./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix018.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/mix018.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version bcb38a6f 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/mix018.opt.i ./goblint.2024-05-21_14-57-05.files/protection/mix018.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-bcb38a6-m [2024-06-04 14:51:31,272 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-04 14:51:31,344 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-04 14:51:31,352 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-04 14:51:31,353 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-04 14:51:31,376 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-04 14:51:31,378 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-04 14:51:31,378 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-04 14:51:31,379 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-04 14:51:31,382 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-04 14:51:31,382 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-04 14:51:31,383 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-04 14:51:31,384 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-04 14:51:31,384 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-04 14:51:31,385 INFO L153 SettingsManager]: * Use SBE=true [2024-06-04 14:51:31,385 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-04 14:51:31,385 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-04 14:51:31,385 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-04 14:51:31,386 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-04 14:51:31,386 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-04 14:51:31,386 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-04 14:51:31,386 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-04 14:51:31,387 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-04 14:51:31,387 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-04 14:51:31,387 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-04 14:51:31,387 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-04 14:51:31,387 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-04 14:51:31,388 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-04 14:51:31,388 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-04 14:51:31,388 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-04 14:51:31,389 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-04 14:51:31,389 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-04 14:51:31,389 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-04 14:51:31,390 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-04 14:51:31,390 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-04 14:51:31,390 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-04 14:51:31,390 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-04 14:51:31,390 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-04 14:51:31,391 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-04 14:51:31,391 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-04 14:51:31,391 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-04 14:51:31,391 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-04 14:51:31,391 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-04 14:51:31,392 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-04 14:51:31,588 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-04 14:51:31,606 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-04 14:51:31,609 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-04 14:51:31,610 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-04 14:51:31,611 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-04 14:51:31,612 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix018.opt.yml/witness.yml [2024-06-04 14:51:31,758 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-04 14:51:31,760 INFO L274 PluginConnector]: CDTParser initialized [2024-06-04 14:51:31,761 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix018.opt.i [2024-06-04 14:51:32,789 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-04 14:51:33,018 INFO L384 CDTParser]: Found 1 translation units. [2024-06-04 14:51:33,018 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix018.opt.i [2024-06-04 14:51:33,037 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b16179dba/2059a06736054667983739793ee12caf/FLAG50660dbed [2024-06-04 14:51:33,048 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b16179dba/2059a06736054667983739793ee12caf [2024-06-04 14:51:33,048 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-04 14:51:33,049 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-04 14:51:33,052 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-04 14:51:33,052 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-04 14:51:33,055 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-04 14:51:33,056 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 02:51:31" (1/2) ... [2024-06-04 14:51:33,056 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4bf74bf7 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:51:33, skipping insertion in model container [2024-06-04 14:51:33,057 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 02:51:31" (1/2) ... [2024-06-04 14:51:33,058 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@50e48a7a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:51:33, skipping insertion in model container [2024-06-04 14:51:33,058 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.06 02:51:33" (2/2) ... [2024-06-04 14:51:33,058 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4bf74bf7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:51:33, skipping insertion in model container [2024-06-04 14:51:33,059 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.06 02:51:33" (2/2) ... [2024-06-04 14:51:33,059 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-04 14:51:33,152 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-04 14:51:33,153 INFO L97 edCorrectnessWitness]: Location invariant before [L871-L871] ((((((((((((((((((((((! multithreaded || z$r_buff1_thd1 == (_Bool)0) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1)))) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) [2024-06-04 14:51:33,153 INFO L97 edCorrectnessWitness]: Location invariant before [L872-L872] ((((((((((((((((((((((! multithreaded || z$r_buff1_thd1 == (_Bool)0) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1)))) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) [2024-06-04 14:51:33,153 INFO L97 edCorrectnessWitness]: Location invariant before [L869-L869] ((((((((((((((((((((((! multithreaded || z$r_buff1_thd1 == (_Bool)0) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1)))) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) [2024-06-04 14:51:33,153 INFO L97 edCorrectnessWitness]: Location invariant before [L867-L867] ((((((((((((((((((((((! multithreaded || z$r_buff1_thd1 == (_Bool)0) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1)))) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) [2024-06-04 14:51:33,154 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-04 14:51:33,154 INFO L106 edCorrectnessWitness]: ghost_update [L865-L865] multithreaded = 1; [2024-06-04 14:51:33,189 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-04 14:51:33,529 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-04 14:51:33,539 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-04 14:51:33,686 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-04 14:51:33,723 INFO L206 MainTranslator]: Completed translation [2024-06-04 14:51:33,724 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:51:33 WrapperNode [2024-06-04 14:51:33,724 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-04 14:51:33,725 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-04 14:51:33,725 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-04 14:51:33,725 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-04 14:51:33,731 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:51:33" (1/1) ... [2024-06-04 14:51:33,756 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:51:33" (1/1) ... [2024-06-04 14:51:33,790 INFO L138 Inliner]: procedures = 176, calls = 54, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 161 [2024-06-04 14:51:33,790 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-04 14:51:33,792 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-04 14:51:33,792 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-04 14:51:33,792 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-04 14:51:33,800 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:51:33" (1/1) ... [2024-06-04 14:51:33,801 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:51:33" (1/1) ... [2024-06-04 14:51:33,815 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:51:33" (1/1) ... [2024-06-04 14:51:33,842 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]. [2024-06-04 14:51:33,842 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:51:33" (1/1) ... [2024-06-04 14:51:33,842 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:51:33" (1/1) ... [2024-06-04 14:51:33,853 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:51:33" (1/1) ... [2024-06-04 14:51:33,861 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:51:33" (1/1) ... [2024-06-04 14:51:33,863 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:51:33" (1/1) ... [2024-06-04 14:51:33,869 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:51:33" (1/1) ... [2024-06-04 14:51:33,873 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-04 14:51:33,876 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-04 14:51:33,876 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-04 14:51:33,876 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-04 14:51:33,877 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:51:33" (1/1) ... [2024-06-04 14:51:33,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-04 14:51:33,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-04 14:51:33,926 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) [2024-06-04 14:51:33,985 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 [2024-06-04 14:51:33,998 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-04 14:51:33,998 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-04 14:51:33,998 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-04 14:51:33,999 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-04 14:51:33,999 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-04 14:51:33,999 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-04 14:51:33,999 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-04 14:51:33,999 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-04 14:51:33,999 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-04 14:51:34,000 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-04 14:51:34,000 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-04 14:51:34,000 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-04 14:51:34,001 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-04 14:51:34,001 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-04 14:51:34,002 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-04 14:51:34,146 INFO L244 CfgBuilder]: Building ICFG [2024-06-04 14:51:34,148 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-04 14:51:34,537 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-04 14:51:34,537 INFO L293 CfgBuilder]: Performing block encoding [2024-06-04 14:51:34,722 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-04 14:51:34,722 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-04 14:51:34,723 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.06 02:51:34 BoogieIcfgContainer [2024-06-04 14:51:34,723 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-04 14:51:34,727 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-04 14:51:34,728 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-04 14:51:34,730 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-04 14:51:34,731 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 02:51:31" (1/4) ... [2024-06-04 14:51:34,731 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b1a812 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 04.06 02:51:34, skipping insertion in model container [2024-06-04 14:51:34,731 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.06 02:51:33" (2/4) ... [2024-06-04 14:51:34,732 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b1a812 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.06 02:51:34, skipping insertion in model container [2024-06-04 14:51:34,732 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:51:33" (3/4) ... [2024-06-04 14:51:34,732 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b1a812 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.06 02:51:34, skipping insertion in model container [2024-06-04 14:51:34,732 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.06 02:51:34" (4/4) ... [2024-06-04 14:51:34,733 INFO L112 eAbstractionObserver]: Analyzing ICFG mix018.opt.i [2024-06-04 14:51:34,747 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-04 14:51:34,748 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-04 14:51:34,748 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-04 14:51:34,790 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-04 14:51:34,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 66 places, 53 transitions, 122 flow [2024-06-04 14:51:34,847 INFO L124 PetriNetUnfolderBase]: 0/49 cut-off events. [2024-06-04 14:51:34,847 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-04 14:51:34,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 49 events. 0/49 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 80 event pairs, 0 based on Foata normal form. 0/45 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-04 14:51:34,850 INFO L82 GeneralOperation]: Start removeDead. Operand has 66 places, 53 transitions, 122 flow [2024-06-04 14:51:34,852 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 56 places, 43 transitions, 98 flow [2024-06-04 14:51:34,858 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-04 14:51:34,863 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;@554159bc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-04 14:51:34,863 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-04 14:51:34,866 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-04 14:51:34,866 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-04 14:51:34,866 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-04 14:51:34,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:51:34,867 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-04 14:51:34,867 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:51:34,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:51:34,871 INFO L85 PathProgramCache]: Analyzing trace with hash -13335953, now seen corresponding path program 1 times [2024-06-04 14:51:34,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:51:34,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703808767] [2024-06-04 14:51:34,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:51:34,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:51:35,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:51:35,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:51:35,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:51:35,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703808767] [2024-06-04 14:51:35,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703808767] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:51:35,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:51:35,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-04 14:51:35,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163457162] [2024-06-04 14:51:35,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:51:35,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-04 14:51:35,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:51:35,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-04 14:51:35,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-04 14:51:35,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 53 [2024-06-04 14:51:35,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 43 transitions, 98 flow. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:51:35,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:51:35,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 53 [2024-06-04 14:51:35,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:51:37,071 INFO L124 PetriNetUnfolderBase]: 6201/8839 cut-off events. [2024-06-04 14:51:37,071 INFO L125 PetriNetUnfolderBase]: For 122/122 co-relation queries the response was YES. [2024-06-04 14:51:37,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17597 conditions, 8839 events. 6201/8839 cut-off events. For 122/122 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 50262 event pairs, 4673 based on Foata normal form. 1/8554 useless extension candidates. Maximal degree in co-relation 17581. Up to 8487 conditions per place. [2024-06-04 14:51:37,126 INFO L140 encePairwiseOnDemand]: 44/53 looper letters, 43 selfloop transitions, 5 changer transitions 0/57 dead transitions. [2024-06-04 14:51:37,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 57 transitions, 231 flow [2024-06-04 14:51:37,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-04 14:51:37,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-04 14:51:37,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 100 transitions. [2024-06-04 14:51:37,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6289308176100629 [2024-06-04 14:51:37,137 INFO L175 Difference]: Start difference. First operand has 56 places, 43 transitions, 98 flow. Second operand 3 states and 100 transitions. [2024-06-04 14:51:37,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 57 transitions, 231 flow [2024-06-04 14:51:37,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 57 transitions, 224 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-04 14:51:37,141 INFO L231 Difference]: Finished difference. Result has 55 places, 47 transitions, 133 flow [2024-06-04 14:51:37,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=133, PETRI_PLACES=55, PETRI_TRANSITIONS=47} [2024-06-04 14:51:37,145 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -1 predicate places. [2024-06-04 14:51:37,146 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 47 transitions, 133 flow [2024-06-04 14:51:37,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:51:37,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:51:37,146 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:51:37,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-04 14:51:37,147 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:51:37,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:51:37,147 INFO L85 PathProgramCache]: Analyzing trace with hash 69080206, now seen corresponding path program 1 times [2024-06-04 14:51:37,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:51:37,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109036405] [2024-06-04 14:51:37,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:51:37,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:51:37,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:51:37,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:51:37,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:51:37,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109036405] [2024-06-04 14:51:37,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109036405] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:51:37,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:51:37,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-04 14:51:37,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181286641] [2024-06-04 14:51:37,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:51:37,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-04 14:51:37,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:51:37,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-04 14:51:37,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-04 14:51:37,958 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-04 14:51:37,958 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 47 transitions, 133 flow. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:51:37,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:51:37,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-04 14:51:37,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:51:39,044 INFO L124 PetriNetUnfolderBase]: 7096/9886 cut-off events. [2024-06-04 14:51:39,045 INFO L125 PetriNetUnfolderBase]: For 2057/2057 co-relation queries the response was YES. [2024-06-04 14:51:39,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22626 conditions, 9886 events. 7096/9886 cut-off events. For 2057/2057 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 54603 event pairs, 4749 based on Foata normal form. 4/9852 useless extension candidates. Maximal degree in co-relation 22611. Up to 9657 conditions per place. [2024-06-04 14:51:39,098 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 54 selfloop transitions, 9 changer transitions 0/71 dead transitions. [2024-06-04 14:51:39,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 71 transitions, 325 flow [2024-06-04 14:51:39,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-04 14:51:39,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-04 14:51:39,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 127 transitions. [2024-06-04 14:51:39,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5990566037735849 [2024-06-04 14:51:39,103 INFO L175 Difference]: Start difference. First operand has 55 places, 47 transitions, 133 flow. Second operand 4 states and 127 transitions. [2024-06-04 14:51:39,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 71 transitions, 325 flow [2024-06-04 14:51:39,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 71 transitions, 320 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-04 14:51:39,107 INFO L231 Difference]: Finished difference. Result has 58 places, 51 transitions, 181 flow [2024-06-04 14:51:39,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=181, PETRI_PLACES=58, PETRI_TRANSITIONS=51} [2024-06-04 14:51:39,109 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 2 predicate places. [2024-06-04 14:51:39,109 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 51 transitions, 181 flow [2024-06-04 14:51:39,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:51:39,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:51:39,112 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:51:39,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-04 14:51:39,112 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:51:39,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:51:39,118 INFO L85 PathProgramCache]: Analyzing trace with hash 2141487358, now seen corresponding path program 1 times [2024-06-04 14:51:39,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:51:39,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807510706] [2024-06-04 14:51:39,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:51:39,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:51:39,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:51:39,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:51:39,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:51:39,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807510706] [2024-06-04 14:51:39,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807510706] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:51:39,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:51:39,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-04 14:51:39,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213125052] [2024-06-04 14:51:39,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:51:39,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-04 14:51:39,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:51:39,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-04 14:51:39,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-04 14:51:39,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-04 14:51:39,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 51 transitions, 181 flow. Second operand has 5 states, 5 states have (on average 16.6) internal successors, (83), 5 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) [2024-06-04 14:51:39,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:51:39,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-04 14:51:39,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:51:40,807 INFO L124 PetriNetUnfolderBase]: 7114/9928 cut-off events. [2024-06-04 14:51:40,807 INFO L125 PetriNetUnfolderBase]: For 5889/5889 co-relation queries the response was YES. [2024-06-04 14:51:40,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25476 conditions, 9928 events. 