 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 49231 event pairs, 744 based on Foata normal form. 2/8302 useless extension candidates. Maximal degree in co-relation 113133. Up to 8016 conditions per place. [2024-06-20 16:13:38,427 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 618 selfloop transitions, 48 changer transitions 0/670 dead transitions. [2024-06-20 16:13:38,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 670 transitions, 12020 flow [2024-06-20 16:13:38,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:13:38,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:13:38,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-20 16:13:38,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-20 16:13:38,428 INFO L175 Difference]: Start difference. First operand has 423 places, 645 transitions, 10218 flow. Second operand 8 states and 144 transitions. [2024-06-20 16:13:38,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 670 transitions, 12020 flow [2024-06-20 16:13:45,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 419 places, 670 transitions, 11462 flow, removed 72 selfloop flow, removed 11 redundant places. [2024-06-20 16:13:45,058 INFO L231 Difference]: Finished difference. Result has 420 places, 650 transitions, 9900 flow [2024-06-20 16:13:45,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9670, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=645, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=602, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9900, PETRI_PLACES=420, PETRI_TRANSITIONS=650} [2024-06-20 16:13:45,058 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 376 predicate places. [2024-06-20 16:13:45,058 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 650 transitions, 9900 flow [2024-06-20 16:13:45,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:13:45,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:13:45,059 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:13:45,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-20 16:13:45,059 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:13:45,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:13:45,059 INFO L85 PathProgramCache]: Analyzing trace with hash 2082157048, now seen corresponding path program 2 times [2024-06-20 16:13:45,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:13:45,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012228935] [2024-06-20 16:13:45,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:13:45,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:13:45,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:13:45,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:13:45,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:13:45,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012228935] [2024-06-20 16:13:45,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012228935] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:13:45,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:13:45,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:13:45,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660440917] [2024-06-20 16:13:45,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:13:45,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:13:45,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:13:45,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:13:45,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:13:45,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-20 16:13:45,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 650 transitions, 9900 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:13:45,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:13:45,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-20 16:13:45,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:13:48,654 INFO L124 PetriNetUnfolderBase]: 5423/8315 cut-off events. [2024-06-20 16:13:48,654 INFO L125 PetriNetUnfolderBase]: For 2610763/2610763 co-relation queries the response was YES. [2024-06-20 16:13:48,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112592 conditions, 8315 events. 5423/8315 cut-off events. For 2610763/2610763 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 49274 event pairs, 745 based on Foata normal form. 1/8314 useless extension candidates. Maximal degree in co-relation 112402. Up to 8063 conditions per place. [2024-06-20 16:13:48,803 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 627 selfloop transitions, 44 changer transitions 0/675 dead transitions. [2024-06-20 16:13:48,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 675 transitions, 11904 flow [2024-06-20 16:13:48,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:13:48,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:13:48,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-20 16:13:48,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41569767441860467 [2024-06-20 16:13:48,805 INFO L175 Difference]: Start difference. First operand has 420 places, 650 transitions, 9900 flow. Second operand 8 states and 143 transitions. [2024-06-20 16:13:48,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 675 transitions, 11904 flow [2024-06-20 16:13:57,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 675 transitions, 11764 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-20 16:13:57,987 INFO L231 Difference]: Finished difference. Result has 423 places, 656 transitions, 9958 flow [2024-06-20 16:13:57,988 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9760, PETRI_DIFFERENCE_MINUEND_PLACES=415, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=650, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=612, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9958, PETRI_PLACES=423, PETRI_TRANSITIONS=656} [2024-06-20 16:13:57,988 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 379 predicate places. [2024-06-20 16:13:57,988 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 656 transitions, 9958 flow [2024-06-20 16:13:57,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:13:57,988 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:13:57,988 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:13:57,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-20 16:13:57,989 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:13:57,989 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:13:57,989 INFO L85 PathProgramCache]: Analyzing trace with hash -271656113, now seen corresponding path program 1 times [2024-06-20 16:13:57,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:13:57,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927168629] [2024-06-20 16:13:57,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:13:57,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:13:57,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:13:58,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:13:58,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:13:58,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927168629] [2024-06-20 16:13:58,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927168629] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:13:58,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:13:58,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:13:58,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710052413] [2024-06-20 16:13:58,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:13:58,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:13:58,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:13:58,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:13:58,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:13:58,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-20 16:13:58,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 656 transitions, 9958 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:13:58,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:13:58,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-20 16:13:58,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:14:01,390 INFO L124 PetriNetUnfolderBase]: 5172/8036 cut-off events. [2024-06-20 16:14:01,390 INFO L125 PetriNetUnfolderBase]: For 2649503/2649503 co-relation queries the response was YES. [2024-06-20 16:14:01,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111081 conditions, 8036 events. 5172/8036 cut-off events. For 2649503/2649503 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 48495 event pairs, 705 based on Foata normal form. 2/7984 useless extension candidates. Maximal degree in co-relation 110890. Up to 7461 conditions per place. [2024-06-20 16:14:01,525 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 603 selfloop transitions, 34 changer transitions 0/682 dead transitions. [2024-06-20 16:14:01,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 682 transitions, 11654 flow [2024-06-20 16:14:01,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:14:01,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:14:01,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-20 16:14:01,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.438953488372093 [2024-06-20 16:14:01,527 INFO L175 Difference]: Start difference. First operand has 423 places, 656 transitions, 9958 flow. Second operand 8 states and 151 transitions. [2024-06-20 16:14:01,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 682 transitions, 11654 flow