7114/9928 cut-off events. For 5889/5889 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 54885 event pairs, 3563 based on Foata normal form. 7/9910 useless extension candidates. Maximal degree in co-relation 25459. Up to 9578 conditions per place. [2024-06-04 14:51:40,852 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 72 selfloop transitions, 21 changer transitions 0/101 dead transitions. [2024-06-04 14:51:40,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 101 transitions, 541 flow [2024-06-04 14:51:40,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 14:51:40,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 14:51:40,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 166 transitions. [2024-06-04 14:51:40,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6264150943396226 [2024-06-04 14:51:40,854 INFO L175 Difference]: Start difference. First operand has 58 places, 51 transitions, 181 flow. Second operand 5 states and 166 transitions. [2024-06-04 14:51:40,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 101 transitions, 541 flow [2024-06-04 14:51:40,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 101 transitions, 522 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-04 14:51:40,857 INFO L231 Difference]: Finished difference. Result has 63 places, 65 transitions, 312 flow [2024-06-04 14:51:40,857 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=312, PETRI_PLACES=63, PETRI_TRANSITIONS=65} [2024-06-04 14:51:40,858 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 7 predicate places. [2024-06-04 14:51:40,858 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 65 transitions, 312 flow [2024-06-04 14:51:40,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 5 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) [2024-06-04 14:51:40,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:51:40,859 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:51:40,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-04 14:51:40,859 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:51:40,859 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:51:40,859 INFO L85 PathProgramCache]: Analyzing trace with hash 680048381, now seen corresponding path program 1 times [2024-06-04 14:51:40,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:51:40,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519079686] [2024-06-04 14:51:40,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:51:40,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:51:40,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:51:41,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:51:41,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:51:41,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519079686] [2024-06-04 14:51:41,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519079686] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:51:41,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:51:41,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:51:41,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322773908] [2024-06-04 14:51:41,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:51:41,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:51:41,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:51:41,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:51:41,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:51:41,756 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-04 14:51:41,756 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 65 transitions, 312 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 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) [2024-06-04 14:51:41,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:51:41,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-04 14:51:41,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:51:42,934 INFO L124 PetriNetUnfolderBase]: 7256/10148 cut-off events. [2024-06-04 14:51:42,934 INFO L125 PetriNetUnfolderBase]: For 14372/14391 co-relation queries the response was YES. [2024-06-04 14:51:42,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30760 conditions, 10148 events. 7256/10148 cut-off events. For 14372/14391 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 56522 event pairs, 2792 based on Foata normal form. 48/10169 useless extension candidates. Maximal degree in co-relation 30740. Up to 9570 conditions per place. [2024-06-04 14:51:42,986 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 82 selfloop transitions, 24 changer transitions 0/114 dead transitions. [2024-06-04 14:51:42,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 114 transitions, 696 flow [2024-06-04 14:51:42,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:51:42,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:51:42,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 194 transitions. [2024-06-04 14:51:42,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.610062893081761 [2024-06-04 14:51:42,988 INFO L175 Difference]: Start difference. First operand has 63 places, 65 transitions, 312 flow. Second operand 6 states and 194 transitions. [2024-06-04 14:51:42,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 114 transitions, 696 flow [2024-06-04 14:51:42,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 114 transitions, 684 flow, removed 6 selfloop flow, removed 0 redundant places. [2024-06-04 14:51:42,997 INFO L231 Difference]: Finished difference. Result has 68 places, 67 transitions, 381 flow [2024-06-04 14:51:42,997 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=292, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=381, PETRI_PLACES=68, PETRI_TRANSITIONS=67} [2024-06-04 14:51:42,997 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 12 predicate places. [2024-06-04 14:51:42,998 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 67 transitions, 381 flow [2024-06-04 14:51:42,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 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) [2024-06-04 14:51:42,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:51:42,998 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:51:42,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-04 14:51:42,998 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:51:42,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:51:42,999 INFO L85 PathProgramCache]: Analyzing trace with hash 279362288, now seen corresponding path program 1 times [2024-06-04 14:51:42,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:51:42,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644696043] [2024-06-04 14:51:42,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:51:43,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:51:43,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:51:43,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:51:43,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:51:43,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644696043] [2024-06-04 14:51:43,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644696043] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:51:43,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:51:43,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:51:43,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488402784] [2024-06-04 14:51:43,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:51:43,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:51:43,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:51:43,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:51:43,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:51:43,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-04 14:51:43,749 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 67 transitions, 381 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:51:43,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:51:43,749 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-04 14:51:43,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:51:44,856 INFO L124 PetriNetUnfolderBase]: 6342/9103 cut-off events. [2024-06-04 14:51:44,856 INFO L125 PetriNetUnfolderBase]: For 17897/17919 co-relation queries the response was YES. [2024-06-04 14:51:44,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29613 conditions, 9103 events. 6342/9103 cut-off events. For 17897/17919 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 52078 event pairs, 2937 based on Foata normal form. 3/8967 useless extension candidates. Maximal degree in co-relation 29590. Up to 8693 conditions per place. [2024-06-04 14:51:44,916 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 65 selfloop transitions, 10 changer transitions 0/84 dead transitions. [2024-06-04 14:51:44,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 84 transitions, 575 flow [2024-06-04 14:51:44,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 14:51:44,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 14:51:44,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 136 transitions. [2024-06-04 14:51:44,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5132075471698113 [2024-06-04 14:51:44,917 INFO L175 Difference]: Start difference. First operand has 68 places, 67 transitions, 381 flow. Second operand 5 states and 136 transitions. [2024-06-04 14:51:44,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 84 transitions, 575 flow [2024-06-04 14:51:44,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 84 transitions, 514 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-04 14:51:44,924 INFO L231 Difference]: Finished difference. Result has 69 places, 67 transitions, 351 flow [2024-06-04 14:51:44,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=320, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=351, PETRI_PLACES=69, PETRI_TRANSITIONS=67} [2024-06-04 14:51:44,925 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 13 predicate places. [2024-06-04 14:51:44,925 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 67 transitions, 351 flow [2024-06-04 14:51:44,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:51:44,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:51:44,926 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:51:44,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-04 14:51:44,926 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:51:44,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:51:44,926 INFO L85 PathProgramCache]: Analyzing trace with hash -1109658049, now seen corresponding path program 1 times [2024-06-04 14:51:44,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:51:44,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779448923] [2024-06-04 14:51:44,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:51:44,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:51:44,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:51:45,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:51:45,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:51:45,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779448923] [2024-06-04 14:51:45,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779448923] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:51:45,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:51:45,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:51:45,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980585739] [2024-06-04 14:51:45,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:51:45,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:51:45,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:51:45,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:51:45,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:51:45,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-04 14:51:45,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 67 transitions, 351 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:51:45,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:51:45,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-04 14:51:45,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:51:46,996 INFO L124 PetriNetUnfolderBase]: 7260/10150 cut-off events. [2024-06-04 14:51:46,997 INFO L125 PetriNetUnfolderBase]: For 24375/24395 co-relation queries the response was YES. [2024-06-04 14:51:47,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33606 conditions, 10150 events. 7260/10150 cut-off events. For 24375/24395 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 56474 event pairs, 3413 based on Foata normal form. 24/10153 useless extension candidates. Maximal degree in co-relation 33581. Up to 9800 conditions per place. [2024-06-04 14:51:47,056 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 68 selfloop transitions, 25 changer transitions 0/101 dead transitions. [2024-06-04 14:51:47,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 101 transitions, 674 flow [2024-06-04 14:51:47,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:51:47,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:51:47,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 167 transitions. [2024-06-04 14:51:47,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5251572327044025 [2024-06-04 14:51:47,057 INFO L175 Difference]: Start difference. First operand has 69 places, 67 transitions, 351 flow. Second operand 6 states and 167 transitions. [2024-06-04 14:51:47,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 101 transitions, 674 flow [2024-06-04 14:51:47,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 101 transitions, 645 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-04 14:51:47,066 INFO L231 Difference]: Finished difference. Result has 71 places, 71 transitions, 418 flow [2024-06-04 14:51:47,066 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=322, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=418, PETRI_PLACES=71, PETRI_TRANSITIONS=71} [2024-06-04 14:51:47,066 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 15 predicate places. [2024-06-04 14:51:47,067 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 71 transitions, 418 flow [2024-06-04 14:51:47,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:51:47,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:51:47,067 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:51:47,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-04 14:51:47,067 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:51:47,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:51:47,068 INFO L85 PathProgramCache]: Analyzing trace with hash -2115756529, now seen corresponding path program 2 times [2024-06-04 14:51:47,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:51:47,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893688684] [2024-06-04 14:51:47,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:51:47,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:51:47,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:51:47,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:51:47,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:51:47,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893688684] [2024-06-04 14:51:47,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893688684] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:51:47,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:51:47,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:51:47,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829784999] [2024-06-04 14:51:47,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:51:47,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:51:47,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:51:47,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:51:47,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:51:47,895 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-04 14:51:47,895 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 71 transitions, 418 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:51:47,895 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:51:47,896 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-04 14:51:47,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:51:49,270 INFO L124 PetriNetUnfolderBase]: 7215/10077 cut-off events. [2024-06-04 14:51:49,270 INFO L125 PetriNetUnfolderBase]: For 28954/28980 co-relation queries the response was YES. [2024-06-04 14:51:49,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34292 conditions, 10077 events. 7215/10077 cut-off events. For 28954/28980 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 55874 event pairs, 3427 based on Foata normal form. 24/10075 useless extension candidates. Maximal degree in co-relation 34267. Up to 9731 conditions per place. [2024-06-04 14:51:49,340 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 61 selfloop transitions, 26 changer transitions 0/95 dead transitions. [2024-06-04 14:51:49,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 95 transitions, 654 flow [2024-06-04 14:51:49,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:51:49,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:51:49,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 162 transitions. [2024-06-04 14:51:49,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5094339622641509 [2024-06-04 14:51:49,342 INFO L175 Difference]: Start difference. First operand has 71 places, 71 transitions, 418 flow. Second operand 6 states and 162 transitions. [2024-06-04 14:51:49,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 95 transitions, 654 flow [2024-06-04 14:51:49,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 95 transitions, 611 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-04 14:51:49,355 INFO L231 Difference]: Finished difference. Result has 74 places, 71 transitions, 438 flow [2024-06-04 14:51:49,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=375, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=438, PETRI_PLACES=74, PETRI_TRANSITIONS=71} [2024-06-04 14:51:49,356 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 18 predicate places. [2024-06-04 14:51:49,356 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 71 transitions, 438 flow [2024-06-04 14:51:49,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:51:49,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:51:49,356 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:51:49,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-04 14:51:49,356 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:51:49,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:51:49,357 INFO L85 PathProgramCache]: Analyzing trace with hash -2133392923, now seen corresponding path program 1 times [2024-06-04 14:51:49,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:51:49,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74489187] [2024-06-04 14:51:49,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:51:49,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:51:49,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:51:50,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:51:50,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:51:50,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74489187] [2024-06-04 14:51:50,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74489187] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:51:50,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:51:50,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:51:50,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879914663] [2024-06-04 14:51:50,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:51:50,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:51:50,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:51:50,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:51:50,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:51:50,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-04 14:51:50,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 71 transitions, 438 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 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) [2024-06-04 14:51:50,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:51:50,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-04 14:51:50,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:51:51,905 INFO L124 PetriNetUnfolderBase]: 8039/11436 cut-off events. [2024-06-04 14:51:51,905 INFO L125 PetriNetUnfolderBase]: For 36150/36150 co-relation queries the response was YES. [2024-06-04 14:51:51,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38662 conditions, 11436 events. 8039/11436 cut-off events. For 36150/36150 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 64378 event pairs, 3744 based on Foata normal form. 6/11276 useless extension candidates. Maximal degree in co-relation 38636. Up to 10907 conditions per place. [2024-06-04 14:51:51,970 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 85 selfloop transitions, 17 changer transitions 0/110 dead transitions. [2024-06-04 14:51:51,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 110 transitions, 779 flow [2024-06-04 14:51:51,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:51:51,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:51:51,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-04 14:51:51,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49056603773584906 [2024-06-04 14:51:51,972 INFO L175 Difference]: Start difference. First operand has 74 places, 71 transitions, 438 flow. Second operand 7 states and 182 transitions. [2024-06-04 14:51:51,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 110 transitions, 779 flow [2024-06-04 14:51:51,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 110 transitions, 688 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-04 14:51:51,994 INFO L231 Difference]: Finished difference. Result has 76 places, 78 transitions, 459 flow [2024-06-04 14:51:51,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=354, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=459, PETRI_PLACES=76, PETRI_TRANSITIONS=78} [2024-06-04 14:51:51,995 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 20 predicate places. [2024-06-04 14:51:51,995 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 78 transitions, 459 flow [2024-06-04 14:51:51,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 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) [2024-06-04 14:51:51,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:51:51,996 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:51:51,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-04 14:51:51,996 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:51:51,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:51:51,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1707952907, now seen corresponding path program 1 times [2024-06-04 14:51:51,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:51:51,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24624425] [2024-06-04 14:51:51,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:51:51,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:51:52,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:51:52,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:51:52,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:51:52,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24624425] [2024-06-04 14:51:52,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24624425] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:51:52,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:51:52,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:51:52,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013263693] [2024-06-04 14:51:52,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:51:52,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:51:52,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:51:52,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:51:52,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:51:52,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-04 14:51:52,737 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 78 transitions, 459 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:51:52,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:51:52,737 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-04 14:51:52,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:51:53,928 INFO L124 PetriNetUnfolderBase]: 8025/11546 cut-off events. [2024-06-04 14:51:53,929 INFO L125 PetriNetUnfolderBase]: For 44840/44840 co-relation queries the response was YES. [2024-06-04 14:51:53,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41243 conditions, 11546 events. 8025/11546 cut-off events. For 44840/44840 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 65926 event pairs, 3811 based on Foata normal form. 4/11532 useless extension candidates. Maximal degree in co-relation 41215. Up to 10931 conditions per place. [2024-06-04 14:51:53,987 INFO L140 encePairwiseOnDemand]: 44/53 looper letters, 79 selfloop transitions, 10 changer transitions 0/97 dead transitions. [2024-06-04 14:51:53,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 97 transitions, 707 flow [2024-06-04 14:51:53,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 14:51:53,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 14:51:53,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 129 transitions. [2024-06-04 14:51:53,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4867924528301887 [2024-06-04 14:51:53,990 INFO L175 Difference]: Start difference. First operand has 76 places, 78 transitions, 459 flow. Second operand 5 states and 129 transitions. [2024-06-04 14:51:53,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 97 transitions, 707 flow [2024-06-04 14:51:54,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 97 transitions, 659 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-04 14:51:54,009 INFO L231 Difference]: Finished difference. Result has 77 places, 82 transitions, 480 flow [2024-06-04 14:51:54,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=411, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=480, PETRI_PLACES=77, PETRI_TRANSITIONS=82} [2024-06-04 14:51:54,010 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 21 predicate places. [2024-06-04 14:51:54,010 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 82 transitions, 480 flow [2024-06-04 14:51:54,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:51:54,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:51:54,010 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:51:54,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-04 14:51:54,010 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:51:54,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:51:54,011 INFO L85 PathProgramCache]: Analyzing trace with hash 179240646, now seen corresponding path program 1 times [2024-06-04 14:51:54,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:51:54,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569651174] [2024-06-04 14:51:54,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:51:54,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:51:54,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:51:54,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:51:54,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:51:54,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569651174] [2024-06-04 14:51:54,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569651174] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:51:54,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:51:54,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:51:54,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354359577] [2024-06-04 14:51:54,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:51:54,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:51:54,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:51:54,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:51:54,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:51:55,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-04 14:51:55,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 82 transitions, 480 flow. Second operand has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:51:55,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:51:55,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-04 14:51:55,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:51:56,580 INFO L124 PetriNetUnfolderBase]: 9156/12791 cut-off events. [2024-06-04 14:51:56,580 INFO L125 PetriNetUnfolderBase]: For 69344/69376 co-relation queries the response was YES. [2024-06-04 14:51:56,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49743 conditions, 12791 events. 9156/12791 cut-off events. For 69344/69376 co-relation queries the response was YES. Maximal size of possible extension queue 512. Compared 72039 event pairs, 3617 based on Foata normal form. 34/12815 useless extension candidates. Maximal degree in co-relation 49714. Up to 11790 conditions per place. [2024-06-04 14:51:56,649 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 90 selfloop transitions, 32 changer transitions 0/131 dead transitions. [2024-06-04 14:51:56,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 131 transitions, 948 flow [2024-06-04 14:51:56,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:51:56,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:51:56,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 196 transitions. [2024-06-04 14:51:56,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5283018867924528 [2024-06-04 14:51:56,651 INFO L175 Difference]: Start difference. First operand has 77 places, 82 transitions, 480 flow. Second operand 7 states and 196 transitions. [2024-06-04 14:51:56,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 131 transitions, 948 flow [2024-06-04 14:51:56,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 131 transitions, 909 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-04 14:51:56,670 INFO L231 Difference]: Finished difference. Result has 81 places, 86 transitions, 570 flow [2024-06-04 14:51:56,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=441, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=570, PETRI_PLACES=81, PETRI_TRANSITIONS=86} [2024-06-04 14:51:56,671 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 25 predicate places. [2024-06-04 14:51:56,671 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 86 transitions, 570 flow [2024-06-04 14:51:56,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:51:56,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:51:56,671 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:51:56,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-04 14:51:56,672 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:51:56,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:51:56,672 INFO L85 PathProgramCache]: Analyzing trace with hash 179301096, now seen corresponding path program 2 times [2024-06-04 14:51:56,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:51:56,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844285588] [2024-06-04 14:51:56,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:51:56,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:51:56,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:51:57,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:51:57,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:51:57,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844285588] [2024-06-04 14:51:57,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844285588] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:51:57,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:51:57,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:51:57,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162229476] [2024-06-04 14:51:57,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:51:57,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:51:57,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:51:57,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:51:57,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:51:57,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-04 14:51:57,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 86 transitions, 570 flow. Second operand has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:51:57,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:51:57,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-04 14:51:57,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:51:59,350 INFO L124 PetriNetUnfolderBase]: 9349/13097 cut-off events. [2024-06-04 14:51:59,350 INFO L125 PetriNetUnfolderBase]: For 83910/83942 co-relation queries the response was YES. [2024-06-04 14:51:59,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52977 conditions, 13097 events. 9349/13097 cut-off events. For 83910/83942 co-relation queries the response was YES. Maximal size of possible extension queue 515. Compared 74177 event pairs, 3828 based on Foata normal form. 62/13149 useless extension candidates. Maximal degree in co-relation 52947. Up to 12444 conditions per place. [2024-06-04 14:51:59,430 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 87 selfloop transitions, 31 changer transitions 0/127 dead transitions. [2024-06-04 14:51:59,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 127 transitions, 942 flow [2024-06-04 14:51:59,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:51:59,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:51:59,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 192 transitions. [2024-06-04 14:51:59,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5175202156334232 [2024-06-04 14:51:59,447 INFO L175 Difference]: Start difference. First operand has 81 places, 86 transitions, 570 flow. Second operand 7 states and 192 transitions. [2024-06-04 14:51:59,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 127 transitions, 942 flow [2024-06-04 14:51:59,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 127 transitions, 895 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-04 14:51:59,505 INFO L231 Difference]: Finished difference. Result has 85 places, 89 transitions, 638 flow [2024-06-04 14:51:59,505 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=523, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=638, PETRI_PLACES=85, PETRI_TRANSITIONS=89} [2024-06-04 14:51:59,506 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 29 predicate places. [2024-06-04 14:51:59,509 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 89 transitions, 638 flow [2024-06-04 14:51:59,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:51:59,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:51:59,509 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:51:59,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-04 14:51:59,510 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:51:59,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:51:59,510 INFO L85 PathProgramCache]: Analyzing trace with hash -676627564, now seen corresponding path program 1 times [2024-06-04 14:51:59,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:51:59,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281197662] [2024-06-04 14:51:59,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:51:59,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:51:59,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:52:00,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:52:00,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:52:00,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281197662] [2024-06-04 14:52:00,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281197662] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:52:00,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:52:00,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:52:00,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199416167] [2024-06-04 14:52:00,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:52:00,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:52:00,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:52:00,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:52:00,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:52:00,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-04 14:52:00,304 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 89 transitions, 638 flow. Second operand has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 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) [2024-06-04 14:52:00,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:52:00,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-04 14:52:00,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:52:01,900 INFO L124 PetriNetUnfolderBase]: 9615/13441 cut-off events. [2024-06-04 14:52:01,901 INFO L125 PetriNetUnfolderBase]: For 95754/95754 co-relation queries the response was YES. [2024-06-04 14:52:01,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56108 conditions, 13441 events. 9615/13441 cut-off events. For 95754/95754 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 74133 event pairs, 4323 based on Foata normal form. 4/13439 useless extension candidates. Maximal degree in co-relation 56076. Up to 13042 conditions per place. [2024-06-04 14:52:01,991 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 98 selfloop transitions, 21 changer transitions 0/126 dead transitions. [2024-06-04 14:52:01,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 126 transitions, 1072 flow [2024-06-04 14:52:01,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:52:01,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:52:01,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 158 transitions. [2024-06-04 14:52:01,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4968553459119497 [2024-06-04 14:52:01,993 INFO L175 Difference]: Start difference. First operand has 85 places, 89 transitions, 638 flow. Second operand 6 states and 158 transitions. [2024-06-04 14:52:01,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 126 transitions, 1072 flow [2024-06-04 14:52:02,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 126 transitions, 993 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-04 14:52:02,076 INFO L231 Difference]: Finished difference. Result has 86 places, 97 transitions, 698 flow [2024-06-04 14:52:02,076 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=559, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=698, PETRI_PLACES=86, PETRI_TRANSITIONS=97} [2024-06-04 14:52:02,077 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 30 predicate places. [2024-06-04 14:52:02,077 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 97 transitions, 698 flow [2024-06-04 14:52:02,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 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) [2024-06-04 14:52:02,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:52:02,077 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:52:02,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-04 14:52:02,078 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:52:02,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:52:02,078 INFO L85 PathProgramCache]: Analyzing trace with hash 706980654, now seen corresponding path program 1 times [2024-06-04 14:52:02,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:52:02,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470817698] [2024-06-04 14:52:02,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:52:02,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:52:02,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:52:03,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:52:03,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:52:03,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470817698] [2024-06-04 14:52:03,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470817698] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:52:03,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:52:03,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:52:03,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58982704] [2024-06-04 14:52:03,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:52:03,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:52:03,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:52:03,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:52:03,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:52:03,398 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-04 14:52:03,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 97 transitions, 698 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:52:03,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:52:03,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-04 14:52:03,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:52:05,271 INFO L124 PetriNetUnfolderBase]: 9673/13495 cut-off events. [2024-06-04 14:52:05,271 INFO L125 PetriNetUnfolderBase]: For 113741/113747 co-relation queries the response was YES. [2024-06-04 14:52:05,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59072 conditions, 13495 events. 9673/13495 cut-off events. For 113741/113747 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 74098 event pairs, 4116 based on Foata normal form. 8/13489 useless extension candidates. Maximal degree in co-relation 59039. Up to 12941 conditions per place. [2024-06-04 14:52:05,374 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 102 selfloop transitions, 37 changer transitions 0/146 dead transitions. [2024-06-04 14:52:05,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 146 transitions, 1160 flow [2024-06-04 14:52:05,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:52:05,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:52:05,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 208 transitions. [2024-06-04 14:52:05,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49056603773584906 [2024-06-04 14:52:05,377 INFO L175 Difference]: Start difference. First operand has 86 places, 97 transitions, 698 flow. Second operand 8 states and 208 transitions. [2024-06-04 14:52:05,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 146 transitions, 1160 flow [2024-06-04 14:52:05,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 146 transitions, 1118 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-06-04 14:52:05,447 INFO L231 Difference]: Finished difference. Result has 93 places, 105 transitions, 831 flow [2024-06-04 14:52:05,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=656, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=831, PETRI_PLACES=93, PETRI_TRANSITIONS=105} [2024-06-04 14:52:05,448 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 37 predicate places. [2024-06-04 14:52:05,448 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 105 transitions, 831 flow [2024-06-04 14:52:05,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:52:05,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:52:05,449 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:52:05,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-04 14:52:05,449 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:52:05,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:52:05,449 INFO L85 PathProgramCache]: Analyzing trace with hash -271108072, now seen corresponding path program 2 times [2024-06-04 14:52:05,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:52:05,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289118111] [2024-06-04 14:52:05,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:52:05,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:52:05,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:52:06,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:52:06,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:52:06,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289118111] [2024-06-04 14:52:06,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289118111] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:52:06,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:52:06,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:52:06,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911047871] [2024-06-04 14:52:06,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:52:06,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:52:06,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:52:06,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:52:06,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:52:06,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-04 14:52:06,581 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 105 transitions, 831 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:52:06,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:52:06,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-04 14:52:06,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:52:08,280 INFO L124 PetriNetUnfolderBase]: 9658/13479 cut-off events. [2024-06-04 14:52:08,280 INFO L125 PetriNetUnfolderBase]: For 130533/130539 co-relation queries the response was YES. [2024-06-04 14:52:08,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61510 conditions, 13479 events. 9658/13479 cut-off events. For 130533/130539 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 74007 event pairs, 4113 based on Foata normal form. 8/13473 useless extension candidates. Maximal degree in co-relation 61474. Up to 12920 conditions per place. [2024-06-04 14:52:08,378 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 104 selfloop transitions, 45 changer transitions 0/156 dead transitions. [2024-06-04 14:52:08,378 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 156 transitions, 1359 flow [2024-06-04 14:52:08,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:52:08,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:52:08,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 208 transitions. [2024-06-04 14:52:08,380 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49056603773584906 [2024-06-04 14:52:08,380 INFO L175 Difference]: Start difference. First operand has 93 places, 105 transitions, 831 flow. Second operand 8 states and 208 transitions. [2024-06-04 14:52:08,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 156 transitions, 1359 flow [2024-06-04 14:52:08,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 156 transitions, 1241 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-04 14:52:08,474 INFO L231 Difference]: Finished difference. Result has 97 places, 116 transitions, 960 flow [2024-06-04 14:52:08,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=727, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=960, PETRI_PLACES=97, PETRI_TRANSITIONS=116} [2024-06-04 14:52:08,474 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 41 predicate places. [2024-06-04 14:52:08,474 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 116 transitions, 960 flow [2024-06-04 14:52:08,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:52:08,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:52:08,475 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:52:08,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-04 14:52:08,475 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:52:08,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:52:08,475 INFO L85 PathProgramCache]: Analyzing trace with hash -1041255616, now seen corresponding path program 3 times [2024-06-04 14:52:08,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:52:08,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227128959] [2024-06-04 14:52:08,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:52:08,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:52:08,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:52:09,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:52:09,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:52:09,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227128959] [2024-06-04 14:52:09,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227128959] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:52:09,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:52:09,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:52:09,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141332282] [2024-06-04 14:52:09,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:52:09,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:52:09,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:52:09,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:52:09,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:52:09,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-04 14:52:09,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 116 transitions, 960 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:52:09,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:52:09,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-04 14:52:09,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:52:11,209 INFO L124 PetriNetUnfolderBase]: 9735/13614 cut-off events. [2024-06-04 14:52:11,209 INFO L125 PetriNetUnfolderBase]: For 148207/148213 co-relation queries the response was YES. [2024-06-04 14:52:11,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64054 conditions, 13614 events. 9735/13614 cut-off events. For 148207/148213 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 75093 event pairs, 3700 based on Foata normal form. 8/13608 useless extension candidates. Maximal degree in co-relation 64016. Up to 12759 conditions per place. [2024-06-04 14:52:11,298 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 102 selfloop transitions, 56 changer transitions 0/165 dead transitions. [2024-06-04 14:52:11,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 165 transitions, 1458 flow [2024-06-04 14:52:11,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:52:11,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:52:11,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 212 transitions. [2024-06-04 14:52:11,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-04 14:52:11,300 INFO L175 Difference]: Start difference. First operand has 97 places, 116 transitions, 960 flow. Second operand 8 states and 212 transitions. [2024-06-04 14:52:11,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 165 transitions, 1458 flow [2024-06-04 14:52:11,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 165 transitions, 1364 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-04 14:52:11,391 INFO L231 Difference]: Finished difference. Result has 103 places, 121 transitions, 1079 flow [2024-06-04 14:52:11,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=868, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1079, PETRI_PLACES=103, PETRI_TRANSITIONS=121} [2024-06-04 14:52:11,391 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 47 predicate places. [2024-06-04 14:52:11,391 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 121 transitions, 1079 flow [2024-06-04 14:52:11,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:52:11,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:52:11,392 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:52:11,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-04 14:52:11,392 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:52:11,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:52:11,393 INFO L85 PathProgramCache]: Analyzing trace with hash 165969176, now seen corresponding path program 2 times [2024-06-04 14:52:11,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:52:11,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873384402] [2024-06-04 14:52:11,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:52:11,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:52:11,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:52:12,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:52:12,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:52:12,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873384402] [2024-06-04 14:52:12,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873384402] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:52:12,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:52:12,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:52:12,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960852338] [2024-06-04 14:52:12,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:52:12,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:52:12,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:52:12,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:52:12,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:52:12,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-04 14:52:12,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 121 transitions, 1079 flow. Second operand has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 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) [2024-06-04 14:52:12,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:52:12,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-04 14:52:12,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:52:13,742 INFO L124 PetriNetUnfolderBase]: 9721/13606 cut-off events. [2024-06-04 14:52:13,742 INFO L125 PetriNetUnfolderBase]: For 166960/166972 co-relation queries the response was YES. [2024-06-04 14:52:13,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65940 conditions, 13606 events. 9721/13606 cut-off events. For 166960/166972 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 75115 event pairs, 4061 based on Foata normal form. 14/13615 useless extension candidates. Maximal degree in co-relation 65900. Up to 13210 conditions per place. [2024-06-04 14:52:13,857 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 113 selfloop transitions, 21 changer transitions 0/141 dead transitions. [2024-06-04 14:52:13,857 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 141 transitions, 1397 flow [2024-06-04 14:52:13,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:52:13,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:52:13,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-04 14:52:13,859 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46855345911949686 [2024-06-04 14:52:13,859 INFO L175 Difference]: Start difference. First operand has 103 places, 121 transitions, 1079 flow. Second operand 6 states and 149 transitions. [2024-06-04 14:52:13,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 141 transitions, 1397 flow [2024-06-04 14:52:13,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 141 transitions, 1246 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-04 14:52:13,977 INFO L231 Difference]: Finished difference. Result has 104 places, 121 transitions, 979 flow [2024-06-04 14:52:13,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=928, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=979, PETRI_PLACES=104, PETRI_TRANSITIONS=121} [2024-06-04 14:52:13,977 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 48 predicate places. [2024-06-04 14:52:13,977 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 121 transitions, 979 flow [2024-06-04 14:52:13,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 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) [2024-06-04 14:52:13,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:52:13,978 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:52:13,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-04 14:52:13,978 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:52:13,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:52:13,978 INFO L85 PathProgramCache]: Analyzing trace with hash 1205960920, now seen corresponding path program 1 times [2024-06-04 14:52:13,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:52:13,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720378332] [2024-06-04 14:52:13,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:52:13,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:52:13,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:52:14,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:52:14,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:52:14,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720378332] [2024-06-04 14:52:14,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720378332] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:52:14,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:52:14,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:52:14,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374203081] [2024-06-04 14:52:14,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:52:14,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:52:14,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:52:14,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:52:14,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:52:14,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-04 14:52:14,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 121 transitions, 979 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:52:14,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:52:14,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-04 14:52:14,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:52:16,304 INFO L124 PetriNetUnfolderBase]: 8603/12342 cut-off events. [2024-06-04 14:52:16,305 INFO L125 PetriNetUnfolderBase]: For 154624/154624 co-relation queries the response was YES. [2024-06-04 14:52:16,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59491 conditions, 12342 events. 8603/12342 cut-off events. For 154624/154624 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 70410 event pairs, 3476 based on Foata normal form. 4/12306 useless extension candidates. Maximal degree in co-relation 59450. Up to 11727 conditions per place. [2024-06-04 14:52:16,408 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 126 selfloop transitions, 21 changer transitions 0/155 dead transitions. [2024-06-04 14:52:16,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 155 transitions, 1485 flow [2024-06-04 14:52:16,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:52:16,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:52:16,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 160 transitions. [2024-06-04 14:52:16,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5031446540880503 [2024-06-04 14:52:16,414 INFO L175 Difference]: Start difference. First operand has 104 places, 121 transitions, 979 flow. Second operand 6 states and 160 transitions. [2024-06-04 14:52:16,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 155 transitions, 1485 flow [2024-06-04 14:52:16,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 155 transitions, 1426 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-04 14:52:16,540 INFO L231 Difference]: Finished difference. Result has 105 places, 129 transitions, 1063 flow [2024-06-04 14:52:16,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=920, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1063, PETRI_PLACES=105, PETRI_TRANSITIONS=129} [2024-06-04 14:52:16,540 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 49 predicate places. [2024-06-04 14:52:16,541 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 129 transitions, 1063 flow [2024-06-04 14:52:16,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:52:16,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:52:16,541 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:52:16,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-04 14:52:16,541 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:52:16,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:52:16,542 INFO L85 PathProgramCache]: Analyzing trace with hash 193680758, now seen corresponding path program 2 times [2024-06-04 14:52:16,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:52:16,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752793972] [2024-06-04 14:52:16,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:52:16,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:52:16,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:52:17,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:52:17,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:52:17,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752793972] [2024-06-04 14:52:17,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752793972] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:52:17,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:52:17,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:52:17,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632692401] [2024-06-04 14:52:17,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:52:17,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:52:17,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:52:17,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:52:17,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:52:17,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-04 14:52:17,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 129 transitions, 1063 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:52:17,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:52:17,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-04 14:52:17,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:52:18,892 INFO L124 PetriNetUnfolderBase]: 8589/12328 cut-off events. [2024-06-04 14:52:18,892 INFO L125 PetriNetUnfolderBase]: For 174008/174014 co-relation queries the response was YES. [2024-06-04 14:52:18,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62039 conditions, 12328 events. 8589/12328 cut-off events. For 174008/174014 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 70427 event pairs, 3453 based on Foata normal form. 8/12300 useless extension candidates. Maximal degree in co-relation 61997. Up to 11715 conditions per place. [2024-06-04 14:52:18,983 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 120 selfloop transitions, 21 changer transitions 0/149 dead transitions. [2024-06-04 14:52:18,984 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 149 transitions, 1395 flow [2024-06-04 14:52:18,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:52:18,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:52:18,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-04 14:52:18,985 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48427672955974843 [2024-06-04 14:52:18,985 INFO L175 Difference]: Start difference. First operand has 105 places, 129 transitions, 1063 flow. Second operand 6 states and 154 transitions. [2024-06-04 14:52:18,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 149 transitions, 1395 flow [2024-06-04 14:52:19,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 149 transitions, 1325 flow, removed 30 selfloop flow, removed 2 redundant places. [2024-06-04 14:52:19,094 INFO L231 Difference]: Finished difference. Result has 109 places, 129 transitions, 1044 flow [2024-06-04 14:52:19,094 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=993, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1044, PETRI_PLACES=109, PETRI_TRANSITIONS=129} [2024-06-04 14:52:19,095 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 53 predicate places. [2024-06-04 14:52:19,095 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 129 transitions, 1044 flow [2024-06-04 14:52:19,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:52:19,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:52:19,095 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:52:19,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-04 14:52:19,095 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:52:19,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:52:19,096 INFO L85 PathProgramCache]: Analyzing trace with hash 499372978, now seen corresponding path program 1 times [2024-06-04 14:52:19,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:52:19,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286414847] [2024-06-04 14:52:19,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:52:19,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:52:19,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:52:19,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:52:19,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:52:19,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286414847] [2024-06-04 14:52:19,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286414847] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:52:19,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:52:19,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:52:19,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166772800] [2024-06-04 14:52:19,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:52:19,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:52:19,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:52:19,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:52:19,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:52:20,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-04 14:52:20,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 129 transitions, 1044 flow. Second operand has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:52:20,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:52:20,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-04 14:52:20,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:52:21,856 INFO L124 PetriNetUnfolderBase]: 9849/13814 cut-off events. [2024-06-04 14:52:21,856 INFO L125 PetriNetUnfolderBase]: For 222650/222656 co-relation queries the response was YES. [2024-06-04 14:52:21,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71172 conditions, 13814 events. 9849/13814 cut-off events. For 222650/222656 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 76674 event pairs, 3955 based on Foata normal form. 12/13815 useless extension candidates. Maximal degree in co-relation 71128. Up to 13008 conditions per place. [2024-06-04 14:52:22,131 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 130 selfloop transitions, 52 changer transitions 0/189 dead transitions. [2024-06-04 14:52:22,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 189 transitions, 1846 flow [2024-06-04 14:52:22,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:52:22,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:52:22,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 194 transitions. [2024-06-04 14:52:22,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.522911051212938 [2024-06-04 14:52:22,133 INFO L175 Difference]: Start difference. First operand has 109 places, 129 transitions, 1044 flow. Second operand 7 states and 194 transitions. [2024-06-04 14:52:22,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 189 transitions, 1846 flow [2024-06-04 14:52:22,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 189 transitions, 1791 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-04 14:52:22,230 INFO L231 Difference]: Finished difference. Result has 113 places, 147 transitions, 1354 flow [2024-06-04 14:52:22,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=989, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1354, PETRI_PLACES=113, PETRI_TRANSITIONS=147} [2024-06-04 14:52:22,231 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 57 predicate places. [2024-06-04 14:52:22,231 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 147 transitions, 1354 flow [2024-06-04 14:52:22,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:52:22,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:52:22,231 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:52:22,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-04 14:52:22,231 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:52:22,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:52:22,232 INFO L85 PathProgramCache]: Analyzing trace with hash 634843924, now seen corresponding path program 1 times [2024-06-04 14:52:22,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:52:22,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038558250] [2024-06-04 14:52:22,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:52:22,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:52:22,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:52:23,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:52:23,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:52:23,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038558250] [2024-06-04 14:52:23,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038558250] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:52:23,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:52:23,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:52:23,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745960278] [2024-06-04 14:52:23,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:52:23,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:52:23,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:52:23,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:52:23,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:52:23,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-04 14:52:23,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 147 transitions, 1354 flow. Second operand has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:52:23,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:52:23,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-04 14:52:23,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:52:25,049 INFO L124 PetriNetUnfolderBase]: 10091/14202 cut-off events. [2024-06-04 14:52:25,049 INFO L125 PetriNetUnfolderBase]: For 259323/259323 co-relation queries the response was YES. [2024-06-04 14:52:25,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77609 conditions, 14202 events. 10091/14202 cut-off events. For 259323/259323 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 79613 event pairs, 4079 based on Foata normal form. 18/14212 useless extension candidates. Maximal degree in co-relation 77562. Up to 13080 conditions per place. [2024-06-04 14:52:25,180 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 144 selfloop transitions, 53 changer transitions 0/204 dead transitions. [2024-06-04 14:52:25,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 204 transitions, 1981 flow [2024-06-04 14:52:25,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:52:25,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:52:25,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 213 transitions. [2024-06-04 14:52:25,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5023584905660378 [2024-06-04 14:52:25,183 INFO L175 Difference]: Start difference. First operand has 113 places, 147 transitions, 1354 flow. Second operand 8 states and 213 transitions. [2024-06-04 14:52:25,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 204 transitions, 1981 flow [2024-06-04 14:52:25,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 204 transitions, 1879 flow, removed 39 selfloop flow, removed 3 redundant places. [2024-06-04 14:52:25,423 INFO L231 Difference]: Finished difference. Result has 120 places, 156 transitions, 1517 flow [2024-06-04 14:52:25,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1258, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1517, PETRI_PLACES=120, PETRI_TRANSITIONS=156} [2024-06-04 14:52:25,424 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 64 predicate places. [2024-06-04 14:52:25,424 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 156 transitions, 1517 flow [2024-06-04 14:52:25,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:52:25,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:52:25,424 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:52:25,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-04 14:52:25,425 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:52:25,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:52:25,425 INFO L85 PathProgramCache]: Analyzing trace with hash 499383208, now seen corresponding path program 2 times [2024-06-04 14:52:25,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:52:25,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079730369] [2024-06-04 14:52:25,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:52:25,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:52:25,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:52:26,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:52:26,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:52:26,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079730369] [2024-06-04 14:52:26,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079730369] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:52:26,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:52:26,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:52:26,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002316935] [2024-06-04 14:52:26,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:52:26,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:52:26,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:52:26,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:52:26,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:52:26,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-04 14:52:26,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 156 transitions, 1517 flow. Second operand has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:52:26,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:52:26,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-04 14:52:26,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:52:28,172 INFO L124 PetriNetUnfolderBase]: 10257/14446 cut-off events. [2024-06-04 14:52:28,173 INFO L125 PetriNetUnfolderBase]: For 278023/278029 co-relation queries the response was YES. [2024-06-04 14:52:28,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79971 conditions, 14446 events. 10257/14446 cut-off events. For 278023/278029 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 81118 event pairs, 4003 based on Foata normal form. 12/14446 useless extension candidates. Maximal degree in co-relation 79921. Up to 13498 conditions per place. [2024-06-04 14:52:28,311 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 137 selfloop transitions, 58 changer transitions 0/202 dead transitions. [2024-06-04 14:52:28,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 202 transitions, 2281 flow [2024-06-04 14:52:28,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:52:28,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:52:28,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 188 transitions. [2024-06-04 14:52:28,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5067385444743935 [2024-06-04 14:52:28,313 INFO L175 Difference]: Start difference. First operand has 120 places, 156 transitions, 1517 flow. Second operand 7 states and 188 transitions. [2024-06-04 14:52:28,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 202 transitions, 2281 flow [2024-06-04 14:52:28,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 202 transitions, 2193 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-04 14:52:28,603 INFO L231 Difference]: Finished difference. Result has 125 places, 166 transitions, 1703 flow [2024-06-04 14:52:28,604 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1429, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1703, PETRI_PLACES=125, PETRI_TRANSITIONS=166} [2024-06-04 14:52:28,604 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 69 predicate places. [2024-06-04 14:52:28,604 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 166 transitions, 1703 flow [2024-06-04 14:52:28,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:52:28,604 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:52:28,605 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:52:28,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-04 14:52:28,605 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:52:28,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:52:28,605 INFO L85 PathProgramCache]: Analyzing trace with hash 1047319192, now seen corresponding path program 2 times [2024-06-04 14:52:28,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:52:28,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265316537] [2024-06-04 14:52:28,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:52:28,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:52:28,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:52:29,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:52:29,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:52:29,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265316537] [2024-06-04 14:52:29,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265316537] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:52:29,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:52:29,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:52:29,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803386296] [2024-06-04 14:52:29,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:52:29,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:52:29,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:52:29,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:52:29,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:52:29,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-04 14:52:29,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 166 transitions, 1703 flow. Second operand has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:52:29,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:52:29,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-04 14:52:29,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:52:31,588 INFO L124 PetriNetUnfolderBase]: 10218/14392 cut-off events. [2024-06-04 14:52:31,588 INFO L125 PetriNetUnfolderBase]: For 297083/297083 co-relation queries the response was YES. [2024-06-04 14:52:31,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80455 conditions, 14392 events. 10218/14392 cut-off events. For 297083/297083 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 80676 event pairs, 2988 based on Foata normal form. 18/14402 useless extension candidates. Maximal degree in co-relation 80403. Up to 12561 conditions per place. [2024-06-04 14:52:31,708 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 140 selfloop transitions, 61 changer transitions 0/208 dead transitions. [2024-06-04 14:52:31,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 208 transitions, 2225 flow [2024-06-04 14:52:31,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:52:31,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:52:31,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 190 transitions. [2024-06-04 14:52:31,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121293800539084 [2024-06-04 14:52:31,714 INFO L175 Difference]: Start difference. First operand has 125 places, 166 transitions, 1703 flow. Second operand 7 states and 190 transitions. [2024-06-04 14:52:31,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 208 transitions, 2225 flow [2024-06-04 14:52:32,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 208 transitions, 2103 flow, removed 29 selfloop flow, removed 3 redundant places. [2024-06-04 14:52:32,020 INFO L231 Difference]: Finished difference. Result has 129 places, 166 transitions, 1716 flow [2024-06-04 14:52:32,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1581, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1716, PETRI_PLACES=129, PETRI_TRANSITIONS=166} [2024-06-04 14:52:32,021 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 73 predicate places. [2024-06-04 14:52:32,021 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 166 transitions, 1716 flow [2024-06-04 14:52:32,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:52:32,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:52:32,022 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:52:32,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-04 14:52:32,022 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:52:32,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:52:32,022 INFO L85 PathProgramCache]: Analyzing trace with hash 1313016472, now seen corresponding path program 3 times [2024-06-04 14:52:32,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:52:32,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654467382] [2024-06-04 14:52:32,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:52:32,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:52:32,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:52:32,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:52:32,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:52:32,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654467382] [2024-06-04 14:52:32,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654467382] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:52:32,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:52:32,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:52:32,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188996422] [2024-06-04 14:52:32,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:52:32,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:52:32,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:52:32,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:52:32,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:52:33,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-04 14:52:33,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 166 transitions, 1716 flow. Second operand has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:52:33,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:52:33,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-04 14:52:33,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:52:34,786 INFO L124 PetriNetUnfolderBase]: 10179/14324 cut-off events. [2024-06-04 14:52:34,787 INFO L125 PetriNetUnfolderBase]: For 315419/315423 co-relation queries the response was YES. [2024-06-04 14:52:34,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80702 conditions, 14324 events. 10179/14324 cut-off events. For 315419/315423 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 80210 event pairs, 2511 based on Foata normal form. 19/14318 useless extension candidates. Maximal degree in co-relation 80649. Up to 12322 conditions per place. [2024-06-04 14:52:34,904 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 134 selfloop transitions, 63 changer transitions 0/204 dead transitions. [2024-06-04 14:52:34,904 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 204 transitions, 2224 flow [2024-06-04 14:52:34,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:52:34,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:52:34,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-04 14:52:34,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49326145552560646 [2024-06-04 14:52:34,906 INFO L175 Difference]: Start difference. First operand has 129 places, 166 transitions, 1716 flow. Second operand 7 states and 183 transitions. [2024-06-04 14:52:34,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 204 transitions, 2224 flow [2024-06-04 14:52:35,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 204 transitions, 2062 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-04 14:52:35,107 INFO L231 Difference]: Finished difference. Result has 129 places, 167 transitions, 1699 flow [2024-06-04 14:52:35,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1522, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1699, PETRI_PLACES=129, PETRI_TRANSITIONS=167} [2024-06-04 14:52:35,108 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 73 predicate places. [2024-06-04 14:52:35,108 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 167 transitions, 1699 flow [2024-06-04 14:52:35,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:52:35,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:52:35,109 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:52:35,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-04 14:52:35,109 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:52:35,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:52:35,109 INFO L85 PathProgramCache]: Analyzing trace with hash 853646248, now seen corresponding path program 3 times [2024-06-04 14:52:35,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:52:35,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498898063] [2024-06-04 14:52:35,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:52:35,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:52:35,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:52:35,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:52:35,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:52:35,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498898063] [2024-06-04 14:52:35,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498898063] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:52:35,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:52:35,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:52:35,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659488315] [2024-06-04 14:52:35,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:52:35,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:52:35,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:52:35,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:52:35,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:52:36,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-04 14:52:36,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 167 transitions, 1699 flow. Second operand has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:52:36,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:52:36,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-04 14:52:36,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:52:37,812 INFO L124 PetriNetUnfolderBase]: 10161/14292 cut-off events. [2024-06-04 14:52:37,812 INFO L125 PetriNetUnfolderBase]: For 315137/315156 co-relation queries the response was YES. [2024-06-04 14:52:37,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80967 conditions, 14292 events. 10161/14292 cut-off events. For 315137/315156 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 79867 event pairs, 3989 based on Foata normal form. 19/14295 useless extension candidates. Maximal degree in co-relation 80913. Up to 13376 conditions per place. [2024-06-04 14:52:37,939 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 131 selfloop transitions, 58 changer transitions 0/196 dead transitions. [2024-06-04 14:52:37,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 196 transitions, 2323 flow [2024-06-04 14:52:37,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:52:37,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:52:37,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-04 14:52:37,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48787061994609165 [2024-06-04 14:52:37,941 INFO L175 Difference]: Start difference. First operand has 129 places, 167 transitions, 1699 flow. Second operand 7 states and 181 transitions. [2024-06-04 14:52:37,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 196 transitions, 2323 flow [2024-06-04 14:52:38,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 196 transitions, 2148 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-04 14:52:38,358 INFO L231 Difference]: Finished difference. Result has 131 places, 167 transitions, 1651 flow [2024-06-04 14:52:38,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1524, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1651, PETRI_PLACES=131, PETRI_TRANSITIONS=167} [2024-06-04 14:52:38,359 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 75 predicate places. [2024-06-04 14:52:38,359 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 167 transitions, 1651 flow [2024-06-04 14:52:38,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:52:38,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:52:38,360 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:52:38,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-04 14:52:38,360 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:52:38,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:52:38,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1201545088, now seen corresponding path program 1 times [2024-06-04 14:52:38,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:52:38,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14044784] [2024-06-04 14:52:38,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:52:38,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:52:38,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:52:39,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:52:39,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:52:39,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14044784] [2024-06-04 14:52:39,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14044784] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:52:39,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:52:39,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:52:39,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686459229] [2024-06-04 14:52:39,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:52:39,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:52:39,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:52:39,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:52:39,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:52:39,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-04 14:52:39,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 167 transitions, 1651 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:52:39,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:52:39,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-04 14:52:39,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:52:41,025 INFO L124 PetriNetUnfolderBase]: 9043/13069 cut-off events. [2024-06-04 14:52:41,025 INFO L125 PetriNetUnfolderBase]: For 286649/286649 co-relation queries the response was YES. [2024-06-04 14:52:41,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73105 conditions, 13069 events. 9043/13069 cut-off events. For 286649/286649 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 75962 event pairs, 3499 based on Foata normal form. 4/12972 useless extension candidates. Maximal degree in co-relation 73050. Up to 12371 conditions per place. [2024-06-04 14:52:41,142 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 174 selfloop transitions, 18 changer transitions 0/200 dead transitions. [2024-06-04 14:52:41,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 200 transitions, 2161 flow [2024-06-04 14:52:41,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:52:41,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:52:41,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-04 14:52:41,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4797843665768194 [2024-06-04 14:52:41,143 INFO L175 Difference]: Start difference. First operand has 131 places, 167 transitions, 1651 flow. Second operand 7 states and 178 transitions. [2024-06-04 14:52:41,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 200 transitions, 2161 flow [2024-06-04 14:52:41,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 200 transitions, 2002 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-04 14:52:41,366 INFO L231 Difference]: Finished difference. Result has 132 places, 171 transitions, 1597 flow [2024-06-04 14:52:41,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1492, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1597, PETRI_PLACES=132, PETRI_TRANSITIONS=171} [2024-06-04 14:52:41,367 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 76 predicate places. [2024-06-04 14:52:41,367 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 171 transitions, 1597 flow [2024-06-04 14:52:41,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:52:41,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:52:41,367 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:52:41,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-04 14:52:41,367 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:52:41,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:52:41,368 INFO L85 PathProgramCache]: Analyzing trace with hash 676699426, now seen corresponding path program 2 times [2024-06-04 14:52:41,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:52:41,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895667641] [2024-06-04 14:52:41,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:52:41,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:52:41,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:52:42,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:52:42,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:52:42,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895667641] [2024-06-04 14:52:42,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895667641] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:52:42,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:52:42,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:52:42,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616649253] [2024-06-04 14:52:42,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:52:42,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:52:42,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:52:42,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:52:42,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:52:42,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-04 14:52:42,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 171 transitions, 1597 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:52:42,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:52:42,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-04 14:52:42,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:52:44,162 INFO L124 PetriNetUnfolderBase]: 9075/13132 cut-off events. [2024-06-04 14:52:44,162 INFO L125 PetriNetUnfolderBase]: For 309861/309861 co-relation queries the response was YES. [2024-06-04 14:52:44,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75107 conditions, 13132 events. 9075/13132 cut-off events. For 309861/309861 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 76434 event pairs, 3438 based on Foata normal form. 4/13029 useless extension candidates. Maximal degree in co-relation 75053. Up to 12302 conditions per place. [2024-06-04 14:52:44,279 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 167 selfloop transitions, 35 changer transitions 0/210 dead transitions. [2024-06-04 14:52:44,279 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 210 transitions, 2293 flow [2024-06-04 14:52:44,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:52:44,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:52:44,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-04 14:52:44,280 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49595687331536387 [2024-06-04 14:52:44,280 INFO L175 Difference]: Start difference. First operand has 132 places, 171 transitions, 1597 flow. Second operand 7 states and 184 transitions. [2024-06-04 14:52:44,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 210 transitions, 2293 flow [2024-06-04 14:52:44,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 210 transitions, 2218 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-04 14:52:44,536 INFO L231 Difference]: Finished difference. Result has 134 places, 179 transitions, 1729 flow [2024-06-04 14:52:44,536 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1522, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1729, PETRI_PLACES=134, PETRI_TRANSITIONS=179} [2024-06-04 14:52:44,537 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 78 predicate places. [2024-06-04 14:52:44,537 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 179 transitions, 1729 flow [2024-06-04 14:52:44,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:52:44,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:52:44,537 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:52:44,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-04 14:52:44,537 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:52:44,538 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:52:44,538 INFO L85 PathProgramCache]: Analyzing trace with hash 1709137600, now seen corresponding path program 3 times [2024-06-04 14:52:44,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:52:44,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317571027] [2024-06-04 14:52:44,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:52:44,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:52:44,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:52:45,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:52:45,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:52:45,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317571027] [2024-06-04 14:52:45,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317571027] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:52:45,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:52:45,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:52:45,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213850140] [2024-06-04 14:52:45,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:52:45,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:52:45,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:52:45,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:52:45,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:52:45,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-04 14:52:45,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 179 transitions, 1729 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:52:45,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:52:45,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-04 14:52:45,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:52:47,385 INFO L124 PetriNetUnfolderBase]: 9061/13112 cut-off events. [2024-06-04 14:52:47,385 INFO L125 PetriNetUnfolderBase]: For 336806/336806 co-relation queries the response was YES. [2024-06-04 14:52:47,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77560 conditions, 13112 events. 9061/13112 cut-off events. For 336806/336806 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 76254 event pairs, 3396 based on Foata normal form. 4/13013 useless extension candidates. Maximal degree in co-relation 77505. Up to 12290 conditions per place. [2024-06-04 14:52:47,498 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 161 selfloop transitions, 35 changer transitions 0/204 dead transitions. [2024-06-04 14:52:47,498 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 204 transitions, 2183 flow [2024-06-04 14:52:47,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:52:47,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:52:47,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-04 14:52:47,499 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4797843665768194 [2024-06-04 14:52:47,499 INFO L175 Difference]: Start difference. First operand has 134 places, 179 transitions, 1729 flow. Second operand 7 states and 178 transitions. [2024-06-04 14:52:47,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 204 transitions, 2183 flow [2024-06-04 14:52:47,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 204 transitions, 2075 flow, removed 44 selfloop flow, removed 3 redundant places. [2024-06-04 14:52:47,757 INFO L231 Difference]: Finished difference. Result has 138 places, 179 transitions, 1700 flow [2024-06-04 14:52:47,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1621, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1700, PETRI_PLACES=138, PETRI_TRANSITIONS=179} [2024-06-04 14:52:47,757 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 82 predicate places. [2024-06-04 14:52:47,757 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 179 transitions, 1700 flow [2024-06-04 14:52:47,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:52:47,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:52:47,758 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:52:47,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-04 14:52:47,758 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:52:47,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:52:47,759 INFO L85 PathProgramCache]: Analyzing trace with hash 854077210, now seen corresponding path program 1 times [2024-06-04 14:52:47,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:52:47,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510417785] [2024-06-04 14:52:47,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:52:47,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:52:47,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:52:48,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:52:48,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:52:48,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510417785] [2024-06-04 14:52:48,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510417785] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:52:48,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:52:48,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:52:48,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408822174] [2024-06-04 14:52:48,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:52:48,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:52:48,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:52:48,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:52:48,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:52:49,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-04 14:52:49,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 179 transitions, 1700 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:52:49,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:52:49,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-04 14:52:49,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:52:50,947 INFO L124 PetriNetUnfolderBase]: 9049/13100 cut-off events. [2024-06-04 14:52:50,947 INFO L125 PetriNetUnfolderBase]: For 355127/355127 co-relation queries the response was YES. [2024-06-04 14:52:50,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77671 conditions, 13100 events. 9049/13100 cut-off events. For 355127/355127 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 76242 event pairs, 3412 based on Foata normal form. 4/13028 useless extension candidates. Maximal degree in co-relation 77614. Up to 12391 conditions per place. [2024-06-04 14:52:51,048 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 184 selfloop transitions, 17 changer transitions 0/209 dead transitions. [2024-06-04 14:52:51,048 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 209 transitions, 2256 flow [2024-06-04 14:52:51,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:52:51,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:52:51,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-04 14:52:51,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4609164420485175 [2024-06-04 14:52:51,050 INFO L175 Difference]: Start difference. First operand has 138 places, 179 transitions, 1700 flow. Second operand 7 states and 171 transitions. [2024-06-04 14:52:51,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 209 transitions, 2256 flow [2024-06-04 14:52:51,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 209 transitions, 2139 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-04 14:52:51,322 INFO L231 Difference]: Finished difference. Result has 139 places, 186 transitions, 1734 flow [2024-06-04 14:52:51,323 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1590, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1734, PETRI_PLACES=139, PETRI_TRANSITIONS=186} [2024-06-04 14:52:51,323 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 83 predicate places. [2024-06-04 14:52:51,323 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 186 transitions, 1734 flow [2024-06-04 14:52:51,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:52:51,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:52:51,324 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:52:51,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-04 14:52:51,324 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:52:51,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:52:51,324 INFO L85 PathProgramCache]: Analyzing trace with hash -136381210, now seen corresponding path program 1 times [2024-06-04 14:52:51,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:52:51,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339972241] [2024-06-04 14:52:51,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:52:51,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:52:51,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:52:52,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:52:52,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:52:52,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339972241] [2024-06-04 14:52:52,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339972241] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:52:52,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:52:52,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:52:52,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704495118] [2024-06-04 14:52:52,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:52:52,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:52:52,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:52:52,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:52:52,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:52:52,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-04 14:52:52,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 186 transitions, 1734 flow. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:52:52,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:52:52,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-04 14:52:52,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:52:53,652 INFO L124 PetriNetUnfolderBase]: 8663/12696 cut-off events. [2024-06-04 14:52:53,652 INFO L125 PetriNetUnfolderBase]: For 376752/376900 co-relation queries the response was YES. [2024-06-04 14:52:53,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78373 conditions, 12696 events. 8663/12696 cut-off events. For 376752/376900 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 76001 event pairs, 3214 based on Foata normal form. 1/12578 useless extension candidates. Maximal degree in co-relation 78315. Up to 11797 conditions per place. [2024-06-04 14:52:53,782 INFO L140 encePairwiseOnDemand]: 45/53 looper letters, 171 selfloop transitions, 10 changer transitions 0/201 dead transitions. [2024-06-04 14:52:53,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 201 transitions, 2178 flow [2024-06-04 14:52:53,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 14:52:53,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 14:52:53,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 127 transitions. [2024-06-04 14:52:53,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47924528301886793 [2024-06-04 14:52:53,784 INFO L175 Difference]: Start difference. First operand has 139 places, 186 transitions, 1734 flow. Second operand 5 states and 127 transitions. [2024-06-04 14:52:53,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 201 transitions, 2178 flow [2024-06-04 14:52:54,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 201 transitions, 2096 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-04 14:52:54,158 INFO L231 Difference]: Finished difference. Result has 140 places, 190 transitions, 1741 flow [2024-06-04 14:52:54,158 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1652, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1741, PETRI_PLACES=140, PETRI_TRANSITIONS=190} [2024-06-04 14:52:54,161 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 84 predicate places. [2024-06-04 14:52:54,161 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 190 transitions, 1741 flow [2024-06-04 14:52:54,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:52:54,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:52:54,161 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:52:54,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-04 14:52:54,162 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:52:54,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:52:54,162 INFO L85 PathProgramCache]: Analyzing trace with hash -1704698445, now seen corresponding path program 1 times [2024-06-04 14:52:54,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:52:54,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369725241] [2024-06-04 14:52:54,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:52:54,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:52:54,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:52:55,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:52:55,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:52:55,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369725241] [2024-06-04 14:52:55,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369725241] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:52:55,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:52:55,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:52:55,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357654391] [2024-06-04 14:52:55,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:52:55,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:52:55,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:52:55,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:52:55,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:52:55,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-04 14:52:55,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 190 transitions, 1741 flow. Second operand has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:52:55,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:52:55,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-04 14:52:55,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:52:57,104 INFO L124 PetriNetUnfolderBase]: 10351/14580 cut-off events. [2024-06-04 14:52:57,105 INFO L125 PetriNetUnfolderBase]: For 476920/476929 co-relation queries the response was YES. [2024-06-04 14:52:57,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93512 conditions, 14580 events. 10351/14580 cut-off events. For 476920/476929 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 81760 event pairs, 3970 based on Foata normal form. 12/14584 useless extension candidates. Maximal degree in co-relation 93453. Up to 13523 conditions per place. [2024-06-04 14:52:57,246 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 160 selfloop transitions, 75 changer transitions 0/242 dead transitions. [2024-06-04 14:52:57,246 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 242 transitions, 2715 flow [2024-06-04 14:52:57,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:52:57,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:52:57,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 190 transitions. [2024-06-04 14:52:57,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121293800539084 [2024-06-04 14:52:57,248 INFO L175 Difference]: Start difference. First operand has 140 places, 190 transitions, 1741 flow. Second operand 7 states and 190 transitions. [2024-06-04 14:52:57,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 242 transitions, 2715 flow [2024-06-04 14:52:57,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 242 transitions, 2654 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-06-04 14:52:57,588 INFO L231 Difference]: Finished difference. Result has 145 places, 203 transitions, 2046 flow [2024-06-04 14:52:57,588 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1680, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2046, PETRI_PLACES=145, PETRI_TRANSITIONS=203} [2024-06-04 14:52:57,589 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 89 predicate places. [2024-06-04 14:52:57,589 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 203 transitions, 2046 flow [2024-06-04 14:52:57,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:52:57,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:52:57,589 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:52:57,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-04 14:52:57,590 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:52:57,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:52:57,590 INFO L85 PathProgramCache]: Analyzing trace with hash -1698984525, now seen corresponding path program 2 times [2024-06-04 14:52:57,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:52:57,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279527878] [2024-06-04 14:52:57,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:52:57,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:52:57,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:52:58,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:52:58,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:52:58,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279527878] [2024-06-04 14:52:58,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279527878] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:52:58,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:52:58,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:52:58,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038567991] [2024-06-04 14:52:58,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:52:58,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:52:58,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:52:58,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:52:58,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:52:58,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-04 14:52:58,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 203 transitions, 2046 flow. Second operand has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:52:58,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:52:58,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-04 14:52:58,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:53:00,592 INFO L124 PetriNetUnfolderBase]: 10323/14540 cut-off events. [2024-06-04 14:53:00,592 INFO L125 PetriNetUnfolderBase]: For 500592/500601 co-relation queries the response was YES. [2024-06-04 14:53:00,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94930 conditions, 14540 events. 10323/14540 cut-off events. For 500592/500601 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 81510 event pairs, 3933 based on Foata normal form. 12/14544 useless extension candidates. Maximal degree in co-relation 94869. Up to 13503 conditions per place. [2024-06-04 14:53:00,747 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 161 selfloop transitions, 71 changer transitions 0/239 dead transitions. [2024-06-04 14:53:00,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 239 transitions, 2834 flow [2024-06-04 14:53:00,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:53:00,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:53:00,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 187 transitions. [2024-06-04 14:53:00,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5040431266846361 [2024-06-04 14:53:00,749 INFO L175 Difference]: Start difference. First operand has 145 places, 203 transitions, 2046 flow. Second operand 7 states and 187 transitions. [2024-06-04 14:53:00,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 239 transitions, 2834 flow [2024-06-04 14:53:01,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 239 transitions, 2713 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-04 14:53:01,182 INFO L231 Difference]: Finished difference. Result has 149 places, 203 transitions, 2079 flow [2024-06-04 14:53:01,183 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1925, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2079, PETRI_PLACES=149, PETRI_TRANSITIONS=203} [2024-06-04 14:53:01,183 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 93 predicate places. [2024-06-04 14:53:01,183 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 203 transitions, 2079 flow [2024-06-04 14:53:01,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:01,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:53:01,184 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:53:01,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-04 14:53:01,184 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:53:01,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:53:01,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1399092659, now seen corresponding path program 3 times [2024-06-04 14:53:01,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:53:01,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837264807] [2024-06-04 14:53:01,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:53:01,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:53:01,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:53:02,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:53:02,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:53:02,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837264807] [2024-06-04 14:53:02,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837264807] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:53:02,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:53:02,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:53:02,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194640175] [2024-06-04 14:53:02,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:53:02,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:53:02,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:53:02,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:53:02,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:53:02,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-04 14:53:02,143 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 203 transitions, 2079 flow. Second operand has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:02,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:53:02,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-04 14:53:02,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:53:04,209 INFO L124 PetriNetUnfolderBase]: 10299/14486 cut-off events. [2024-06-04 14:53:04,209 INFO L125 PetriNetUnfolderBase]: For 526876/526881 co-relation queries the response was YES. [2024-06-04 14:53:04,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95483 conditions, 14486 events. 10299/14486 cut-off events. For 526876/526881 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 80945 event pairs, 3969 based on Foata normal form. 4/14472 useless extension candidates. Maximal degree in co-relation 95421. Up to 13483 conditions per place. [2024-06-04 14:53:04,345 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 154 selfloop transitions, 78 changer transitions 0/239 dead transitions. [2024-06-04 14:53:04,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 239 transitions, 2875 flow [2024-06-04 14:53:04,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:53:04,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:53:04,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 187 transitions. [2024-06-04 14:53:04,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5040431266846361 [2024-06-04 14:53:04,347 INFO L175 Difference]: Start difference. First operand has 149 places, 203 transitions, 2079 flow. Second operand 7 states and 187 transitions. [2024-06-04 14:53:04,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 239 transitions, 2875 flow [2024-06-04 14:53:04,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 239 transitions, 2718 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-04 14:53:04,802 INFO L231 Difference]: Finished difference. Result has 152 places, 203 transitions, 2087 flow [2024-06-04 14:53:04,802 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1922, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2087, PETRI_PLACES=152, PETRI_TRANSITIONS=203} [2024-06-04 14:53:04,802 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 96 predicate places. [2024-06-04 14:53:04,802 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 203 transitions, 2087 flow [2024-06-04 14:53:04,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:04,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:53:04,803 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:53:04,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-04 14:53:04,803 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:53:04,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:53:04,803 INFO L85 PathProgramCache]: Analyzing trace with hash 499647253, now seen corresponding path program 4 times [2024-06-04 14:53:04,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:53:04,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327279450] [2024-06-04 14:53:04,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:53:04,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:53:04,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:53:05,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:53:05,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:53:05,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327279450] [2024-06-04 14:53:05,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327279450] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:53:05,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:53:05,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:53:05,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692401293] [2024-06-04 14:53:05,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:53:05,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:53:05,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:53:05,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:53:05,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:53:05,735 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-04 14:53:05,735 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 203 transitions, 2087 flow. Second operand has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:05,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:53:05,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-04 14:53:05,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:53:07,932 INFO L124 PetriNetUnfolderBase]: 10331/14533 cut-off events. [2024-06-04 14:53:07,932 INFO L125 PetriNetUnfolderBase]: For 555368/555379 co-relation queries the response was YES. [2024-06-04 14:53:07,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96700 conditions, 14533 events. 10331/14533 cut-off events. For 555368/555379 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 81269 event pairs, 3978 based on Foata normal form. 8/14523 useless extension candidates. Maximal degree in co-relation 96637. Up to 13502 conditions per place. [2024-06-04 14:53:08,071 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 149 selfloop transitions, 82 changer transitions 0/238 dead transitions. [2024-06-04 14:53:08,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 238 transitions, 2828 flow [2024-06-04 14:53:08,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:53:08,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:53:08,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-04 14:53:08,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49326145552560646 [2024-06-04 14:53:08,072 INFO L175 Difference]: Start difference. First operand has 152 places, 203 transitions, 2087 flow. Second operand 7 states and 183 transitions. [2024-06-04 14:53:08,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 238 transitions, 2828 flow [2024-06-04 14:53:08,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 238 transitions, 2487 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-04 14:53:08,467 INFO L231 Difference]: Finished difference. Result has 150 places, 207 transitions, 1992 flow [2024-06-04 14:53:08,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1765, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1992, PETRI_PLACES=150, PETRI_TRANSITIONS=207} [2024-06-04 14:53:08,467 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 94 predicate places. [2024-06-04 14:53:08,468 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 207 transitions, 1992 flow [2024-06-04 14:53:08,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:08,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:53:08,468 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:53:08,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-04 14:53:08,468 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:53:08,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:53:08,469 INFO L85 PathProgramCache]: Analyzing trace with hash 1437937621, now seen corresponding path program 5 times [2024-06-04 14:53:08,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:53:08,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807703386] [2024-06-04 14:53:08,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:53:08,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:53:08,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:53:09,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:53:09,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:53:09,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807703386] [2024-06-04 14:53:09,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807703386] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:53:09,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:53:09,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:53:09,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031067641] [2024-06-04 14:53:09,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:53:09,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:53:09,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:53:09,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:53:09,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:53:09,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-04 14:53:09,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 207 transitions, 1992 flow. Second operand has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:09,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:53:09,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-04 14:53:09,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:53:11,599 INFO L124 PetriNetUnfolderBase]: 10303/14500 cut-off events. [2024-06-04 14:53:11,600 INFO L125 PetriNetUnfolderBase]: For 578179/578196 co-relation queries the response was YES. [2024-06-04 14:53:11,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96696 conditions, 14500 events. 10303/14500 cut-off events. For 578179/578196 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 81197 event pairs, 3940 based on Foata normal form. 18/14502 useless extension candidates. Maximal degree in co-relation 96633. Up to 13482 conditions per place. [2024-06-04 14:53:11,723 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 154 selfloop transitions, 73 changer transitions 0/234 dead transitions. [2024-06-04 14:53:11,723 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 234 transitions, 2644 flow [2024-06-04 14:53:11,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:53:11,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:53:11,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-04 14:53:11,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48247978436657685 [2024-06-04 14:53:11,733 INFO L175 Difference]: Start difference. First operand has 150 places, 207 transitions, 1992 flow. Second operand 7 states and 179 transitions. [2024-06-04 14:53:11,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 234 transitions, 2644 flow [2024-06-04 14:53:12,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 234 transitions, 2476 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-04 14:53:12,226 INFO L231 Difference]: Finished difference. Result has 153 places, 207 transitions, 1981 flow [2024-06-04 14:53:12,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1824, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1981, PETRI_PLACES=153, PETRI_TRANSITIONS=207} [2024-06-04 14:53:12,226 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 97 predicate places. [2024-06-04 14:53:12,226 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 207 transitions, 1981 flow [2024-06-04 14:53:12,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:12,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:53:12,227 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:53:12,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-04 14:53:12,227 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:53:12,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:53:12,227 INFO L85 PathProgramCache]: Analyzing trace with hash 698949043, now seen corresponding path program 6 times [2024-06-04 14:53:12,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:53:12,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762466639] [2024-06-04 14:53:12,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:53:12,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:53:12,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:53:13,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:53:13,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:53:13,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762466639] [2024-06-04 14:53:13,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762466639] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:53:13,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:53:13,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:53:13,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650100313] [2024-06-04 14:53:13,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:53:13,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:53:13,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:53:13,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:53:13,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:53:13,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-04 14:53:13,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 207 transitions, 1981 flow. Second operand has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:13,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:53:13,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-04 14:53:13,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:53:15,446 INFO L124 PetriNetUnfolderBase]: 10279/14469 cut-off events. [2024-06-04 14:53:15,446 INFO L125 PetriNetUnfolderBase]: For 603409/603432 co-relation queries the response was YES. [2024-06-04 14:53:15,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97174 conditions, 14469 events. 10279/14469 cut-off events. For 603409/603432 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 81047 event pairs, 3940 based on Foata normal form. 18/14471 useless extension candidates. Maximal degree in co-relation 97110. Up to 13462 conditions per place. [2024-06-04 14:53:15,567 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 148 selfloop transitions, 77 changer transitions 0/232 dead transitions. [2024-06-04 14:53:15,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 232 transitions, 2499 flow [2024-06-04 14:53:15,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:53:15,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:53:15,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-04 14:53:15,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4743935309973046 [2024-06-04 14:53:15,568 INFO L175 Difference]: Start difference. First operand has 153 places, 207 transitions, 1981 flow. Second operand 7 states and 176 transitions. [2024-06-04 14:53:15,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 232 transitions, 2499 flow [2024-06-04 14:53:15,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 232 transitions, 2355 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-04 14:53:15,943 INFO L231 Difference]: Finished difference. Result has 156 places, 207 transitions, 2000 flow [2024-06-04 14:53:15,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1837, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2000, PETRI_PLACES=156, PETRI_TRANSITIONS=207} [2024-06-04 14:53:15,943 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 100 predicate places. [2024-06-04 14:53:15,944 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 207 transitions, 2000 flow [2024-06-04 14:53:15,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:15,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:53:15,944 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:53:15,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-04 14:53:15,944 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:53:15,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:53:15,945 INFO L85 PathProgramCache]: Analyzing trace with hash 67152126, now seen corresponding path program 1 times [2024-06-04 14:53:15,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:53:15,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443793879] [2024-06-04 14:53:15,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:53:15,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:53:15,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:53:17,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:53:17,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:53:17,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443793879] [2024-06-04 14:53:17,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443793879] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:53:17,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:53:17,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:53:17,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005189901] [2024-06-04 14:53:17,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:53:17,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:53:17,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:53:17,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:53:17,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:53:17,184 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-04 14:53:17,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 207 transitions, 2000 flow. Second operand has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:17,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:53:17,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-04 14:53:17,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:53:18,751 INFO L124 PetriNetUnfolderBase]: 8673/12766 cut-off events. [2024-06-04 14:53:18,752 INFO L125 PetriNetUnfolderBase]: For 528119/528247 co-relation queries the response was YES. [2024-06-04 14:53:18,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85248 conditions, 12766 events. 8673/12766 cut-off events. For 528119/528247 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 76532 event pairs, 3180 based on Foata normal form. 1/12652 useless extension candidates. Maximal degree in co-relation 85183. Up to 11781 conditions per place. [2024-06-04 14:53:19,074 INFO L140 encePairwiseOnDemand]: 44/53 looper letters, 185 selfloop transitions, 14 changer transitions 0/223 dead transitions. [2024-06-04 14:53:19,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 223 transitions, 2488 flow [2024-06-04 14:53:19,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:53:19,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:53:19,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-04 14:53:19,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46226415094339623 [2024-06-04 14:53:19,076 INFO L175 Difference]: Start difference. First operand has 156 places, 207 transitions, 2000 flow. Second operand 6 states and 147 transitions. [2024-06-04 14:53:19,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 223 transitions, 2488 flow [2024-06-04 14:53:19,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 223 transitions, 2260 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-04 14:53:19,463 INFO L231 Difference]: Finished difference. Result has 154 places, 211 transitions, 1875 flow [2024-06-04 14:53:19,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1772, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1875, PETRI_PLACES=154, PETRI_TRANSITIONS=211} [2024-06-04 14:53:19,464 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 98 predicate places. [2024-06-04 14:53:19,464 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 211 transitions, 1875 flow [2024-06-04 14:53:19,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:19,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:53:19,464 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:53:19,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-04 14:53:19,465 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:53:19,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:53:19,465 INFO L85 PathProgramCache]: Analyzing trace with hash -1508686581, now seen corresponding path program 1 times [2024-06-04 14:53:19,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:53:19,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274866611] [2024-06-04 14:53:19,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:53:19,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:53:19,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:53:20,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:53:20,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:53:20,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274866611] [2024-06-04 14:53:20,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274866611] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:53:20,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:53:20,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:53:20,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411406188] [2024-06-04 14:53:20,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:53:20,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:53:20,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:53:20,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:53:20,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:53:20,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-04 14:53:20,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 211 transitions, 1875 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:20,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:53:20,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-04 14:53:20,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:53:22,770 INFO L124 PetriNetUnfolderBase]: 10751/15146 cut-off events. [2024-06-04 14:53:22,770 INFO L125 PetriNetUnfolderBase]: For 699609/699618 co-relation queries the response was YES. [2024-06-04 14:53:22,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105127 conditions, 15146 events. 10751/15146 cut-off events. For 699609/699618 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 85053 event pairs, 3237 based on Foata normal form. 36/15174 useless extension candidates. Maximal degree in co-relation 105061. Up to 13476 conditions per place. [2024-06-04 14:53:22,953 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 177 selfloop transitions, 90 changer transitions 0/274 dead transitions. [2024-06-04 14:53:22,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 274 transitions, 2859 flow [2024-06-04 14:53:22,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:53:22,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:53:22,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 221 transitions. [2024-06-04 14:53:22,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5212264150943396 [2024-06-04 14:53:22,955 INFO L175 Difference]: Start difference. First operand has 154 places, 211 transitions, 1875 flow. Second operand 8 states and 221 transitions. [2024-06-04 14:53:22,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 274 transitions, 2859 flow [2024-06-04 14:53:23,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 274 transitions, 2784 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-04 14:53:23,525 INFO L231 Difference]: Finished difference. Result has 159 places, 219 transitions, 2153 flow [2024-06-04 14:53:23,733 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1800, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2153, PETRI_PLACES=159, PETRI_TRANSITIONS=219} [2024-06-04 14:53:23,733 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 103 predicate places. [2024-06-04 14:53:23,733 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 219 transitions, 2153 flow [2024-06-04 14:53:23,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:23,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:53:23,733 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:53:23,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-04 14:53:23,733 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:53:23,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:53:23,734 INFO L85 PathProgramCache]: Analyzing trace with hash -1424253657, now seen corresponding path program 2 times [2024-06-04 14:53:23,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:53:23,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467621962] [2024-06-04 14:53:23,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:53:23,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:53:23,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:53:24,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:53:24,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:53:24,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467621962] [2024-06-04 14:53:24,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467621962] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:53:24,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:53:24,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:53:24,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105758640] [2024-06-04 14:53:24,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:53:24,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:53:24,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:53:24,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:53:24,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:53:24,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-04 14:53:24,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 219 transitions, 2153 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:24,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:53:24,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-04 14:53:24,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:53:27,220 INFO L124 PetriNetUnfolderBase]: 11001/15492 cut-off events. [2024-06-04 14:53:27,220 INFO L125 PetriNetUnfolderBase]: For 757218/757227 co-relation queries the response was YES. [2024-06-04 14:53:27,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111176 conditions, 15492 events. 11001/15492 cut-off events. For 757218/757227 co-relation queries the response was YES. Maximal size of possible extension queue 512. Compared 87251 event pairs, 3927 based on Foata normal form. 44/15528 useless extension candidates. Maximal degree in co-relation 111108. Up to 14234 conditions per place. [2024-06-04 14:53:27,424 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 177 selfloop transitions, 85 changer transitions 0/269 dead transitions. [2024-06-04 14:53:27,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 269 transitions, 2890 flow [2024-06-04 14:53:27,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:53:27,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:53:27,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 214 transitions. [2024-06-04 14:53:27,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5047169811320755 [2024-06-04 14:53:27,426 INFO L175 Difference]: Start difference. First operand has 159 places, 219 transitions, 2153 flow. Second operand 8 states and 214 transitions. [2024-06-04 14:53:27,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 269 transitions, 2890 flow [2024-06-04 14:53:28,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 269 transitions, 2745 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-04 14:53:28,456 INFO L231 Difference]: Finished difference. Result has 163 places, 222 transitions, 2264 flow [2024-06-04 14:53:28,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2010, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2264, PETRI_PLACES=163, PETRI_TRANSITIONS=222} [2024-06-04 14:53:28,457 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 107 predicate places. [2024-06-04 14:53:28,457 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 222 transitions, 2264 flow [2024-06-04 14:53:28,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:28,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:53:28,457 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:53:28,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-04 14:53:28,458 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:53:28,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:53:28,458 INFO L85 PathProgramCache]: Analyzing trace with hash -1390356729, now seen corresponding path program 1 times [2024-06-04 14:53:28,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:53:28,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370537538] [2024-06-04 14:53:28,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:53:28,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:53:28,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:53:29,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:53:29,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:53:29,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370537538] [2024-06-04 14:53:29,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370537538] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:53:29,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:53:29,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:53:29,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654566781] [2024-06-04 14:53:29,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:53:29,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:53:29,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:53:29,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:53:29,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:53:29,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-04 14:53:29,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 222 transitions, 2264 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:29,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:53:29,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-04 14:53:29,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:53:32,139 INFO L124 PetriNetUnfolderBase]: 11065/15591 cut-off events. [2024-06-04 14:53:32,139 INFO L125 PetriNetUnfolderBase]: For 775194/775194 co-relation queries the response was YES. [2024-06-04 14:53:32,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112901 conditions, 15591 events. 11065/15591 cut-off events. For 775194/775194 co-relation queries the response was YES. Maximal size of possible extension queue 514. Compared 88131 event pairs, 4105 based on Foata normal form. 8/15591 useless extension candidates. Maximal degree in co-relation 112831. Up to 14871 conditions per place. [2024-06-04 14:53:32,328 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 209 selfloop transitions, 50 changer transitions 0/266 dead transitions. [2024-06-04 14:53:32,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 266 transitions, 2964 flow [2024-06-04 14:53:32,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:53:32,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:53:32,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-04 14:53:32,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4882075471698113 [2024-06-04 14:53:32,330 INFO L175 Difference]: Start difference. First operand has 163 places, 222 transitions, 2264 flow. Second operand 8 states and 207 transitions. [2024-06-04 14:53:32,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 266 transitions, 2964 flow [2024-06-04 14:53:33,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 266 transitions, 2769 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-04 14:53:33,044 INFO L231 Difference]: Finished difference. Result has 165 places, 227 transitions, 2269 flow [2024-06-04 14:53:33,044 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2069, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2269, PETRI_PLACES=165, PETRI_TRANSITIONS=227} [2024-06-04 14:53:33,045 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 109 predicate places. [2024-06-04 14:53:33,045 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 227 transitions, 2269 flow [2024-06-04 14:53:33,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:33,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:53:33,046 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:53:33,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-04 14:53:33,046 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:53:33,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:53:33,046 INFO L85 PathProgramCache]: Analyzing trace with hash -469764863, now seen corresponding path program 2 times [2024-06-04 14:53:33,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:53:33,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263037257] [2024-06-04 14:53:33,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:53:33,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:53:33,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:53:33,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:53:33,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:53:33,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263037257] [2024-06-04 14:53:33,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263037257] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:53:33,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:53:33,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:53:33,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445102999] [2024-06-04 14:53:33,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:53:33,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:53:33,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:53:33,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:53:33,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:53:34,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-04 14:53:34,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 227 transitions, 2269 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:34,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:53:34,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-04 14:53:34,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:53:36,942 INFO L124 PetriNetUnfolderBase]: 11221/15823 cut-off events. [2024-06-04 14:53:36,942 INFO L125 PetriNetUnfolderBase]: For 820900/820903 co-relation queries the response was YES. [2024-06-04 14:53:37,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117329 conditions, 15823 events. 11221/15823 cut-off events. For 820900/820903 co-relation queries the response was YES. Maximal size of possible extension queue 515. Compared 89810 event pairs, 3920 based on Foata normal form. 8/15819 useless extension candidates. Maximal degree in co-relation 117258. Up to 14221 conditions per place. [2024-06-04 14:53:37,103 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 166 selfloop transitions, 113 changer transitions 0/286 dead transitions. [2024-06-04 14:53:37,104 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 286 transitions, 3511 flow [2024-06-04 14:53:37,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:53:37,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:53:37,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 217 transitions. [2024-06-04 14:53:37,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5117924528301887 [2024-06-04 14:53:37,105 INFO L175 Difference]: Start difference. First operand has 165 places, 227 transitions, 2269 flow. Second operand 8 states and 217 transitions. [2024-06-04 14:53:37,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 286 transitions, 3511 flow [2024-06-04 14:53:37,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 286 transitions, 3311 flow, removed 35 selfloop flow, removed 7 redundant places. [2024-06-04 14:53:37,759 INFO L231 Difference]: Finished difference. Result has 167 places, 241 transitions, 2596 flow [2024-06-04 14:53:37,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2069, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2596, PETRI_PLACES=167, PETRI_TRANSITIONS=241} [2024-06-04 14:53:37,760 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 111 predicate places. [2024-06-04 14:53:37,760 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 241 transitions, 2596 flow [2024-06-04 14:53:37,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:37,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:53:37,761 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:53:37,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-04 14:53:37,761 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:53:37,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:53:37,761 INFO L85 PathProgramCache]: Analyzing trace with hash 1402519169, now seen corresponding path program 3 times [2024-06-04 14:53:37,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:53:37,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494890321] [2024-06-04 14:53:37,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:53:37,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:53:37,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:53:38,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:53:38,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:53:38,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494890321] [2024-06-04 14:53:38,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494890321] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:53:38,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:53:38,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:53:38,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565143836] [2024-06-04 14:53:38,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:53:38,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:53:38,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:53:38,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:53:38,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:53:39,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-04 14:53:39,011 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 241 transitions, 2596 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:39,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:53:39,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-04 14:53:39,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:53:41,578 INFO L124 PetriNetUnfolderBase]: 11377/16067 cut-off events. [2024-06-04 14:53:41,579 INFO L125 PetriNetUnfolderBase]: For 890039/890042 co-relation queries the response was YES. [2024-06-04 14:53:41,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124062 conditions, 16067 events. 11377/16067 cut-off events. For 890039/890042 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 91444 event pairs, 3972 based on Foata normal form. 8/16063 useless extension candidates. Maximal degree in co-relation 123989. Up to 14337 conditions per place. [2024-06-04 14:53:41,797 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 168 selfloop transitions, 118 changer transitions 0/293 dead transitions. [2024-06-04 14:53:41,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 293 transitions, 3813 flow [2024-06-04 14:53:41,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:53:41,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:53:41,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 213 transitions. [2024-06-04 14:53:41,798 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5023584905660378 [2024-06-04 14:53:41,798 INFO L175 Difference]: Start difference. First operand has 167 places, 241 transitions, 2596 flow. Second operand 8 states and 213 transitions. [2024-06-04 14:53:41,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 293 transitions, 3813 flow [2024-06-04 14:53:42,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 293 transitions, 3636 flow, removed 66 selfloop flow, removed 3 redundant places. [2024-06-04 14:53:42,758 INFO L231 Difference]: Finished difference. Result has 172 places, 250 transitions, 2850 flow [2024-06-04 14:53:42,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2445, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2850, PETRI_PLACES=172, PETRI_TRANSITIONS=250} [2024-06-04 14:53:42,758 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 116 predicate places. [2024-06-04 14:53:42,758 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 250 transitions, 2850 flow [2024-06-04 14:53:42,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:42,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:53:42,759 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:53:42,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-04 14:53:42,759 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:53:42,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:53:42,759 INFO L85 PathProgramCache]: Analyzing trace with hash -1213228371, now seen corresponding path program 3 times [2024-06-04 14:53:42,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:53:42,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323758120] [2024-06-04 14:53:42,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:53:42,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:53:42,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:53:44,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:53:44,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:53:44,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323758120] [2024-06-04 14:53:44,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323758120] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:53:44,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:53:44,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:53:44,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850279596] [2024-06-04 14:53:44,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:53:44,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:53:44,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:53:44,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:53:44,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:53:44,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-04 14:53:44,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 250 transitions, 2850 flow. Second operand has 10 states, 10 states have (on average 14.6) internal successors, (146), 10 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:44,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:53:44,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-04 14:53:44,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:53:46,980 INFO L124 PetriNetUnfolderBase]: 12027/17001 cut-off events. [2024-06-04 14:53:46,980 INFO L125 PetriNetUnfolderBase]: For 962412/962433 co-relation queries the response was YES. [2024-06-04 14:53:47,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131404 conditions, 17001 events. 12027/17001 cut-off events. For 962412/962433 co-relation queries the response was YES. Maximal size of possible extension queue 546. Compared 97175 event pairs, 4096 based on Foata normal form. 52/17032 useless extension candidates. Maximal degree in co-relation 131329. Up to 15336 conditions per place. [2024-06-04 14:53:47,444 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 221 selfloop transitions, 105 changer transitions 0/333 dead transitions. [2024-06-04 14:53:47,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 333 transitions, 4232 flow [2024-06-04 14:53:47,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:53:47,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:53:47,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 224 transitions. [2024-06-04 14:53:47,448 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.469601677148847 [2024-06-04 14:53:47,448 INFO L175 Difference]: Start difference. First operand has 172 places, 250 transitions, 2850 flow. Second operand 9 states and 224 transitions. [2024-06-04 14:53:47,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 333 transitions, 4232 flow [2024-06-04 14:53:48,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 333 transitions, 3998 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-04 14:53:48,346 INFO L231 Difference]: Finished difference. Result has 182 places, 288 transitions, 3495 flow [2024-06-04 14:53:48,351 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2645, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3495, PETRI_PLACES=182, PETRI_TRANSITIONS=288} [2024-06-04 14:53:48,352 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 126 predicate places. [2024-06-04 14:53:48,352 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 288 transitions, 3495 flow [2024-06-04 14:53:48,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.6) internal successors, (146), 10 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:48,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:53:48,352 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:53:48,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-04 14:53:48,353 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:53:48,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:53:48,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1155794019, now seen corresponding path program 4 times [2024-06-04 14:53:48,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:53:48,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749082274] [2024-06-04 14:53:48,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:53:48,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:53:48,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:53:49,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:53:49,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:53:49,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749082274] [2024-06-04 14:53:49,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749082274] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:53:49,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:53:49,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:53:49,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146334990] [2024-06-04 14:53:49,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:53:49,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:53:49,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:53:49,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:53:49,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:53:49,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-04 14:53:49,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 288 transitions, 3495 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:49,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:53:49,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-04 14:53:49,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:53:53,236 INFO L124 PetriNetUnfolderBase]: 13295/18803 cut-off events. [2024-06-04 14:53:53,236 INFO L125 PetriNetUnfolderBase]: For 1039603/1039614 co-relation queries the response was YES. [2024-06-04 14:53:53,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 146234 conditions, 18803 events. 13295/18803 cut-off events. For 1039603/1039614 co-relation queries the response was YES. Maximal size of possible extension queue 612. Compared 109021 event pairs, 3826 based on Foata normal form. 46/18841 useless extension candidates. Maximal degree in co-relation 146153. Up to 16315 conditions per place. [2024-06-04 14:53:53,440 INFO L140 encePairwiseOnDemand]: 38/53 looper letters, 247 selfloop transitions, 185 changer transitions 0/439 dead transitions. [2024-06-04 14:53:53,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 439 transitions, 6027 flow [2024-06-04 14:53:53,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:53:53,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:53:53,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 237 transitions. [2024-06-04 14:53:53,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4968553459119497 [2024-06-04 14:53:53,442 INFO L175 Difference]: Start difference. First operand has 182 places, 288 transitions, 3495 flow. Second operand 9 states and 237 transitions. [2024-06-04 14:53:53,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 439 transitions, 6027 flow [2024-06-04 14:53:54,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 439 transitions, 5801 flow, removed 36 selfloop flow, removed 2 redundant places. [2024-06-04 14:53:54,483 INFO L231 Difference]: Finished difference. Result has 193 places, 373 transitions, 5143 flow [2024-06-04 14:53:54,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=3371, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5143, PETRI_PLACES=193, PETRI_TRANSITIONS=373} [2024-06-04 14:53:54,484 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 137 predicate places. [2024-06-04 14:53:54,484 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 373 transitions, 5143 flow [2024-06-04 14:53:54,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:54,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:53:54,484 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:53:54,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-04 14:53:54,485 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:53:54,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:53:54,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1212858975, now seen corresponding path program 1 times [2024-06-04 14:53:54,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:53:54,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833000876] [2024-06-04 14:53:54,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:53:54,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:53:54,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:53:55,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:53:55,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:53:55,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833000876] [2024-06-04 14:53:55,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833000876] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:53:55,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:53:55,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:53:55,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781734448] [2024-06-04 14:53:55,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:53:55,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:53:55,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:53:55,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:53:55,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:53:55,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-04 14:53:55,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 373 transitions, 5143 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:55,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:53:55,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-04 14:53:55,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:53:59,572 INFO L124 PetriNetUnfolderBase]: 13322/18844 cut-off events. [2024-06-04 14:53:59,573 INFO L125 PetriNetUnfolderBase]: For 1048093/1048114 co-relation queries the response was YES. [2024-06-04 14:53:59,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148878 conditions, 18844 events. 13322/18844 cut-off events. For 1048093/1048114 co-relation queries the response was YES. Maximal size of possible extension queue 607. Compared 109187 event pairs, 3984 based on Foata normal form. 22/18861 useless extension candidates. Maximal degree in co-relation 148791. Up to 18012 conditions per place. [2024-06-04 14:53:59,836 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 364 selfloop transitions, 51 changer transitions 0/422 dead transitions. [2024-06-04 14:53:59,837 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 422 transitions, 6320 flow [2024-06-04 14:53:59,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:53:59,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:53:59,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-04 14:53:59,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46226415094339623 [2024-06-04 14:53:59,838 INFO L175 Difference]: Start difference. First operand has 193 places, 373 transitions, 5143 flow. Second operand 8 states and 196 transitions. [2024-06-04 14:53:59,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 422 transitions, 6320 flow [2024-06-04 14:54:01,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 422 transitions, 6071 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-04 14:54:01,204 INFO L231 Difference]: Finished difference. Result has 198 places, 385 transitions, 5242 flow [2024-06-04 14:54:01,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=4901, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5242, PETRI_PLACES=198, PETRI_TRANSITIONS=385} [2024-06-04 14:54:01,204 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 142 predicate places. [2024-06-04 14:54:01,204 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 385 transitions, 5242 flow [2024-06-04 14:54:01,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:01,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:01,205 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:01,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-04 14:54:01,205 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:54:01,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:01,205 INFO L85 PathProgramCache]: Analyzing trace with hash -1686532669, now seen corresponding path program 1 times [2024-06-04 14:54:01,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:01,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594266546] [2024-06-04 14:54:01,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:01,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:01,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:02,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:02,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:02,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594266546] [2024-06-04 14:54:02,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594266546] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:02,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:02,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:54:02,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687100672] [2024-06-04 14:54:02,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:02,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:54:02,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:02,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:54:02,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:54:02,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-04 14:54:02,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 385 transitions, 5242 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:02,198 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:02,198 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-04 14:54:02,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:05,625 INFO L124 PetriNetUnfolderBase]: 12503/17972 cut-off events. [2024-06-04 14:54:05,626 INFO L125 PetriNetUnfolderBase]: For 1082824/1082918 co-relation queries the response was YES. [2024-06-04 14:54:05,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144692 conditions, 17972 events. 12503/17972 cut-off events. For 1082824/1082918 co-relation queries the response was YES. Maximal size of possible extension queue 614. Compared 107843 event pairs, 3976 based on Foata normal form. 19/17889 useless extension candidates. Maximal degree in co-relation 144603. Up to 16721 conditions per place. [2024-06-04 14:54:05,989 INFO L140 encePairwiseOnDemand]: 44/53 looper letters, 340 selfloop transitions, 19 changer transitions 0/411 dead transitions. [2024-06-04 14:54:05,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 411 transitions, 6118 flow [2024-06-04 14:54:05,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:54:05,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:54:05,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-04 14:54:05,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4748427672955975 [2024-06-04 14:54:05,990 INFO L175 Difference]: Start difference. First operand has 198 places, 385 transitions, 5242 flow. Second operand 6 states and 151 transitions. [2024-06-04 14:54:05,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 411 transitions, 6118 flow [2024-06-04 14:54:07,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 411 transitions, 5943 flow, removed 41 selfloop flow, removed 5 redundant places. [2024-06-04 14:54:07,782 INFO L231 Difference]: Finished difference. Result has 199 places, 389 transitions, 5200 flow [2024-06-04 14:54:07,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=5067, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5200, PETRI_PLACES=199, PETRI_TRANSITIONS=389} [2024-06-04 14:54:07,783 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 143 predicate places. [2024-06-04 14:54:07,783 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 389 transitions, 5200 flow [2024-06-04 14:54:07,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:07,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:07,783 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:07,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-04 14:54:07,784 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:54:07,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:07,784 INFO L85 PathProgramCache]: Analyzing trace with hash -966647061, now seen corresponding path program 4 times [2024-06-04 14:54:07,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:07,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011941380] [2024-06-04 14:54:07,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:07,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:07,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:08,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:08,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:08,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011941380] [2024-06-04 14:54:08,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011941380] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:08,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:08,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:54:08,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625243716] [2024-06-04 14:54:08,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:08,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:54:08,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:08,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:54:08,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:54:09,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-04 14:54:09,014 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 389 transitions, 5200 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:09,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:09,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-04 14:54:09,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand